[dghost@gw ~] $ nc -l -u -p 53 < /tmp/fifo | nc localhost 6667 > /tmp/fifo usage: nc [-46DdhklnrStUuvzC] [-i interval] [-p source_port] [-s source_ip_address] [-T ToS] [-w timeout] [-X proxy_version] [-x proxy_address[:port]] [hostname] [port[s]] сабж, взято отсюда: http://www.zarb.org/~gc/html/udp-in-ssh-tunneling.html