Hi there

Can anyone please help me. I have a software that sends data through to a specific port, eg port 1719 and another software suppose to pick this data up on a recieving port.
So basically we have a server and a client, server sents through a port and client recieves that data from a port.

Is there any software that can help me so that I can see exactly what data is being sent out to a port and software that can help me to see what data is being recieved from a port?