How to access a site you host from within your own network?
Some DSL/Cable routers don't allow these types of loopback connections (when a 'public' URL refers to a device on your LAN) so you may need to find one that does. The Draytek 26xx/28xx/2820 range definitely do.
Add the appropriate entry to whatever local DNS server your local network is using. If your local network isn't using one, then set one up.