ZyWALL 2 Series User’s Guide

The following table describes the fields in this screen.

 

Table 14-7 Basic IKE VPN Rule Edit

 

 

LABEL

DESCRIPTION

 

 

Active

Select this check box to activate this VPN tunnel. This option determines whether a VPN

rule is applied before a packet leaves the firewall.

 

 

 

 

Select this check box to turn on the keep alive feature for this SA.

Keep Alive

Turn on Keep Alive to have the ZyWALL 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.

 

 

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.

 

 

Key Management

Select IKE or Manual Key from the drop-down list box. IKE provides more protection so it

(or IPSec Keying

is generally recommended. Manual Key is a useful option for troubleshooting.

Mode)

 

 

 

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.

 

 

Enable Extended

Select this check box to activate extended authentication.

Authentication

 

 

 

VPN Screens

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