> The server should call udpSerSock.bind( ('10.1.1.27', 21567) ) > before it issues the recvfrom() call - otherwise, how is the > server's UDP layer to know which interface and address to > listen on? This is a red herring. udpSerSock is not intended to listen for packets, only to send one. -- Jason Orendorff http://www.jorendorff.com/