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

Forum Discussion

Nagu_82025's avatar
Nagu_82025
Icon for Nimbostratus rankNimbostratus
Jan 30, 2019

Load balancing ipsec passthrough traffic

Hello I seen some questions regarding load balancing ipsec traffic through F5 LTM. The answer that were provided said it should work. The suggestion is to use a forwarding VS on the LTM. With forwa...
application delivery
big-ip
LTM
security
Rico's avatar
Rico
Icon for Cirrus rankCirrus
Jan 30, 2019

Forwarding Virtual Servers are designed to implement routing solutions through the F5. This is why it does not allow pools. The minimum configuration for a VS that allows load balancing would be a Performance L4 VS. This allows all TCP traffic to be load balanced but can be configured to simply pass through all the data and not parse it.

 

If you configure a performance L4 VS with a fastL4 profile and the HTTP profile set to None, I believe your issue will be solved.

 

If you have any more questions, I am sure I can help.