HTTP_X_FORWARDED_FOR missing from servervariables in c#

Question

I would like to get the ClientIPaddress but when I call to Request.ServerVariables["HTTP_X_FORWARDED_FOR"] I always get NULL.

After checking the list of the Servervariables I noticed that HTTP_X_FORWARDED_FOR is not in the list of options.

Anyone knows how this is possible and how to solve? Or is it normal that this option is not in the list and I'm missing something.

Thanks in advance

Answer 1

Request.ServerVariables["HTTP_X_FORWARDED_FOR"] will only have a value, if the request was forwarded by a proxy. Usually you will get the client IP by using Request.ServerVariables["REMOTE_ADDR"].