X-Forwarded-for Header Insertion

In a lab setup, I wrote an irule to insert an X-forwarder-for header if one doesn't exist and using snat automap.The Ip address I see on the webserver is the SNAT (floating) IP address which is what I'm supposed to see (using tcpdump)However, I'm not able to see the X-forwarded-for header inserted using tcpdump

Hi,

did you check /var/log/ltm for TCL errors? If there are runtime errors while your iRule executes, the header will not be replaced!

Sample iRule:

 
when HTTP_REQUEST {
     HTTP::header replace "X-Forward-For" [IP::client_addr]

      check /var/log/ltm !!
     log local0. "[HTTP::request]"
}

Regards

Kurt Knochner