Hi, Im trying to make a server that listens to one TCP socket for commands and then starts listening to more or less UDP sockets for data depending on the commands. The UDP data shall then be forwarded to one or more outgoing UDP ports. For example, here are some commands with explanations: addChannel 10000 should make the server listening to UDP port 10000 addChannel 10002 should make the server listening to UDP port 10002 addConnection 10000 10.0.0.2:5000 start forwarding the packet from UDP port 10000 to port 5000 on another machine addConnection 10000 10.0.0.3:5002 start forwarding the packet from UDP port 10000 to port 5002 on yet another machine delConnection 10000 10.0.0.2:5000 stop forwarding packets to the first guy delConnection 10000 10.0.0.3:5002 stop forwarding packets to the second guy delChannel 10000 stop listening to port 10000 Ive been making some rather advanced servers in twisted, but with fixed ports. How can I deal with this type of dynamic port bindings? For adding a port to listen to: reactor.listenUDP(10000,prot) is working, but how do I stop listening to a port an unbind it? Ive found something called unlistenUDP but it seems to be deprecated? Alternatively, I could start up a service , like u = internet.services.UDPServer(10000,UdpProtocol()) but how do I stop this particular service without stopping all others? Any suggestions are welcome. Regards, Torbjörn Einarsson1