RT-AX55 Cannot add LAN PC's to list

[JollyRoger]

Hello,
I have an RT-AX55 Asus Router
I am trying to block all outgoing and incoming traffic from a PC in my local network. I want to retain local wifi access to that PC but nothing over the Internet.
When I try to add a firewall rule to do this I get an error (see screenshots below.)

I do have a PC with the IP address shown in the local network. It has been assigned that static IP address in the DHCP settings (I believe)

Can someone please tell me what I'm doing wrong? Maybe this is not the way to do what I want to do?

Thanks

 

[ColinTaylor]

You don't do it on that page. You should use the Firewall - Network Services Filter.

 

[JollyRoger]

You don't do it on that page. You should use the Firewall - Network Services Filter.

How would you filter ALL IP addresses from that interface?

 

[ColinTaylor]

Leaving the destination address field empty means "all destinations addresses".

So basically you want a deny list with two rules, one for TCP and one for UDP. Specify the source (LAN) address and leave the other fields blank (apart from the mandatory TCP/UDP protocol).

 

[JollyRoger]

Leaving the destination address field empty means "all destinations addresses".

So basically you want a deny list with two rules, one for TCP and one for UDP. Specify the source (LAN) address and leave the other fields blank (apart from the mandatory TCP/UDP protocol).

Thank you so much Colin Taylor !!