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

Forum Discussion

INEVITABLE_89's avatar
INEVITABLE_89
Icon for Nimbostratus rankNimbostratus
Apr 26, 2012

Passive FTP

Hi,     I have two servers behind the F5 having ports 4021 and 4022 configured for FTP.   VIP is configured with port 21.     When i am trying to get on to the servers (port 4022) direc...
security
syedimam_147051's avatar
syedimam_147051
Icon for Nimbostratus rankNimbostratus
Feb 26, 2016
How was your problem resolved. I am heaving same problem with port range of 50000-52500 and when server send the entering into passive mode command, F5 send the TCP Reset.