APM session.end Reason variable for Session Timeout event.

Hello,

 

I need logging timeout\logoff of APM session. I use event «when ACCESS_SESSION_CLOSE» and session variable "session.end" and write log (log0 in Irule). When the session is reset by the administrator, then I see in the log “admin_terminated” and when login fail I see then “policy_result”. But for session timeout event is see nothing.

 

How can I log this event?