wok-current diff knock/description.txt @ rev 25256
updated qrencode and qrencode-dev (4.0.2 -> 4.1.1)
author | Hans-G?nter Theisgen |
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date | Fri Jul 15 06:38:49 2022 +0100 (2022-07-15) |
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1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/knock/description.txt Fri Jul 15 06:38:49 2022 +0100 1.3 @@ -0,0 +1,10 @@ 1.4 +Knockd is a port-knock server. 1.5 +It listens to all traffic on an ethernet (or PPP) interface, looking 1.6 +for special "knock" sequences of port-hits. 1.7 +A client makes these port-hits by sending a TCP (or UDP) packet to a 1.8 +port on the server. This port need not be open -- since knockd listens 1.9 +at the link-layer level, it sees all traffic even if it's destined for 1.10 +a closed port. 1.11 +When the server detects a specific sequence of port-hits, it runs a 1.12 +command defined in its configuration file. This can be used to open up 1.13 +holes in a firewall for quick access.