See Adding an AutoIKE key VPN tunnel.

Or, add a manual key VPN tunnel.

See Adding a manual key VPN tunnel.

Add one encrypt policy between the member VPN and the VPN concentrator. Use the following configuration:

Source Destination Action VPN Tunnel Allow inbound Allow outbound Inbound NAT Outbound NAT

Member VPN address. VPN concentrator address.

ENCRYPT

The VPN tunnel added in step 2. Select allow inbound.

Select allow outbound.

Select inbound NAT if required. Select outbound NAT if required.

See Adding an encrypt policy.

Add additional encrypt policies between the member VPNs. Use the following configuration:

Source Destination Action VPN Tunnel Allow inbound Allow outbound Inbound NAT Outbound NAT

Local member VPN address. Remote member VPN address

ENCRYPT

The VPN tunnel added in step 2. Select allow inbound.

Select allow outbound.

Select inbound NAT if required. Select outbound NAT if required.

Configuring IPSec redundancy

IPSec redundancy allows you to create a redundant AutoIKE key IPSec VPN configuration to two remote VPN gateway addresses.

For IPSec redundancy to work, both Internet connections must have static IP addresses.

To configure IPSec redundancy:

Add two remote gateways with the same settings (including the same authentication key) but with different remote gateway addresses.

See Adding a remote gateway.

Add two AutoIKE key tunnels with the same settings and add one of the remote gateways to each tunnel.

See Adding an AutoIKE key VPN tunnel.

Add two outgoing encrypt policies.

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D-Link DFL-500 user manual Configuring IPSec redundancy