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Linux Productivity Magazine: IPTables

May 15, 2003, 08:30 (0 Talkback[s])
(Other stories by Steve Litt)


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[ Thanks to Steve Litt for this link. ]

"Security and convenience. They're usually a tradeoff. So it is for firewalls. It would be most convenient to have the firewall pass everything (in other words, no firewall at all). Trouble is, in all but the most benign environments, your box would quickly be owned. Ultra security would dictate the most selective possible firewall. The downside of such an ultra-selective firewall is that the slightest oversight would lead to a service not being accessible, or possibly being slow or intermittent, and the firewall wouldn't be the obvious root cause. So we balance the convenience we need with the security called for, and hopefully come up with a proper firewall.

"Modern Linux distributions use a program called IPTables for firewalling. Daunting at first, IPTables becomes logical with a little explanation and a little experience. That's where this issue of Linux Productivity Magazine comes in--it gives an explanation, and if you follow the articles, you get a little experience..."

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