Is there a way to prevent a specific process from creating any TCP/UDP connection under Linux? Just like the firewall under Windows, I need to block a process's any network activity.
One possible way to do it is to run this process under specific user and
For more info, see
The one which Khaled said, is one of very good way of doing this.
Also, if you are into Selinux, then SElinux will serve this purpose for you and can also provide some other additional security requirements which you might be looking for.
Would surely suggest to give it a try.