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I can finally talk about this, 3 years later... github.com/tailscale/ta... It's a library + CLI tool that's like netcat, but over Tailscale's data plane without any control plane (no accounts, no dependence on Tailscale the company, all open source) WireGuard + NAT traversal without IP addresses.

github.comGitHub - tailscale/tailcat: like netcat, but over Tailscale's data plane, without Tailscale's control planelike netcat, but over Tailscale's data plane, without Tailscale's control plane - tailscale/tailcat

Uuuuh, neat! Would it be easy enough to add 32 bytes of WireGuard PSK and get some degree of post-quantum protection, since these are already secret tokens? I am growing uncomfortable with Tailscale's lack of harvest-now-decrypt-later protection against QCs.

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