Hi Dick,
Not sure why Elecraft has that in their manual. I suspect it was an attempt to be "idiot proof", since a setting of "both" has no
negative effect and the user does not have to understand protocols. It is neither right nor wrong, but is not necessary.
Since not all routers have the setting "both", my instructions provide only the correct protocol used, otherwise believe that I
would run into problems with support if I were to tell people to use "both" and they don't find this in their router.
The bridge is a bridge, not a router. It acts the same as a wireless network card in your PC and just connects a device to
a wireless network, rather than using ethernet. This has nothing to do with port forwards, a network card is agnostic.
73,
Mitch DJ0QN / K7DX