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Solved
Port Forwarding, firmware V1.4.1.50_1.3.10
Attempting two forward two ports, 3389 for RDP and 9000 for accessing a security DVR. Was working through previous routers, verified still working internally. From the router, Advanced->Setup->LAN Se...
End result: Lightband (my new ISP) uses a double-NAT for residential accounts, with no provisions for forwarding port requests through. I know it can be done (I've done it), but that would be a lot of grief for them to manage. I guess the upside is for all of those poorly protected home systems, this does make for a major headache for the script-kiddies out there.
End solution for me, my account was moved over to the commercial side. Everything IMMEDIATLY started working correctly. As I was not aware of the new ISP (or any other provider) doing a double-NAT, it never occurred to me. When I set up a second router that I know worked properly but would not forward the ports, something else was going on.
What's that line about ASS U ME? Dat be me, today!
Ah, the plot thickens! While my ISP does not block any ports, they DO use a "doublel-NAT" configuration for residential accounts. Stay tuned ... same bat-time ... same bat-channel!
Yes, I am THAT old.
End result: Lightband (my new ISP) uses a double-NAT for residential accounts, with no provisions for forwarding port requests through. I know it can be done (I've done it), but that would be a lot of grief for them to manage. I guess the upside is for all of those poorly protected home systems, this does make for a major headache for the script-kiddies out there.
End solution for me, my account was moved over to the commercial side. Everything IMMEDIATLY started working correctly. As I was not aware of the new ISP (or any other provider) doing a double-NAT, it never occurred to me. When I set up a second router that I know worked properly but would not forward the ports, something else was going on.
What's that line about ASS U ME? Dat be me, today!
> End result: Lightband (my new ISP) uses a double-NAT for residential
> accounts, [...]https://en.wikipedia.org/wiki/Carrier-grade_NAT
That's why it's "1" in the list of "the usual problems with this
stuff".