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ProSafe Gigabit 8 Port VPN Firewall FVS318G Reference Manual
Virtual Private Networking 5-23
v1.1, August 2010
4. Click Apply to save your changes. The modified IKE policy is displayed in the List of IKE
Policies table.
Configuring VPN Policies
You can create two types of VPN policies. When using the VPN Wizard to create a VPN policy,
only the Auto method is available.
• Manual. All settings (including the keys) for the VPN tunnel are manually entered at each end
(both VPN Endpoints). No third-party server or organization is involved.
• Auto. Some settings for the VPN tunnel are generated automatically by using the IKE
(Internet Key Exchange) protocol to perform negotiations between the two VPN Endpoints
(the Local ID Endpoint and the Remote ID Endpoint).
In addition, a CA (Certificate Authority) can also be used to perform authentication (see
“Managing Certificates” on page 5-30). To use a CA, each VPN gateway must have a certificate
from the CA. For each certificate, there is both a public key and a private key. The public key is
freely distributed, and is used by any sender to encrypt data intended for the receiver (the key
owner). The receiver then uses its private key to decrypt the data (without the private key,
decryption is impossible). The use of certificates for authentication reduces the amount of data
entry required on each VPN endpoint.
The VPN Policies Screen
The VPN Policies screen allows you to add additional policies—either Auto or Manual—and to
manage the VPN policies already created. You can edit policies, enable or disable policies, or
delete them entirely. The rules for VPN policy use are:
1. Traffic covered by a policy will automatically be sent via a VPN tunnel.
2. When traffic is covered by two or more policies, the first matching policy will be used. (In this
situation, the order of the policies is important. However, if you have only one policy for each
remote VPN endpoint, then the policy order is not important.)
3. The VPN tunnel is created according to the settings in the SA (Security Association).
4. The remote VPN endpoint must have a matching SA, or it will refuse the connection.
To access the VPN Policies screen:
1. Select VPN from the main menu and Policies from the submenu. The Policies submenu tabs
appear with the IKE Policies screen in view (see Figure 5-18 on page 5-16).