ZyXEL Communications ZyXEL ZyWALL P1 - Manual (Page 137)

ZyWALL P1 User’s Guide
136 Chapter 9 VPN Screens
Figure 54 VPN Rules (IKE): Gateway Policy
The following table describes the labels in this screen. .
Table 43 VPN Rules (IKE): Gateway Policy
LABEL DESCRIPTION
Property
NAT Traversal 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.
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.
Name Type up to 32 characters to identify this VPN policy. You may use any character,
including spaces, but the ZyWALL drops trailing spaces.