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RFC-editor.org - This is an excellent site for finding RFC documents in a fast and orderly way. Functions for searching RFC documents, and general information about the RFC community (I.e., errata, news, et cetera).

Internet Engineering Task Force - This is one of the biggest groups when it comes to setting and maintaining Internet standards. They are the ones maintaining the RFC repository, and consist of a large group of companies and individuals that work together to ensure the interoperability of the Internet.

Linux Advanced Routing and Traffic Control HOW-TO - This site hosts the Linux Advanced Routing and Traffic Control HOWTO. It is one of the biggest and best documents regarding Linux advanced routing. Maintained by Bert Hubert.

Paksecured Linux Kernel patches - A site containing all of the kernel patches written by Matthew G. Marsh. Among others, the FTOS patch is available here.

ULOGD project page - The homepage of the ULOGD site.

• The Linux Documentation Project is a great site for documentation. Most big documents for Linux is available here, and if not in the TLDP, you will have to search the net very carefully. If there is anything you want to know more about, check this site out.

Snort - this is an excellent open source "network intrusion detection system" (NIDS) which looks for signatures in the packets that it sees, and if it sees a signature of some kind of attack or break-in it can do different actions that can be defined (notifying the administrator, or take action, or simply logging it).

Tripwire - tripwire is an excellent security tool which can be used to find out about host intrusions. It makes checksums of all the files specified in a configuration file, and then it tells the administrator about any files that has been tampered with in an illegit way every time it is run.

Squid - This is one of the most known webproxies available on the market. It is open source, and free. It can do several of the filtering tasks that should be done before the traffic actually hits your webserver, as well as doing the standard webcaching functions for your networks.

http://kalamazoolinux.org/presentations/20010417/conntrack.html - This presentation contains an excellent explanation of the conntrack modules and their work in Netfilter. If you are interested in more documentation on conntrack, this is a "must read".

http://www.docum.org - Excellent information about the CBQ, tc and the ip commands in Linux. One of the few sites that has any information at all about these programs. Maintained by Stef Coene.

http://lists.samba.org/m ailman/listinfo/netfilter- The official Netfilter mailing-list. Extremely useful in case you have questions about something not covered in this document or any of the other links here.

And of course the iptables source, documentation and individuals who helped me.

Appendix F. Acknowledgments

I would like to thank the following people for their help on this document:

Fabrice Marie, For major updates to my horrible grammar and spelling. Also a huge thanks for updating the tutorial to DocBook format with make files etc.

Marc Boucher, For helping me out on some aspects on using the state matching code.

Frode E. Nyboe, For greatly improving the rc.firewall rules and giving great inspiration while i was to rewrite the rule-set and being the one who introduced the multiple table traversing into the same file.

Chapman Brad, Alexander W. Janssen, Both for making me realize I was thinking wrong about how packets traverse the basic NAT and filters tables and in which order they show up.

Michiel Brandenburg, Myles Uyema, For helping me out with some of the state matching code and getting it to work.

Kent `Artech' Stahre, For helping me out with the graphics. I know I suck at graphics, and you're better than most I know who do graphics;). Also thanks for checking the tutorial for errors etc.

Anders 'DeZENT' Johansson, For hinting me about strange ISPs and so on that uses reserved networks on the Internet, or at least on the Internet for you.

Jeremy `Spliffy' Smith, For giving me hints at stuff that might screw up for people and for trying it out and checking for errors in what I've written.

And of course everyone else I talked to and asked for comments on this file, sorry for not mentioning everyone.

Appendix G. History

Version 1.2.2 (19 Nov 2006)

http://iptables-tutorial.frozentux.net

By Oskar Andreasson

Contributors: Jens Larsson and G. W. Haywood.

Version 1.2.1 (29 Sep 2006)

http://iptables-tutorial.frozentux.net

By: Oskar Andreasson

Contributors: Ortwin Glueck, Mao, Marcos Roberto Greiner, Christian Font,

Tatiana, Andrius, Alexey Dushechkin, Tatsuya Nonogaki and Fred.

Version 1.2.0 (20 July 2005)

http://iptables-tutorial.frozentux.net

By: Oskar Andreasson

Contributors: Corey Becker, Neil Perrins, Watz and Spanish translation team.

Version 1.1.19 (21 May 2003)

http://iptables-tutorial.frozentux.net

By: Oskar Andreasson

Contributors: Peter van Kampen, Xavier Bartol, Jon Anderson, Thorsten Bremer

and Spanish Translation Team.

Version 1.1.18 (24 Apr 2003)

http://iptables-tutorial.frozentux.net

By: Oskar Andreasson

Contributors: Stuart Clark, Robert P. J. Day, Mark Orenstein and Edmond Shwayri.

Version 1.1.17 (6 Apr 2003)

http://iptables-tutorial.frozentux.net

By: Oskar Andreasson

Contributors: Geraldo Amaral Filho, Ondrej Suchy, Dino Conti, Robert P. J. Day,

Velev Dimo, Spencer Rouser, Daveonos, Amanda Hickman, Olle Jonsson and

Bengt Aspvall.

Version 1.1.16 (16 Dec 2002)

http://iptables-tutorial.frozentux.net

By: Oskar Andreasson

Contributors: Clemens Schwaighower, Uwe Dippel and Dave Wreski.

Version 1.1.15 (13 Nov 2002)

http://iptables-tutorial.frozentux.net

By: Oskar Andreasson

Contributors: Mark Sonarte, A. Lester Buck, Robert P. J. Day, Togan Muftuoglu,

Antony Stone, Matthew F. Barnes and Otto Matejka.

Version 1.1.14 (14 Oct 2002)

http://iptables-tutorial.frozentux.net

By: Oskar Andreasson

Contributors: Carol Anne, Manuel Minzoni, Yves Soun, Miernik, Uwe Dippel,

Dave Klipec and Eddy L O Jansson.