@Carl I ended up blocking device entirely from network. What I need is ports 445 (SMB) and 9000 (Twonky) to be open.

Carl wrote @dmast You would use the rotuer's access control option. Here is an FAQ to show you how to use it. @Carl That example just blocks access to one website.What I need is to block access to...

How to block device (IPor MAC address) on LAN network to access internet, just to use local network? I have AC750 Wireless Dual Band Router Model No. Archer C20