iRules for recreation: HTTP Protocol Parser implemented using BIG-IP iRule(unfinished)
Hi, everyone in devcentral: I am currently using iRules to simulate the basic functions of an http profile. With this set of scripts, you can achieve similar functionality without needing to mount an http profile on Virtual Server. This set of scripts is only for learning iRules, HTTP, TCP, and related knowledge, and must not be used in a production environment. If there is a need for HTTP protocol parsing, please use the http profile. The current functions are not yet complete; additional features will be added later. Anyone interested are welcome to provide suggestions. GitHub - lfptss/http_protocol_parser · GitHub
How to add Syslog headers to Bot Defense logs over HSL? (Missing formatting options)
Hi DevCentral Community, I am running into issue with logging Bot Defense events to our SEIM (AIsaac) and could use some advice on best practices. We have logging profile configured to send both Application Security (ASM) and Bot Defense logs to a Remote Publisher. The Publisher is currently tied to a Remote HSL(High-Speed-Logging) destination. The Problem: For standard ASM WAF logs, we can easily format the log string directly in the GUI under the Applications Security logging tab. However, under the Bot Defense logging tab, there is no option to customize the log format. Because it is sending directly to a raw HSL destination, the Bot Defense logs are arriving at out SEIM completely stripped of standard Syslog headers. Without these headers, the SEIM cannot parse the logs correctly. My Questions: Is inserting a Syslog formatted destination before the HSL destination the official way to inject standard headers into Bot Defense logs? Is there any hidden tmsh command or iRule method to actually customize the Bot Defense log payload format, or is the payload structure strictly fixed by the system?Create Domino LTPA token on F5 problem
Hi, I'm trying to use the code at http://per.lausten.dk/blog/2009/06/how-to-create-a-ltpa-session-cookie-for-lotus-domino-using-f5.html to create a Domino LTPA token but I am getting the following error showing on the Domino server: Token does not lead with 0 [Single Sign-On token is invalid]. The token should begin with the version number 0123 e.g. from the code set ltpa_version "\x00\x01\x02\x03" However, after decoding the token and then looking at it in a hex editor the version number shows as: C0 80 01 02 03 ....... Can somebody explain to me why the \x00 is being changed to C0 80 please? I've experimented putting other numbers in thefirst position to see what happens e.g. \x01\x01\x02\x03 and the hex readout looks correct i.e. 01 01 02 03. It only fails when I use a \x00 in the first position. Thanks for any suggestions. JeffF5 AWAF/ASM ASM_RESPONSE_VIOLATION event seem to not trigger on 17.1.x
Hey Everyone, The F5 AWAF/ASM ASM_RESPONSE_VIOLATION event seem to not trigger on 17.1.x. I have enabled irules support the waf policy and I tested in Normal and Compatibility mode but no luck. The other events trigger without an issue. I created 2 custom signatures for response and request match and request match one has no issues so it seems a bug to me. This can be easily tested with the below irule that logs to /var/log/asm when ASM_REQUEST_DONE { log local3. "test request" } when ASM_RESPONSE_VIOLATION { log local3. "test response" } The custom response signature is in the policy to just trigger alarm. I tried string or regex match " (?i)failed " PCRE-style as F5 15.x and up are using this regex style.
How to log HTTP/2 reset_stream
Hello, We are currently in a meeting to prepare for HTTP/2 DDoS attacks. What we would like to do is log the client’s IP address (either local or remote) whenever an HTTP/2 RESET_STREAM is received. Is there any way to achieve this? Would it be possible to implement using an iRule? Thank you.
IRule to block different combinations host/uri
hello together, we've got a VIP with a lot of CNAME's and a few login-URI's should be blocked, but not all. so in our Irule we have some Entries like: elseif { [HTTP::uri] starts_with "/presse/login"} { HTTP::respond 403 but now we need special Combinations of [HTTP::host][HTTP::uri] could you pls provide me some Example? I'm not sure if [HTTP::host] matches alo for HTTPS. Thank you Karl
