TAILCAT

Summary from the TLDR DevOps newsletter

Tailcat is a userspace networking tool that reuses Tailscale's WireGuard data plane without requiring the Tailscale control plane, account, root access, or routing-table changes. Two peers exchange a short connection token out of band, bootstrap through DERP, and then upgrade to a direct peer-to-peer UDP path when NAT traversal succeeds. It can also tunnel TCP ports, SSH, SOCKS5 traffic, and exit-node access.