Bug ID 522888: APM HTTP parser no longer requires CR LF to terminate lines, LF is sufficient

Last Modified: Oct 06, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP APM(all modules)

Known Affected Versions:

Fixed In:

Opened: May 12, 2015
Severity: 3-Major


Custom applications that create their own HTTP authentication requests that use LF alone for line endings will fail to authenticate.


Custom authentication tools may not authenticate against APM.


Authentication must come from a custom application. Browsers and other applications that follow the HTTP specification are not affected.


An iRule can process the incoming authentication requests and adjust the line endings.

Fix Information

The APM HTTP parser accepts either LF or CR LF for line termination.

Behavior Change