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Forum Discussion

JimW_156953's avatar
JimW_156953
Icon for Nimbostratus rankNimbostratus
Feb 08, 2017

traffic coming over APM XforwardedIP not being recorded by IIS

Environment :   IIS windows host : Windows 2008R2 server f5 : 12.1 Basic virtual server : http only - one server in the pool Handling a strange issue. virtual server has x-forwarding http ...
application delivery
LTM
Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
Feb 08, 2017

Hi Jim,

IIS has a very poor support for X-Forwarded-For headers... 😞

I usually tend to write the original client IP into an additional cookie (via 

HTTP::cookie insert name "OrigIP" value [IP::client_addr]
) and collect those information by turning on IIS cookie logging. Its much easier, doesn require any bits'n'bytes on your servers and may already satisfy your needs... 😉

If you're still looking for a native 

X-Forwarded-For
support, then take a look to the following blog site. The site outlines and compares different techniques which are more or less supported/maintained by Microsoft or F5.

https://blogs.iis.net/deanc/iis7-8-logging-the-real-client-ip-in-the-iis-hit-logs

Cheers, Kai