The remote name could not be resolved "www.google.com"

Question

I am in a company network. In this network i can't ping external websites by IP. I can only call them by url like the browser does. Thats why i use WebRequest .

When i try to call "www.google.com" i got a "remote name could not be resolved (www.google.com)".

I have no "blocked" entry in my firewall. With this code i can call internal websites but not external.

This is my Code:

public void pingIP()
    {
        try
        {

            var url = uriBuilder;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url.Uri);
            //request.Accept = "*/*";
            //request.UseDefaultCredentials = true;
            //request.Proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;
            //request.UserAgent = "Foo";
            //request.Accept = "*/*";
            request.Method = "HEAD";
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            _PingByURL = response.StatusCode == HttpStatusCode.OK;
        }
        catch
        {

        }

    }

In app.config:

  <system.net>
      <defaultProxy enabled ="true" useDefaultCredentials = "true">
         <proxy usesystemdefault ="True" bypassonlocal="True"/>
      </defaultProxy>
  </system.net>

How can i resolve the remote name? And is this the fast and cleanest way to check if a website is reachable by URL?

Thank you!

Answer 1

This is working without a problem !

static void Main(string[] args)
{
    Console.WriteLine(PingTest());
}

public static bool PingTest()
{
    Ping ping = new Ping();

    PingReply pingStatus = ping.Send(IPAddress.Parse("208.69.34.231"));
    //For the web address you need !
    //PingReply pingStatus = ping.Send("www.google.com");

    return pingStatus.Status == IPStatus.Success;

}

It is possible to have network restrictions and you are failing because of them.

Answer 2

this is what i use to ping which works for me

public bool ConnectedToInternet()
    {
        var myPing = new Ping();
        const string host = "google.com";
        var buffer = new byte[32];
        const int timeout = 1000;
        var pingOptions = new PingOptions();
        var reply = myPing.Send(host, timeout, buffer, pingOptions);
        return reply != null && reply.Status == IPStatus.Success;

    }

try this and let me know if you get a reply or not