Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

Yonatan_Talmor's avatar
Yonatan_Talmor
Icon for Nimbostratus rankNimbostratus
Aug 10, 2017

LTM networking issue:

HI There, a quick networking question: Two modes of networking are implemented in our BIG-IP v12.1.2 active/standby setup:   F5 as L3 of servers. With wildcad forwarding VS and forwarding fastL4...
big-ip
devops
LTM
Yonatan_Talmor's avatar
Yonatan_Talmor
Icon for Nimbostratus rankNimbostratus
Aug 13, 2017

So I just found the cause of the TCP reset. seems that SRC is getting the response from a modified DST TCP port, and not the addressed one. I still don't know what causes this. I suppose this is the key to the solution. thoughts?