Blic,
Thanks for posting. Actually, I finally go things working a couple of days ago.
After a bunch of internet research, I learned that the Verizon/Actiontec router frequently needs to be rebooted in order for the port forwarding instructions to become effective. It is a bug and no one seems to know why this is sometimes necessary.
In my case, when I rebooted the router completely froze and I had to do a factory reset as well. Then I had to add the port forwarding instructions again, port by port (and not as a range). It worked.
Coincidentally, I ended up with the same port situation you have. Only port 49250 shows as open, but that is sufficient. Hopefully, this information will help others with the same gateway/router.
Best, Alex