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

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RobS's avatar
RobS
Icon for Altostratus rankAltostratus
Dec 28, 2012

Custom HTTP monitor that checks for existence of an image

In looking through DevCentral and AskF5 I haven't found the exact scenario I am in. We have a brand new pair of 3900's running 11.2.1 and we are only doing basic load balancing for a new Blackboard e...
management
monitoring
RobS's avatar
RobS
Icon for Altostratus rankAltostratus
Dec 31, 2012

So after a little more testing, it seems to be happy with: GET /branding/_1_1/logo_uchc.gif HTTP/1.0 \r\n\r\n

 

The server directly responds to: GET /branding/_1_1/logo_uchc.gif HTTP/1.0 so I think HTTP/1.1 was the issue even though it appeared to work through the LTM.

 

Thanks for the help Steve!

 

Rob