ZyXEL Communications P-2612HW-F1 User Manual page 265

The following table describes the fields in this screen.
Table 77 Security > VPN > Setup > Edit
LABEL
IPSec Setup
Active
Keep Alive
NAT Traversal
Name
IPSec Key Mode
Negotiation
Mode
Encapsulation
Mode
DNS Server (for
IPSec VPN)
Local
Local Address
Type
P-2612HW-F1 User's Guide
DESCRIPTION
Select this check box to activate this VPN policy. This option
determines whether a VPN rule is applied before a packet leaves the
firewall.
Select either Yes or No from the drop-down list box.
Select Yes to have the ZyXEL Device automatically reinitiate the SA
after the SA lifetime times out, even if there is no traffic. The remote
IPSec router must also have keep alive enabled in order for this feature
to work.
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.
Type up to 32 characters to identify this VPN policy. You may use any
character, including spaces, but the ZyXEL Device drops trailing
spaces.
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.
Select Main or Aggressive from the drop-down list box. Multiple SAs
connecting through a secure gateway must have the same negotiation
mode.
Select Tunnel mode or Transport mode from the drop-down list box.
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.
Specify the IP addresses of the devices behind the ZyXEL Device that
can use the VPN tunnel. The local IP addresses must correspond to the
remote IPSec router's configured remote IP addresses.
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.
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.
Chapter 14 VPN
265