Linked by Thom Holwerda on Fri 7th Jul 2006 13:11 UTC, submitted by anonymous
"The first time I have seen the knockd project I liked it instantly. The idea is so simple, and though so effective. Knockd is a port-knocking application that silently runs on a server passively listening to network traffic. Once it will see a port sequence it has an action configured for it, it will run that action. We can see this as a remote control to our server: once we hit the right button it will take the appropriate action!"
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Member since:2005-07-06
Agreed.
Here is a brief writeup of doing this just in iptables:
http://www.debian-administration.org/articles/268
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Member since:
2005-11-11
You don't need a special program to do that. You only have to configure the rules straight into the iptables config. This knockd thing might make it easier, but it is most certainly not essentail for port knocking.