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Add an L2TP IPSec 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 SHA1-DES-DF1 ([authentication method]-[encryption method]-[key group]) and a second transform might include MD5-3DES-DF2, with the SHA1-DES-DF1 transform as the higher priority transform set. When the tunnel is created, the Firebox can use either SHA1-DES-DF1 or MD5-3DES-DF2 to match the transform set of the other VPN endpoint.

SHA-2 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 SHA-2. All other models support SHA-2.

You can include a maximum of nine transform sets.

See Also

Configure IPSec VPN Phase 1 Settings

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