tcp_relay -p port [-s] -h host ... remotehost[:port]
For more details, read the source.
-p port
The port tcp_relay will listen for connections on.
-s
If this option is given, only a single connection at a
time will be handled. Otherwise tcp_relay will fork a new copy of itself for
each incomming connection and go on to accept new connections.
-h host
Connections from this host will be allowed. Several of
these may be supplied.
This software is Copyright 1996 by Karl-Johan Johnsson.