Initial setup

Setup VLANs - Interfaces → Devices → VLAN

Management 99

WiFi 20

WiFi guest 22

Assign interfaces - Interfaces → Assignments → choose an interface

Parent : LAN

IPv4 config type : Static IPv4, IPv4 address 192.168.xx.1 / 24

Navigate to System → Settings → Administration and change the TCP port field to something other than 80 or 443. Then, also check the HTTP Redirect field to disable web GUI redirect rule.

Services:

ISC DHCPv4 → Interface → Enable DHCP server, specify range (x.x.x.100 to 199)

Backup

System → Configuration → Backups