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Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
...A fully custom network appliance operating system built from scratch over 20 years, now fully open source.
One ISO includes: firewall, VPN, web antivirus, URL filtering, SSL inspection, WAF, reverse proxy, load balancer and QoS.
Free for any number of users. Optional paid support available.
Sourcecode: https://github.com/cacheguard/CacheGuard-OS
Website: https://www.cacheguard.com/
OpenVPN is a robust and highly flexible tunneling application that uses all of the encryption, authentication, and certification features of the OpenSSL library to securely tunnel IP networks over a single TCP/UDP port.
Discussion forums and project wiki can be found here:
https://forums.openvpn.net/
http://community.openvpn.net/openvpn
Netdeep Secure is a Linux distribution with focus on network security.
Is a Next Generation Open Source Firewall, which provides virtually all perimeter security features that your company may need. It offers Web content filters, ensuring better performance of the network, allowing users to use the service efficiently and securely, providing a deep control of the use of the Web access service, blocking access to unwanted websites, Virus, Spam, Applications and intrusion attempts. Its...
Endian Firewall Community (EFW) is a "turn-key" linux security distribution that makes your system a full featured security appliance with Unified Threat Management (UTM) functionalities. The software has been designed for the best usability: very easy to install, use and manage and still greatly flexible.
The feature suite includes stateful packet inspection firewall, application-level proxies for various protocols (HTTP, FTP, POP3, SMTP) with antivirus support, virus and spam-filtering...
PeerGuardian - a privacy oriented firewall application
...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. Collaboration with peerblock.com is welcome!
PeerGuardian is an open project. Not only is its sourcecode open for you to read, use, and modify - but the project is open for you to join and contribute in any form (code, documentation, bug reports, web and support).
VTun is the easiest way to create Virtual Tunnels over TCP/IP networks with traffic shaping, compression, and encryption.
It supports IP, Ethernet, PPP and other tunnel types. VTun is easily and highly configurable.
VPN, Mobile IP, Shaping, etc
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...
Campagnol is a decentralized VPN over UDP tunneling. It uses UDP hole punching to open connections through NAT/firewall and OpenSSL's DTLSv1 implementation for mutual authentication and encryption.
Bi-directional Wireless Sensor Line Protocol(Bi-WSLP) is a sensor network communication protocol based on a line topology, which is common in outdoor monitoring cases for IoT(Internet of Things). Bi-WSLP runs fast and provides a response rapidly, yet it takes a small code size occupies small memory. Bi-WSLP can be easily ported to various hardware platforms because it is coded in C, which is the most popular programming language for embedded systems. In addition, Bi-WSLP allows transmission...
Plugdaemon is a tool that is inspired by, but not based on, programs like plug-gw. It was originally a simpler alternative, but the connection balancing code and other features makes it a lot more versatile.
Application proxy toolkit which inherits the ideology of TIS fwtk and maintains API backwards compatibility. The design goal is to make it simple yet powerful; no performance hacks allowed in the code and library dependencies are reduced to minimum.
The Kernel Intrusion Detection System-KIDS, is a Network IDS, where the main part, packets grab/string match, is running at kernelspace, with a hook of Netfilter Framework. The project is not ready for use, then incomplete pieces of code may be found.
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.
ISO 17799 - Code of practice for information security management. Creation of methodology and documentation for audit adapted to ISO. One is made up of an introduction on general aspects of the security of the information.