Most of what runs on your servers was never meant to be public: databases, dashboards, admin panels, internal APIs. Tailscale connects your machines into one private, encrypted network so they can talk to each other (and to you) while the public internet sees nothing. Here's what it is and how to wire up applications across multiple VPSs with zero open ports.

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Milan Jovanović

Tailscale lets you connect your servers, PCs, and other machines into a private encrypted mesh network (tailnet) built on WireGuard, so internal services like databases, dashboards, and admin panels are never exposed to the public internet. The guide walks through installing Tailscale on two VPS instances, binding Docker services (Postgres, Grafana, a .NET API) to tailnet IPs instead of 0.0.0.0, closing all public firewall ports including SSH, and connecting services across machines using stable private addresses. The result is zero open ports visible to the internet while retaining full internal connectivity from any device on the tailnet.

Build Your Own VPN With Tailscale