@dmast 

You would use the rotuer's access control option.  Here is an FAQ to show you how to use it.

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 internet entirely.

  @dmast 

Change the Target entry to IP or MAC that that should acomplish the goal.  

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

  @dmast 

If its for a specific device you would want to use the port forwarding feature to ensure those ports are open specifcally to that device.  Here is the FAQ about port forwarding