Stay positive. If these are the biggest issues you run into, then you are fine. Basically Microsoft has reduced the key ports one needs to function well to the outside. 80, 443 and 987 for Sharepoint. One used to have to use port 3389 and, if you checked in the morning, there may be 5,000 or more hackers knocking on your door. This is because 3389 was the well known RDP port. Plus, you have to forward it to 3390, 3391 for every computer. Now, RDC uses 443 to traverse over HTTPS for an SSL connection. This connects to an RD Gateway on the server, which allows you to get to all of the other computers that the admin has given you permission to access. This is another example of centralized management.
So, you wouldn't be able to use an RDC client on a remote computer if 443 is not open. Are you able to access the Internet? And, if so, can you access your online banking or other secure site?
If you continue to have issues even manually, try picking up an inexpensive router that is on the list. The URL on my post above works now and shows all the ones that work. I know you say it is enabled. Then something else must be blocking it, but I don't know what that would be. You may need to reboot the server and/or reboot the router, the latter being more likely. You can run a small utility called TCP View from Systernals and see if 443 or https are open.
Finally, a tip I should have mentioned earlier. When SBS 2011 asks for a user name to be the admin, do NOT use admin or administrator or any likely username. Use a username that wouldn't be obvious. Your password should be at least 8 characters and contain at least one lowercase, one uppercase and one number preferably not at the beginning or end. The password should NEVER be given out to anyone even someone who arrives early or something to that effect. It can be written down but not on a sticky note on the monitor. You can put it at your house as a best bet. Or, write it down in code.
