Planning your VPN
It is a good idea to plan the VPN configuration ahead of time. This will save time later and be help you configure your VPN correctly.
All VPN configurations comprise a number of required and optional parameters. Before you begin, you need to determine:
• where does the IP traffic originate and where does it need to be delivered
• which hosts, servers, or networks to include in the VPN
• which VPN devices to include in the configuration
• through which interfaces the VPN devices communicate
• through which interfaces do private networks access the VPN gateways
Once you have this information, you can select a VPN topology that meets the requirements of your situation.