Resolving LAN hostnames when connected to VPN

This is easy and works like a dream.

https://support.zyxel.eu/hc/en-us/articles/13564758012434-Firewall-Configure-a-DNS-Server-Zywall-Local-DNS-or-Google-DNS-

INTERFACE / LAN1/ADVANCE
DHCP Server
First DNS Server - 10.10.10.10 (replace with UR.domain DNS address)
2nd DNS Server - Zywall
3rd DNS Server - 8.8.8.8 (1.1.1.1 is better faster more secure IMHO)

STATIC DHCP Table
Not necessary but they help. If a device IP changes on a machine you might have to flush your DNS toilet to resolve stale lookup

SYSTEM / HOSTNAME
Give your Zyxel a name
example: ZYXEL.UR.domain (replace UR.domain with your AD name)

SYSTEM/DNS
ADDRESS/PTR RECORD
ADD WILDCARD *.UR.domain

DOMAIN ZONE FORWARDER
ADD - Domain Zone - UR.domain
CHECK - Private DNS Server - 10.10.10.10 (Your DC IP address)

GO TO WINDOWS DNS SERVER
ADD ZYXEL-ORLANDO to UR.domain forward look up zone.

Welcome to ping-dream world :)

FOR REMOTE SITE to SITE VPN Zyxel without local domain controller
INTERFACE / LAN1/ADVANCE
DHCP Server
1st DNS Server - 10.10.10.10 (replace with UR.domain DNS address)
2nd DNS Server - ZyWALL
3rd DNS Server - 8.8.8.8 (1.1.1.1 is better faster more secure IMHO)

SYSTEM / HOSTNAME
Give your Zyxel a name
ZYXEL-MIAMI.UR.domain

DHCP
1st DNS SERVER - 10.10.10.10 (replace with UR.domain DNS address)
2nd DNS SERVER - ZyWALL
3rd DNS SERVER - 8.8.8.8

DOMAIN ZONE FORWARDER
ADD - Domain Zone - UR.domain
CHECK - Private DNS Server - 10.10.10.10 (Your DC IP address)

(Welcome to Name Resolution Heaven)

RickkeeC
Orlando Florida USA
- home of Mickey Mouse