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CacheGuard Gateway is a UTM, a WAF, and a QoS management appliance.
CacheGuard Gateway is a free and open-source Unified Threat Management (UTM) solution, a Web Application Firewall (WAF), and a Quality of Service (QoS) platform designed to optimize WAN traffic. To obtain a CacheGuard Gateway appliance, download CacheGuard-OS and install it on the bare-metal or virtual machine of your choice. It’s that simple and completely free.
The UTM includes a firewall, web antivirus, VPN server, and a URL-filtering and SSL-inspection web proxy. The WAF operates in...
...Using Bayes, RBLs, Spamassassin, MailScanner, ClamAV. Based on Debian. Enterprise ready.
MailCleaner is an anti spam gateway installed between your mail infrastructure and the Internet.
It includes a complete GNU/LinuxOS and a graphical web interface for user and administrative access. It comes in the form of virtual machine templates..
- fully compatible with any SMTP mail server (Exchange, Zimbra, O365,...)
PeerGuardian - a privacy oriented firewall application
...It blocks connections to and from hosts specified in huge blocklists (thousands or millions of IP ranges). Its origin seeds in targeting aggressive IPs while you use P2P.
PeerGuardian Linux:
Not developed actively anymore. Team might still be around. Some unreleased changes on git. Outdated technology.
Peerguardian OS X:
Not developed anymore. We've lost contact with the OS X developer.
PeerGuardian Windows:
Not developed anymore. It's highly recommended to use PeerBlock instead, which is a continuation of PeerGuardian's development in Windows, with bug fixes and support for Windows Vista and Windows 7. ...
Those who have read past the "Malware" warning can be assured there is absolutely no malware in this OS or in the download. This warning comes from the "netcat" binary included in the download as a DOS time client. Unfortunately netcat has code that is flagged as malware.
FREESCO, a NAT/firewall router/server based on Linux and runs on a single 1.44MB floppy. Freesco is very powerful and versatile and can connect multiple home or small office networks to most types of Internet connections including dialup.
Software system for FlowScreen Router, with SempGate FPGA firmware and Intel EP80579 based board, it implements a high performance (1.5M pps network traffic) router system with open architecture for 3-rd party network application development.
LogCop is a set of turn-key bash/firewall/awk scripts for enhancing an IDS. It monitors system logs and blocks IP addresses based on such criteria as illegal user names from repeated attacks. In production under Linux, FreeBSD, OS X, Solaris.
The SWAP (Secure Wireless Access Point) project is intended for use in embedded appliances. These appliances will operate in the role of a WEP (wireless encryption protocol) and IPSEC enabled wireless access point, IPSEC VPN gateway, and firewall.
Krome Shield is designed to fool remote fingerprinting tools (using ICMP & TCP), making them think you're running a different OS. It runs under Linux, using the netlink device and ipchains. In the future it will act like an IDS too, detecting attacks a
The IP Personality project is a patch to the Linux kernels that adds netfilter features: it enables the emulation of other OSes at the network level, thus fooling remote OS detection tools such as nmap that rely on network fingerprinting.
The software package repository for <a href=http://sourceforge.net/projects/fsos>FsOS</a>, including EP80579 drivers, SempSec drivers, linux kernel patches and a lot of porting applications for FsOS