UserHostAddress gives wrong IPs

Question

I collect statistics on IP addresses from where users visit my site and I have noticed what there are only two IP addresses presented, 172.16.16.1 and 172.16.16.248. The pro

Answer 1

This looks like the work of a reverse proxy. When you use a reverse proxy, the client connects to the proxy, which itself opens a new connection to your server. Since ASP.NET uses the infos of the incoming connection to fill the user address, you get the address of the reverse proxy.

If you are indeed in this configuration, you'll need help from the reverse proxy to get the right information. Most reverse proxies offer the possibility to add a header to the HTTP request, with the real IP address of the client. Check the documentation of your proxy.