Closing router port from internet.

[Sab3r]

I'm wondering if there is a program out there (or settings in the router) that will
enable me to completly shut a computer from the internet.

At first I could control the internet traffic per computer in the router settings but
somehow its gone broken , I already mailed the helpdesk and stuff.

Router type: Draytek Vigor 2500 (annex a)
More detailed info on my router:
click

Thanks anyway :wave: