c# - Get All IP Addresses on Machine

Question

How can I get all of the IP addresses attached to the machine that my application (C# NET Console app) is running on? I need to bind a WCF service to the primary IP address, and return a list of the full IP address list.

using System.Net;

string myHostName = Dns.GetHostName().ToString();
string ipAddress = Dns.Resolve(HostName).AddressList[0].ToString();

This is what I am using right now to get the Primary IP address, but I can't figure out how to get the rest to return them.

If I bind a WCF service to localhost:8000, will that expose it on the primary?

Answer 1

The DNS variants work across the network, but one DNS entry can have many IP addresses and one IP address can have many DNS entries. More importantly, an address needn't be bound to a DNS entry at all.

For the local machine try this:-

  foreach (NetworkInterface netInterface in NetworkInterface.GetAllNetworkInterfaces())
  {
    Console.WriteLine("Name: " + netInterface.Name);
    Console.WriteLine("Description: " + netInterface.Description);
    Console.WriteLine("Addresses: ");
    IPInterfaceProperties ipProps = netInterface.GetIPProperties();
    foreach (UnicastIPAddressInformation addr in ipProps.UnicastAddresses)
    {
      Console.WriteLine(" " + addr.Address.ToString());
    }
    Console.WriteLine("");
  }