Hi,

given a host name, how can you i C# determine with 100% certainty if
it actually represents the local host? I am talking about DNS aliases
here.

I have tried the following, which seems to work in most cases. But it
unfortunately fails at a few customer installations:

public bool IsLocalHost(string hostName)
{
 IPHostEntry localhost = Dns.GetHostByName(Environment.MachineName);
 IPHostEntry hostInfo = Dns.GetHostByName(hostName);
 foreach (IPAddress localhostAddress in localhost.AddressList)
 {
   foreach (IPAddress hostAddress in hostInfo.AddressList)
   {
     if (localhostAddress.Equals(hostAddress)) return true;
   }
 }
 return false;
}

Any ideas?

Regards
Lars Fastrup
Navigo Systems
www.navigosystems.com