Ike Policies; Ike Policy Operation - NETGEAR ProSafe FVS338 Reference Manual

FVS338 ProSafe VPN Firewall 50 Reference Manual
6. Click Apply. The VPN Client screen will display showing that the VPN Client has been
enabled. Click the IKE Policies tab to view the corresponding IKE Client Policy.

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 Policy Operation

IKE Policies are activated when:
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.
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v1.0, September 2006
Virtual Private Networking