Port Knocking with knockd and Linux - Server Hardening - eviltoast
Port knocking is like a secret handshake or magic word between client and server. It can be used in various ways, but most commonly as a security feature to deny all contact to a specific service - li

I’ve created a new article about Port Knocking in preparation of my rework of the SSH Hardening guide.

I’d like to hear your opinion about port knocking.