Netgear Modem FVS318N User Manual Page 222

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Virtual Private Networking Using IPSec and L2TP Connections
222
ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N
Manage IPSec VPN Policies
Manage IKE Policies
Manage VPN Policies
After you have used the VPN Wizard to set up a VPN tunnel, a VPN policy and an IKE policy
are stored
in separate policy tables. The name that you selected as the VPN tunnel
connection name during the VPN Wizard setup identifies both the VPN policy and IKE policy.
You can edit existing policies, or manually add new VPN and IKE policies directly in the policy
tables.
Manage IKE Policies
The Internet Key Exchange (IKE) protocol performs negotiations between the two VPN
gateways and provides automatic management of the keys that are used for IPSec
connections. It is important to remember that:
An auto
matically generated VPN policy (auto policy) needs to use the IKE negotiation
protocol.
A man
ually generated VPN policy (manual policy) cannot use the IKE negotiation
protocol.
IKE policies are activated when the following situations occur:
1. The VPN po
licy selector determines that some traffic matches an existing VPN policy of
an auto policy type.
2. Th
e IKE policy that is specified in the Auto Policy Parameters section of the Add VPN Policy
screen (see Figure 142 on p
age 233) for the VPN policy is used to start negotiations with the
remote VPN gateway.
3. An
IKE session is established, using the security association (SA) settings that are specified
in a matching IKE policy:
Keys and
other settings are exchanged.
An IPSec
SA is established, using the settings that are specified in the VPN policy.
The VPN tunnel is then available for data transfer.
When you use the VPN Wizard to set up a VPN tunnel, an IKE policy is established and
popu
lated in the List of IKE Policies, and is given the same name as the new VPN connection
name. You can also edit exiting policies or add new IKE policies from the IKE Policies screen.
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