ZyXEL P-335U User Guide - Page 147
Remote DNS Server, VPN Summary
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P-334U/P-335U User's Guide 13.2 Remote DNS Server In cases where you want to use domain names to access Intranet servers on a remote network that has a DNS server, you must identify that DNS server. You cannot use DNS servers on the LAN or from the ISP since these DNS servers cannot resolve domain names to private IP addresses on the remote network The following figure depicts an example where three VPN tunnels are created from ZyXEL Device A; one to branch office 2, one to branch office 3 and another to headquarters. In order to access computers that use private domain names on the headquarters (HQ) network, the ZyXEL Device at branch office 1 uses the Intranet DNS server in headquarters. The DNS server feature for VPN does not work with Windows 2000 or Windows XP. Figure 89 VPN Host using Intranet 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 network. 13.3 VPN Summary Click Security > VPN to display the Summary screen. This is a read-only menu of your VPN rules (tunnels). Edit a VPN by clicking the Edit icon. Figure 90 Security > VPN > Summary Chapter 13 IPSec VPN 147