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Configuring IPCop Firewalls by James Eaton-Lee, Barrie Dempster

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Knowing what firewalls are intended to do and why their function is important to us, it is now necessary to explore, briefly, how it is that firewalls accomplish the broad purpose we've assigned for them.

Personal Firewalls

Personal firewalls have become increasingly common in the last five years. With the inclusion of personal firewalling technology in Windows XP Service Pack 2 (and augmented technology in the upcoming Windows Vista), as well as firewalling stacks in the OSX and Linux operating systems, it is now a fairly normal occurrence for workstations and desktops to be running firewalling software.

Generally, this comes in one of two forms—either firewalling software built into the operating system (as in the case of OSX, ...

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