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Forum Discussion

NewTOF501_15047's avatar
NewTOF501_15047
Icon for Nimbostratus rankNimbostratus
May 15, 2014

X-forwarder is not working

I Enabled the Insert X-Forwarded-For option in the HTTP profile. I am getting null in instead of IP in IBM Http server using following code. LogFormat "%v %{X-Forwarded-For}i %l %u %t \"%r\" %>s %b" ...
nitass_89166's avatar
nitass_89166
Icon for Noctilucent rankNoctilucent
May 18, 2014

now i am viewing in wireshark how to find Client IP forwarded

 

this article explains how standard virtual server with layer 7 (virtual server you are using) sets up a connection between client and server.

 

sol8082: Overview of TCP connection setup for BIG-IP LTM virtual server types

 

http://support.f5.com/kb/en-us/solutions/public/8000/000/sol8082.html

 

so, you have to match client-side packet and server-side packet. at the server-side packet, look for x-forwarded-for header.

 

  • NewTOF501_15047's avatar
    NewTOF501_15047
    Icon for Nimbostratus rankNimbostratus
    May 18, 2014
    There nothing for x-forwarded-for
  • NewTOF501_15047's avatar
    NewTOF501_15047
    Icon for Nimbostratus rankNimbostratus
    May 18, 2014
    sorry i am able to see IP in x-forwarded-for but why it not appearing in fiddler or ibm http server . it printing null in log LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %s %b \"%{Referer}i\" \"%{User-agent}i\"" combined_forwarded SetEnvIfNoCase X-Forwarded-For "." from_proxy=1 CustomLog logs/access_ip_log combined_forwarded env=from_proxy