1) The MacTCP Control Panel setting for the "gateway address" does not have any
function in relation to the DDP/IP gateway used for TCP/IP encapsulation in
AppleTalk. The "gateway address" is used when MacTCP is talking native
TCP/IP over Ethernet. If your network does not have a RIP (Route
Information Protocol) process running on a router connected to the network,
the default gateway address is used to locate routes to "smart" gateways,
which might be connected to much larger outside networks, like the
Internet. Most BSD UNIX systems are capable of running a RIP process.
2) Yes, we support running TCP/IP encapsulated in AppleTalk over Ethernet,
Token Ring, or LocalTalk. The physical media does not play a large part in
the ability of an encapsulating protocol to function properly.