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

Forum Discussion

Koalan_365603's avatar
Koalan_365603
Icon for Nimbostratus rankNimbostratus
Sep 25, 2018

Empty reply from a server

Can anyone explain what does this "empty reply from a server" means   See an example:   [root@F5:Active:In Sync] config curl -i http://3.3.3.3:2037/docserver/inrotation.htmlcurl: (52) Empty re...
application delivery
big-ip
LTM
security
troubleshoot
Kevin_Stewart's avatar
Kevin_Stewart
Icon for Employee rankEmployee
Sep 25, 2018

I have to assume you've obfuscated your configuration here. Otherwise I'm not sure it makes sense that your pool member is 3.3.3.3:2037, and you're trying to access this through a VIP using the same IP:port. Normally the (client side) VIP would be on a separate IP (and usually separate subnet) from the internal servers.