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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.

Phase 2 Options

Type

The two proposal method options are ESP or AH. Only ESP is supported at this time.

Authentication

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.

  • MD5
  • SHA1
  • SHA2-256
  • SHA2-384
  • SHA2-512

SHA2 is not supported on XTM 21, 22, 23, 505, 510, 520, 530, 515, 525, 535, 545, 810, 820, 830, 1050, and 2050 devices. The hardware cryptographic acceleration in those models does not support SHA2. All other models support SHA2.

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.

Encryption

Select an encryption method. The options are listed from the most simple and least secure, to the most complex and most secure.

  • DES
  • 3DES
  • 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.

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