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

The two addresses you've listed there are from one of the ranges defined as being private. (see here for description)

It sounds more like you're picking up the internal address of your own firewall(s)?