ZyXEL Communications P-335WT User Manual page 224

P-335 Series User's Guide
Table 73 VPN: Rule Setup (Basic)
LABEL
NAT Traversal
IPSec Keying Mode Select IKE or Manual from the drop-down list box. IKE provides more protection
Local Address
Remote Address
Start
Remote Address
End/Mask
DNS Server (for
IPSec VPN)
My IP Address
Local ID Type
224
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.
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.
so it is generally recommended. Manual is a useful option for troubleshooting.
The local IP address must be static and correspond to the remote IPSec router's
configured remote IP addresses.
Two active SAs can have the same 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.
Remote IP addresses must be static and correspond to the remote IPSec
router's configured local IP addresses. The remote address fields do not apply
when the Secure Gateway Address field is configured to 0.0.0.0. In this case
only the remote IPSec router can initiate the VPN.
Two active SAs cannot have the local and remote IP address(es) both the same.
Two active SAs can have the same 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.
Enter a (static) IP address on the network behind the remote IPSec router.
When the remote IP address is a single address, type it a second time here.
When the remote IP address is a range, enter the end (static) IP address, in a
range of computers on the network behind the remote IPSec router.
When the remote IP address is a subnet address, enter a subnet mask on the
network behind the remote IPSec router.
If there is a private DNS server that services the VPN, type its IP address here.
The Prestige assigns this additional DNS server to the Prestige'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.
Enter the WAN IP address of your Prestige. The Prestige uses its current WAN
IP address (static or dynamic) in setting up the VPN tunnel if you leave this field
as 0.0.0.0.
The VPN tunnel has to be rebuilt if this IP address changes.
Select IP to identify this Prestige by its IP address.
Select DNS to identify this Prestige by a domain name.
Select E-mail to identify this Prestige by an e-mail address.
Chapter 17 VPN Screens