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Collection of open source security tools that enhance the ability of people and companies to secure their environment. These tools will build upon the foundation laid by the security community.
l2tpknock is an add-on plugin for l2tpns servers or clusters and is intended to perform the rule of the port knocking idea, but with l2tp vpns, specifically, the l2tpns project.
A Port Knocking C-based server & client. Stealth mode by closed ports, strong encryption (ARC4 & BlowFish), Daemon mode, compresed sequence, MD5 digest log check, user passwords and user privelege system, action triggers... GPL license.
ip-session gets info of network trafic, such as sip, dip, sport, dport, etc. from linux kernel; gets account info of each traffic, such as in/out bytes/pkgs, etc.; else, gives session management function, such as query/del, etc.
brutesshd is an application written in c/php in order to prevent bruteforce attacks through ssh. Brutesshd uses iptables/pfctl tools to block this type of attacks
deface-no-tnx is an anti-defacement system that monitors your Web files and notifies you about unallowed changes. It also replaces the defaced page with a standard "error" page,so that no offensive/joking content can be frauodolently added to your site
TuxGuardian is an application-based firewall with a graphical interface. It's main task is to control and forbid transmission & reception of data by unauthorized applications; it can be thought as the Linux equivalent to apps such as ZoneAlarm and Kerio
CRYPT extension for Netfilter/Iptables allows you to create an encrypted communication using stream and block ciphers. It also authenticates the packets.
Documents for developers of Peer-to-Peer applications that need to be able to communicate across middleboxes such as firewalls and network address translators, and software tools for testing middleboxes for P2P friendliness.
netadm project provides monitoring tools for network performance and network control system. the above monitoring tool is called 'npt(Network Perfermance Tool) and the above network control system is called 'gwc (GateWay Control~). npt program provide
syndetector is a software which can detect and drop packet when a synflood attack is detected ! Based on a simple detection system (by the use of iptables and libipq) and on a simple use It is realy easy to setup this software.
Allows users of a Linux workstation to control which programs access the Internet. This can be done statically by listing them in a file or dynamically via a GUI dialog box that appears when a new program attempts to connect to the Internet.
Crowd Control is an small, cross-platform HTTP proxy (a fork of the elhttp project) designed for systems with little RAM, such as a home router. It can filter URLs using SquidGuard blocklists, and has the unique ability to filter HTTPS domains as well.
nf-HiPAC is a high performance packet filter for Linux. It provides the same rich feature set as iptables but uses an advanced algorithm to minimize the number of memory lookups per packet.
The Knock Project is a collection of security tools providing increased client/server authentication. The server and its functionality is provided by the netfilter kernel interface. Included are the daemon, a GNU/Linux client and a Windows client.
The goal of WallFire is to build a very general and modular firewalling application based on netfilter or any kind of low-level framework. It will provide a multi-language API, command line and interactive tools as well as X11 or HTML front-ends.
The doorman guards the door of a server, manipulating firewall rules to admit only recognized parties.
Allows Silent Running - a server with all ports CLOSED.
Linux-BSD-OSX server & client; C source & docs + Windows client binary. GPL.