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User's IP visible to protected server?

Hi
Is there a way to pass the clients IP to the server?

I have a web application that blocks the IP of users who enters bad credentials too many times. But the IP it blocks is the IP of the gateway, not the client.

This takes down my entire site for 10 min until the ban is lifted [:)]

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0 darrellr_01 over 10 years ago

See if you can block based on the http header information (x-forwarded-for IP I think) instead of the source ip. If you are reverse proxying, the IP source will always be your gateway/reverse proxy.
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0 DouglasFoster over 7 years ago

If you are using Microsoft IIS, you will want to check these Microsoft links:

 IIS 8.5 
  
 https://blogs.msdn.microsoft.com/benjaminperkins/2015/05/04/passing-client-ip-to-a-server-in-the-web-farm-using-application-request-router/

IIS 7.0-8.0
https://blogs.iis.net/wadeh/dynamic-ip-restriction-proxy-mode

and this, which was built for earlier versions, and I think is obsoleted by the material in the other articles
https://blogs.iis.net/anilr/client-ip-not-logged-on-content-server-when-using-arr

You should be able to read the variable in ASP code using Request.ServerVariables("HTTP_x-forwardedfor")