For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

jonathan_239725's avatar
jonathan_239725
Icon for Nimbostratus rankNimbostratus
Jan 19, 2017

Trigger Once per session for specific client iRule

Good evening all,   I am looking for a way to do a "one time" trigger within an iRule.   Scenario:   User accesses site and if the html text "banana" is seen, log something, insert something...
application delivery
iRules
IheartF5_45022's avatar
IheartF5_45022
Icon for Nacreous rankNacreous
Jan 20, 2017

All variables have scope of TCP session. Or do you mean users browser session? You could add in a session cookie to help you with that.

 

Also when you say 'html text "banana"' do you mean if you see the word 'banana' in the content of an HTTP response?

 

A bit more info and we can give you some code to illustrate.....

 

jspiglerj2rsolves's avatar
jspiglerj2rsolves
Icon for Nimbostratus rankNimbostratus
Jan 20, 2017

Sorry if my requirements weren't clear. My use case wasn't the greatest. I'm simply trying to track within the Big-IP when a specific criteria is met, carry out action X and don't do it again for the duration of the users session. Unfortunately setting a cookie on the clients end is not an option. Doing further research, would setting the value in the session table work?

Something like this

when HTTP_REQUEST {

if { [table -subtable lookup [IP::client_addr] [HTTP::host]] !=""} {

        return

    }elseif { ([HTTP::header value host] contains "web.company.com")} {

        log local0. "Criteria met for [IP::client_addr] for  [HTTP::header value host] in request"
         table set -subtable [IP::client_addr] [HTTP::host]

    }

}

when CLIENT_CLOSED {

table delete -subtable [IP::client_addr]

}