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What is a Route Based VPN?
In general, a Virtual Private Network (VPN) is a way fo
r companies to have the same security as if all the
distributed networks were together,
with only one access to the private network, or intranet. Each location has a firewall, configured specially so that it recognizes all the other firewall locations. When the firewall
sees a packet headed outward to another protected location, the packet is encrypted.

After it travels across the Internet, the receiving firewall then decrypts the packet.

A policy-based approach forces the VPN policy c
onfiguration to include the network topology
configuration. This makes it difficult for the netw
ork administrator to configure and maintain the VPN
policy with a constantly changing network topology.

With the Route Based VPN approach, network topology configuration is removed from the VPN policy
configuration. The VPN policy configuration creates
a Tunnel Interface between two end points. Static
routes can then be added to the Tunnel Interface. The Route

Based VPN approach moves network configuration from the VPN policy configuration to route configuration.

Benefits

Not only does Route Based VPN make configuring and maintaining the VPN policy easier, a major advantage of the Route Based VPN feature is that it provides flexibility on how traffic is routed. With this feature, users can now define multiple paths for overlapping networks over a clear or redundant VPN.

The Route Based VPN feature is supported on SonicOS 5.5 Enhanced and higher.

See this PDF

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