Configuring Ike Policies - NETGEAR FVS336Gv1 - ProSafe Dual WAN Gigabit Firewall Reference Manual

ProSafe Dual WAN Gigabit Firewall with SSL & IPsec VPN FVS336G Reference Manual
You can edit existing policies, or add new VPN and IKE policies directly in the policy tables.
Note: You cannot modify an IKE policy that is associated with an enabled VPN policy.
To modify the IKE policy, first disable the VPN policy. After you have modified
and saved the IKE policy, you can then re-enable the VPN policy.

Configuring IKE Policies

The IKE (Internet Key Exchange) protocol performs negotiations between the two VPN gateways,
and provides automatic management of the keys used in IPsec. It is important to remember that:
• "Auto" generated VPN policies must use the IKE negotiation protocol.
• "Manual" generated VPN policies cannot use the IKE negotiation protocol.
IKE policies are activated when the following occur:
1. The VPN Policy Selector determines that some traffic matches an existing VPN policy. If the
VPN policy is of type "Auto", then the Auto Policy Parameters defined in the VPN policy are
accessed which specify which IKE policy to use.
2. If the VPN policy is a "Manual" policy, then the Manual Policy Parameters defined in the
VPN policy are accessed and the first matching IKE policy is used to start negotiations with
the remote VPN gateway.
• If negotiations fail, the next matching IKE policy is used.
• If none of the matching IKE policies are acceptable to the remote VPN gateway, then a
VPN tunnel cannot be established.
3. An IKE session is established, using the SA (Security Association) parameters specified in a
matching IKE policy:
• Keys and other parameters are exchanged.
• An IPsec SA (Security Association) is established, using the parameters in the VPN
policy.
The VPN tunnel is then available for data transfer.
The IKE Policies Screen
When you use the VPN Wizard to set up a VPN tunnel, an IKE policy is established and populated
in the List of IKE Policies table on the IKE Policies screen and is given the same name as the new
VPN connection name. You can also edit exiting policies or add new IKE policies directly on the
IKE Policies screen.
5-16 Virtual Private Networking Using IPsec
v1.0, January 2010