code: public static boolean isLocalAddress(final InetAddress addr)
  	{
  		if (addr.isLoopbackAddress())
  		{
  			return true;
  		}
  
  		try
  		{
  			Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
  
  			while (nics.hasMoreElements())
  			{
  				Enumeration<InetAddress> addrs = nics.nextElement().getInetAddresses();
  
  				while (addrs.hasMoreElements())
  				{
  					if (addrs.nextElement().equals(addr))
  					{
  						return true; // Search successful
  					}
  				}
  			}
  		}
  		catch (SocketException e)
  		{
  			log.debug(e.getMessage(), e);
  		}
  
  		log.debug("[FileHelper] {isLocalAddress} not local: " + addr.getHostAddress());
  
  		// Search failed
  		return false;
  	}
docs: Determines if a specified host or IP refers to the local machine
  
  @param addr
  String The host/IP
  
  @return boolean True if the input points to the local machine, otherwise false Checks by enumerating the NetworkInterfaces
  available to Java.