Forum Discussion

Aaron_33366's avatar
Aaron_33366
Icon for Nimbostratus rankNimbostratus
Mar 14, 2011

Wildcard cookie

Hello. I have migrated my config from a Cisco CSS to an F5 LTM and have run into a problem. One the CSS I was able to have a cookie that was use for all parts of the domain. I was able to set the o...
application delivery
dev
devops
iRules
hooleylist's avatar
hooleylist
Icon for Cirrostratus rankCirrostratus
Mar 15, 2011
You can set the domain on the persistence cookie that LTM sets from the cookie insert persistence profile. You don't need to set or modify the cookie value. 

when HTTP_RESPONSE {

   log local0. "[IP::client_addr]:[TCP::client_port]: Pre Set-Cookies: [HTTP::header values Set-Cookie]"

    Check if the persistence cookie exists in the response
   if {[HTTP::cookie exists "My_cookie"]} {
       set the domain attribute on the persistence cookie
      HTTP::cookie domain "My_cookie" ".mydomain.com"
      log local0. "[IP::client_addr]:[TCP::client_port]: Modified domain on My_cookie"
    }
   log local0. "[IP::client_addr]:[TCP::client_port]: Post Set-Cookies: [HTTP::header values Set-Cookie]"
}

If you want to use the same iRule on multiple virtual servers with different pools and corresponding persistence default cookie names, you could add logic to the iRule to look for a cookie name based on BIGipServer[LB::server name].

Aaron