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.
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