WireGuard: Minimal VPN Tunnels with Cryptokey Routing
WireGuard is a small, explicit layer-3 encrypted tunnel that binds public keys, peers, and AllowedIPs, but it does not supply identity, device management, or a policy control plane.
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2 postsZeroTier: Virtual Networks with Controllers and Flow Rules
ZeroTier places devices on a managed virtual L2/L3 network, attempts peer-to-peer transport, and uses a controller to publish membership and policy; it resembles software-defined networking more than a single tunnel.