Private Network; Private Dns Server Behind A Remote Ipsec Router; Lan; Figure 66 Private Dns Server Example - ZyXEL Communications ZYWALL P1 User Manual

Chapter 6 LAN Screens
3 Use the ADVANCED > REMOTE MGMT DNS screen to configure the ZyWALL (in
router or zero configuration mode) to accept or discard DNS queries.

6.7.1 Private DNS Server Behind a Remote IPSec Router

In cases where you want to use domain names to access Intranet servers on a remote private
network that has a private DNS server, you must identify that DNS server. You cannot use
DNS servers on your ZyWALL's LAN or from the ISP since these DNS servers cannot
resolve domain names to private IP addresses on the remote private network.
The following figure depicts an example where three VPN tunnels are created from ZyWALL
A; one to branch office 2, one to branch office 3 and another to headquarters (HQ). In order to
access computers that use private domain names on the HQ network, the ZyWALL at branch
office 1 uses the Intranet DNS server in headquarters.

Figure 66 Private DNS Server Example

If you do not specify an Intranet DNS server on the remote network, then the
VPN host must use IP addresses to access the computers on the remote

private network.

6.8 LAN

Click NETWORK > LAN to open the LAN screen. Use this screen to configure the
ZyWALL's IP address and other LAN TCP/IP settings as well as the built-in DHCP server
capability that assigns IP addresses and DNS servers to systems that support DHCP client
capability.
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ZyWALL P1 User's Guide