May I suggest removing this line (or having it configurable)?:

I ask as, while trying to get an All of Fabric 5 server up and running behind a proxy, this channel is not recognized and will automatically kick anyone attempting to connect. A proxy could theoretically open this channel and pass that information on, but by having this line the mod is effectively forcing a proxy developer to implement this functionality. It would be nice if there was some form of configurability that would not force this feature if it will not be used.

(Unless I am missing some form of configurability, which I do not doubt.)

Thank you for listening, and for all of the cool work you guys do!