Sorry for the double-post, it won't let me edit it...
Okay...I literally did the steps again - including checking my Firewall and checking the cmd.exe again, per Drgiggles1 - and it's still not open...
Going to try a different port...
EDIT: Tried a different port. Now the PortChecker program is saying that I am open, but it wasn't "able to ping" my computer. Is that a problem?
...And the site is still saying I'm firewalled.
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