ZyXEL Communications wireless n gigbit router zyxel manual 201, Enabled

	Chapter 15 IPSec VPN
Table 68 Security > VPN > General > Rule Setup: IKE (Basic) (continued)
LABEL	DESCRIPTION
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.
	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
	ports 500 and 4500 to the IPSec router behind the NAT router.
IPSec Keying	Select IKE or Manual from the drop-down list box. IKE provides more
Mode	protection so it is generally recommended. Manual is a useful option
	for troubleshooting if you have problems using IKE key management.
DNS Server (for	If there is a private DNS server that services the VPN, type its IP
IPSec VPN)	address here. The NBG-460N assigns this additional DNS server to the
	NBG-460N's DHCP clients that have IP addresses in this IPSec rule's
	range of local addresses.
	A DNS server allows clients on the VPN to find other computers and
	servers on the VPN by their (private) domain names.
Local Policy	Local IP addresses must be static and correspond to the remote IPSec
	router's configured remote IP addresses.
	Two active SAs can have the same configured local or remote IP
	address, but not both. You can configure multiple SAs between the
	same local and remote IP addresses, as long as only one is active at
	any time.
	In order to have more than one active rule with the Secure 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 Secure 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
	Secure Gateway Address field set to 0.0.0.0.
Local Address	For a single IP address, enter a (static) IP address on the LAN behind
	your NBG-460N.
	For a specific range of IP addresses, enter the beginning (static) IP
	address, in a range of computers on your LAN behind your NBG-460N.
	To specify IP addresses on a network by their subnet mask, enter a
	(static) IP address on the LAN behind your NBG-460N.
Local Address	When the local IP address is a single address, type it a second time
End /Mask	here.
	When the local IP address is a range, enter the end (static) IP address,
	in a range of computers on the LAN behind your NBG-460N.
	When the local IP address is a subnet address, enter a subnet mask on
	the LAN behind your NBG-460N.

NBG-460N User’s Guide

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