How can I use this as a home web server if my ISP blocks port 80?

"Don’t want the trouble of buying your own domain? Don’t worry. arkOS will allow you to connect your node to the Internet anyway, through a variety of services like dynamic DNS and port relays. Sometimes your Internet connection might prohibit you hosting your own data. In these circumstances, arkOS will provide ways to connect your node to the greater World Wide Web."

How does that work?