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The Firewalls FAQ is currently undergoing revision. The maintainers
welcome input and comments on the contents of this FAQ. Comments related to the FAQ should be addressed to
firewalls-faq@interhack.net.
Before you send us mail, please be sure to see sections
1.2 and 1.3 to make sure this is
the right document for you to be reading.
Firewalls have come a long way from the days when this FAQ started.
They've gone from being highly customized systems administered by their implementors to a mainstream commodity. Firewalls are no longer
solely in the hands of those who design and implement security systems; even security-conscious end-users have them at home.
We wrote this FAQ for computer systems developers and administrators.
We have tried to be fairly inclusive, making room for the newcomers,
but we still assume some basic technical background. If you find that
you don't understand this document, but think that you need to know
more about firewalls, it might well be that you actually need to get
more background in computer networking first. We provide references
that have helped us; perhaps they'll also help you.
Note that this collection of frequently-asked questions is a result of
interacting with many people of different backgrounds in a wide
variety of public fora. The firewalls-faq address is not a help desk.
If you're trying to use an application that says that it's not working
because of a firewall and you think that you need to remove your
firewall, please do not send us mail asking how.
If you want to know how to ``get rid of your firewall'' because you
cannot use some application, do not send us mail asking for help. We
cannot help you. Really.
Who can help you? Good question. That will depend on what exactly
the problem is, but here are several pointers. If none of these
works, please don't ask us for any more. We don't know.
- The provider of the software you're using.
- The provider of the network service you're using. That is, if
you're on AOL, ask them. If you're trying to use something on a
corporate network, talk to your system administrator.
The FAQ can be found on the Web at
It's also posted monthly to
Posted versions are archived in all the usual places. Unfortunately,
the version posted to Usenet and archived from that version lack the
pretty pictures and useful hyperlinks found in the web version.
Several translations are available. (If you've done a translation and
it's not listed here, please write us so we can update the master
document.)
- Norwegian
- Translation by Jon Haugsand
http://helmersol.nr.no/haandbok/doc/brannmur/brannmur-faq.html
Many people have written helpful suggestions and thoughtful
commentary. We're grateful to all contributors. We'd like to thank a
few by name: Keinanen Vesa, Allen Leibowitz, Brent Chapman, Brian Boyle, D. Clyde Williamson, Paul D. Robertson, Richard Reiner, Humberto Ortiz Zuazaga, and Theodore Hope.
Copyright ©1995-1996, 1998 Marcus J. Ranum.
Copyright ©1998-2000 Matt Curtin. All rights
reserved. This document may be used, reprinted, and redistributed
as is providing this copyright notice and all attributions
remain intact. Translations of the complete text from the original
English to other languages are also explicitly allowed. Translators
may add their names to the ``Contributors'' section.
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