Forum Discussion
VIP is not responding on SYN after enabling other modules like ASM, APM and AFM.
- Feb 13, 2026
Hi All,
Let's give a quick update regarding my issue for anybody that runs into the same issue.
My license was renewed so I could create a TAC case for my issue. TAC rebuild my system in their lab and found a DB value that was still enabled after deprovisioning AFM. See https://my.f5.com/manage/s/article/K16849 for more information.
Running the following command solved my issue: # tmsh modify /sys db tm.fw.defaultaction value accept
I'm still looking for information why I haven't found any log entries regarding this setting/dropped traffic.
Thanks all for your input.
A few days ago, I tried to open a tac case but apparently my support is expired. So that was a trigger it might be related to the license.
I tried the following:
- Clone the vm in esxi. Revoke the current lab license. Generate a new trial license and attach it to the cloned vm. Guess what?? Still nothing.... Same issue is present on the new trial license.
- Imported a new ovf file and did a backup restore to a new vm. Also needed to attach a new trial license. And still nothing... issues is carried in the backup as well.
- Imported a new ovf file and rebuilt the f5 from scratch manually. This is the only way to get things working with the additional modules. But because it's a trial, it's not ideal.
I'm actually lost where to look. It's something on that machine but I don't know what.
- ShyyDec 27, 2025
Cirrus
Even if you don't have license for provisioned modules it won't cause what you're having.
Never heard such issue before,
I created a lot of VM's never encountered such issue before.
might actually just be a problem with the VM image itself.
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