You can have an A record for example.com that points at a local network address. The server itself may only be accessible inside your network, but the dns will be available anywhere. Run your own dns server and tell your router to use it as the default resolver for your network. Maybe mDNS could suit your needs for .local domains.
How to Configure Local Network Area: 9 Steps (with Pictures) Aug 08, 2018 fix problem "local only" when connection is across a May 02, 2012 How to Use Plex Media Server Without Internet Access
@d_inevitable For one, it's not the only answer and it's not otherwise indicated as the correct one. It's the one I would have chosen, but this is why I thought it'd be useful to migrate this question. It might also help to include general directions, or a helpful link, on configuring SSH between two local machines. – klenwell Mar 25 '12 at 18:43
How to Use Plex Media Server Without Internet Access Mar 19, 2020 Set up and manage Windows 10 HomeGroup on a local network
Identify Network Hardware IP Addresses on Local Network
@d_inevitable For one, it's not the only answer and it's not otherwise indicated as the correct one. It's the one I would have chosen, but this is why I thought it'd be useful to migrate this question. It might also help to include general directions, or a helpful link, on configuring SSH between two local machines. – klenwell Mar 25 '12 at 18:43 You need to specify allow the incoming connections through port forwarding. If you want to connect to the PC through the same network i.e. both tablet and PC are connection to the same local area network, you don't need to worry about outside users connection to the PC from the Internet since the NAT device (the router) won't allow it by default. Apr 30, 2019 · This helps keep your server, computer, and network safe, because only authorized access is allowed by default. Related Page: Remote Access and Server Sharing. In rare cases, you may decide that you wish to allow very specific access from the local network without authentication.