How to get IP address of the server that HttpWebRequest connected to?

Question

DSN can return multiple IP addresses so rather then using DNS resolving to get the IP address after my request I want to get the IP that my HttpWebRequest connected to.

Is there anyway to do this in .NET 3.5?

For example when I do a simple web request to www.microsoft.com I want to learn that which IP address it connected to send the HTTP request, I want to this programmatically (not via Wireshark etc.)

Answer 1

This is a working example:

using System;
using System.Net;

class Program
{
    public static void Main ()
    {
        IPEndPoint remoteEP = null;
        HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("http://www.google.com");
        req.ServicePoint.BindIPEndPointDelegate = delegate (ServicePoint servicePoint, IPEndPoint remoteEndPoint, int retryCount) {
            remoteEP = remoteEndPoint;
            return null;
        };
        req.GetResponse ();
        Console.WriteLine (remoteEP.Address.ToString());
    }
}

Answer 2

here you go

static void Main(string[] args)
        {
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://www.microsoft.com");
            req.ServicePoint.BindIPEndPointDelegate = new BindIPEndPoint(BindIPEndPoint1);

            Console.ReadKey();
        }

        public static IPEndPoint BindIPEndPoint1(ServicePoint servicePoint, IPEndPoint remoteEndPoint, int retryCount)
        {
            string IP = remoteEndPoint.ToString();
            return remoteEndPoint;
        }

Use remoteEndPoint to collect the data you want.