LAN to LAN Firewall Blocking

[Peter_APIIT]

Dear All,
I would like to restrcited my LAN to LAN communication between PC.
How to do it? Please provide some examples. The reason for this Im suspect my ISP inject backdoor to my system already where i cannot format the PC also.

[johnpoz]

You don't do that on pfsense - pfsense has no say in devices on the same network from talking to each other.

Pfsense is L3 router/firewall - it routes and firewalls traffic leaving 1 network and going to a different network.

If you want to firewall PC X from talking to PC Y - move it to a different network/vlan, or use host firewalls on your devices you don't want it talking to. Or setup private vlan on your switching environment, etc. Pfsense can not stop X from talking to Y when they are on the same network.