So, when you were kids, you might have had a secret knock sequence like "tap taptap tap" to open the club doors, so that only the kids that you like and who knew sequence could enter the club. Now port knocking is about trying to access a few ports in a specific sequence which could alert the firewall to execute some action on your desktop/server. It could be a shell script which monitors your iptables log file and executes a specific action on parsing a specific sequence of ports.
Some of the possible action that I can think of
(1) Open up ssh port on your Linux desktop so that you can access it remotely and
close it once you are done.
(2) start a backup of your hard drive.
(3) If you want to let some one inside your network without others noticing... :P
(3) ... and lot of other stuff shady also...
Seems interesting...
check out more here.
http://www.itworld.com/it-managementstrategy/98567/port-knocking
No comments:
Post a Comment