DSL serving a webpage on a port other than 80
 

I found a nice workaround at www.dslwebserver.com

Seems as though most isp's are now blocking port 80
This makes serving a webpage from home impossible, especially with a westell modem which can only be configured by verizon.
using domain fowarding and zone file edits, you can send it to your server without having to type in the port number.

You should look at no-ip.com and dyndns.com, which are two of the bigger DNS providers for us simple folks.

But there are literally hundreds, if not thousands, of smaller DNS providers out there.