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

Forum Discussion

Omer's avatar
Omer
Icon for Nimbostratus rankNimbostratus
May 06, 2020

F5 APM Failed to download configuration

Hi . My VPN clinet showing Disconnected with failed to download configuration error . Existing setup is :   F5 AWAF VE version 14.1.2.3 in front of APM . I have created LTM Virtual Server with po...
BIG-IP Access Policy Manager (APM)
security
delv3chio's avatar
delv3chio
Icon for Employee rankEmployee
May 07, 2020

Hello Omer,

 

When using ASM with APM, you will need to use the 'virtual' command in an iRule on the layered ASM VS to point at the APM VS.

This would not work with a pool member pointing at an APM VS due to how APM fires related to ASM in the hudchain.

 

Please review the following article:

 

K54217479: How to protect APM virtual server with ASM

Additionally, there is a little more in depth article using Brute Force Protection:

 

K13315545: Configuring a BIG-IP ASM virtual server to protect a BIG-IP APM login page with brute force prevention

 

Hope that helps!

Omer's avatar
Omer
Icon for Nimbostratus rankNimbostratus
May 07, 2020

Thank you for the suggestion . In my case issue was in HTTP profile . I bypassed some of pages through policy . APM and ASM are in separate boxes .