2 NAT devices may be complex but I have no idea how to achieve simple. (What does "NAT" mean?) I just follow orders (mfg install guide) and keep my head down and hope.

If I can connect with only a router and no modem, umm, doesn;t sound likely but maybe routers do ALL the work. I dunno. If going Modem without router, umm, sure, but then I can't build a network here. Which are you pointing to as simply better?

I already did the PORT 6346 and force IP thing. The only magic found has been the member suggestion to edit registry. Can you comment on that while I follow your other lead to static ip methods?