This tutorial will show you how to get the list of all currently opened network connections to your Linux, Unix or Windows server.

Windows 2003, Windows 2000, Windows XP:

1. Go to Start.
2. Click on Run.
3. Type cmd and then click OK.
4. Type

netstat -an

-a - this parameter defines that you want to view all connections
-n - this parameter defines that you wish to view the address of the remotely connected server/user in numerical format rather than by hostname.

Additional useful parameters:

-b - this will print the name of the executable file that is in communication with the remote client
-v - When used in conjunction with -b, will display sequence of components involved in creating the connection or listening port for all executables.