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

Forum Discussion

nshelton85's avatar
nshelton85
Icon for Altostratus rankAltostratus
Sep 14, 2018

Extracting specific information from an HTTP POST and logging it.

I am trying to log the IP address and usernames that are attempting to login to our web portal. I have the iRule mostly working, but I am having difficulty finding out how to extract certain pieces o...
application delivery
irules
LTM
security
PeteWhite's avatar
PeteWhite
Icon for Employee rankEmployee
Sep 14, 2018

The simplest way is to use findstr on the payload

set user [ findstr [HTTP::payload] "user=" 5 & ]

If you know where the text is then you can also use 

string range