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Check Local IP Address

/ Published in: C#
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  1. private bool CheckLocalAdress(string host)
  2.         {
  3.             try
  4.             { // get host IP addresses
  5.                 IPAddress[] hostIPs = Dns.GetHostAddresses(host);
  6.                 // get local IP addresses
  7.                 IPAddress[] localIPs = Dns.GetHostAddresses(Dns.GetHostName());
  8.  
  9.                 // test if any host IP equals to any local IP or to localhost
  10.                 foreach (IPAddress hostIP in hostIPs)
  11.                 {
  12.                     // is localhost
  13.                     if (IPAddress.IsLoopback(hostIP)) return true;
  14.                     // is local address
  15.                     foreach (IPAddress localIP in localIPs)
  16.                     {
  17.                         if (hostIP.Equals(localIP)) return true;
  18.                     }
  19.                 }
  20.                 return false;
  21.             }
  22.             catch (Exception ex)
  23.             { throw new Exception(ex.Message.ToString()); }
  24.         }

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