Define Advanced Phase 2 Settings
In the advanced Phase 2 settings, you can change the Phase 2 proposal type, authentication method, encryption method, and expiration settings. For more information about the available algorithms, see About IPSec Algorithms and Protocols.
- On the Edit Mobile VPN with IPSec page, select the IPSec Tunnel tab.
- In the Phase 2 Settingssection, click Advanced.
The Phase 2 Advanced Settings appear.
- Configure the Phase 2 options as described in the subsequent section. We recommend that you use the default settings.
- Click OK.
- Click Save.
- In the Edit Mobile VPN with IPSec dialog box, select the IPSec Tunnel tab.
- Click Proposal.
The Phase2 Proposal dialog box appears.
- Configure the setting options as described in the subsequent section. We recommend that you use the default settings.
- Save the configuration to the Firebox.
Phase 2 Options
The two proposal method options are ESP or AH. Only ESP is supported at this time.
Select an encryption method from the drop-down list. The options are listed from the most simple and least secure to the most complex and most secure.
SHA2 is not supported on XTM
SHA2 is supported for VPN connections from the Shrew Soft VPN client v2.2.1 or higher, or the WatchGuard IPSec Mobile VPN client v11.32. SHA2 is not supported for VPN connections from Android or iOS devices, and is not supported by older versions of the Shrew Soft or WatchGuard IPSec VPN clients.
Select an encryption method. The options are listed from the most simple and least secure, to the most complex and most secure.
- AES (128-bit)
- AES (192-bit)
- AES (256-bit)
Force Key Expiration
To force the gateway endpoints to generate and exchange new keys after a quantity of time or amount of traffic passes, configure the settings in the Force Key Expiration section.
- Select the Time check box to expire the key after a quantity of time. Type or select the quantity of time that must pass to force the key to expire.
- Select the Traffic check box to expire the key after a quantity of traffic. Type or select the number of kilobytes of traffic that must pass to force the key to expire.
- If both Force Key Expiration options are disabled, the key expiration interval is set to 8 hours.