It depends on what type of connection you want.
If you want to allow anyone to connect to your box and read and write
data from/to a serial port, you can write a deamon (server process)
which listens to your serial ports and then sends it to a socket. You'd
also need a thread which does the inverse, if you want bi-directional
communication.
If you simply want to send data from your tty ports to some socket
somewhere on your network, it's even easier. Perl is the perfect tool
for these things.
There's also devices like IOLANs, which have 16 serial ports and connect
to a 10Mbit ethernet. I don't know what a Portmaster does.
Arne
--
Arne Joris
#603 9747 106st
T5K 1B4 Edmonton, AB
Arne....@powersurfr.com