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252 Fortinet Inc.
IPSec VPN concentrators IPSec VPN
VPN spoke general configuration steps
A remote VPN peer that functions as a spoke requires the following configuration:
• A tunnel (AutoIKE phase 1 and phase 2 configuration or manual key configuration)
for the hub.
• The source address of the local VPN spoke.
• The destination address of each remote VPN spoke.
• A separate outbound encrypt policy for each remote VPN spoke. These policies
allow the local VPN spoke to initiate encrypted connections.
• A single inbound encrypt policy. This policy allows the local VPN spoke to accept
encrypted connections.
To create a VPN spoke configuration
1 Configure a tunnel between the spoke and the hub.
Choose between a manual key tunnel or an AutoIKE tunnel.
• To add a manual key tunnel, see “Manual key IPSec VPNs” on page 233.
• To add an AutoIKE tunnel, see “AutoIKE IPSec VPNs” on page 235.
2 Add the source address. One source address is required for the local VPN spoke.
See “Adding a source address” on page 246.
3 Add a destination address for each remote VPN spoke. The destination address is the
address of the spoke (either a client on the Internet or a network located behind a
gateway).
See “Adding a destination address” on page 247
4 Add a separate outbound encrypt policy for each remote VPN spoke. These policies
control the encrypted connections initiated by the local VPN spoke.
The encrypt policy must include the appropriate source and destination addresses
and the tunnel added in step 1. Use the following configuration:
See “Adding an encrypt policy” on page 247.
5 Add an inbound encrypt policy. This policy controls the encrypted connections initiated
by the remote VPN spokes.
The encrypt policy for the hub must include the appropriate source and destination
addresses and the tunnel added in step 1. Use the following configuration:
Source The local VPN spoke address.
Destination The remote VPN spoke address.
Action ENCRYPT
VPN Tunnel The VPN tunnel name added in step 1. (Use the same tunnel for all encrypt
policies.)
Allow inbound Do not enable.
Allow outbound Select allow outbound
Inbound NAT Select inbound NAT if required.
Outbound NAT Select outbound NAT if required.
Source The local VPN spoke address.
Destination External_All