Allocate fixed port for program
 

I have written a program which uses port 5000. I need to restrict other programs use this port when I'm not running that program. In Linux are there a mechanism to restrict port 5000 accesses from other programs. Any idea please...

All you have to do is:

a) have your server bind to the port
b) leave your server running

PS:
I'm oversimplifying a bit, but that's really pretty much all you have to do most of the time ... and it's usually sufficient.

IMHO .. PSM

PPS:
If some other service happens to bind to your port first, you can easily identify the culprit with a tool like "lsof".

Other options:

1. write a short dummy prog to bind to that port when the real one is offline
2. if root access; set an itpable rule to block that port when not running.