Forum Discussion

SteveT_240596's avatar
SteveT_240596
Icon for Nimbostratus rankNimbostratus
Feb 03, 2016

session persistance using x-forward-for

The traffic coming to our virtual server is being reverse proxied from 2 TMG servers meaning we only see 2 source IP addresses. The header does contain the x-forward-for address of the original clien...
application delivery
BIG-IP
iRules
Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
Feb 03, 2016

Hi Steve,

you may try the snippet below...

when HTTP_REQUEST { 
    if { [HTTP::header value "X-Forwarded-For"] ne "" } then {
         log local0. "PATTS \"X-Forwarded-For\" header: [HTTP::header value "X-Forwarded-For"]"
        persist uie [HTTP::header value "X-Forwarded-For"] 1830 
    } else {
         log local0. "No \"X-Forwarded-For\" header found."
    }
}

Note: I duno if you posted just the half iRule for illustration purposes? I've completed then given iRule, tweaked here and there a little bit the syntax and added an additional [log] statement to get some ouput if no X-Forwarded-For header is not present or somehow empty.

Cheers, Kai