TailScale

Tailscale Inc. is a software company with a freemium business model based in Toronto, Canada. It was founded in 2019 and is headquartered in Ontario. Tailscale provides an open-source software defined mesh virtual private network (mesh network VPN) software and a web-based management service.[a][1][2] The company provides a zero config mesh VPN service under the same name.... The open-source software acts in combination with the management service to establish peer-to-peer or relayed VPN communication with other clients using the Wireguard protocol. If the software fails to establish direct communication it falls back to using relays provided by the company. The IPv4 addresses given to clients are in the Carrier-grade NAT reserved space. This was chosen to avoid interference with existing networks. The configuration also allows routing of traffic to networks behind the client on some clients. https://en.wikipedia.org/wiki/Tailscale https://tailscale.com/

Jun'2022: Today we’re delighted to introduce Tailscale SSH, to more easily manage SSH connections in your tailnet. Tailscale SSH allows you to establish SSH connections between devices in your Tailscale network, as authorized by your access controls, without managing SSH keys, and authenticates your SSH connection using WireGuard.