I have a need to for my 140D running FOS v6.0.4 to authenticate an interface to an upstream device via 802.1x. To be clear I need the the supplicant running on the FGT and authenticating the FGT, not a downstream client. After going through the CLI reference I'm pretty certain this is not possible. That said I've seen some seemingly far fetch scenarios worked out here so I thought I'd ask.
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