F5 is upgrading its customer support chat feature on My.F5.com. Chat support will be unavailable from 6am-10am PST on 1/20/26. Refer to K000159584 for details.

iRule to set SameSite for compatible clients and remove it for incompatible clients (LTM|ASM|APM)

A bunch of us have been refining approaches to help customers handle the new browser enforcement of the HTTP cookie SameSite attribute. I think we have a pretty solid approach now to handle compatib...
Published Feb 10, 2020
Version 1.0
application delivery
iRules
samesite
Simon_Kowallik's avatar
Simon_Kowallik
Icon for Employee rankEmployee
Aug 06, 2021

Hi ,

 

TMOS version 13.x doesn't support `HTTP::has_responded`, this command was introduced in TMOS version 14.1.

The below support article has detailed information about the background.

K23237429: TCL error: ERR_NOT_SUPPORTED after upgrade to version 14.1.0 or later

 

If this is the only iRule attached to the virtual server and you don't use LTM policies there is nothing to worry about. If you do, just check if any of the criteria applies to you and re-arrange the iRule code accordingly to be prepared for a later TMOS upgrade.

 

Regards

Simon