I just realize the complication to have a java client to a c++ unix server, but i need a way to create a socket and send a datagram packet to a server - without that server to know where the message comes (and viceversa, server to reply to the client, without the awarness of the server address) - for the available reply one ca write in the message body and hi's reply ip-addr. maybe something like this to the InetAddress: socket.setLocalAddress() socket.setLocalAddress().fromString("192.168.1.1"); it's for a practical part of my graduation thesis, and i need a solution a.s.a.p. :( hope that someone have this implemented in java. Darius    More>>

			

			socket.setLocalAddress()
			

			socket.setLocalAddress().fromString("192.168.1.1");