Fortinet FortiGate 50A User Manual download pdf (Page 183)

IPSec VPN AutoIKE IPSec VPNs

FortiGate-50A Installation and Configuration Guide 183

General configuration steps for an AutoIKE VPN

An AutoIKE VPN configuration consists of phase 1 and phase 2 configuration

parameters, the source and destination addresses for both ends of the tunnel, and an

encrypt policy to control access to the VPN tunnel.

To create an AutoIKE VPN configuration

1 Add the phase 1 parameters. See “Adding a phase 1 configuration for an AutoIKE

VPN” on page 183.

2 Add the phase 2 parameters. See “Adding a phase 2 configuration for an AutoIKE

VPN” on page 188.

3 Configure an encrypt policy that includes the tunnel, source address, and destination

address for both ends of the tunnel. See “Configuring encrypt policies” on page 193.

Adding a phase 1 configuration for an AutoIKE VPN

When you add a phase 1 configuration, you define the terms by which the FortiGate

unit and a remote VPN peer (gateway or client) authenticate themselves to each other

prior to establishing an IPSec VPN tunnel.

The phase 1 configuration is related to the phase 2 configuration. In phase 1 the VPN

peers are authenticated; in phase 2 the tunnel is established. You have the option to

use the same phase 1 parameters to establish multiple tunnels. In other words, the

same remote VPN peer (gateway or client) can have multiple tunnels to the local VPN

peer (the FortiGate unit).

When the FortiGate unit receives an IPSec VPN connection request, it authenticates

the VPN peers according to the phase 1 parameters. Then, depending on the source

and destination addresses of the request, it starts an IPSec VPN tunnel and applies

an encrypt policy.

To add a phase 1 configuration

1 Go to VPN > IPSEC > Phase 1.

2 Select New to add a new phase 1 configuration.

3 Type a Gateway Name for the remote VPN peer.

The remote VPN peer can be either a gateway to another network or an individual

client on the Internet.

The name can contain numbers (0-9), uppercase and lowercase letters (A-Z, a-z), and

the special characters - and _. Other special characters and spaces are not allowed.

Note: Prior to configuring an AutoIKE VPN that uses digital certificates, you must add the CA

and local certificates to the FortiGate unit. For information about digital certificates, see

“Managing digital certificates” on page 190.

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Fortinet FortiGate 50A User Manual Page 183