Forum Discussion

spalande's avatar
spalande
Icon for Nacreous rankNacreous
Feb 17, 2014

iRule for logging x-forwarded-for header

Getting client request with x-forwarded-for header value. How to log these using irule and using data group for specific client ips  
application delivery
devops
iRules
Kevin_Stewart's avatar
Kevin_Stewart
Icon for Employee rankEmployee
Feb 17, 2014

The simplest approach might be something like this:

when HTTP_REQUEST {
    if { [HTTP::header exists X-Forwarded-For] } {
        log local0. "Received XFF from [IP::client_addr]: [HTTP::header X-Forwarded-For]"    

        if { [class match [HTTP::header X-Forwarded-For] equals my_ip_dg] } {
            log local0. "Data group source match"
        }
    }
}