About:
knock is a server/client set that implements the idea known as port-knocking. Port-knocking is a method of accessing a backdoor to your firewall through a special sequence of port hits. This can be useful for opening up temporary holes in a restrictive firewall for SSH access or similar.

Release focus: Major feature enhancements

Changes:
This release adds the ability to change the knocking protocol (TCP/UDP) on a per-port basis using the knock client, a --lookup option for DNS lookups, support for one-time knock sequences, an Interface directive to select the listening interface, and support for excluding TCP flags with "!". The leftover/deprecated layer-2 MAC logic has been removed. Some memory leaks and potential security issues have been fixed. Packet filtering has been moved to kernel space with BPF filters.

Author:
Judd Vinet [contact developer]

Rating:	reset 1 2 3 4 5 6 7 8 9 10
8.45/10.00 (1 vote)

Tar/GZ:
http://www.zeroflux.org/knock/files/knock-0.5.tar.gz

Trove categories: [change]

[Development Status]		4 - Beta
[Environment]		Console (Text Based), No Input/Output (Daemon)
[Intended Audience]		System Administrators
[License]		OSI Approved :: GNU General Public License (GPL)
[Network Environment]		IP, IP :: IPv4
[Operating System]		POSIX :: Linux
[Programming Language]		C
[Topic]		Internet, Security, System :: Networking :: Firewalls

Dependencies: [change]
No dependencies filed

 Branches

Branch	Version	Last release	License	URLs
Default	0.5	29-Jun-2005	GNU General Public License (GPL)

 Releases

Version	Focus	Date
0.5	Major feature enhancements	29-Jun-2005 20:09
0.4	Minor feature enhancements	12-Jan-2005 12:38
0.3.1	Minor bugfixes	15-Sep-2004 09:03
0.3	Major feature enhancements	07-May-2004 20:40
0.2	Minor feature enhancements	15-Apr-2004 21:07
0.1	Initial freshmeat announcement	14-Apr-2004 12:05