Thanks Kolla, I got it now, I think. Some Amiga TCP stacks use static addressing only, so they need to be told where to look for addresses "outside" the local network, like the internet.
Otherwise they just dumbly use the same default settings for accessing IP addresses off of the local network that the default settings use. You HAVE to tell them where to look such places up, one way or the other. Otherwise they just won't work as you expect.
Am I right? Or at least on the right lines here? This is where Roadshow clicks with people, because it prompts for the person setting up, about setting where the TCP stack needs to be set to lookup addresses, I guess. Manually configuring it will work with ANY AmiTCP stack, but if you assume dynamic addressing, you are in a world of pain with some Amiga TCP/IP distributions. Age is no guarantee of fitness for purpose for noob network engineers like me. Even if the do have a GUI, most solutions don't guide you and prompt you to put in the right answers in the right places. They just assume you know about networks enough to give the TCP stack the right network routing to navigate to places, on local networks, or remote networks.