On Phase 1 Transform Settings - Authentication Hash disappears when choosing GCM Encryption

Why does they 'Authentication' hash drop down disappear if I choose any of the GCM encryption types on the Phase 1 Transform screen?

*** compared with ***


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    Authentication and encryption occur simultaneously.

    When you select the one, it already knows the other.

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    james.carsonjames.carson Moderator, WatchGuard Representative
    edited July 2022

    The AES-GCM cipher suite(s) include authentication as a part of them, so selecting an additional authentication cipher is not necessary.

    Or rather, they specify one in and of themselves. If you could select a different authentication cipher, it would break the protocol, and would not work.

    -James Carson
    WatchGuard Customer Support

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