How to Get the Client's IP Address in ASP.NET MVC?

 

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You can get the client's IP address in ASP.NET MVC by accessing the Request object in your controller action method. The Request object contains information about the current HTTP request, including the client's IP address.

Here's an example code snippet that shows how to get the client's IP address in an ASP.NET MVC controller action method:

csharp
public ActionResult Index()
{
    string ipAddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

    if (string.IsNullOrEmpty(ipAddress))
    {
        ipAddress = Request.ServerVariables["REMOTE_ADDR"];
    }

    return View(ipAddress);
}

In the example above, we first check for the "HTTP_X_FORWARDED_FOR" header in the Request.ServerVariables collection. This header is added by proxies and load balancers and contains the original client IP address. If this header is not present, we fall back to using the "REMOTE_ADDR" server variable, which contains the IP address of the client making the request.

Note that in some cases, the client IP address may be masked or changed by intermediate proxies or load balancers. In such cases, the above code may not return the actual client IP address.