ZyXEL Communications 2WG - Manual (Page 44)

ZyWALL 2WG Support Notes
All contents copyright (c) 2006 ZyXEL Communications Corporation.
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1) Configure the static Public IP address to WAN interface through Network-> WAN-> WAN IP Address
Assignment
2) Enter the WAN IP address as My Address in Gateway Policy
3) On peer VPN gateway, use the same IP address as Remote Gateway Address in Gateway Policy
On Local VPN gateway, select IP as the Local IP Type and enter the public WAN IP address as the
content of identify. One remote VPN peer, select IP as the Peer ID Type and enter the same IP address as
the content of identify.
Configure ZyWALL with Dynamic WAN IP Address
This section describes an example configuration ZyWALL with dynamic WAN IP address.
If ZyWALL uses PPPoE or Ethernet/DHCP for its Internet connection, WAN IP address is dynamically
assigned by ISP. Since ZyWALL has no idea about its WAN IP address before it is assigned, it is
difficult/impossible to use WAN IP Address for My Address in Gateway Policy.
To overcome this problem, Dynamic DNS can be used to resolving the VPN gateway. When new IP