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