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Forum Discussion

tjoll66's avatar
tjoll66
Icon for Nimbostratus rankNimbostratus
Dec 23, 2025

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 ...
application delivery
deployment
tjoll66's avatar
tjoll66
Icon for Nimbostratus rankNimbostratus
Dec 26, 2025

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:

  1. 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.
  2. 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.
  3. 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.

  • Shyy's avatar
    Shyy
    Icon for Cirrus rankCirrus
    Dec 27, 2025

    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.