VIP is not responding on SYN after enabling other modules like ASM, APM and AFM.
Hi all, I have an F5 VE running 17.5.1.3 in my lab environment for learning purposes. As back-end I installed the phpauction webpage and all configuration works flawlessly if only the LTM module is enabled. This in the most simple form: Virtual server on port 80. TCP profile HTTP profile Pool Automap When I add another module, for example ASM, the vip stopped working although it's still green/up and not even a security policy has been attached to the vip. Captures show that the SYN is reaching the F5 but I do not get a response from it: tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on any, link-type EN10MB (Ethernet), capture size 65535 bytes 16:24:51.691462 IP 192.168.1.100.64282 > 192.168.2.10.80: Flags [S], seq 5173934, win 65535, options [mss 1260,nop,wscale 8,nop,nop,sackOK], length 0 in slot1/tmm1 lis= port=1.1 trunk= 16:24:51.942738 IP 192.168.1.100.64625 > 192.168.2.10.80: Flags [S], seq 1642892817, win 65535, options [mss 1260,nop,wscale 8,nop,nop,sackOK], length 0 in slot1/tmm0 lis= port=1.1 trunk= I checked the back-end connection as well but the F5 is not sending out the SYN to the webserver. So it looks like it's blackholing my traffic. When I disable ASM and use only LTM, everything starts to work again. Even when trying with different modules like APM, the same issue happens. VIP is not responding after only enabling APM or AFM. I tried the following: - Factory reset the machine. - Upgrade to 17.5.1.3. - Enable RST CAUSE. (but there isn't any because the SYN isn't there in the first place) - Force reload config on the mcpd process. - Enabled ltm debugging without receiving any logs about the connection. - Looked into the dos and bot defense logs to see if traffic is dropped at an earlier point in the chain. - Enabled tmm debug without getting any relevant logs. - Changing the vip from standard to fastl4. - Remove http profile. I did play a lot with other modules as well like ASM, APM, AFM, SSLO, DNS, so that's why I though it was a configuration issue at first. But make the machine factory default, did not solve it. Is it possible there are some left overs during my learning path on this machine? Do you know what additional steps I can take to solve this issue? Thanks. Best regards, Mitchel
Cisco TACACS+ Config on ISE LTM Pair
I'm trying to add TACACS+ configuration to my ISE LTMs (v17.1.3). We use Active Directory for authentication. The problem is when I try to create the profile, the "type" dropdown does not show "TACACS+". APM is not provisioned either, not if that is needed. I provisioned it on our lab, but no help.
Connection Rest f5
I have box f5 i4800 version 15.1.5, we faced some issues , I have virtual server listen on https 443 then under it pool have one node listen on http port 80 and I used ssl client profile, when I try access VIP , I can't access it and faced connection rest , then check all setting for vip is ok , again try but I can't access , After that I delete this VIP and Create it again with the same setting and the same ssl client profile after that I can access Vip and application is working fine, so I think so that is bug of this version ,please advise me.
F5 HA deployment in Azure using Azure Load Balancer
I just created an HA 90 (Active/Standby) peer for one of our customers adding an F5 to their current stand alone infrastructure in Azure. We are using a 3-NIC deployment model using the external interface for the VIPs and the Internal for our HA peering. We are also using secondary IP addresses on the external NIC which are in turn used for the VIPs on the F5. ✔ 3-NIC BIG-IP deployment (Management, Internal, External) ✔ Secondary IPs on the external NIC ✔ Those secondary IPs are mapped to BIG-IP Virtual Servers (VIPs) ✔ Internal NIC is used only for HA sync (not for traffic) For redundancy I have suggested using CFE in for failover but the customer wants to use and Azure load balancer and having the F5s as backend pool members. They do not want to use CFE. Is it possible to deploy an F5 HA pair in Azure using an Azure Load Balancer while the VIPs are using secondary NICs on the external interface? I'm afraid using an ALB would require making changes to the current VIP configurations on F5 to support a wildcard. Any other HA deployment models within Azure given the current infrastructure would also be helpful. Thank You
Requirement for BIG-IQ VM Deployment in AWS
Can anyone please suggest on below. We have a requirement to deploy a BIG-IQ VM in the AWS cloud to manage our existing LTM, GTM, and WAF devices. We are planning to manage approximately 100 F5 devices using BIG-IQ. Could you please share the recommended system requirements (RAM and disk space) for the BIG-IQ instance to support this scale? and other details as well if required for the same. Kind regards
