Draytek 2925 block on lan

[Ish]

Hi

We have a Draytek 2925. I wasnt to restrict which devices can connect to a certain device on our network.

Let's say the device has the IP 192.168.1.247 and I don't want anything on the LAN to be able to access it.

I setup this firewall rule but it isn't doing anything.

What am I doing wrong?

 

[Ish]

Ideally I was hoping the firewall rule method would work as it would make things simpler but I can VLAN it as a last resort.