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fwknop 2.5.1

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fwknop implements an authorization scheme called Single Packet Authorization that requires only a single encrypted packet to communicate various pieces of information, including desired access through an iptables, ipfw, or pf firewall policy and/or specific commands to execute on the target system. The main application of this program is to protect services such as SSH with an additional layer of security in order to make the exploitation of vulnerabilities much more difficult. The authorization server works by passively monitoring authorization packets via libpcap. Also supported is a robust port knocking implementation based around iptables log messages.

Release Notes: A bugfix in the fwknop client to reset terminal settings to orignal values after entering keys via stdin. A bugfix in the fwknopd daemon to not print a PID file existence warning. A test suite bugfix to not run an iptables Rijndael HMAC test on non-Linux systems.

Release Tags: Stable

Tags: Networking, Firewalls, Monitoring, Security

Licenses: GPL

Download Software page:
fwknop 2.5.1


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