MFA Firewall Knocker

Self-hosted port knocking gated by a passkey: opens a firewall rule only after WebAuthn login.

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MFA Firewall Knocker is a free, self-hosted control plane that keeps an admin port like SSH or RDP closed by default and opens a per-IP firewall rule, which expires automatically, only after the user authenticates with a WebAuthn passkey. It works alongside an existing SSH or WireGuard setup without replacing it, aimed at administrators who need a small, auditable multi-factor gate on remote access for security or compliance reasons.

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