Originally Posted by ferdous1986
To configure ssh service for the network example.com that-
-User khaled can access to your system via ssh with in the network example.com
-Any user of the network mig233 org canít access to your system via ssh
Read the manpages for sshd_config(5). In particular, see the AllowUsers, DenyUsers, AllowGroups, and DenyGroups directives.
You probably aren't going to learn new concepts if others do your homework for you.