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jba3126's avatar
jba3126
Icon for Cirrostratus rankCirrostratus
Apr 10, 2015

How to preserve existing X-Forward-For Header when using SNAT

First question is does SNAT alter an existing X-Forward-For header?   We have a web service that goes DMZ LTM -> XML Security Device -> PBN LTM /with SNAT. The application has IP based role rest...
application delivery
LTM
microsoft
snat
x-forwarded-for
kunjan's avatar
kunjan
Icon for Nimbostratus rankNimbostratus
Apr 10, 2015

Jeff, SNAT doesn't modify that. Unless you have HTTP profile with "Insert X-Forwarded-For" enabled or an iRule which does it.

You can log what is send out of the BigIP by attaching iRule to the virtual server

when HTTP_REQUEST_SEND {
  clientside {
        foreach x [HTTP::header names] {
           log local0. "Request header($x) = [HTTP::header $x]"
        }
    }
}