ZyXEL Communications Vantage CNM User Manual page 193

Table 69 Configuration > VPN > IKE Policy (continued)
LABEL
NAT Traversal
Gateway Policy
Information
My ZyWALL
Remote Gateway
Address
Authentication Key
Chapter 11 Configuration > VPN
DESCRIPTION
Select this check box to enable NAT traversal. NAT traversal allows you to set
up a VPN connection when there are NAT routers between the two IPSec
routers.
Note: The remote IPSec router must also have NAT traversal
enabled.
You can use NAT traversal with ESP protocol using Transport or Tunnel
mode, but not with AH protocol nor with manual key management. In order for
an IPSec router behind a NAT router to receive an initiating IPSec packet, set
the NAT router to forward UDP port 500 to the IPSec router behind the NAT
router.
This field identifies the WAN IP address or domain name of the ZyWALL. You
can select My Address and enter the ZyWALL's static WAN IP address (if it
has one) or leave the field set to 0.0.0.0.
The following applies if the My ZyWALL field is configured as 0.0.0.0:
• When the WAN port operation mode is set to Active/Passive, the
ZyWALL uses the IP address (static or dynamic) of the WAN port that is in
use.
• When the WAN port operation mode is set to Active/Active, the ZyWALL
uses the IP address (static or dynamic) of the primary (highest priority)
WAN port to set up the VPN tunnel as long as the corresponding WAN1 or
WAN2 connection is up. If the corresponding WAN1 or WAN2 connection
goes down, the ZyWALL uses the IP address of the other WAN port.
• If both WAN connections go down, the ZyWALL uses the dial backup IP
address for the VPN tunnel when using dial backup or the LAN IP address
when using traffic redirect. See the chapter on WAN for details on dial
backup and traffic redirect.
Otherwise you can select My Domain Name and choose one of the dynamic
domain names that you have configured (in the DDNS screen) to have the
ZyWALL use that dynamic domain name's IP address.
The VPN tunnel has to be rebuilt if the My ZyWALL IP address changes after
setup.
Type the WAN IP address or the domain name (up to 31 characters) of the
IPSec router with which you're making the VPN connection. Set this field to
0.0.0.0 if the remote IPSec router has a dynamic WAN IP address.
In order to have more than one active rule with the Remote Gateway
Address field set to 0.0.0.0, the ranges of the local IP addresses cannot
overlap between rules.
If you configure an active rule with 0.0.0.0 in the Remote Gateway Address
field and the LAN's full IP address range as the local IP address, then you
cannot configure any other active rules with the Remote Gateway Address
field set to 0.0.0.0.
Vantage CNM User's Guide
192