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Forum Discussion

Norman_Zhang's avatar
Norman_Zhang
Icon for Nimbostratus rankNimbostratus
May 31, 2021

X-Forwarded-For Log iRule

Currently I have "Insert X-Forwarded-For" field enabled on a http-custom profile. I would like to capture the field in the F5 log.   * To enable this, I need to disable http-custom profile and us...
devops
iRules
LTM
Daniel_Wolf's avatar
Daniel_Wolf
Icon for MVP rankMVP
Jun 01, 2021

Hi Norman,

you don't have to disable the custom HTTP Profile. You can use this iRule to log the XFF header which was set by the HTTP profile.

when HTTP_REQUEST {
    if { [HTTP::header values "X-Forwarded-For"] ne "" } {
        log local0. "X-Forwarded-For: [HTTP::header X-Forwarded-For]"
    }
}

The iRule will read the XFF value which was inserted by the HTTP profile.

KR

Daniel