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.

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

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.

IP Filter
Free Linux TCP/IP packet filter, suitable for use in a firewall environment. Presently incorporated in FreeBSD, OpenBSD and NetBSD.

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.

DoorStop
Macintosh based server-level and personal-user level software firewall, providing IP address based protection for TCP-based services.

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.

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.

Secure Computing
ICSA certified SecureZone and Sidewinder firewalls and application gateways. Embedded VPN capability. Integrates with Strikeback IDS product.

Trustix AS
Developers of the XSentry firewall and Trustix Secure Linux. Security science and research.

Sygate
Internet security and access solutions from PCs to medium networks. Protocol-based packet filtering firewall products.

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

Kerio Technologies UK Ltd.
Personal and corporate firewalls and secure mailserver solutions. Product details, customer references and on-line store.

SentryPoint
Software Internet Security Company. Host based centrally managed Firewall and pro-active intrusion prevention system.

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.

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.

Novell BorderManager
ICSA certified firewall for Novell networks. Directory-based user access to intranet and Internet content.

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.

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.

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

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 intelligence.

Simple OpenBSD Firewall Interface
complete firewall solution for OpenBSD with many features, all of which are accessible through a web interface.

Clavister security Products
Offers both software and appliance format firewall and VPN solutions as well as support and training..

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).

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.

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.

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

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, without any extras.

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.

pf -- Daniel Hartmeier's packet filter
Pf is a modern packet filter with NAT capabilities. It is used in OpenBSD.

Gibraltar Firewall
Debian/Linux based professional Firewall solution. Includes comfortable Webinterface and IPSec VPN.

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.

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.

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

Vicomsoft Firewall and Internet Security Software
Information, including FAQs, White Papers, Real-life situations and opportunities to download award-winning Firewall Software.

TUNIX Firewall and Internet security
Information about the Tunix Firewall, based on the BSDi OS, support, documentation and other related materials.

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.

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.

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-up of the configuration.

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.

FREESCO
A small free firewall router intended as a replacement for more costly commercial products. The name stands for FREE ciSCO.

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.

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

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.

InfoExpress
Makers of the CyberArmor layered security architecture personal firewall. Includes a profile, product range, product specifications, news, and software downloads.

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.

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

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, Benefits, Whitepapers.

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.

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 are also available.

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 inmune to intrusions and power failures.

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. Available for MS Windows and AIX.

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.

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.

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

Chris Lowth Firewall and Filtering Tools
Open-source software for firewall and network traffic filtering including peer-to-peer applications.

IPCop Firewall Addons
A collection of binary addons for IPCop Firewall as well as some relevant site references.

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.

Open Source Firewall for Windows
First open source firewall for windows. Includes binaries and sources code. For Windows 2000 and later.