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

Forum Discussion

Zuke's avatar
Zuke
Icon for Cirrostratus rankCirrostratus
Aug 21, 2020

Error connecting to virtual server (HTTP header count exceeded)

I have a new pre-prod HTTPS virtual server. One server in the pool, passing health checks, and the virtual server has zero iRules associated to it. When I run a curl request to the virtual server, t...
application delivery
big-ip
LTM
Zuke's avatar
Zuke
Icon for Cirrostratus rankCirrostratus
Aug 21, 2020

I created a custom HTTP profile for this application and put the header size up to 2048. I don't think my browser or CURL request is going to be adding a bunch of headers however.