ZyXEL Communications ZyWALL 2 Series User Manual

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ZyWALL 2 Series User’s Guide 
VPN Screens 
14-3 
You can also enter a remote secure gateway’s domain name in the Secure Gateway Address field if the 
remote secure gateway has a dynamic WAN IP address and is using DDNS. The ZyWALL has to rebuild the 
VPN tunnel each time the remote secure gateway’s WAN IP address changes (there may be a delay until the 
DDNS servers are updated with the remote gateway’s new WAN IP address).   
14.4.1 Dynamic Secure Gateway Address 
If the remote secure gateway has a dynamic WAN IP address and does not use DDNS, enter 0.0.0.0 as the 
secure gateway’s address. In this case only the remote secure gateway can initiate SAs.  
The Secure Gateway IP Address may be configured as 0.0.0.0 only when using IKE 
key management and not Manual key management. 
14.5 Summary Screen 
The following figure helps explain the main fields in the web configurator.  
Local and remote IP addresses must be static. 
 
Figure 14-1 IPSec Summary Fields 
Click VPN to open the VPN Rules screen. This is a read-only menu of your IPSec rules (tunnels). Edit or 
create an IPSec rule by selecting an index number and then clicking Edit to configure the associated 
submenus.