NetBSD/i386 Firewall Project  
   Free firewall solution for people with a permanent Internet connection (e.g., xDSL or cable modem). Packet filtering firewall and NAT based on NetBSD.
   http://www.dubbele.com

Winproxy by Ositis Software  
   Network Address Translation, firewall, and modem sharing. Runs on Windows NT/95/98. Recently purchased by Blue Coat.
   http://www.winproxy.com

SINUS Firewall Page  
   Free TCP/IP packet filtering firewall for Linux. IP, TCP, UDP, ICMP and IGMP packet filtering. Dynamic rules including time-outs. Graphical management interface.
   http://www.ifi.unizh.ch/ikm/SINUS/firewall/

IP Filter  
   Free Linux TCP/IP packet filter, suitable for use in a firewall environment. Presently incorporated in FreeBSD, OpenBSD and NetBSD.
   http://cheops.anu.edu.au/~avalon/

tummy.com, ltd.  
   Linux-based firewalls and IsinGlass, is a script meant to make the average user's Linux machine more secure when connected to the Internet, for example, when dialing up via a local ISP.
   http://www.tummy.com/isinglass/

DoorStop  
   Macintosh based server-level and personal-user level software firewall, providing IP address based protection for TCP-based services.
   http://www.opendoor.com/doorstop/

Ashley Laurent VPCom  
   Integrated firewall, VPN and intrusion detection. Appliance or software product. Bandwidth control, and OEM embedded and client software. Up to T3 capable.
   http://www.ashleylaurent.com

Aker Security Solutions  
   Aker Firewall, a stateful packet filtering firewall for linux and FreeBSD. Integrages with Acker's Crypt server and client for VPN connections.
   http://www.aker.com.br

Secure Computing  
   ICSA certified SecureZone and Sidewinder firewalls and application gateways. Embedded VPN capability. Integrates with Strikeback IDS product.
   http://www.securecomputing.com

Trustix AS  
   Developers of the XSentry firewall and Trustix Secure Linux. Security science and research.
   http://www.trustix.com/

Sygate  
   Internet security and access solutions from PCs to medium networks. Protocol-based packet filtering firewall products.
   http://www.sygate.com/

InnerTek Software  
   Creators of the fBuilder firewall configuration utility for Linux. Includes services, product range, client intranet, screenshots, a profile, and forums.
   http://www.innertek.com

Kerio Technologies UK Ltd.  
   Personal and corporate firewalls and secure mailserver solutions. Product details, customer references and on-line store.
   http://www.kerio.co.uk/

SentryPoint  
   Software Internet Security Company. Host based centrally managed Firewall and pro-active intrusion prevention system.
   http://www.sentrypoint.net

PortsLock  
   Firewall that offers user-level access controls for Windows NT/2000/XP and Windows 2003 Server. It integrates with the Windows user authentication system.
   http://www.portslock.com/

GNAT Box  
   ICSA certified appliance-based or software-based firewall. Simple, easy to configure and high-performance. Supports most applications and IPSec-based VPN's.
   http://www.gta.com

Novell BorderManager  
   ICSA certified firewall for Novell networks. Directory-based user access to intranet and Internet content.
   http://www.novell.com/products/bordermanager/

Smoothwall Limited  
   Corporate server, a linux based, stateful inspection software firewall. Plugin modules available to add VPN and web filtering functions. Customer case studies and option to buy online.
   http://www.smoothwall.net

Livermore Software Laboratores, Intl.  
   Providing the PORTUS products for over ten years with a perfect security record. Offers Gigabyte+ levels of performance, and is scalable from the smallest business to worldwide organizations.
   http://www.lsli.com

Gateway Guardian  
   OEM Software and hardware for creating firewall and VPN appliances by Merilus. Includes a profile, product range, software downloads, and technical support.
   http://www.netmaster.com

Phion Information Technologies  
   Security gateways designed to set new standards in security, connectivity and management flexibility in the enterprise security market. Netfence systems are not just security gateways but intelligent traffic managers providing exceptional connection intel
   http://www.phion.com

Simple OpenBSD Firewall Interface  
   complete firewall solution for OpenBSD with many features, all of which are accessible through a web interface.
   http://sofi-firewall.sourceforge.net

Clavister security Products  
   Offers both software and appliance format firewall and VPN solutions as well as support and training..
   http://www.clavister.com/

LinuxMagic VPN Firewall  
   VPN FireWall, using the highest level of encryption, and industry standard IPSEC technology, ensures that no one can snoop your passwords or sensitive data, without paying the costs of expensive routers and dedicated networks.
   http://www.linuxmagic.com/vpn/index.html

BizGuardian firewall  
   Customized FreeBSD based software solution to turn a Pentium class computer into a firewall. Uses a web browser based administration and a 'wizards' type setup. Available with or without a VPN option.
   http://www.bizguardian.com/

Astaro: Integrated Perimiter Security Software  
   Astaro supplies integrated perimeter security software solutions that include firewall, VPN, virus, surf and spam.
   http://www.astaro.com/

Neuberger & Hughes Easygate  
   EasyGate can serve as a complete internet solution with a built-in firewall, mailserver, webserver, proxyserver, nameserver, PPTP for teleworking and IPsec for encrypted network linking. The product also comes solely as a firewall and VPN solution, withou
   http://www.easygate.net/EasyGate/Home

StoneGate High-Availability Firewall and VPN  
   An enterprise-class firewall with integrated VPN, high-availability and load-balancing. Load-balancing includes both connections and servers.
   http://www.stonesoft.com/products/StoneGate/

pf -- Daniel Hartmeier's packet filter  
   Pf is a modern packet filter with NAT capabilities. It is used in OpenBSD.
   http://www.benzedrine.cx/pf.html

Gibraltar Firewall  
   Debian/Linux based professional Firewall solution. Includes comfortable Webinterface and IPSec VPN.
   http://www.gibraltar.at

Securepoint Firewall Server  
   Securepoint Firewall Server free firewall system. The Securepoint Firewall Server is a high-performance, commercial-grade application designed to offer full protection for network assets.Also offerings in VPN, IDS and other entwork products.
   http://www.securepoint.cc

TeamF1, Inc. Software  
   Provides software solutions in embedded network security and management on embedded OSes such as vxWorks. FireFly for vxWorks product implements a small footprint robust firewall for use in residential gateways and other internet appliances.
   http://www.TeamF1.com

Projectfiles Firewall  
   Security resource and firewall software for Linux systems. Essays on security, forum, news and software support. (Bash) [Linux]
   http://projectfiles.com/firewall

Vicomsoft Firewall and Internet Security Software  
   Information, including FAQs, White Papers, Real-life situations and opportunities to download award-winning Firewall Software.
   http://www.firewall-software.com

Anaconda Firewall  
   Lindengrove Consultants Linux based firewall with a web based interface allows easy configuration the firewall's many features including IDS, multiple VPN connections, port forwarding, DMZ. Remote config via SSH.
   http://www.anacondafirewall.co.uk

The netfilter/iptables Project  
   Netfilter and iptables are building blocks of a framework inside the Linux 2.4.x and 2.6.x kernel that enables packet filtering, network addresss [and port] translation (NA[P]T) and other packet mangling. This enable use as a firewall and router.
   http://www.netfilter.org

Dolphinwall. The Dynamic Firewall  
   Installed in two configurations, firewall/central manager and peripheral firewall It includes stateful packet inspection, IDS, HTTP and SMTP proxies and antivirus capability. The firewall runs completely by CD-ROM and a USB pen-drive can be used for back
   http://www.dolphinwall.com

Check Point FireWall-1  
   ICSA certified Firewall-1. Operates on NT, Solaris, HP-UX, AIX, and RedHat Linux. Integrates with Check Point's VPN Gateway and RealSecure IDS products.
   http://www.checkpoint.com

FREESCO  
   A small free firewall router intended as a replacement for more costly commercial products. The name stands for FREE ciSCO.
   http://www.freesco.org/

InJoy Firewall  
   All-in-one multi-platform Firewall with next-generation deep packet inspection technology. Includes IPSec VPN, Internet gateway (NAT), remote management, IDS, virus protection and PPPoE. Supports Windows, Linux and OS/2. Has a personal version.
   http://www.fx.dk/firewall/

LEAF  
   The Linux Embedded Appliance Firewall, an application based on iptables, with a number of optional modules including logging and intrusion detection.
   http://leaf.sourceforge.net/

Lutel  
   Linux IPtables shell script written in bash for use as a stateful firewall and NAT/masquerade router for single or multiple subnets networks. It shares access to a internet connection from multiple workstations.
   http://firewall.lutel.pl/

InfoExpress  
   Makers of the CyberArmor layered security architecture personal firewall. Includes a profile, product range, product specifications, news, and software downloads.
   http://www.infoexpress.com

Falcon Firewall Project  
   UNIX/Linux open firewall project that intended to develop a free, secure and OS independent firewall system. Though discontinued the project site remains for historic reference.
   http://falcon.naw.de

The Firewall Toolkit (FWTK)  
   A set of proxies to build a firewall. Provides information and software on building free firewall and security solutions.
   http://www.fwtk.org/

Evidian NetWall  
   A manageable business-oriented firewall and VPN software solution to protect each IT zone according to its specific security requirements. DdMZ architecture allows tight control in compliance with overall business policy. Available overview, FAQs, Benefit
   http://www.evidian.com/security/netwall/index.htm

IDRCI Home Page  
   Providing a Stateful packet Inspection Firewall, Management Console and NAT capability for Windows servers. Downloads, documentation etc is available on the web site.
   http://www.idrci.net/

NetWolves  
   Provides a secure Internet gateway solution for LAN-to-Internet connectivity. Offers an ICSA-certified firewall and IPSec VPN with client VPN support and dynamic VPN routing as well as intelligent failover with high availability. Other filtering services
   http://www.netwolves.com

NetBoz Firewall  
   Working over standard FreeBSD services, provides flexibility, ease of use and performance to corporate networks. NetBoz is a live CD and does not use a hard disk, while all the settings are stored on a write-protectable diskette, making it virtually inmun
   http://www.netboz.net

IBM SecureWay Firewall  
   A mature product containing filtering, proxy, and circuit level gateway. Includes a Network Security Auditor, VPN IPSec support and disables unsafe applications, real-time performance statistics and log monitoring and central management capability. Availa
   http://www-306.ibm.com/software/security/firewall/

Easy Guard Server Protector  
   Server based, stateful packet inspection providing protection for TCP-based services such as web, database and e-mail servers. Links for purchase or download as well as additional IDS offering.
   http://www.easy-guard.com/

APF Firewall  
   A policy based iptables firewall system designed for ease of use and configuration. Includes information on the firewall, downloads and related articles and software.
   http://www.rfxnetworks.com/apf.php

HotSquid  
   A firewall/proxy cache with graphical configuration using a web-based front-end and proactive reporting.
   http://hotsquid.org

Chris Lowth Firewall and Filtering Tools  
   Open-source software for firewall and network traffic filtering including peer-to-peer applications.
   http://www.lowth.com/

IPCop Firewall Addons  
   A collection of binary addons for IPCop Firewall as well as some relevant site references.
   http://www.tom-e.de/

Bastion-firewall project  
   A netfilter-based firewall configurable through config files. May be used as a normal firewall or as a firewall script generator. Integrated with the Snort inline IDS.
   http://bastionfirewall.sourceforge.net

Open Source Firewall for Windows  
   First open source firewall for windows. Includes binaries and sources code. For Windows 2000 and later.
   http://programmerworld.net/personal/firewall.htm

Intoto Inc  
   iGateway Security solutions include ICSA certified Stateful Inspection Firewall integrated with NAT & ALGs, ICSA certified Virtual Private Network (VPN) and Network Intrusion Detection System (NIDS).
   http://www.intotoinc.com/products.html

Firestarter Linux Firewall  
   A graphical interfaced Open Source firewall for Linux.
   http://www.fs-security.com