I have it on a specific port.

He's told Skype to use a specific port.

These applications run all the time on the server machine and they listen to specific ports, waiting for people or programs to attach to the port.

In that section you can specify payloads to be sent to specific ports.

And only after four attempts at specific ports in a specific sequence is then the actual port that you want to connect to made available.

Or, as we've said, you could just forward specific ports.

And then you tell Skype to listen on that specific port.

Lightering is sometimes used where a loaded tanker is too large to enter a specific port.

A port-map can be useful to determine opening/closing-timing and the area of specific ports.

But it is the case that there are malicious people, now and still, scanning the Internet, looking for specific vulnerable ports.