Port knocking

Port knocking terimi önceden belirlenmiş portlara yapılan bağlantı isteklerine göre istenilen portların açılması tekniğidir.

Özellikle uzaktan yönetim servislerinde(ssh, rdp) kullanılan bu uygulama ile ilgili detaylı açıklama;

https://www.digitalocean.com/community/articles/how-to-use-port-knocking-to-hide-your-ssh-daemon-from-attackers-on-ubuntu

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