Fortinet fortigate-50r Installationsanweisungen

In a hub-and-spoke network, all VPN tunnels terminate at a single VPN peer known as 
a hub. The peers that connect to the hub are known as spokes. The hub functions as 
a concentrator on the network, managing the VPN connections between the spokes. 

The advantage of a hub-and-spoke network is that the spokes are simpler to configure 
because they require fewer policy rules. Also, a hub-and-spoke network provides 
some processing efficiencies, particularly on the spokes. The disadvantage of a hub-
and-spoke network is its reliance on a single peer to handle management of all VPNs. 
If this peer goes down, all encrypted communication in the network is impossible.

A hub-and-spoke VPN network requires a special configuration. Setup varies 
depending on the role that the VPN peer is serving. If the VPN peer is a FortiGate unit 
functioning as the hub, or concentrator, it requires a VPN configuration connecting it to 
each spoke (AutoIKE phase 1 and 2 settings or manual key settings, plus encrypt 
policies). It also requires a concentrator configuration that groups the hub-and-spoke 
tunnels together. The concentrator configuration defines the FortiGate unit as the hub 
in a hub-and-spoke network. 

If the VPN peer is one of the spokes, it requires a tunnel connecting it to the hub (but 
not to the other spokes). It also requires policies that control its encrypted connections 
to the other spokes and its non-encrypted connections to other networks, such as the 
Internet. 

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A central FortiGate that is functioning as a hub requires the following configuration:

• A tunnel (AutoIKE phase 1 and phase 2 configuration or manual key configuration) 

for each spoke. 

• Destination addresses for each spoke.
• A concentrator configuration.
• An encrypt policy for each spoke.