Add a Phase 1 Transform

You can define a tunnel to offer a peer more than one transform set for negotiation. For example, one transform set might include [SHA2-256]-[AES256]-[DF14] ([authentication method]-[encryption method]-[key group]) and a second transform might include [SHA1]-[AES128]-[DF2], with the [SHA2-256]-[AES256]-[DF14] transform as the higher priority transform set. When the tunnel is created, the Firebox can use either [SHA2-256]-[AES256]-[DF14] or [SHA1]-[AES128]-[DF2] to match the transform set of the other VPN endpoint. You can add a maximum of nine transform sets.

For more information about these options, go to About IPSec Algorithms and Protocols.

You can configure an IPSec BOVPN to use IKEv1 or IKEv2. IKEv2 is supported in Fireware v11.11.2 and higher.

  • For a BOVPN that uses IKEv1, you must specify Main Mode in the Phase 1 settings to use multiple transforms.
  • For a BOVPN that uses IKEv2, phase 1 transforms are shared for all IKEv2 gateways that have at least one remote gateway with a dynamic IP address. For more information, go to Configure IKEv2 Shared Settings.

In Fireware v12.10 and higher, Fireware supports Diffie-Hellman Group 21.

Related Topics

Configure IPSec VPN Phase 1 Settings

Configure Manual BOVPN Gateways

Define Gateway Endpoints for a BOVPN Gateway