X-Forwarded-For is inserted by an HTTP proxy, not by your IIS server. If you're getting it directly from your IIS server, then it thinks it's acting as a proxy... which is less likely. More likely is that you have a proxy somewhere that either you don't know about or that you forgot about.
X-Forwarded-For is inserted by an HTTP proxy, not by your IIS server. If you're getting it directly from your IIS server, then it thinks it's acting as a proxy... which is less likely. More likely is that you have a proxy somewhere that either you don't know about or that you forgot about.
http://en.wikipedia.org/wiki/X-Forwarded-For