ZyXEL Communications P-661H Series, User Manual, Page: 213 / 383

P-661H/HW Series User’s Guide
Chapter 13 VPN Screens 213
NAT Traversal This function is available if the VPN protocol is ESP .
Select this check box if you want to set up a VPN tunnel when there are NAT
routers between the ZyXEL Device and remote IPSec router. The remote IPSec
router must also enable NAT traversal, and the NAT routers have to forward UDP
port 500 packets to the remote 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 ZyXEL Device drops trailing spaces.
IPSec Key Mode Select IKE or Manual from the drop-down list box. IKE provides more protection
so it is generally recommended. Manual is a useful option for troubleshooting if
you have problems using IKE key management.
Negotiation Mode Select Main or Aggressive from the drop-down list box. Multiple SAs connecting
through a secure gateway must have the same negotiation mode.
Encapsulation
Mode
Select Tunnel mode or Transport mode from the drop-down list box.
DNS Server (for
IPSec VPN)
If there is a private DNS server that services the VPN, type its IP address here.
The ZyXEL Device assigns this additional DNS server to the ZyXEL Device'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 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 Type Use the drop-down menu to choose Single , Range , or Subnet . Select Single for
a single IP address. Select Range for a specific range of IP addresses. Select
Subnet to specify IP addresses on a network by their subnet mask.
IP Address Start When the Local Address Type field is configured to Single , enter a (static) IP
address on the LAN behind your ZyXEL Device. When the Local Address Type
field is configured to Range , enter the beginning (static) IP address, in a range of
computers on your LAN behind your ZyXEL Device. When the Local Address
Type field is configured to Subnet , this is a (static) IP address on the LAN behind
your ZyXEL Device.
End / Subnet Mask When the Local Address Type field is configured to Single , this field is N/A.
When the Local Address Type field is configured to Range , enter the end (static)
IP address, in a range of computers on the LAN behind your ZyXEL Device. When
the Local Address Type field is configured to Subnet , this is a subnet mask on
the LAN behind your ZyXEL Device.
Table 84 Edit VPN Policies
LABEL DESCRIPTION