InfoWorld: Make sure that those back doors stay locked by using Linux-based… [pmfirewall]

“Pmfirewall is a free program that automatically configures a
Linux system as a firewall. For the most part, it just asks a
series of simple questions, such as whether or not you want people
to access an FTP server inside your firewall, and then creates a
firewall configuration script based on the answers.”

“Most people construct a firewall by using a utility called
ipchains to create a set of rules for how your server should direct
network traffic. Pmfirewall uses but doesn’t replace ipchains.
It simply relieves you of the tedious task of writing up the
ipchains’ firewall rules manually. And, because pmfirewall
does such an excellent job of that, I used it to replace the set of
ipchains’ rules that I had already created the hard way.”

“…because pmfirewall is released under the GNU GPL (General
Public License), you can examine the source code for yourself to be
sure it doesn’t create a back door opening to your network.”

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