UniFi Firewall Defaults Too Are Open: Here’s How to Lock Them Down

UniFi networking equipment ships with permissive default security settings that allow inter-VLAN communication, unrestricted gateway management access, and open switch ports. This guide demonstrates how to implement a locked-down security posture by configuring port security (disabling unused ports, restricting VLANs, MAC address filtering), creating zone-based firewall rules that block traffic by default, limiting gateway management interface access to only DNS/DHCP ports, isolating networks properly, and handling VPN client routing. The tutorial covers practical implementation using custom zones, inverted block rules, and granular allow policies to achieve defense-in-depth security.