How do I get the caller's IP address in a WebMethod?

How do I get the caller's IP address in a WebMethod?

[WebMethod]
public void Foo()
{
// HttpRequest... ? - Not giving me any options through intellisense...
}

using C# and ASP.NET

[HttpContext.Current.Request.UserHostAddress](

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) is what you want.

The HttpContext is actually available inside the `WebService` base class, so just use `Context.Request` (or `HttpContext.Current` which also points to the current context) to get access to the members provided by the `HttpRequest`.

Try this:

string ipAddress = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];

Haven't tried it in a webMethod, but I use it in standard HttpRequests

Try:

Context.Request.UserHostAddress

Just a caution. IP addresses can't be used to uniquely identify clients. NAT Firewalls and corporate proxies are everywhere, and hide many users behind a single IP.

I made the following function:

static public string sGetIP()
{
try
{
string functionReturnValue = null;

String oRequestHttp =
WebOperationContext.Current.IncomingRequest.Headers["User-Host-Address"];
if (string.IsNullOrEmpty(oRequestHttp))
{
OperationContext context = OperationContext.Current;
MessageProperties prop = context.IncomingMessageProperties;
RemoteEndpointMessageProperty endpoint =
prop[RemoteEndpointMessageProperty.Name] as RemoteEndpointMessageProperty;
oRequestHttp = endpoint.Address;
}
return functionReturnValue;
}
catch (Exception ex)
{
return "unknown IP";
}
}

This work only in Intranet, if you have some Proxy or natting you should study if the original IP is moved somewhere else in the http packet.