knockd: A port-knocking server

IInfo.png projhp.png wikart.png
(auf gut Glück) (meist engl.) (falls vorhanden)

Zusammenfassung (meist engl.)
It listens to all traffic on an ethernet (or PPP) interface, looking for special "knock" sequences of port-hits. A client (package knock) makes these port-hits by sending a TCP (or UDP) packet to a port on the server. This port need not be open -- since knockd listens at the link-layer level, it sees all traffic even if it's destined for a closed port. When the server detects a specific sequence of port-hits, it runs a command defined in its configuration file. This can be used to open up holes in a firewall for quick access. Authors: -------- Judd Vinet <>
Installieren: knockd.jpg Status: knockd.png Umfang:30 KiB