How to get a client's ip address with ASP.NET

ASP .Net web page:
ASP .NET web services:

or you can try:
REMOTE_ADDR does not always provide the users IP but rather the ISPs' IP address so first test HTTP_X_FORWARDED_FOR as this one is the real user IP.

This is very helpful for me. Many thanks

Another important note to this

the HTTP_X_FORWARDED_FOR may contain an array of IP, this can happen if you connect through a proxy.
What also happens when this happens is that the REMOTE_ADDR may contain the proxy IP.

to avoid this problem you can parse the HTTP_X_FORWARDED_FOR for the last entery IP.

this can easily be done using...
This code example is C#.NET but the method is the same

What this does is check if we have anything in the HTTP_X_FORWARDED_FOR, and if we do we take out the last entry (works if only one entry is found aswell)
if we don't have an HTTP_X_FORWARDED_FOR we set the IP from the REMOTE_ADDR instead

only one thing...Servervariables is the NameValueCollection type so its items cannot be accesed by doing ServerVariables(ItemName) if C# is used for coding.
Instead please use... ServerVariables[ItemName] that doesn't hurt

Yes of cause. My misstake.

there were also some concern about the order of the X-FORWARDED-FOR addresses.

My code gets the last entry in the string.
for the first entry simply use
instead of

also remember that those values are a comma+space separated list so you could add string trueIP = ipRange[0].Trim(); in order to avoid spaces in fornt or in the back of your result, but that is just a bit picky from my side... sorry about that

Hi i m not able to get value of HTTP_X_FORWARDED_FOR , the value Request.ServerVariables("HTTP_X_FORWARDED_FOR") i get is nothing so kindly guide me

I test this in my VS2008 and it write "127.0.0.1",but I don't know how it will show in a real web site,did I finish it?

There is a simple way to get client's ipAddress
you just need to write one line
and write the below query