Tailscale is replacing the one-lane path through subnet routers
Subnet routers, app connectors and exit nodes run every stream through a single ordered pipeline today; multi-queue lands after v1.104, and netmap caching comes first.
Tailscale
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Tailcat is netcat over Tailscale's data plane, with no account and no control plane
Tailscale open-sourced tailcat, a netcat-like CLI and Go library that connects two machines over the same WireGuard and NAT-traversal stack as Tailscale, without an account, a control plane or any IP addresses.