If that is your IP in the sql DB then yes, thats right. No, your conf files should say 127.0.0.1. And as long as you can play single player, you should be able to make it work over the net. Although there is a version floating around that will not let outside users connect. There is a hack for this though. I doubt you have it, but it is possible.
Try getting a no-ip address, and put that in the sql DB spot instead of your IP, unless it is static.
And if you are behind a router, you would need to port forward. Don't ask me how, I don't have this problem... do a search, there are tons of threads on it.