What it is: a firewall is a set of related programs, located at a network gateway server, which protects the resources of a private network from users of outside networks. A firewall, working closely with a router program, examines each network packet to determine whether to forward it toward its destination.
Company behind it: Red Hat Linux is an open source Linux operating system, derived from Unix, and the leading distribution in the United States.
Current version: 7.3.
What's up with the upgrade: Red Hat Linux Version X will likely ship in the fall 2002.
How it's doing internationally: There is a strong international community of dedicated Linux users who contribute to the source code, and prove that open source means business. Linux is an international OS, and the creator, Linus Torvalds, is from Finland.
How many people participate: Red Hat controls approximately 70% of the Linux market in the United States (IDC). Recent estimates on the number of Linux OS downloaded are approximately 20 million.
What's a firewall
TCP/IP quick start
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