NGINX

2 Topics

A Closer Look at mTLS and the Default Server in F5 NGINX
When you connect to an HTTPS site, your browser (or other client) typically sends a Server Name Indication (SNI)—the hostname it wants to reach—during the TLS handshake. This lets F5 NGINX figure out which cryptographic settings to use for that specific hostname. In other words, SNI influences: Which x509 certificate is sent to the client Which cryptographic algorithms are offered Which session ticket key is used for encrypting and decrypting session tickets Which session cache is active, if you’re using caching Which Certificate Authority (CA) is checked when you require mutual TLS (mTLS) If the client doesn’t provide SNI or if the hostname doesn’t match any of your configured server_name directives, F5 NGINX defaults to a “fallback” setup—usually called the default server. That means: The default server’s certificate, ciphers, ticket key, and session cache get used automatically. If you haven’t explicitly marked any server block as default_server, F5 NGINX chooses the first block for that listen socket in your configuration as the fallback. Here’s the crucial detail: once the TLS handshake finishes and a certificate has been selected (for example, from the default server), F5 NGINX will still examine the HTTP Host header for request routing. If it specifies a different domain matching another server block, the request is forwarded there at the HTTP layer. From the client’s perspective, however, the originally cryptographic settings remain in effect, because the TLS negotiation is already complete. Single Server Block In the simplest configuration, only one server block listens for TLS connections on a given IP address and port: server { listen 443 ssl; server_name example.com; ssl_certificate /etc/ssl/certs/example.com.crt; ssl_certificate_key /etc/ssl/private/example.com.key; ssl_client_certificate /etc/ssl/certs/ca.crt; ssl_verify_client on; # Additional configuration, such as locations and logging } In this example: If the client provides SNI matching example.com, F5 NGINX presents /etc/ssl/certs/example.com.crt and verifies the client certificate against /etc/ssl/certs/ca.crt. If the client does not provide SNI, this same server block still handles the request because there are no other blocks to consider; the same certificate and CA (ca.crt) apply. Once authenticated, the client proceeds under the cryptographic settings of this single server block. With only one server block present, there is no additional routing or fallback scenario to manage. Multiple Server Blocks on the Same IP/Port When multiple server blocks listen on the same IP address and port, F5 NGINX uses SNI to determine which server block should handle the request. If no matching SNI is found, requests fall back to the server marked with default_server. As previously stated, if the default_server is not explicitly defined, F5 NGINX will use the first server block in the configuration as the fallback. # example.com and the default server (first in config) server { listen 443 ssl; server_name example.com; ssl_certificate /etc/ssl/certs/example.com.crt; ssl_certificate_key /etc/ssl/private/example.com.key; ssl_client_certificate /etc/ssl/certs/ca_A.crt; ssl_verify_client on; # Additional configuration, such as locations and logging } # www.example.com server { listen 443 ssl; server_name www.example.com; ssl_certificate /etc/ssl/certs/www.example.com.crt; ssl_certificate_key /etc/ssl/private/www.example.com.key; ssl_client_certificate /etc/ssl/certs/ca_B.crt; ssl_verify_client on; # Additional configuration, such as locations and logging } In this example: If the client provides SNI matching example.com, the first server block’s certificate (example.com.crt) and CA settings (ca_A.crt) are used. If the client provides SNI matching www.example.com, the second server block’s certificate (www.example.com.crt) and CA settings (ca_B.crt) are used. If the client does not provide SNI (or provides an unmatched server name), the first server block (example.com) acts as the default. Its certificate (example.com.crt) and CA (ca_A.crt) apply for the TLS handshake. After TLS is established under the default server, if the HTTP Host header is www.example.com, F5 NGINX routes the request to the second server block for application-level processing. However, the TLS session—including which certificate and CA were used—remains with the default server’s settings. This means the second server’s client certificate configuration (ca_B.crt) is not involved in re-validating the client, since no new TLS handshake occurs. Recommendations The fallback behavior mentioned above might not fit all use cases. If it poses a risk or doesn’t align with your security needs, consider reconfiguring F5 NGINX (e.g., setting up a stub default server or applying tighter mTLS rules) to restrict or eliminate this fallback path. Defining a Default Server (or Stub Default Server) It is highly recommended to define a default server in F5 NGINX. If you do not want to allow fallback for clients without valid SNI, you can set up a stub default server (configuration example below). A stub default server, as shown below, ensures that unmatched SNI (or no SNI) connections are rejected at the handshake level, preventing unintended fallback to a less restrictive configuration. Perhaps most importantly, it does not contain any client authentication configuration directives, forcing client authentication to occur in the most specific server blocks. In the example below I have added `ssl_verify_client off;` for illustrative purposes, however the setting of `off` is the default. Note: ssl_reject_handshake appeared in nginx version 1.19.4. For versions prior to that, one can define a server that simply returns the special 444 HTTP response code. Authorization Checks in All Server Blocks Even with a stub default server, all server blocks should implement authorization checks if they serve sensitive content. Because requests may be forwarded from the default server to a non-default server after decryption, every server block must enforce its own mTLS policies and check variables such as $ssl_client_s_dn or $ssl_client_i_dn (if you rely on client certificates) to ensure consistent and robust security across your deployment. # explicit default server server { listen 443 ssl default_server; ssl_reject_handshake on; ssl_verify_client off; ssl_protocols TLSv1.2 TLSv1.3; } # example.com server { listen 443 ssl; server_name example.com; ssl_certificate /etc/ssl/certs/example.com.crt; ssl_certificate_key /etc/ssl/private/example.com.key; ssl_client_certificate /etc/ssl/certs/ca_A.crt; ssl_verify_client on; # Check subject DN if ($ssl_client_s_dn !~ "CN=TrustedClient_A,O=MyOrg") { return 403; } # Check issuer DN (this may not be necessary for all deployments) if ($ssl_client_i_dn !~ "CN=TrustedCA_A,O=MyOrg") { return 403; } # Additional configuration, such as locations and logging } # This server block handles requests for www.example.com server { listen 443 ssl; server_name www.example.com; ssl_certificate /etc/ssl/certs/www.example.com.crt; ssl_certificate_key /etc/ssl/private/www.example.com.key; ssl_client_certificate /etc/ssl/certs/ca_B.crt; ssl_verify_client on; # Check subject DN if ($ssl_client_s_dn !~ "CN=TrustedClient_B,O=MyOrg") { return 403; } # Check issuer DN (this may not be necessary for all deployments) if ($ssl_client_i_dn !~ "CN=TrustedCA_B,O=MyOrg") { return 403; } # Additional configuration, such as locations and logging } Conclusion In summary, working with multiple server blocks, SNI, and mTLS can make F5 NGINX setups more complex. Knowing precisely which server block handles the TLS handshake—particularly when there is no SNI or an unmatched name—helps maintain the desired security posture. Careful attention to these details keeps certificates and policies consistent for all client connections.
Jordan_Zebor
Feb 26, 2025 Place Security Insights
120Views
2likes
0Comments
F5 NGINX HTTP Request Header Rules: What’s Permitted and What’s Not
When managing web servers like F5 NGINX, it's crucial to understand the rules that govern HTTP headers—particularly which characters are allowed or disallowed in both header names and values. HTTP headers play a vital role in the communication between a client and server, carrying essential metadata such as content type, length, and caching policies. NGINX strictly enforces these rules to ensure compliance with HTTP/1.1, HTTP/2, and HTTP/3 protocols. Misconfigured headers or the use of improper characters can lead to a range of issues, including security vulnerabilities, degraded performance, or even rejected requests. One common security threat, HTTP Request Smuggling, exploits desynchronization between devices involved in handling the request, such as frontends, caching servers, load balancers, and web servers. These attacks rely on inconsistencies in how each device parses the request, enabling malicious actors to inject hidden or split requests. This article outlines the allowed and disallowed characters in HTTP request headers as enforced by NGINX, which I compiled through code review, test case review and manual testing for HTTP Smuggling on NGINX version "nginx/1.25.5 (nginx-plus-r32-p1)". If I missed something please let me know by contacting the F5 SIRT. Allowed Characters Header Names Lowercase letters: (a-z) Uppercase letters: (A-Z) Allowed in HTTP/1.1 Disallowed in HTTP/2 and HTTP/3, which require lowercase. Digits: (0-9) Hyphen: (-) Underscore: (_) Allowed in all versions only if underscores_in_headers is enabled Colon: (:) Allowed only as a prefix in HTTP/2 and HTTP/3 pseudo headers. Header Values Printable ASCII characters: Characters from ! to ~, including digits, letters, punctuation, and symbols, are allowed. Space: (0x20) Allowed within the value. Horizontal Tab (HT): (0x09) Generally allowed within values but with exceptions in headers such as Content-Length and Host (details below). Disallowed Characters Header Names Control Characters: ASCII control characters (<= 0x20), including space and horizontal tab, are disallowed in header names. DEL (0x7f): The delete character is not allowed. Colon: (:) Disallowed in header names except for HTTP/2 and HTTP/3 pseudo headers. Uppercase Letters: (A-Z) Disallowed in HTTP/2 and HTTP/3 header names (must be lowercase). Special characters: Characters such as ()<>@,;:\"/[]?={} are implicitly disallowed as they don’t belong to any allowed category for header names. Header Values Null Character: (\0) Disallowed in header values. Line Feed (LF): (0x0A) Not allowed within the value and used only to terminate headers. Carriage Return (CR): (0x0D) Not allowed within the value, used for header termination. Control Characters (<= 0x20) with special conditions for Horizontal Tab (HT): Horizontal Tab (HT, 0x09): Disallowed in the Host header value in HTTP/1. Disallowed in the pseudo-header values in HTTP/2 and HTTP/3. Disallowed in the Content-Length header value in HTTP/1. Summary This list of allowed and disallowed characters provides an overview of how NGINX handles HTTP headers across different protocol versions. While HTTP/1.1 is somewhat lenient with uppercase letters and certain characters, HTTP/2 and HTTP/3 enforce stricter validation rules, particularly for header names. Understanding these restrictions ensures your server configuration remains compliant with protocol specifications and avoids potential issues with malformed headers.
Jordan_Zebor
Nov 25, 2024 Place Security Insights
454Views
1like
1Comment

"}},"componentScriptGroups({\"componentId\":\"custom.widget.Beta_MetaNav\"})":{"__typename":"ComponentScriptGroups","scriptGroups":{"__typename":"ComponentScriptGroupsDefinition","afterInteractive":{"__typename":"PageScriptGroupDefinition","group":"AFTER_INTERACTIVE","scriptIds":[]},"lazyOnLoad":{"__typename":"PageScriptGroupDefinition","group":"LAZY_ON_LOAD","scriptIds":[]}},"componentScripts":[]},"component({\"componentId\":\"custom.widget.Beta_Footer\"})":{"__typename":"Component","render({\"context\":{\"component\":{\"entities\":[],\"props\":{}},\"page\":{\"entities\":[],\"name\":\"TagPage\",\"props\":{},\"url\":\"https://community.f5.com/tag/NGINX\"}}})":{"__typename":"ComponentRenderResult","html":"

Trademarks Policies Privacy California Privacy Do Not Sell My Personal Information

"}},"componentScriptGroups({\"componentId\":\"custom.widget.Beta_Footer\"})":{"__typename":"ComponentScriptGroups","scriptGroups":{"__typename":"ComponentScriptGroupsDefinition","afterInteractive":{"__typename":"PageScriptGroupDefinition","group":"AFTER_INTERACTIVE","scriptIds":[]},"lazyOnLoad":{"__typename":"PageScriptGroupDefinition","group":"LAZY_ON_LOAD","scriptIds":[]}},"componentScripts":[]},"component({\"componentId\":\"custom.widget.Tag_Manager_Helper\"})":{"__typename":"Component","render({\"context\":{\"component\":{\"entities\":[],\"props\":{}},\"page\":{\"entities\":[],\"name\":\"TagPage\",\"props\":{},\"url\":\"https://community.f5.com/tag/NGINX\"}}})":{"__typename":"ComponentRenderResult","html":" "}},"componentScriptGroups({\"componentId\":\"custom.widget.Tag_Manager_Helper\"})":{"__typename":"ComponentScriptGroups","scriptGroups":{"__typename":"ComponentScriptGroupsDefinition","afterInteractive":{"__typename":"PageScriptGroupDefinition","group":"AFTER_INTERACTIVE","scriptIds":[]},"lazyOnLoad":{"__typename":"PageScriptGroupDefinition","group":"LAZY_ON_LOAD","scriptIds":[]}},"componentScripts":[]},"component({\"componentId\":\"custom.widget.Consent_Blackbar\"})":{"__typename":"Component","render({\"context\":{\"component\":{\"entities\":[],\"props\":{}},\"page\":{\"entities\":[],\"name\":\"TagPage\",\"props\":{},\"url\":\"https://community.f5.com/tag/NGINX\"}}})":{"__typename":"ComponentRenderResult","html":"

"}},"componentScriptGroups({\"componentId\":\"custom.widget.Consent_Blackbar\"})":{"__typename":"ComponentScriptGroups","scriptGroups":{"__typename":"ComponentScriptGroupsDefinition","afterInteractive":{"__typename":"PageScriptGroupDefinition","group":"AFTER_INTERACTIVE","scriptIds":[]},"lazyOnLoad":{"__typename":"PageScriptGroupDefinition","group":"LAZY_ON_LOAD","scriptIds":[]}},"componentScripts":[]},"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"components/community/NavbarDropdownToggle\"]})":[{"__ref":"CachedAsset:text:en_US-components/community/NavbarDropdownToggle-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"shared/client/components/common/OverflowNav\"]})":[{"__ref":"CachedAsset:text:en_US-shared/client/components/common/OverflowNav-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"components/messages/MessageView/MessageViewInline\"]})":[{"__ref":"CachedAsset:text:en_US-components/messages/MessageView/MessageViewInline-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"components/customComponent/CustomComponent\"]})":[{"__ref":"CachedAsset:text:en_US-components/customComponent/CustomComponent-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"components/users/UserLink\"]})":[{"__ref":"CachedAsset:text:en_US-components/users/UserLink-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"components/messages/MessageSubject\"]})":[{"__ref":"CachedAsset:text:en_US-components/messages/MessageSubject-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"components/messages/MessageBody\"]})":[{"__ref":"CachedAsset:text:en_US-components/messages/MessageBody-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"components/messages/MessageTime\"]})":[{"__ref":"CachedAsset:text:en_US-components/messages/MessageTime-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"shared/client/components/nodes/NodeIcon\"]})":[{"__ref":"CachedAsset:text:en_US-shared/client/components/nodes/NodeIcon-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"components/messages/MessageUnreadCount\"]})":[{"__ref":"CachedAsset:text:en_US-components/messages/MessageUnreadCount-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"components/messages/MessageViewCount\"]})":[{"__ref":"CachedAsset:text:en_US-components/messages/MessageViewCount-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"components/kudos/KudosCount\"]})":[{"__ref":"CachedAsset:text:en_US-components/kudos/KudosCount-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"components/messages/MessageRepliesCount\"]})":[{"__ref":"CachedAsset:text:en_US-components/messages/MessageRepliesCount-1744046272649"}],"cachedText({\"lastModified\":\"1744046272649\",\"locale\":\"en-US\",\"namespaces\":[\"shared/client/components/users/UserAvatar\"]})":[{"__ref":"CachedAsset:text:en_US-shared/client/components/users/UserAvatar-1744046272649"}]},"CachedAsset:pages-1743758597252":{"__typename":"CachedAsset","id":"pages-1743758597252","value":[{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.GetInvolved.MvpProgram","type":"COMMUNITY","urlPath":"/c/how-do-i/get-involved/mvp-program","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"BlogViewAllPostsPage","type":"BLOG","urlPath":"/category/:categoryId/blog/:boardId/all-posts/(/:after|/:before)?","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"CasePortalPage","type":"CASE_PORTAL","urlPath":"/caseportal","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"CreateGroupHubPage","type":"GROUP_HUB","urlPath":"/groups/create","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"CaseViewPage","type":"CASE_DETAILS","urlPath":"/case/:caseId/:caseNumber","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"InboxPage","type":"COMMUNITY","urlPath":"/inbox","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.GetInvolved.AdvocacyProgram","type":"COMMUNITY","urlPath":"/c/how-do-i/get-involved/advocacy-program","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.GetHelp.NonCustomer","type":"COMMUNITY","urlPath":"/c/how-do-i/get-help/non-customer","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HelpFAQPage","type":"COMMUNITY","urlPath":"/help","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.GetHelp.F5Customer","type":"COMMUNITY","urlPath":"/c/how-do-i/get-help/f5-customer","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"IdeaMessagePage","type":"IDEA_POST","urlPath":"/idea/:boardId/:messageSubject/:messageId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"IdeaViewAllIdeasPage","type":"IDEA","urlPath":"/category/:categoryId/ideas/:boardId/all-ideas/(/:after|/:before)?","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"LoginPage","type":"USER","urlPath":"/signin","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"BlogPostPage","type":"BLOG","urlPath":"/category/:categoryId/blogs/:boardId/create","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.GetInvolved","type":"COMMUNITY","urlPath":"/c/how-do-i/get-involved","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.Learn","type":"COMMUNITY","urlPath":"/c/how-do-i/learn","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1739501996000,"localOverride":null,"page":{"id":"Test","type":"CUSTOM","urlPath":"/custom-test-2","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ThemeEditorPage","type":"COMMUNITY","urlPath":"/designer/themes","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"TkbViewAllArticlesPage","type":"TKB","urlPath":"/category/:categoryId/kb/:boardId/all-articles/(/:after|/:before)?","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"OccasionEditPage","type":"EVENT","urlPath":"/event/:boardId/:messageSubject/:messageId/edit","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"OAuthAuthorizationAllowPage","type":"USER","urlPath":"/auth/authorize/allow","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"PageEditorPage","type":"COMMUNITY","urlPath":"/designer/pages","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"PostPage","type":"COMMUNITY","urlPath":"/category/:categoryId/:boardId/create","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ForumBoardPage","type":"FORUM","urlPath":"/category/:categoryId/discussions/:boardId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"TkbBoardPage","type":"TKB","urlPath":"/category/:categoryId/kb/:boardId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"EventPostPage","type":"EVENT","urlPath":"/category/:categoryId/events/:boardId/create","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"UserBadgesPage","type":"COMMUNITY","urlPath":"/users/:login/:userId/badges","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"GroupHubMembershipAction","type":"GROUP_HUB","urlPath":"/membership/join/:nodeId/:membershipType","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"MaintenancePage","type":"COMMUNITY","urlPath":"/maintenance","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"IdeaReplyPage","type":"IDEA_REPLY","urlPath":"/idea/:boardId/:messageSubject/:messageId/comments/:replyId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"UserSettingsPage","type":"USER","urlPath":"/mysettings/:userSettingsTab","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"GroupHubsPage","type":"GROUP_HUB","urlPath":"/groups","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ForumPostPage","type":"FORUM","urlPath":"/category/:categoryId/discussions/:boardId/create","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"OccasionRsvpActionPage","type":"OCCASION","urlPath":"/event/:boardId/:messageSubject/:messageId/rsvp/:responseType","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"VerifyUserEmailPage","type":"USER","urlPath":"/verifyemail/:userId/:verifyEmailToken","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"AllOccasionsPage","type":"OCCASION","urlPath":"/category/:categoryId/events/:boardId/all-events/(/:after|/:before)?","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"EventBoardPage","type":"EVENT","urlPath":"/category/:categoryId/events/:boardId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"TkbReplyPage","type":"TKB_REPLY","urlPath":"/kb/:boardId/:messageSubject/:messageId/comments/:replyId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"IdeaBoardPage","type":"IDEA","urlPath":"/category/:categoryId/ideas/:boardId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"CommunityGuideLinesPage","type":"COMMUNITY","urlPath":"/communityguidelines","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"CaseCreatePage","type":"SALESFORCE_CASE_CREATION","urlPath":"/caseportal/create","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"TkbEditPage","type":"TKB","urlPath":"/kb/:boardId/:messageSubject/:messageId/edit","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ForgotPasswordPage","type":"USER","urlPath":"/forgotpassword","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"IdeaEditPage","type":"IDEA","urlPath":"/idea/:boardId/:messageSubject/:messageId/edit","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"TagPage","type":"COMMUNITY","urlPath":"/tag/:tagName","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"BlogBoardPage","type":"BLOG","urlPath":"/category/:categoryId/blog/:boardId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"OccasionMessagePage","type":"OCCASION_TOPIC","urlPath":"/event/:boardId/:messageSubject/:messageId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ManageContentPage","type":"COMMUNITY","urlPath":"/managecontent","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ClosedMembershipNodeNonMembersPage","type":"GROUP_HUB","urlPath":"/closedgroup/:groupHubId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.GetHelp.Community","type":"COMMUNITY","urlPath":"/c/how-do-i/get-help/community","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"CommunityPage","type":"COMMUNITY","urlPath":"/","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.GetInvolved.ContributeCode","type":"COMMUNITY","urlPath":"/c/how-do-i/get-involved/contribute-code","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ForumMessagePage","type":"FORUM_TOPIC","urlPath":"/discussions/:boardId/:messageSubject/:messageId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"IdeaPostPage","type":"IDEA","urlPath":"/category/:categoryId/ideas/:boardId/create","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"BlogMessagePage","type":"BLOG_ARTICLE","urlPath":"/blog/:boardId/:messageSubject/:messageId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"RegistrationPage","type":"USER","urlPath":"/register","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"EditGroupHubPage","type":"GROUP_HUB","urlPath":"/group/:groupHubId/edit","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ForumEditPage","type":"FORUM","urlPath":"/discussions/:boardId/:messageSubject/:messageId/edit","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ResetPasswordPage","type":"USER","urlPath":"/resetpassword/:userId/:resetPasswordToken","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"TkbMessagePage","type":"TKB_ARTICLE","urlPath":"/kb/:boardId/:messageSubject/:messageId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.Learn.AboutIrules","type":"COMMUNITY","urlPath":"/c/how-do-i/learn/about-irules","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"BlogEditPage","type":"BLOG","urlPath":"/blog/:boardId/:messageSubject/:messageId/edit","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.GetHelp.F5Support","type":"COMMUNITY","urlPath":"/c/how-do-i/get-help/f5-support","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ManageUsersPage","type":"USER","urlPath":"/users/manage/:tab?/:manageUsersTab?","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ForumReplyPage","type":"FORUM_REPLY","urlPath":"/discussions/:boardId/:messageSubject/:messageId/replies/:replyId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"PrivacyPolicyPage","type":"COMMUNITY","urlPath":"/privacypolicy","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"NotificationPage","type":"COMMUNITY","urlPath":"/notifications","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"UserPage","type":"USER","urlPath":"/users/:login/:userId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HealthCheckPage","type":"COMMUNITY","urlPath":"/health","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"OccasionReplyPage","type":"OCCASION_REPLY","urlPath":"/event/:boardId/:messageSubject/:messageId/comments/:replyId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ManageMembersPage","type":"GROUP_HUB","urlPath":"/group/:groupHubId/manage/:tab?","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"SearchResultsPage","type":"COMMUNITY","urlPath":"/search","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"BlogReplyPage","type":"BLOG_REPLY","urlPath":"/blog/:boardId/:messageSubject/:messageId/replies/:replyId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"GroupHubPage","type":"GROUP_HUB","urlPath":"/group/:groupHubId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"TermsOfServicePage","type":"COMMUNITY","urlPath":"/termsofservice","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.GetHelp","type":"COMMUNITY","urlPath":"/c/how-do-i/get-help","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI.GetHelp.SecurityIncident","type":"COMMUNITY","urlPath":"/c/how-do-i/get-help/security-incident","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"CategoryPage","type":"CATEGORY","urlPath":"/category/:categoryId","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"ForumViewAllTopicsPage","type":"FORUM","urlPath":"/category/:categoryId/discussions/:boardId/all-topics/(/:after|/:before)?","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"TkbPostPage","type":"TKB","urlPath":"/category/:categoryId/kbs/:boardId/create","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"GroupHubPostPage","type":"GROUP_HUB","urlPath":"/group/:groupHubId/:boardId/create","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1743758597252,"localOverride":null,"page":{"id":"HowDoI","type":"COMMUNITY","urlPath":"/c/how-do-i","__typename":"PageDescriptor"},"__typename":"PageResource"}],"localOverride":false},"CachedAsset:text:en_US-components/context/AppContext/AppContextProvider-0":{"__typename":"CachedAsset","id":"text:en_US-components/context/AppContext/AppContextProvider-0","value":{"noCommunity":"Cannot find community","noUser":"Cannot find current user","noNode":"Cannot find node with id {nodeId}","noMessage":"Cannot find message with id {messageId}"},"localOverride":false},"CachedAsset:text:en_US-shared/client/components/common/Loading/LoadingDot-0":{"__typename":"CachedAsset","id":"text:en_US-shared/client/components/common/Loading/LoadingDot-0","value":{"title":"Loading..."},"localOverride":false},"User:user:-1":{"__typename":"User","id":"user:-1","uid":-1,"login":"Former Member","email":"","avatar":null,"rank":null,"kudosWeight":1,"registrationData":{"__typename":"RegistrationData","status":"ANONYMOUS","registrationTime":null,"confirmEmailStatus":false,"registrationAccessLevel":"VIEW","ssoRegistrationFields":[]},"ssoId":null,"profileSettings":{"__typename":"ProfileSettings","dateDisplayStyle":{"__typename":"InheritableStringSettingWithPossibleValues","key":"layout.friendly_dates_enabled","value":"false","localValue":"true","possibleValues":["true","false"]},"dateDisplayFormat":{"__typename":"InheritableStringSetting","key":"layout.format_pattern_date","value":"dd-MMM-yyyy","localValue":"MM-dd-yyyy"},"language":{"__typename":"InheritableStringSettingWithPossibleValues","key":"profile.language","value":"en-US","localValue":null,"possibleValues":["en-US"]}},"deleted":false},"Theme:customTheme1":{"__typename":"Theme","id":"customTheme1"},"CachedAsset:theme:customTheme1-1743758594774":{"__typename":"CachedAsset","id":"theme:customTheme1-1743758594774","value":{"id":"customTheme1","animation":{"fast":"150ms","normal":"250ms","slow":"500ms","slowest":"750ms","function":"cubic-bezier(0.07, 0.91, 0.51, 1)","__typename":"AnimationThemeSettings"},"avatar":{"borderRadius":"50%","collections":["custom"],"__typename":"AvatarThemeSettings"},"basics":{"browserIcon":{"imageAssetName":"JimmyPackets-512-1702592938213.png","imageLastModified":"1702592945815","__typename":"ThemeAsset"},"customerLogo":{"imageAssetName":"f5_logo_fix-1704824537976.svg","imageLastModified":"1704824540697","__typename":"ThemeAsset"},"maximumWidthOfPageContent":"1600px","oneColumnNarrowWidth":"800px","gridGutterWidthMd":"30px","gridGutterWidthXs":"10px","pageWidthStyle":"WIDTH_OF_PAGE_CONTENT","__typename":"BasicsThemeSettings"},"buttons":{"borderRadiusSm":"5px","borderRadius":"5px","borderRadiusLg":"5px","paddingY":"5px","paddingYLg":"7px","paddingYHero":"var(--lia-bs-btn-padding-y-lg)","paddingX":"12px","paddingXLg":"14px","paddingXHero":"42px","fontStyle":"NORMAL","fontWeight":"400","textTransform":"NONE","disabledOpacity":0.5,"primaryTextColor":"var(--lia-bs-white)","primaryTextHoverColor":"var(--lia-bs-white)","primaryTextActiveColor":"var(--lia-bs-white)","primaryBgColor":"var(--lia-bs-primary)","primaryBgHoverColor":"hsl(var(--lia-bs-primary-h), var(--lia-bs-primary-s), calc(var(--lia-bs-primary-l) * 0.85))","primaryBgActiveColor":"hsl(var(--lia-bs-primary-h), var(--lia-bs-primary-s), calc(var(--lia-bs-primary-l) * 0.7))","primaryBorder":"1px solid transparent","primaryBorderHover":"1px solid transparent","primaryBorderActive":"1px solid transparent","primaryBorderFocus":"1px solid var(--lia-bs-white)","primaryBoxShadowFocus":"0 0 0 1px var(--lia-bs-primary), 0 0 0 4px hsla(var(--lia-bs-primary-h), var(--lia-bs-primary-s), var(--lia-bs-primary-l), 0.2)","secondaryTextColor":"var(--lia-bs-gray-900)","secondaryTextHoverColor":"hsl(var(--lia-bs-gray-900-h), var(--lia-bs-gray-900-s), calc(var(--lia-bs-gray-900-l) * 0.95))","secondaryTextActiveColor":"hsl(var(--lia-bs-gray-900-h), var(--lia-bs-gray-900-s), calc(var(--lia-bs-gray-900-l) * 0.9))","secondaryBgColor":"var(--lia-bs-gray-400)","secondaryBgHoverColor":"hsl(var(--lia-bs-gray-400-h), var(--lia-bs-gray-400-s), calc(var(--lia-bs-gray-400-l) * 0.96))","secondaryBgActiveColor":"hsl(var(--lia-bs-gray-400-h), var(--lia-bs-gray-400-s), calc(var(--lia-bs-gray-400-l) * 0.92))","secondaryBorder":"1px solid transparent","secondaryBorderHover":"1px solid transparent","secondaryBorderActive":"1px solid transparent","secondaryBorderFocus":"1px solid transparent","secondaryBoxShadowFocus":"0 0 0 1px var(--lia-bs-primary), 0 0 0 4px hsla(var(--lia-bs-primary-h), var(--lia-bs-primary-s), var(--lia-bs-primary-l), 0.2)","tertiaryTextColor":"var(--lia-bs-gray-900)","tertiaryTextHoverColor":"hsl(var(--lia-bs-gray-900-h), var(--lia-bs-gray-900-s), calc(var(--lia-bs-gray-900-l) * 0.95))","tertiaryTextActiveColor":"hsl(var(--lia-bs-gray-900-h), var(--lia-bs-gray-900-s), calc(var(--lia-bs-gray-900-l) * 0.9))","tertiaryBgColor":"transparent","tertiaryBgHoverColor":"transparent","tertiaryBgActiveColor":"hsla(var(--lia-bs-black-h), var(--lia-bs-black-s), var(--lia-bs-black-l), 0.04)","tertiaryBorder":"1px solid transparent","tertiaryBorderHover":"1px solid hsla(var(--lia-bs-black-h), var(--lia-bs-black-s), var(--lia-bs-black-l), 0.08)","tertiaryBorderActive":"1px solid transparent","tertiaryBorderFocus":"1px solid transparent","tertiaryBoxShadowFocus":"0 0 0 1px var(--lia-bs-primary), 0 0 0 4px hsla(var(--lia-bs-primary-h), var(--lia-bs-primary-s), var(--lia-bs-primary-l), 0.2)","destructiveTextColor":"var(--lia-bs-danger)","destructiveTextHoverColor":"hsl(var(--lia-bs-danger-h), var(--lia-bs-danger-s), calc(var(--lia-bs-danger-l) * 0.95))","destructiveTextActiveColor":"hsl(var(--lia-bs-danger-h), var(--lia-bs-danger-s), calc(var(--lia-bs-danger-l) * 0.9))","destructiveBgColor":"var(--lia-bs-gray-300)","destructiveBgHoverColor":"hsl(var(--lia-bs-gray-300-h), var(--lia-bs-gray-300-s), calc(var(--lia-bs-gray-300-l) * 0.96))","destructiveBgActiveColor":"hsl(var(--lia-bs-gray-300-h), var(--lia-bs-gray-300-s), calc(var(--lia-bs-gray-300-l) * 0.92))","destructiveBorder":"1px solid transparent","destructiveBorderHover":"1px solid transparent","destructiveBorderActive":"1px solid transparent","destructiveBorderFocus":"1px solid transparent","destructiveBoxShadowFocus":"0 0 0 1px var(--lia-bs-primary), 0 0 0 4px hsla(var(--lia-bs-primary-h), var(--lia-bs-primary-s), var(--lia-bs-primary-l), 0.2)","__typename":"ButtonsThemeSettings"},"border":{"color":"hsla(var(--lia-bs-black-h), var(--lia-bs-black-s), var(--lia-bs-black-l), 0.08)","mainContent":"NONE","sideContent":"NONE","radiusSm":"3px","radius":"5px","radiusLg":"9px","radius50":"100vw","__typename":"BorderThemeSettings"},"boxShadow":{"xs":"0 0 0 1px hsla(var(--lia-bs-gray-900-h), var(--lia-bs-gray-900-s), var(--lia-bs-gray-900-l), 0.08), 0 3px 0 -1px hsla(var(--lia-bs-gray-900-h), var(--lia-bs-gray-900-s), var(--lia-bs-gray-900-l), 0.08)","sm":"0 2px 4px hsla(var(--lia-bs-gray-900-h), var(--lia-bs-gray-900-s), var(--lia-bs-gray-900-l), 0.06)","md":"0 5px 15px hsla(var(--lia-bs-gray-900-h), var(--lia-bs-gray-900-s), var(--lia-bs-gray-900-l), 0.15)","lg":"0 10px 30px hsla(var(--lia-bs-gray-900-h), var(--lia-bs-gray-900-s), var(--lia-bs-gray-900-l), 0.15)","__typename":"BoxShadowThemeSettings"},"cards":{"bgColor":"var(--lia-panel-bg-color)","borderRadius":"var(--lia-panel-border-radius)","boxShadow":"var(--lia-box-shadow-xs)","__typename":"CardsThemeSettings"},"chip":{"maxWidth":"300px","height":"30px","__typename":"ChipThemeSettings"},"coreTypes":{"defaultMessageLinkColor":"var(--lia-bs-primary)","defaultMessageLinkDecoration":"none","defaultMessageLinkFontStyle":"NORMAL","defaultMessageLinkFontWeight":"400","defaultMessageFontStyle":"NORMAL","defaultMessageFontWeight":"400","forumColor":"#0C5C8D","forumFontFamily":"var(--lia-bs-font-family-base)","forumFontWeight":"var(--lia-default-message-font-weight)","forumLineHeight":"var(--lia-bs-line-height-base)","forumFontStyle":"var(--lia-default-message-font-style)","forumMessageLinkColor":"var(--lia-default-message-link-color)","forumMessageLinkDecoration":"var(--lia-default-message-link-decoration)","forumMessageLinkFontStyle":"var(--lia-default-message-link-font-style)","forumMessageLinkFontWeight":"var(--lia-default-message-link-font-weight)","forumSolvedColor":"#62C026","blogColor":"#730015","blogFontFamily":"var(--lia-bs-font-family-base)","blogFontWeight":"var(--lia-default-message-font-weight)","blogLineHeight":"1.75","blogFontStyle":"var(--lia-default-message-font-style)","blogMessageLinkColor":"var(--lia-default-message-link-color)","blogMessageLinkDecoration":"var(--lia-default-message-link-decoration)","blogMessageLinkFontStyle":"var(--lia-default-message-link-font-style)","blogMessageLinkFontWeight":"var(--lia-default-message-link-font-weight)","tkbColor":"#C20025","tkbFontFamily":"var(--lia-bs-font-family-base)","tkbFontWeight":"var(--lia-default-message-font-weight)","tkbLineHeight":"1.75","tkbFontStyle":"var(--lia-default-message-font-style)","tkbMessageLinkColor":"var(--lia-default-message-link-color)","tkbMessageLinkDecoration":"var(--lia-default-message-link-decoration)","tkbMessageLinkFontStyle":"var(--lia-default-message-link-font-style)","tkbMessageLinkFontWeight":"var(--lia-default-message-link-font-weight)","qandaColor":"#4099E2","qandaFontFamily":"var(--lia-bs-font-family-base)","qandaFontWeight":"var(--lia-default-message-font-weight)","qandaLineHeight":"var(--lia-bs-line-height-base)","qandaFontStyle":"var(--lia-default-message-link-font-style)","qandaMessageLinkColor":"var(--lia-default-message-link-color)","qandaMessageLinkDecoration":"var(--lia-default-message-link-decoration)","qandaMessageLinkFontStyle":"var(--lia-default-message-link-font-style)","qandaMessageLinkFontWeight":"var(--lia-default-message-link-font-weight)","qandaSolvedColor":"#3FA023","ideaColor":"#F3704B","ideaFontFamily":"var(--lia-bs-font-family-base)","ideaFontWeight":"var(--lia-default-message-font-weight)","ideaLineHeight":"var(--lia-bs-line-height-base)","ideaFontStyle":"var(--lia-default-message-font-style)","ideaMessageLinkColor":"var(--lia-default-message-link-color)","ideaMessageLinkDecoration":"var(--lia-default-message-link-decoration)","ideaMessageLinkFontStyle":"var(--lia-default-message-link-font-style)","ideaMessageLinkFontWeight":"var(--lia-default-message-link-font-weight)","contestColor":"#FCC845","contestFontFamily":"var(--lia-bs-font-family-base)","contestFontWeight":"var(--lia-default-message-font-weight)","contestLineHeight":"var(--lia-bs-line-height-base)","contestFontStyle":"var(--lia-default-message-link-font-style)","contestMessageLinkColor":"var(--lia-default-message-link-color)","contestMessageLinkDecoration":"var(--lia-default-message-link-decoration)","contestMessageLinkFontStyle":"ITALIC","contestMessageLinkFontWeight":"var(--lia-default-message-link-font-weight)","occasionColor":"#EE4B5B","occasionFontFamily":"var(--lia-bs-font-family-base)","occasionFontWeight":"var(--lia-default-message-font-weight)","occasionLineHeight":"var(--lia-bs-line-height-base)","occasionFontStyle":"var(--lia-default-message-font-style)","occasionMessageLinkColor":"var(--lia-default-message-link-color)","occasionMessageLinkDecoration":"var(--lia-default-message-link-decoration)","occasionMessageLinkFontStyle":"var(--lia-default-message-link-font-style)","occasionMessageLinkFontWeight":"var(--lia-default-message-link-font-weight)","grouphubColor":"#491B62","categoryColor":"#949494","communityColor":"#FFFFFF","productColor":"#949494","__typename":"CoreTypesThemeSettings"},"colors":{"black":"#000000","white":"#FFFFFF","gray100":"#F7F7F7","gray200":"#F7F7F7","gray300":"#E8E8E8","gray400":"#D9D9D9","gray500":"#CCCCCC","gray600":"#949494","gray700":"#707070","gray800":"#545454","gray900":"#333333","dark":"#545454","light":"#F7F7F7","primary":"#0C5C8D","secondary":"#333333","bodyText":"#222222","bodyBg":"#F5F5F5","info":"#1D9CD3","success":"#62C026","warning":"#FFD651","danger":"#C20025","alertSystem":"#FF6600","textMuted":"#707070","highlight":"#FFFCAD","outline":"var(--lia-bs-primary)","custom":["#C20025","#081B85","#009639","#B3C6D7","#7CC0EB","#F29A36"],"__typename":"ColorsThemeSettings"},"divider":{"size":"3px","marginLeft":"4px","marginRight":"4px","borderRadius":"50%","bgColor":"var(--lia-bs-gray-600)","bgColorActive":"var(--lia-bs-gray-600)","__typename":"DividerThemeSettings"},"dropdown":{"fontSize":"var(--lia-bs-font-size-sm)","borderColor":"var(--lia-bs-border-color)","borderRadius":"var(--lia-bs-border-radius-sm)","dividerBg":"var(--lia-bs-gray-300)","itemPaddingY":"5px","itemPaddingX":"20px","headerColor":"var(--lia-bs-gray-700)","__typename":"DropdownThemeSettings"},"email":{"link":{"color":"#0069D4","hoverColor":"#0061c2","decoration":"none","hoverDecoration":"underline","__typename":"EmailLinkSettings"},"border":{"color":"#e4e4e4","__typename":"EmailBorderSettings"},"buttons":{"borderRadiusLg":"5px","paddingXLg":"16px","paddingYLg":"7px","fontWeight":"700","primaryTextColor":"#ffffff","primaryTextHoverColor":"#ffffff","primaryBgColor":"#0069D4","primaryBgHoverColor":"#005cb8","primaryBorder":"1px solid transparent","primaryBorderHover":"1px solid transparent","__typename":"EmailButtonsSettings"},"panel":{"borderRadius":"5px","borderColor":"#e4e4e4","__typename":"EmailPanelSettings"},"__typename":"EmailThemeSettings"},"emoji":{"skinToneDefault":"#ffcd43","skinToneLight":"#fae3c5","skinToneMediumLight":"#e2cfa5","skinToneMedium":"#daa478","skinToneMediumDark":"#a78058","skinToneDark":"#5e4d43","__typename":"EmojiThemeSettings"},"heading":{"color":"var(--lia-bs-body-color)","fontFamily":"Inter","fontStyle":"NORMAL","fontWeight":"600","h1FontSize":"30px","h2FontSize":"25px","h3FontSize":"20px","h4FontSize":"18px","h5FontSize":"16px","h6FontSize":"16px","lineHeight":"1.2","subHeaderFontSize":"11px","subHeaderFontWeight":"500","h1LetterSpacing":"normal","h2LetterSpacing":"normal","h3LetterSpacing":"normal","h4LetterSpacing":"normal","h5LetterSpacing":"normal","h6LetterSpacing":"normal","subHeaderLetterSpacing":"2px","h1FontWeight":"var(--lia-bs-headings-font-weight)","h2FontWeight":"var(--lia-bs-headings-font-weight)","h3FontWeight":"var(--lia-bs-headings-font-weight)","h4FontWeight":"var(--lia-bs-headings-font-weight)","h5FontWeight":"var(--lia-bs-headings-font-weight)","h6FontWeight":"var(--lia-bs-headings-font-weight)","__typename":"HeadingThemeSettings"},"icons":{"size10":"10px","size12":"12px","size14":"14px","size16":"16px","size20":"20px","size24":"24px","size30":"30px","size40":"40px","size50":"50px","size60":"60px","size80":"80px","size120":"120px","size160":"160px","__typename":"IconsThemeSettings"},"imagePreview":{"bgColor":"var(--lia-bs-gray-900)","titleColor":"var(--lia-bs-white)","controlColor":"var(--lia-bs-white)","controlBgColor":"var(--lia-bs-gray-800)","__typename":"ImagePreviewThemeSettings"},"input":{"borderColor":"var(--lia-bs-gray-600)","disabledColor":"var(--lia-bs-gray-600)","focusBorderColor":"var(--lia-bs-primary)","labelMarginBottom":"10px","btnFontSize":"var(--lia-bs-font-size-sm)","focusBoxShadow":"0 0 0 3px hsla(var(--lia-bs-primary-h), var(--lia-bs-primary-s), var(--lia-bs-primary-l), 0.2)","checkLabelMarginBottom":"2px","checkboxBorderRadius":"3px","borderRadiusSm":"var(--lia-bs-border-radius-sm)","borderRadius":"var(--lia-bs-border-radius)","borderRadiusLg":"var(--lia-bs-border-radius-lg)","formTextMarginTop":"4px","textAreaBorderRadius":"var(--lia-bs-border-radius)","activeFillColor":"var(--lia-bs-primary)","__typename":"InputThemeSettings"},"loading":{"dotDarkColor":"hsla(var(--lia-bs-black-h), var(--lia-bs-black-s), var(--lia-bs-black-l), 0.2)","dotLightColor":"hsla(var(--lia-bs-white-h), var(--lia-bs-white-s), var(--lia-bs-white-l), 0.5)","barDarkColor":"hsla(var(--lia-bs-black-h), var(--lia-bs-black-s), var(--lia-bs-black-l), 0.06)","barLightColor":"hsla(var(--lia-bs-white-h), var(--lia-bs-white-s), var(--lia-bs-white-l), 0.4)","__typename":"LoadingThemeSettings"},"link":{"color":"var(--lia-bs-primary)","hoverColor":"hsl(var(--lia-bs-primary-h), var(--lia-bs-primary-s), calc(var(--lia-bs-primary-l) - 10%))","decoration":"none","hoverDecoration":"underline","__typename":"LinkThemeSettings"},"listGroup":{"itemPaddingY":"15px","itemPaddingX":"15px","borderColor":"var(--lia-bs-gray-300)","__typename":"ListGroupThemeSettings"},"modal":{"contentTextColor":"var(--lia-bs-body-color)","contentBg":"var(--lia-bs-white)","backgroundBg":"var(--lia-bs-black)","smSize":"440px","mdSize":"760px","lgSize":"1080px","backdropOpacity":0.3,"contentBoxShadowXs":"var(--lia-bs-box-shadow-sm)","contentBoxShadow":"var(--lia-bs-box-shadow)","headerFontWeight":"700","__typename":"ModalThemeSettings"},"navbar":{"position":"FIXED","background":{"attachment":null,"clip":null,"color":"var(--lia-bs-white)","imageAssetName":null,"imageLastModified":"0","origin":null,"position":"CENTER_CENTER","repeat":"NO_REPEAT","size":"COVER","__typename":"BackgroundProps"},"backgroundOpacity":0.8,"paddingTop":"15px","paddingBottom":"15px","borderBottom":"1px solid var(--lia-bs-border-color)","boxShadow":"var(--lia-bs-box-shadow-sm)","brandMarginRight":"30px","brandMarginRightSm":"10px","brandLogoHeight":"30px","linkGap":"10px","linkJustifyContent":"flex-start","linkPaddingY":"5px","linkPaddingX":"10px","linkDropdownPaddingY":"9px","linkDropdownPaddingX":"var(--lia-nav-link-px)","linkColor":"var(--lia-bs-body-color)","linkHoverColor":"var(--lia-bs-primary)","linkFontSize":"var(--lia-bs-font-size-sm)","linkFontStyle":"NORMAL","linkFontWeight":"400","linkTextTransform":"NONE","linkLetterSpacing":"normal","linkBorderRadius":"var(--lia-bs-border-radius-sm)","linkBgColor":"transparent","linkBgHoverColor":"transparent","linkBorder":"none","linkBorderHover":"none","linkBoxShadow":"none","linkBoxShadowHover":"none","linkTextBorderBottom":"none","linkTextBorderBottomHover":"none","dropdownPaddingTop":"10px","dropdownPaddingBottom":"15px","dropdownPaddingX":"10px","dropdownMenuOffset":"2px","dropdownDividerMarginTop":"10px","dropdownDividerMarginBottom":"10px","dropdownBorderColor":"hsla(var(--lia-bs-black-h), var(--lia-bs-black-s), var(--lia-bs-black-l), 0.08)","controllerBgHoverColor":"hsla(var(--lia-bs-black-h), var(--lia-bs-black-s), var(--lia-bs-black-l), 0.1)","controllerIconColor":"var(--lia-bs-body-color)","controllerIconHoverColor":"var(--lia-bs-body-color)","controllerTextColor":"var(--lia-nav-controller-icon-color)","controllerTextHoverColor":"var(--lia-nav-controller-icon-hover-color)","controllerHighlightColor":"hsla(30, 100%, 50%)","controllerHighlightTextColor":"var(--lia-yiq-light)","controllerBorderRadius":"var(--lia-border-radius-50)","hamburgerColor":"var(--lia-nav-controller-icon-color)","hamburgerHoverColor":"var(--lia-nav-controller-icon-color)","hamburgerBgColor":"transparent","hamburgerBgHoverColor":"transparent","hamburgerBorder":"none","hamburgerBorderHover":"none","collapseMenuMarginLeft":"20px","collapseMenuDividerBg":"var(--lia-nav-link-color)","collapseMenuDividerOpacity":0.16,"__typename":"NavbarThemeSettings"},"pager":{"textColor":"var(--lia-bs-link-color)","textFontWeight":"var(--lia-font-weight-md)","textFontSize":"var(--lia-bs-font-size-sm)","__typename":"PagerThemeSettings"},"panel":{"bgColor":"var(--lia-bs-white)","borderRadius":"var(--lia-bs-border-radius)","borderColor":"var(--lia-bs-border-color)","boxShadow":"none","__typename":"PanelThemeSettings"},"popover":{"arrowHeight":"8px","arrowWidth":"16px","maxWidth":"300px","minWidth":"100px","headerBg":"var(--lia-bs-white)","borderColor":"var(--lia-bs-border-color)","borderRadius":"var(--lia-bs-border-radius)","boxShadow":"0 0.5rem 1rem hsla(var(--lia-bs-black-h), var(--lia-bs-black-s), var(--lia-bs-black-l), 0.15)","__typename":"PopoverThemeSettings"},"prism":{"color":"#000000","bgColor":"#f5f2f0","fontFamily":"var(--font-family-monospace)","fontSize":"var(--lia-bs-font-size-base)","fontWeightBold":"var(--lia-bs-font-weight-bold)","fontStyleItalic":"italic","tabSize":2,"highlightColor":"#b3d4fc","commentColor":"#62707e","punctuationColor":"#6f6f6f","namespaceOpacity":"0.7","propColor":"#990055","selectorColor":"#517a00","operatorColor":"#906736","operatorBgColor":"hsla(0, 0%, 100%, 0.5)","keywordColor":"#0076a9","functionColor":"#d3284b","variableColor":"#c14700","__typename":"PrismThemeSettings"},"rte":{"bgColor":"var(--lia-bs-white)","borderRadius":"var(--lia-panel-border-radius)","boxShadow":" var(--lia-panel-box-shadow)","customColor1":"#bfedd2","customColor2":"#fbeeb8","customColor3":"#f8cac6","customColor4":"#eccafa","customColor5":"#c2e0f4","customColor6":"#2dc26b","customColor7":"#f1c40f","customColor8":"#e03e2d","customColor9":"#b96ad9","customColor10":"#3598db","customColor11":"#169179","customColor12":"#e67e23","customColor13":"#ba372a","customColor14":"#843fa1","customColor15":"#236fa1","customColor16":"#ecf0f1","customColor17":"#ced4d9","customColor18":"#95a5a6","customColor19":"#7e8c8d","customColor20":"#34495e","customColor21":"#000000","customColor22":"#ffffff","defaultMessageHeaderMarginTop":"14px","defaultMessageHeaderMarginBottom":"10px","defaultMessageItemMarginTop":"0","defaultMessageItemMarginBottom":"10px","diffAddedColor":"hsla(170, 53%, 51%, 0.4)","diffChangedColor":"hsla(43, 97%, 63%, 0.4)","diffNoneColor":"hsla(0, 0%, 80%, 0.4)","diffRemovedColor":"hsla(9, 74%, 47%, 0.4)","specialMessageHeaderMarginTop":"14px","specialMessageHeaderMarginBottom":"10px","specialMessageItemMarginTop":"0","specialMessageItemMarginBottom":"10px","__typename":"RteThemeSettings"},"tags":{"bgColor":"var(--lia-bs-gray-200)","bgHoverColor":"var(--lia-bs-gray-400)","borderRadius":"var(--lia-bs-border-radius-sm)","color":"var(--lia-bs-body-color)","hoverColor":"var(--lia-bs-body-color)","fontWeight":"var(--lia-font-weight-md)","fontSize":"var(--lia-font-size-xxs)","textTransform":"UPPERCASE","letterSpacing":"0.5px","__typename":"TagsThemeSettings"},"toasts":{"borderRadius":"var(--lia-bs-border-radius)","paddingX":"12px","__typename":"ToastsThemeSettings"},"typography":{"fontFamilyBase":"Atkinson Hyperlegible","fontStyleBase":"NORMAL","fontWeightBase":"400","fontWeightLight":"300","fontWeightNormal":"400","fontWeightMd":"500","fontWeightBold":"700","letterSpacingSm":"normal","letterSpacingXs":"normal","lineHeightBase":"1.3","fontSizeBase":"15px","fontSizeXxs":"11px","fontSizeXs":"12px","fontSizeSm":"13px","fontSizeLg":"20px","fontSizeXl":"24px","smallFontSize":"14px","customFonts":[],"__typename":"TypographyThemeSettings"},"unstyledListItem":{"marginBottomSm":"5px","marginBottomMd":"10px","marginBottomLg":"15px","marginBottomXl":"20px","marginBottomXxl":"25px","__typename":"UnstyledListItemThemeSettings"},"yiq":{"light":"#ffffff","dark":"#000000","__typename":"YiqThemeSettings"},"colorLightness":{"primaryDark":0.36,"primaryLight":0.74,"primaryLighter":0.89,"primaryLightest":0.95,"infoDark":0.39,"infoLight":0.72,"infoLighter":0.85,"infoLightest":0.93,"successDark":0.24,"successLight":0.62,"successLighter":0.8,"successLightest":0.91,"warningDark":0.39,"warningLight":0.68,"warningLighter":0.84,"warningLightest":0.93,"dangerDark":0.41,"dangerLight":0.72,"dangerLighter":0.89,"dangerLightest":0.95,"__typename":"ColorLightnessThemeSettings"},"localOverride":false,"__typename":"Theme"},"localOverride":false},"CachedAsset:text:en_US-shared/client/components/common/Loading/LoadingDot-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-shared/client/components/common/Loading/LoadingDot-1744046272649","value":{"title":"Loading..."},"localOverride":false},"CachedAsset:text:en_US-components/common/EmailVerification-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/common/EmailVerification-1744046272649","value":{"email.verification.title":"Email Verification Required","email.verification.message.update.email":"To participate in the community, you must first verify your email address. The verification email was sent to {email}. To change your email, visit My Settings.","email.verification.message.resend.email":"To participate in the community, you must first verify your email address. The verification email was sent to {email}. Resend email."},"localOverride":false},"CachedAsset:text:en_US-pages/tags/TagPage-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-pages/tags/TagPage-1744046272649","value":{"tagPageTitle":"Tag:\"{tagName}\" | {communityTitle}","tagPageForNodeTitle":"Tag:\"{tagName}\" in \"{title}\" | {communityTitle}","name":"Tags Page","tag":"Tag: {tagName}"},"localOverride":false},"AssociatedImage:{\"url\":\"https://community.f5.com/t5/s/zihoc95639/images/bi0xMTEtbGVaU3k3?image-coordinates=0%2C0%2C192%2C192\"}":{"__typename":"AssociatedImage","url":"https://community.f5.com/t5/s/zihoc95639/images/bi0xMTEtbGVaU3k3?image-coordinates=0%2C0%2C192%2C192","mimeType":"image/png"},"Category:category:Articles":{"__typename":"Category","id":"category:Articles","entityType":"CATEGORY","displayId":"Articles","nodeType":"category","depth":1,"title":"Articles","shortTitle":"Articles","parent":{"__ref":"Category:category:top"},"categoryPolicies":{"__typename":"CategoryPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Category:category:top":{"__typename":"Category","id":"category:top","displayId":"top","nodeType":"category","depth":0,"title":"Top"},"Tkb:board:security-insights":{"__typename":"Tkb","id":"board:security-insights","entityType":"TKB","displayId":"security-insights","nodeType":"board","depth":2,"conversationStyle":"TKB","title":"Security Insights","description":"From F5 SIRT and F5 Labs - expert analysis, industry updates, cybersecurity trends, and tips to help protect your digital assets.","avatar":{"__ref":"AssociatedImage:{\"url\":\"https://community.f5.com/t5/s/zihoc95639/images/bi0xMTEtbGVaU3k3?image-coordinates=0%2C0%2C192%2C192\"}"},"profileSettings":{"__typename":"ProfileSettings","language":null},"parent":{"__ref":"Category:category:Articles"},"ancestors":{"__typename":"CoreNodeConnection","edges":[{"__typename":"CoreNodeEdge","node":{"__ref":"Community:community:zihoc95639"}},{"__typename":"CoreNodeEdge","node":{"__ref":"Category:category:Articles"}}]},"userContext":{"__typename":"NodeUserContext","canAddAttachments":false,"canUpdateNode":false,"canPostMessages":false,"isSubscribed":false},"boardPolicies":{"__typename":"BoardPolicies","canPublishArticleOnCreate":{"__typename":"PolicyResult","failureReason":{"__typename":"FailureReason","message":"error.lithium.policies.forums.policy_can_publish_on_create_workflow_action.accessDenied","key":"error.lithium.policies.forums.policy_can_publish_on_create_workflow_action.accessDenied","args":[]}},"canReadNode":{"__typename":"PolicyResult","failureReason":null}},"tkbPolicies":{"__typename":"TkbPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}},"shortTitle":"Security Insights","tagPolicies":{"__typename":"TagPolicies","canSubscribeTagOnNode":{"__typename":"PolicyResult","failureReason":{"__typename":"FailureReason","message":"error.lithium.policies.labels.action.corenode.subscribe_labels.allow.accessDenied","key":"error.lithium.policies.labels.action.corenode.subscribe_labels.allow.accessDenied","args":[]}},"canManageTagDashboard":{"__typename":"PolicyResult","failureReason":{"__typename":"FailureReason","message":"error.lithium.policies.labels.action.corenode.admin_labels.allow.accessDenied","key":"error.lithium.policies.labels.action.corenode.admin_labels.allow.accessDenied","args":[]}}}},"CachedAsset:quilt:f5.prod:pages/tags/TagPage:board:security-insights-1744046272650":{"__typename":"CachedAsset","id":"quilt:f5.prod:pages/tags/TagPage:board:security-insights-1744046272650","value":{"id":"TagPage","container":{"id":"Common","headerProps":{"removeComponents":["community.widget.bannerWidget"],"__typename":"QuiltContainerSectionProps"},"items":[{"id":"tag-header-widget","layout":"ONE_COLUMN","bgColor":"var(--lia-bs-white)","showBorder":"BOTTOM","sectionEditLevel":"LOCKED","columnMap":{"main":[{"id":"tags.widget.TagsHeaderWidget","__typename":"QuiltComponent"}],"__typename":"OneSectionColumns"},"__typename":"OneColumnQuiltSection"},{"id":"messages-list-for-tag-widget","layout":"ONE_COLUMN","columnMap":{"main":[{"id":"messages.widget.messageListForNodeByRecentActivityWidget","props":{"viewVariant":{"type":"inline","props":{"useUnreadCount":true,"useViewCount":true,"useAuthorLogin":true,"clampBodyLines":3,"useAvatar":true,"useBoardIcon":false,"useKudosCount":true,"usePreviewMedia":true,"useTags":false,"useNode":true,"useNodeLink":true,"useTextBody":true,"truncateBodyLength":-1,"useBody":true,"useRepliesCount":true,"useSolvedBadge":true,"timeStampType":"conversation.lastPostingActivityTime","useMessageTimeLink":true,"clampSubjectLines":2}},"panelType":"divider","useTitle":false,"hideIfEmpty":false,"pagerVariant":{"type":"loadMore"},"style":"list","showTabs":true,"tabItemMap":{"default":{"mostRecent":true,"mostRecentUserContent":false,"newest":false},"additional":{"mostKudoed":true,"mostViewed":true,"mostReplies":false,"noReplies":false,"noSolutions":false,"solutions":false}}},"__typename":"QuiltComponent"}],"__typename":"OneSectionColumns"},"__typename":"OneColumnQuiltSection"}],"__typename":"QuiltContainer"},"__typename":"Quilt"},"localOverride":false},"CachedAsset:quiltWrapper:f5.prod:Common:1743758507223":{"__typename":"CachedAsset","id":"quiltWrapper:f5.prod:Common:1743758507223","value":{"id":"Common","header":{"backgroundImageProps":{"assetName":"header.jpg","backgroundSize":"COVER","backgroundRepeat":"NO_REPEAT","backgroundPosition":"LEFT_CENTER","lastModified":"1702932449000","__typename":"BackgroundImageProps"},"backgroundColor":"transparent","items":[{"id":"custom.widget.Beta_MetaNav","props":{"widgetVisibility":"signedInOrAnonymous","useTitle":true,"useBackground":false,"title":"","lazyLoad":false},"__typename":"QuiltComponent"},{"id":"community.widget.navbarWidget","props":{"showUserName":false,"showRegisterLink":true,"style":{"boxShadow":"var(--lia-bs-box-shadow-sm)","linkFontWeight":"700","controllerHighlightColor":"hsla(30, 100%, 50%)","dropdownDividerMarginBottom":"10px","hamburgerBorderHover":"none","linkFontSize":"15px","linkBoxShadowHover":"none","backgroundOpacity":0.4,"controllerBorderRadius":"var(--lia-border-radius-50)","hamburgerBgColor":"transparent","linkTextBorderBottom":"none","hamburgerColor":"var(--lia-nav-controller-icon-color)","brandLogoHeight":"48px","linkLetterSpacing":"normal","linkBgHoverColor":"transparent","collapseMenuDividerOpacity":0.16,"paddingBottom":"10px","dropdownPaddingBottom":"15px","dropdownMenuOffset":"2px","hamburgerBgHoverColor":"transparent","borderBottom":"0","hamburgerBorder":"none","dropdownPaddingX":"10px","brandMarginRightSm":"10px","linkBoxShadow":"none","linkJustifyContent":"center","linkColor":"var(--lia-bs-primary)","collapseMenuDividerBg":"var(--lia-nav-link-color)","dropdownPaddingTop":"10px","controllerHighlightTextColor":"var(--lia-yiq-dark)","background":{"imageAssetName":"","color":"var(--lia-bs-white)","size":"COVER","repeat":"NO_REPEAT","position":"CENTER_CENTER","imageLastModified":""},"linkBorderRadius":"var(--lia-bs-border-radius-sm)","linkHoverColor":"var(--lia-bs-primary)","position":"FIXED","linkBorder":"none","linkTextBorderBottomHover":"2px solid #0C5C8D","brandMarginRight":"30px","hamburgerHoverColor":"var(--lia-nav-controller-icon-color)","linkBorderHover":"none","collapseMenuMarginLeft":"20px","linkFontStyle":"NORMAL","linkPaddingX":"10px","paddingTop":"10px","linkPaddingY":"5px","linkTextTransform":"NONE","dropdownBorderColor":"hsla(var(--lia-bs-black-h), var(--lia-bs-black-s), var(--lia-bs-black-l), 0.08)","controllerBgHoverColor":"hsla(var(--lia-bs-black-h), var(--lia-bs-black-s), var(--lia-bs-black-l), 0.1)","linkDropdownPaddingX":"var(--lia-nav-link-px)","linkBgColor":"transparent","linkDropdownPaddingY":"9px","controllerIconColor":"#0C5C8D","dropdownDividerMarginTop":"10px","linkGap":"10px","controllerIconHoverColor":"#0C5C8D"},"links":{"sideLinks":[],"mainLinks":[{"children":[{"linkType":"INTERNAL","id":"migrated-link-1","params":{"boardId":"TechnicalForum","categoryId":"Forums"},"routeName":"ForumBoardPage"},{"linkType":"INTERNAL","id":"migrated-link-2","params":{"boardId":"WaterCooler","categoryId":"Forums"},"routeName":"ForumBoardPage"}],"linkType":"INTERNAL","id":"migrated-link-0","params":{"categoryId":"Forums"},"routeName":"CategoryPage"},{"children":[{"linkType":"INTERNAL","id":"migrated-link-4","params":{"boardId":"codeshare","categoryId":"CrowdSRC"},"routeName":"TkbBoardPage"},{"linkType":"INTERNAL","id":"migrated-link-5","params":{"boardId":"communityarticles","categoryId":"CrowdSRC"},"routeName":"TkbBoardPage"}],"linkType":"INTERNAL","id":"migrated-link-3","params":{"categoryId":"CrowdSRC"},"routeName":"CategoryPage"},{"children":[{"linkType":"INTERNAL","id":"migrated-link-7","params":{"boardId":"TechnicalArticles","categoryId":"Articles"},"routeName":"TkbBoardPage"},{"linkType":"INTERNAL","id":"article-series","params":{"boardId":"article-series","categoryId":"Articles"},"routeName":"TkbBoardPage"},{"linkType":"INTERNAL","id":"security-insights","params":{"boardId":"security-insights","categoryId":"Articles"},"routeName":"TkbBoardPage"},{"linkType":"INTERNAL","id":"migrated-link-8","params":{"boardId":"DevCentralNews","categoryId":"Articles"},"routeName":"TkbBoardPage"}],"linkType":"INTERNAL","id":"migrated-link-6","params":{"categoryId":"Articles"},"routeName":"CategoryPage"},{"children":[{"linkType":"INTERNAL","id":"migrated-link-10","params":{"categoryId":"CommunityGroups"},"routeName":"CategoryPage"},{"linkType":"INTERNAL","id":"migrated-link-11","params":{"categoryId":"F5-Groups"},"routeName":"CategoryPage"}],"linkType":"INTERNAL","id":"migrated-link-9","params":{"categoryId":"GroupsCategory"},"routeName":"CategoryPage"},{"children":[],"linkType":"INTERNAL","id":"migrated-link-12","params":{"boardId":"Events","categoryId":"top"},"routeName":"EventBoardPage"},{"children":[],"linkType":"INTERNAL","id":"migrated-link-13","params":{"boardId":"Suggestions","categoryId":"top"},"routeName":"IdeaBoardPage"},{"children":[],"linkType":"EXTERNAL","id":"Common-external-link","url":"https://community.f5.com/c/how-do-i","target":"SELF"}]},"className":"QuiltComponent_lia-component-edit-mode__lQ9Z6","showSearchIcon":false},"__typename":"QuiltComponent"},{"id":"community.widget.bannerWidget","props":{"backgroundColor":"transparent","visualEffects":{"showBottomBorder":false},"backgroundImageProps":{"backgroundSize":"COVER","backgroundPosition":"CENTER_CENTER","backgroundRepeat":"NO_REPEAT"},"fontColor":"#222222"},"__typename":"QuiltComponent"},{"id":"community.widget.breadcrumbWidget","props":{"backgroundColor":"var(--lia-bs-primary)","linkHighlightColor":"#FFFFFF","visualEffects":{"showBottomBorder":false},"backgroundOpacity":60,"linkTextColor":"#FFFFFF"},"__typename":"QuiltComponent"}],"__typename":"QuiltWrapperSection"},"footer":{"backgroundImageProps":{"assetName":null,"backgroundSize":"COVER","backgroundRepeat":"NO_REPEAT","backgroundPosition":"CENTER_CENTER","lastModified":null,"__typename":"BackgroundImageProps"},"backgroundColor":"var(--lia-bs-body-color)","items":[{"id":"custom.widget.Beta_Footer","props":{"widgetVisibility":"signedInOrAnonymous","useTitle":true,"useBackground":false,"title":"","lazyLoad":false},"__typename":"QuiltComponent"},{"id":"custom.widget.Tag_Manager_Helper","props":{"widgetVisibility":"signedInOrAnonymous","useTitle":true,"useBackground":false,"title":"","lazyLoad":false},"__typename":"QuiltComponent"},{"id":"custom.widget.Consent_Blackbar","props":{"widgetVisibility":"signedInOrAnonymous","useTitle":true,"useBackground":false,"title":"","lazyLoad":false},"__typename":"QuiltComponent"}],"__typename":"QuiltWrapperSection"},"__typename":"QuiltWrapper","localOverride":false},"localOverride":false},"CachedAsset:text:en_US-components/common/ActionFeedback-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/common/ActionFeedback-1744046272649","value":{"joinedGroupHub.title":"Welcome","joinedGroupHub.message":"You are now a member of this group and are subscribed to updates.","groupHubInviteNotFound.title":"Invitation Not Found","groupHubInviteNotFound.message":"Sorry, we could not find your invitation to the group. The owner may have canceled the invite.","groupHubNotFound.title":"Group Not Found","groupHubNotFound.message":"The grouphub you tried to join does not exist. It may have been deleted.","existingGroupHubMember.title":"Already Joined","existingGroupHubMember.message":"You are already a member of this group.","accountLocked.title":"Account Locked","accountLocked.message":"Your account has been locked due to multiple failed attempts. Try again in {lockoutTime} minutes.","editedGroupHub.title":"Changes Saved","editedGroupHub.message":"Your group has been updated.","leftGroupHub.title":"Goodbye","leftGroupHub.message":"You are no longer a member of this group and will not receive future updates.","deletedGroupHub.title":"Deleted","deletedGroupHub.message":"The group has been deleted.","groupHubCreated.title":"Group Created","groupHubCreated.message":"{groupHubName} is ready to use","accountClosed.title":"Account Closed","accountClosed.message":"The account has been closed and you will now be redirected to the homepage","resetTokenExpired.title":"Reset Password Link has Expired","resetTokenExpired.message":"Try resetting your password again","invalidUrl.title":"Invalid URL","invalidUrl.message":"The URL you're using is not recognized. Verify your URL and try again.","accountClosedForUser.title":"Account Closed","accountClosedForUser.message":"{userName}'s account is closed","inviteTokenInvalid.title":"Invitation Invalid","inviteTokenInvalid.message":"Your invitation to the community has been canceled or expired.","inviteTokenError.title":"Invitation Verification Failed","inviteTokenError.message":"The url you are utilizing is not recognized. Verify your URL and try again","pageNotFound.title":"Access Denied","pageNotFound.message":"You do not have access to this area of the community or it doesn't exist","eventAttending.title":"Responded as Attending","eventAttending.message":"You'll be notified when there's new activity and reminded as the event approaches","eventInterested.title":"Responded as Interested","eventInterested.message":"You'll be notified when there's new activity and reminded as the event approaches","eventNotFound.title":"Event Not Found","eventNotFound.message":"The event you tried to respond to does not exist.","redirectToRelatedPage.title":"Showing Related Content","redirectToRelatedPageForBaseUsers.title":"Showing Related Content","redirectToRelatedPageForBaseUsers.message":"The content you are trying to access is archived","redirectToRelatedPage.message":"The content you are trying to access is archived","relatedUrl.archivalLink.flyoutMessage":"The content you are trying to access is archived View Archived Content"},"localOverride":false},"CachedAsset:component:custom.widget.Beta_MetaNav-en-1743758613204":{"__typename":"CachedAsset","id":"component:custom.widget.Beta_MetaNav-en-1743758613204","value":{"component":{"id":"custom.widget.Beta_MetaNav","template":{"id":"Beta_MetaNav","markupLanguage":"HANDLEBARS","style":null,"texts":null,"defaults":{"config":{"applicablePages":[],"description":"MetaNav menu at the top of every page.","fetchedContent":null,"__typename":"ComponentConfiguration"},"props":[],"__typename":"ComponentProperties"},"components":[{"id":"custom.widget.Beta_MetaNav","form":null,"config":null,"props":[],"__typename":"Component"}],"grouping":"CUSTOM","__typename":"ComponentTemplate"},"properties":{"config":{"applicablePages":[],"description":"MetaNav menu at the top of every page.","fetchedContent":null,"__typename":"ComponentConfiguration"},"props":[],"__typename":"ComponentProperties"},"form":null,"__typename":"Component","localOverride":false},"globalCss":null,"form":null},"localOverride":false},"CachedAsset:component:custom.widget.Beta_Footer-en-1743758613204":{"__typename":"CachedAsset","id":"component:custom.widget.Beta_Footer-en-1743758613204","value":{"component":{"id":"custom.widget.Beta_Footer","template":{"id":"Beta_Footer","markupLanguage":"HANDLEBARS","style":null,"texts":null,"defaults":{"config":{"applicablePages":[],"description":"DevCentral´s custom footer.","fetchedContent":null,"__typename":"ComponentConfiguration"},"props":[],"__typename":"ComponentProperties"},"components":[{"id":"custom.widget.Beta_Footer","form":null,"config":null,"props":[],"__typename":"Component"}],"grouping":"CUSTOM","__typename":"ComponentTemplate"},"properties":{"config":{"applicablePages":[],"description":"DevCentral´s custom footer.","fetchedContent":null,"__typename":"ComponentConfiguration"},"props":[],"__typename":"ComponentProperties"},"form":null,"__typename":"Component","localOverride":false},"globalCss":null,"form":null},"localOverride":false},"CachedAsset:component:custom.widget.Tag_Manager_Helper-en-1743758613204":{"__typename":"CachedAsset","id":"component:custom.widget.Tag_Manager_Helper-en-1743758613204","value":{"component":{"id":"custom.widget.Tag_Manager_Helper","template":{"id":"Tag_Manager_Helper","markupLanguage":"HANDLEBARS","style":null,"texts":null,"defaults":{"config":{"applicablePages":[],"description":"Helper widget to inject Tag Manager scripts into head element","fetchedContent":null,"__typename":"ComponentConfiguration"},"props":[],"__typename":"ComponentProperties"},"components":[{"id":"custom.widget.Tag_Manager_Helper","form":null,"config":null,"props":[],"__typename":"Component"}],"grouping":"CUSTOM","__typename":"ComponentTemplate"},"properties":{"config":{"applicablePages":[],"description":"Helper widget to inject Tag Manager scripts into head element","fetchedContent":null,"__typename":"ComponentConfiguration"},"props":[],"__typename":"ComponentProperties"},"form":null,"__typename":"Component","localOverride":false},"globalCss":null,"form":null},"localOverride":false},"CachedAsset:component:custom.widget.Consent_Blackbar-en-1743758613204":{"__typename":"CachedAsset","id":"component:custom.widget.Consent_Blackbar-en-1743758613204","value":{"component":{"id":"custom.widget.Consent_Blackbar","template":{"id":"Consent_Blackbar","markupLanguage":"HTML","style":null,"texts":null,"defaults":{"config":{"applicablePages":[],"description":"","fetchedContent":null,"__typename":"ComponentConfiguration"},"props":[],"__typename":"ComponentProperties"},"components":[{"id":"custom.widget.Consent_Blackbar","form":null,"config":null,"props":[],"__typename":"Component"}],"grouping":"TEXTHTML","__typename":"ComponentTemplate"},"properties":{"config":{"applicablePages":[],"description":"","fetchedContent":null,"__typename":"ComponentConfiguration"},"props":[],"__typename":"ComponentProperties"},"form":null,"__typename":"Component","localOverride":false},"globalCss":null,"form":null},"localOverride":false},"CachedAsset:text:en_US-components/community/Breadcrumb-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/community/Breadcrumb-1744046272649","value":{"navLabel":"Breadcrumbs","dropdown":"Additional parent page navigation"},"localOverride":false},"CachedAsset:text:en_US-components/tags/TagsHeaderWidget-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/tags/TagsHeaderWidget-1744046272649","value":{"tag":"{tagName}","topicsCount":"{count} {count, plural, one {Topic} other {Topics}}"},"localOverride":false},"CachedAsset:text:en_US-components/messages/MessageListForNodeByRecentActivityWidget-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/messages/MessageListForNodeByRecentActivityWidget-1744046272649","value":{"title@userScope:other":"Recent Content","title@userScope:self":"Contributions","title@board:FORUM@userScope:other":"Recent Discussions","title@board:BLOG@userScope:other":"Recent Blogs","emptyDescription":"No content to show","MessageListForNodeByRecentActivityWidgetEditor.nodeScope.label":"Scope","title@instance:1706288370055":"Content Feed","title@instance:1743095186784":"Most Recent Updates","title@instance:1704317906837":"Content Feed","title@instance:1743095018194":"Most Recent Updates","title@instance:1702668293472":"Community Feed","title@instance:1743095117047":"Most Recent Updates","title@instance:1704319314827":"Blog Feed","title@instance:1743095235555":"Most Recent Updates","title@instance:1704320290851":"My Contributions","title@instance:1703720491809":"Forum Feed","title@instance:1743095311723":"Most Recent Updates","title@instance:1703028709746":"Group Content Feed","title@instance:VTsglH":"Content Feed"},"localOverride":false},"Category:category:Forums":{"__typename":"Category","id":"category:Forums","categoryPolicies":{"__typename":"CategoryPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Forum:board:TechnicalForum":{"__typename":"Forum","id":"board:TechnicalForum","forumPolicies":{"__typename":"ForumPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}},"boardPolicies":{"__typename":"BoardPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Forum:board:WaterCooler":{"__typename":"Forum","id":"board:WaterCooler","forumPolicies":{"__typename":"ForumPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}},"boardPolicies":{"__typename":"BoardPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Tkb:board:TechnicalArticles":{"__typename":"Tkb","id":"board:TechnicalArticles","tkbPolicies":{"__typename":"TkbPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}},"boardPolicies":{"__typename":"BoardPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Tkb:board:DevCentralNews":{"__typename":"Tkb","id":"board:DevCentralNews","tkbPolicies":{"__typename":"TkbPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}},"boardPolicies":{"__typename":"BoardPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Category:category:GroupsCategory":{"__typename":"Category","id":"category:GroupsCategory","categoryPolicies":{"__typename":"CategoryPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Category:category:F5-Groups":{"__typename":"Category","id":"category:F5-Groups","categoryPolicies":{"__typename":"CategoryPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Category:category:CommunityGroups":{"__typename":"Category","id":"category:CommunityGroups","categoryPolicies":{"__typename":"CategoryPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Occasion:board:Events":{"__typename":"Occasion","id":"board:Events","boardPolicies":{"__typename":"BoardPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}},"occasionPolicies":{"__typename":"OccasionPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Idea:board:Suggestions":{"__typename":"Idea","id":"board:Suggestions","boardPolicies":{"__typename":"BoardPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}},"ideaPolicies":{"__typename":"IdeaPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Category:category:CrowdSRC":{"__typename":"Category","id":"category:CrowdSRC","categoryPolicies":{"__typename":"CategoryPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Tkb:board:codeshare":{"__typename":"Tkb","id":"board:codeshare","tkbPolicies":{"__typename":"TkbPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}},"boardPolicies":{"__typename":"BoardPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Tkb:board:communityarticles":{"__typename":"Tkb","id":"board:communityarticles","tkbPolicies":{"__typename":"TkbPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}},"boardPolicies":{"__typename":"BoardPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Tkb:board:article-series":{"__typename":"Tkb","id":"board:article-series","tkbPolicies":{"__typename":"TkbPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}},"boardPolicies":{"__typename":"BoardPolicies","canReadNode":{"__typename":"PolicyResult","failureReason":null}}},"Conversation:conversation:338873":{"__typename":"Conversation","id":"conversation:338873","topic":{"__typename":"TkbTopicMessage","uid":338873},"lastPostingActivityTime":"2025-02-26T13:27:59.450-08:00","solved":false},"User:user:56757":{"__typename":"User","uid":56757,"login":"Jordan_Zebor","registrationData":{"__typename":"RegistrationData","status":null},"deleted":false,"avatar":{"__typename":"UserAvatar","url":"https://community.f5.com/t5/s/zihoc95639/images/dS01Njc1Ny0yMjQwNGkxRjU4NUFCNzdBRjYzQTMz"},"id":"user:56757"},"TkbTopicMessage:message:338873":{"__typename":"TkbTopicMessage","subject":"A Closer Look at mTLS and the Default Server in F5 NGINX","conversation":{"__ref":"Conversation:conversation:338873"},"id":"message:338873","revisionNum":15,"uid":338873,"depth":0,"board":{"__ref":"Tkb:board:security-insights"},"author":{"__ref":"User:user:56757"},"teaser@stripHtml({\"removeProcessingText\":true,\"truncateLength\":-1})":"","introduction":"","metrics":{"__typename":"MessageMetrics","views":120},"postTime":"2025-02-11T13:00:50.932-08:00","lastPublishTime":"2025-02-26T13:27:59.450-08:00","body@stripHtml({\"removeProcessingText\":true,\"removeSpoilerMarkup\":true,\"removeTocMarkup\":true,\"truncateLength\":-1})":" When you connect to an HTTPS site, your browser (or other client) typically sends a Server Name Indication (SNI)—the hostname it wants to reach—during the TLS handshake. This lets F5 NGINX figure out which cryptographic settings to use for that specific hostname. In other words, SNI influences: \n \n Which x509 certificate is sent to the client \n Which cryptographic algorithms are offered \n Which session ticket key is used for encrypting and decrypting session tickets \n Which session cache is active, if you’re using caching \n Which Certificate Authority (CA) is checked when you require mutual TLS (mTLS) \n \n If the client doesn’t provide SNI or if the hostname doesn’t match any of your configured server_name directives, F5 NGINX defaults to a “fallback” setup—usually called the default server. That means: \n \n The default server’s certificate, ciphers, ticket key, and session cache get used automatically. \n If you haven’t explicitly marked any server block as default_server, F5 NGINX chooses the first block for that listen socket in your configuration as the fallback. \n \n Here’s the crucial detail: once the TLS handshake finishes and a certificate has been selected (for example, from the default server), F5 NGINX will still examine the HTTP Host header for request routing. If it specifies a different domain matching another server block, the request is forwarded there at the HTTP layer. From the client’s perspective, however, the originally cryptographic settings remain in effect, because the TLS negotiation is already complete. \n \n Single Server Block \n In the simplest configuration, only one server block listens for TLS connections on a given IP address and port: \n server {\n listen 443 ssl;\n server_name example.com;\n ssl_certificate /etc/ssl/certs/example.com.crt;\n ssl_certificate_key /etc/ssl/private/example.com.key;\n ssl_client_certificate /etc/ssl/certs/ca.crt;\n ssl_verify_client on;\n\n # Additional configuration, such as locations and logging\n}\n \n \n In this example: \n \n If the client provides SNI matching example.com, F5 NGINX presents /etc/ssl/certs/example.com.crt and verifies the client certificate against /etc/ssl/certs/ca.crt. \n If the client does not provide SNI, this same server block still handles the request because there are no other blocks to consider; the same certificate and CA (ca.crt) apply. \n Once authenticated, the client proceeds under the cryptographic settings of this single server block. With only one server block present, there is no additional routing or fallback scenario to manage. \n \n \n Multiple Server Blocks on the Same IP/Port \n When multiple server blocks listen on the same IP address and port, F5 NGINX uses SNI to determine which server block should handle the request. If no matching SNI is found, requests fall back to the server marked with default_server. As previously stated, if the default_server is not explicitly defined, F5 NGINX will use the first server block in the configuration as the fallback. \n # example.com and the default server (first in config)\nserver {\n listen 443 ssl;\n server_name example.com;\n ssl_certificate /etc/ssl/certs/example.com.crt;\n ssl_certificate_key /etc/ssl/private/example.com.key;\n ssl_client_certificate /etc/ssl/certs/ca_A.crt;\n ssl_verify_client on;\n # Additional configuration, such as locations and logging\n\n}\n\n# www.example.com\nserver {\n listen 443 ssl;\n server_name www.example.com;\n ssl_certificate /etc/ssl/certs/www.example.com.crt;\n ssl_certificate_key /etc/ssl/private/www.example.com.key;\n ssl_client_certificate /etc/ssl/certs/ca_B.crt;\n ssl_verify_client on;\n\n # Additional configuration, such as locations and logging\n}\n \n \n In this example: \n \n If the client provides SNI matching example.com, the first server block’s certificate (example.com.crt) and CA settings (ca_A.crt) are used. \n If the client provides SNI matching www.example.com, the second server block’s certificate (www.example.com.crt) and CA settings (ca_B.crt) are used. \n If the client does not provide SNI (or provides an unmatched server name), the first server block (example.com) acts as the default. Its certificate (example.com.crt) and CA (ca_A.crt) apply for the TLS handshake. \n After TLS is established under the default server, if the HTTP Host header is www.example.com, F5 NGINX routes the request to the second server block for application-level processing. However, the TLS session—including which certificate and CA were used—remains with the default server’s settings. This means the second server’s client certificate configuration (ca_B.crt) is not involved in re-validating the client, since no new TLS handshake occurs. \n \n \n Recommendations \n The fallback behavior mentioned above might not fit all use cases. If it poses a risk or doesn’t align with your security needs, consider reconfiguring F5 NGINX (e.g., setting up a stub default server or applying tighter mTLS rules) to restrict or eliminate this fallback path. \n Defining a Default Server (or Stub Default Server) It is highly recommended to define a default server in F5 NGINX. If you do not want to allow fallback for clients without valid SNI, you can set up a stub default server (configuration example below). \n A stub default server, as shown below, ensures that unmatched SNI (or no SNI) connections are rejected at the handshake level, preventing unintended fallback to a less restrictive configuration. Perhaps most importantly, it does not contain any client authentication configuration directives, forcing client authentication to occur in the most specific server blocks. In the example below I have added `ssl_verify_client off;` for illustrative purposes, however the setting of `off` is the default. Note: ssl_reject_handshake appeared in nginx version 1.19.4. For versions prior to that, one can define a server that simply returns the special 444 HTTP response code. \n Authorization Checks in All Server Blocks Even with a stub default server, all server blocks should implement authorization checks if they serve sensitive content. Because requests may be forwarded from the default server to a non-default server after decryption, every server block must enforce its own mTLS policies and check variables such as $ssl_client_s_dn or $ssl_client_i_dn (if you rely on client certificates) to ensure consistent and robust security across your deployment. \n # explicit default server\nserver {\n listen 443 ssl default_server;\n ssl_reject_handshake on;\n ssl_verify_client off;\n ssl_protocols TLSv1.2 TLSv1.3;\n}\n\n# example.com\nserver {\n listen 443 ssl;\n server_name example.com;\n ssl_certificate /etc/ssl/certs/example.com.crt;\n ssl_certificate_key /etc/ssl/private/example.com.key;\n ssl_client_certificate /etc/ssl/certs/ca_A.crt;\n ssl_verify_client on;\n\n # Check subject DN\n if ($ssl_client_s_dn !~ \"CN=TrustedClient_A,O=MyOrg\") {\n return 403;\n }\n # Check issuer DN (this may not be necessary for all deployments)\n if ($ssl_client_i_dn !~ \"CN=TrustedCA_A,O=MyOrg\") {\n return 403;\n }\n # Additional configuration, such as locations and logging\n}\n\n# This server block handles requests for www.example.com\nserver {\n listen 443 ssl;\n server_name www.example.com;\n ssl_certificate /etc/ssl/certs/www.example.com.crt;\n ssl_certificate_key /etc/ssl/private/www.example.com.key;\n ssl_client_certificate /etc/ssl/certs/ca_B.crt;\n ssl_verify_client on;\n \n # Check subject DN\n if ($ssl_client_s_dn !~ \"CN=TrustedClient_B,O=MyOrg\") {\n return 403;\n }\n # Check issuer DN (this may not be necessary for all deployments)\n if ($ssl_client_i_dn !~ \"CN=TrustedCA_B,O=MyOrg\") {\n return 403;\n }\n # Additional configuration, such as locations and logging\n}\n \n \n Conclusion \n In summary, working with multiple server blocks, SNI, and mTLS can make F5 NGINX setups more complex. Knowing precisely which server block handles the TLS handshake—particularly when there is no SNI or an unmatched name—helps maintain the desired security posture. Careful attention to these details keeps certificates and policies consistent for all client connections. \n ","body@stripHtml({\"removeProcessingText\":true,\"removeSpoilerMarkup\":true,\"removeTocMarkup\":true,\"truncateLength\":-1})@stringLength":"8326","kudosSumWeight":2,"repliesCount":0,"readOnly":false,"images":{"__typename":"AssociatedImageConnection","edges":[],"totalCount":0,"pageInfo":{"__typename":"PageInfo","hasNextPage":false,"endCursor":null,"hasPreviousPage":false,"startCursor":null}},"videos":{"__typename":"VideoConnection","edges":[],"totalCount":0,"pageInfo":{"__typename":"PageInfo","hasNextPage":false,"endCursor":null,"hasPreviousPage":false,"startCursor":null}}},"Conversation:conversation:334564":{"__typename":"Conversation","id":"conversation:334564","topic":{"__typename":"TkbTopicMessage","uid":334564},"lastPostingActivityTime":"2024-11-25T01:47:39.525-08:00","solved":false},"TkbTopicMessage:message:334564":{"__typename":"TkbTopicMessage","subject":"F5 NGINX HTTP Request Header Rules: What’s Permitted and What’s Not","conversation":{"__ref":"Conversation:conversation:334564"},"id":"message:334564","revisionNum":6,"uid":334564,"depth":0,"board":{"__ref":"Tkb:board:security-insights"},"author":{"__ref":"User:user:56757"},"teaser@stripHtml({\"removeProcessingText\":true,\"truncateLength\":-1})":"","introduction":"","metrics":{"__typename":"MessageMetrics","views":454},"postTime":"2024-11-21T10:41:54.376-08:00","lastPublishTime":"2024-11-21T10:42:06.830-08:00","body@stripHtml({\"removeProcessingText\":true,\"removeSpoilerMarkup\":true,\"removeTocMarkup\":true,\"truncateLength\":-1})":" When managing web servers like F5 NGINX, it's crucial to understand the rules that govern HTTP headers—particularly which characters are allowed or disallowed in both header names and values. HTTP headers play a vital role in the communication between a client and server, carrying essential metadata such as content type, length, and caching policies. NGINX strictly enforces these rules to ensure compliance with HTTP/1.1, HTTP/2, and HTTP/3 protocols. Misconfigured headers or the use of improper characters can lead to a range of issues, including security vulnerabilities, degraded performance, or even rejected requests. One common security threat, HTTP Request Smuggling, exploits desynchronization between devices involved in handling the request, such as frontends, caching servers, load balancers, and web servers. These attacks rely on inconsistencies in how each device parses the request, enabling malicious actors to inject hidden or split requests. \n This article outlines the allowed and disallowed characters in HTTP request headers as enforced by NGINX, which I compiled through code review, test case review and manual testing for HTTP Smuggling on NGINX version \"nginx/1.25.5 (nginx-plus-r32-p1)\". If I missed something please let me know by contacting the F5 SIRT. \n Allowed Characters \n Header Names \n \n Lowercase letters: (a-z) \n Uppercase letters: (A-Z)\n \n Allowed in HTTP/1.1 \n Disallowed in HTTP/2 and HTTP/3, which require lowercase. \n \n \n Digits: (0-9) \n Hyphen: (-) \n Underscore: (_) Allowed in all versions only if underscores_in_headers is enabled \n Colon: (:) Allowed only as a prefix in HTTP/2 and HTTP/3 pseudo headers. \n \n Header Values \n \n Printable ASCII characters: Characters from ! to ~, including digits, letters, punctuation, and symbols, are allowed. \n Space: (0x20) Allowed within the value. \n Horizontal Tab (HT): (0x09) Generally allowed within values but with exceptions in headers such as Content-Length and Host (details below). \n \n Disallowed Characters \n Header Names \n \n Control Characters: ASCII control characters (<= 0x20), including space and horizontal tab, are disallowed in header names. \n DEL (0x7f): The delete character is not allowed. \n Colon: (:) Disallowed in header names except for HTTP/2 and HTTP/3 pseudo headers. \n Uppercase Letters: (A-Z) Disallowed in HTTP/2 and HTTP/3 header names (must be lowercase). \n Special characters: Characters such as ()<>@,;:\\\"/[]?={} are implicitly disallowed as they don’t belong to any allowed category for header names. \n \n Header Values \n \n Null Character: (\\0) Disallowed in header values. \n Line Feed (LF): (0x0A) Not allowed within the value and used only to terminate headers. \n Carriage Return (CR): (0x0D) Not allowed within the value, used for header termination. \n Control Characters (<= 0x20) with special conditions for Horizontal Tab (HT): \n Horizontal Tab (HT, 0x09):\n \n Disallowed in the Host header value in HTTP/1. \n Disallowed in the pseudo-header values in HTTP/2 and HTTP/3. \n Disallowed in the Content-Length header value in HTTP/1. \n \n \n \n Summary \n This list of allowed and disallowed characters provides an overview of how NGINX handles HTTP headers across different protocol versions. While HTTP/1.1 is somewhat lenient with uppercase letters and certain characters, HTTP/2 and HTTP/3 enforce stricter validation rules, particularly for header names. Understanding these restrictions ensures your server configuration remains compliant with protocol specifications and avoids potential issues with malformed headers. ","body@stripHtml({\"removeProcessingText\":true,\"removeSpoilerMarkup\":true,\"removeTocMarkup\":true,\"truncateLength\":-1})@stringLength":"3604","kudosSumWeight":1,"repliesCount":1,"readOnly":false,"images":{"__typename":"AssociatedImageConnection","edges":[],"totalCount":0,"pageInfo":{"__typename":"PageInfo","hasNextPage":false,"endCursor":null,"hasPreviousPage":false,"startCursor":null}},"videos":{"__typename":"VideoConnection","edges":[],"totalCount":0,"pageInfo":{"__typename":"PageInfo","hasNextPage":false,"endCursor":null,"hasPreviousPage":false,"startCursor":null}}},"CachedAsset:text:en_US-components/community/Navbar-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/community/Navbar-1744046272649","value":{"community":"Community Home","inbox":"Inbox","manageContent":"Manage Content","tos":"Terms of Service","forgotPassword":"Forgot Password","themeEditor":"Theme Editor","edit":"Edit Navigation Bar","skipContent":"Skip to content","migrated-link-9":"Groups","migrated-link-7":"Technical Articles","migrated-link-8":"DevCentral News","migrated-link-1":"Technical Forum","migrated-link-10":"Community Groups","migrated-link-2":"Water Cooler","migrated-link-11":"F5 Groups","Common-external-link":"How Do I...?","migrated-link-0":"Forums","article-series":"Article Series","migrated-link-5":"Community Articles","migrated-link-6":"Articles","security-insights":"Security Insights","migrated-link-3":"CrowdSRC","migrated-link-4":"CodeShare","migrated-link-12":"Events","migrated-link-13":"Suggestions"},"localOverride":false},"CachedAsset:text:en_US-components/community/NavbarHamburgerDropdown-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/community/NavbarHamburgerDropdown-1744046272649","value":{"hamburgerLabel":"Side Menu"},"localOverride":false},"CachedAsset:text:en_US-components/community/BrandLogo-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/community/BrandLogo-1744046272649","value":{"logoAlt":"Khoros","themeLogoAlt":"Brand Logo"},"localOverride":false},"CachedAsset:text:en_US-components/community/NavbarTextLinks-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/community/NavbarTextLinks-1744046272649","value":{"more":"More"},"localOverride":false},"CachedAsset:text:en_US-components/authentication/AuthenticationLink-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/authentication/AuthenticationLink-1744046272649","value":{"title.login":"Sign In","title.registration":"Register","title.forgotPassword":"Forgot Password","title.multiAuthLogin":"Sign In"},"localOverride":false},"CachedAsset:text:en_US-components/nodes/NodeLink-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/nodes/NodeLink-1744046272649","value":{"place":"Place {name}"},"localOverride":false},"CachedAsset:text:en_US-components/tags/TagSubscriptionAction-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/tags/TagSubscriptionAction-1744046272649","value":{"success.follow.title":"Following Tag","success.unfollow.title":"Unfollowed Tag","success.follow.message.followAcrossCommunity":"You will be notified when this tag is used anywhere across the community","success.unfollowtag.message":"You will no longer be notified when this tag is used anywhere in this place","success.unfollowtagAcrossCommunity.message":"You will no longer be notified when this tag is used anywhere across the community","unexpected.error.title":"Error - Action Failed","unexpected.error.message":"An unidentified problem occurred during the action you took. Please try again later.","buttonTitle":"{isSubscribed, select, true {Unfollow} false {Follow} other{}}","unfollow":"Unfollow"},"localOverride":false},"CachedAsset:text:en_US-components/messages/MessageListTabs-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/messages/MessageListTabs-1744046272649","value":{"mostKudoed":"{value, select, IDEA {Most Votes} other {Most Likes}}","mostReplies":"Most Replies","mostViewed":"Most Viewed","newest":"{value, select, IDEA {Newest Ideas} OCCASION {Newest Events} other {Newest Topics}}","newestOccasions":"Newest Events","mostRecent":"Most Recent","noReplies":"No Replies Yet","noSolutions":"No Solutions Yet","solutions":"Solutions","mostRecentUserContent":"Most Recent","trending":"Trending","draft":"Drafts","spam":"Spam","abuse":"Abuse","moderation":"Moderation","tags":"Tags","PAST":"Past","UPCOMING":"Upcoming","sortBymostRecent":"Sort By Most Recent","sortBymostRecentUserContent":"Sort By Most Recent","sortBymostKudoed":"Sort By Most Likes","sortBymostReplies":"Sort By Most Replies","sortBymostViewed":"Sort By Most Viewed","sortBynewest":"Sort By Newest Topics","sortBynewestOccasions":"Sort By Newest Events","otherTabs":" Messages list in the {tab} for {conversationStyle}","guides":"Guides","archives":"Archives"},"localOverride":false},"CachedAsset:text:en_US-shared/client/components/common/QueryHandler-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-shared/client/components/common/QueryHandler-1744046272649","value":{"title":"Query Handler"},"localOverride":false},"CachedAsset:text:en_US-components/community/NavbarDropdownToggle-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/community/NavbarDropdownToggle-1744046272649","value":{"ariaLabelClosed":"Press the down arrow to open the menu"},"localOverride":false},"CachedAsset:text:en_US-shared/client/components/common/OverflowNav-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-shared/client/components/common/OverflowNav-1744046272649","value":{"toggleText":"More"},"localOverride":false},"CachedAsset:text:en_US-components/messages/MessageView/MessageViewInline-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/messages/MessageView/MessageViewInline-1744046272649","value":{"bylineAuthor":"{bylineAuthor}","bylineBoard":"{bylineBoard}","anonymous":"Anonymous","place":"Place {bylineBoard}","gotoParent":"Go to parent {name}"},"localOverride":false},"CachedAsset:text:en_US-components/customComponent/CustomComponent-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/customComponent/CustomComponent-1744046272649","value":{"errorMessage":"Error rendering component id: {customComponentId}","bannerTitle":"Video provider requires cookies to play the video. Accept to continue or {url} it directly on the provider's site.","buttonTitle":"Accept","urlText":"watch"},"localOverride":false},"CachedAsset:text:en_US-components/users/UserLink-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/users/UserLink-1744046272649","value":{"authorName":"View Profile: {author}","anonymous":"Anonymous"},"localOverride":false},"CachedAsset:text:en_US-components/messages/MessageSubject-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/messages/MessageSubject-1744046272649","value":{"noSubject":"(no subject)"},"localOverride":false},"CachedAsset:text:en_US-components/messages/MessageBody-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/messages/MessageBody-1744046272649","value":{"showMessageBody":"Show More","mentionsErrorTitle":"{mentionsType, select, board {Board} user {User} message {Message} other {}} No Longer Available","mentionsErrorMessage":"The {mentionsType} you are trying to view has been removed from the community.","videoProcessing":"Video is being processed. Please try again in a few minutes.","bannerTitle":"Video provider requires cookies to play the video. Accept to continue or {url} it directly on the provider's site.","buttonTitle":"Accept","urlText":"watch"},"localOverride":false},"CachedAsset:text:en_US-components/messages/MessageTime-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/messages/MessageTime-1744046272649","value":{"postTime":"Published: {time}","lastPublishTime":"Last Update: {time}","conversation.lastPostingActivityTime":"Last posting activity time: {time}","conversation.lastPostTime":"Last post time: {time}","moderationData.rejectTime":"Rejected time: {time}"},"localOverride":false},"CachedAsset:text:en_US-shared/client/components/nodes/NodeIcon-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-shared/client/components/nodes/NodeIcon-1744046272649","value":{"contentType":"Content Type {style, select, FORUM {Forum} BLOG {Blog} TKB {Knowledge Base} IDEA {Ideas} OCCASION {Events} other {}} icon"},"localOverride":false},"CachedAsset:text:en_US-components/messages/MessageUnreadCount-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/messages/MessageUnreadCount-1744046272649","value":{"unread":"{count} unread","comments":"{count, plural, one { unread comment} other{ unread comments}}"},"localOverride":false},"CachedAsset:text:en_US-components/messages/MessageViewCount-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/messages/MessageViewCount-1744046272649","value":{"textTitle":"{count, plural,one {View} other{Views}}","views":"{count, plural, one{View} other{Views}}"},"localOverride":false},"CachedAsset:text:en_US-components/kudos/KudosCount-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/kudos/KudosCount-1744046272649","value":{"textTitle":"{count, plural,one {{messageType, select, IDEA{Vote} other{Like}}} other{{messageType, select, IDEA{Votes} other{Likes}}}}","likes":"{count, plural, one{like} other{likes}}"},"localOverride":false},"CachedAsset:text:en_US-components/messages/MessageRepliesCount-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-components/messages/MessageRepliesCount-1744046272649","value":{"textTitle":"{count, plural,one {{conversationStyle, select, IDEA{Comment} OCCASION{Comment} other{Reply}}} other{{conversationStyle, select, IDEA{Comments} OCCASION{Comments} other{Replies}}}}","comments":"{count, plural, one{Comment} other{Comments}}"},"localOverride":false},"CachedAsset:text:en_US-shared/client/components/users/UserAvatar-1744046272649":{"__typename":"CachedAsset","id":"text:en_US-shared/client/components/users/UserAvatar-1744046272649","value":{"altText":"{login}'s avatar","altTextGeneric":"User's avatar"},"localOverride":false}}}},"page":"/tags/TagPage/TagPage","query":{"nodeId":"board:security-insights","tagName":"NGINX"},"buildId":"q_bLpq2mflH0BeZigxpj6","runtimeConfig":{"buildInformationVisible":false,"logLevelApp":"info","logLevelMetrics":"info","openTelemetryClientEnabled":false,"openTelemetryConfigName":"f5","openTelemetryServiceVersion":"25.2.0","openTelemetryUniverse":"prod","openTelemetryCollector":"http://localhost:4318","openTelemetryRouteChangeAllowedTime":"5000","apolloDevToolsEnabled":false,"inboxMuteWipFeatureEnabled":false},"isFallback":false,"isExperimentalCompile":false,"dynamicIds":["./components/customComponent/CustomComponent/CustomComponent.tsx","./components/community/Navbar/NavbarWidget.tsx","./components/community/Breadcrumb/BreadcrumbWidget.tsx","./components/tags/TagsHeaderWidget/TagsHeaderWidget.tsx","./components/messages/MessageListForNodeByRecentActivityWidget/MessageListForNodeByRecentActivityWidget.tsx","./components/tags/TagSubscriptionAction/TagSubscriptionAction.tsx","./components/customComponent/CustomComponentContent/TemplateContent.tsx","../shared/client/components/common/List/ListGroup/ListGroup.tsx","./components/messages/MessageView/MessageView.tsx","./components/messages/MessageView/MessageViewInline/MessageViewInline.tsx","./components/customComponent/CustomComponentContent/HtmlContent.tsx","./components/customComponent/CustomComponentContent/CustomComponentScripts.tsx"],"appGip":true,"scriptLoader":[]}