Split Horizon DNS

In a previous article I got local DNS up and running so that I could connect to all of my self hosted services via their names instead of their IP address and port numbers. Today, I’m going to setup what’s known as “Split Horizon DNS.” Split Horizon DNS Split Horizon DNS is the practice of returning different DNS information for a host based on where that host asks for the information from.On my home network, my local DNS server was already configured to resolve the names of the various hosted services I have to their respective IP addresses. When I’m not at home, I would still like to access those services, but I will need them to resolve to different IP addresses. Since I’m running Tailscale to allow me to connect to my home network remotely, I can use the tailscale IP of the box that’s running Caddy as the main entry point for all my services. In the DNS settings of my DNS provider I need to add A records for each service and point them to the tailscale IP address of the server…