PVLAN

Hi @CCVO,

Welcome to Zyxel Community!
Regarding the scenario, I assume that your goal is to avoid the 4 PCs to communicate to each other, and could communicate with VPN100 and 3x servers only, if this is the case, you may configure port isolation to achieve the goal.

Steps:
1. Advance application > VLAN > VLAN configuration > VLAN port setup
2. Check the "Isolation" box where the PCs are connected, and click "Apply" button.

Note: Remember to click "Save" after changing configuration

Hope it helps.
Jonas