: Why did you decide to write the iptables reference? Oskar Andreasson: When I started using Linux I noticed a huge black hole in the. More information about Oskar Andreasson and his/her books listed in FreeTechBooks. Iptables Tutorial – Linux Firewall Configuration. Post date: 22 Aug. Oskar Andreasson [email protected] by Oskar Andreasson. Copyright © .. 1. txt.

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However, I don’t plan to get this project really moving until the iptables tutorial has stabilized, in perhaps months. It was available in bookform from Lulu. I believe that this course may actually hold a lot of interest even for the Linux zealots out there itpables may not have a lot of experience with the console of Linux.

Sorry, your blog cannot share posts by email. What I hope that this tutorial do, is that it gives people new knowledge about the Linux firewalling possibilities, how they work, and a general knowledge of how to set it up properly.

Yes, I think there is. I most definitely think so. Please login or register. This would more os,ar less be a way for me to get some money from the project, and a way for those who has read and liked it to actually contribute to what I have written and to show that they support me.

Oskar Andreasson speaks with LinuxSecurity. If there is any Swedish speaking people, I suggest them to check out http: I would suggest at least installing a NIDS i. There is actually something people could do to contribute to this tutorial.

What is the most important Linux security technology?


One example would be iptables in the beginning, by today there is a wast amount of documentation and different introductions etceteras. Red Hat and Debian may be easier to maintain in this sense, as they contain more or less integrated package updating and package lists. What are some of the major pitfalls Linux Administrators fall into? I still think the tutorial is aimed at those, but it contains more information today about the advanced functions of netfilter and iptables so it andeasson be fairly well suited for the advanced users as well who might find some interesting reads in the tutorial.


If not, well, it would be sad if not even persons liked it enough to andreasxon buy it. Do you believe the open source nature of Linux provides a superior iptablfs to making security vulnerabilities easier to spot and fix?

After this I need to go through the explanation of the rc. Designed to be Secure Without Fail. Some good examples of what this document will contain is explanations on how the ip command works and the syntax, how all the different options and flags to the command is used and information on how each “subcommand” works. One of the long-term goals of this project andreawson actually to print a book of the whole tutorial and sell to the readers who liked the tutorial.

For more information on this, visit the netfilter mailinglist page. The iptables-tutorial is currently rather stable, and contains information on all the currently available matches and targets in kernelas well as a couple of complete example scripts and explanations. Nadreasson you have fixed the most common vulnerability and someone is determined to get into your host, then you can abdreasson certain that the attacker will leave the second most common vulnerability out, or the third for that matter.

How can your iptables reference help to avoid these problems? Then there was problems with the size of the cover generated in their own webtoolsetc. Both Lists Newsletter Security Advisories. This is about the same size as the iptables tutorial, but is elementary and guides a total new user to Linux through their first experience. What do you feel is the most common Linux system vulnerability? I have also started another project on my spare time, to document the iproute2 package and its uses.

For example, I had a conversion error between different types of points leading to my pages being 0. Slackware can be a bit hard to do this with, since it has no package system of its own except iptbles old. This would not change the fact that the tutorial will be available on the Internet, it iptavles always be.

In open source, you can have the problem fixed within 3 minutes by yourself and have a bug report andreassson away and how to fix it, in closed source, you find a bug, send a bug report and then iptavles down and wait for weeks before anything happens. Why did you decide to write the iptables reference? Any kind of computer would suffice, even Pentiums at the moment, as long as I can have a few network cards with them 9 or so, but less would suffice too.


Who are your target audience and why? One of the main problems of Linux today is in my way of seeing things, that there is a huge lack of documentation, especially when you start digging into the deeper oskag of Linux. Are there other documents you have written that you think might andrasson beneficial to the Linux and open source security communities?

Then there is a request by some people that want to know how to make a transparent http proxy with iptables and squid.

Oskar Andreasson

My answer andreason the first question would, hence, be that they itpables do errors due to a andreasaon of documentation. If so, I think it’s worth printing a series. However, the percentage of users doing the latter is a dwindling small amount of people, I think. For Red Hat, do the same thing select the installed packages. Brazilian bank Inter pays fine over customer data leak. After this, it is all a matter of keeping those few packages you have installed up to date.

Python and Bash – Contenders for the most used scripting language. During the time, I was also doing a lot of “work” for our site www. At the top of that, if you’re really security conscious, I’d suggest using kernel security patches and such. Their way of handling this was to allow the book to be published, and then every once in a while when someone ordered a book and paid for itthey all of a sudden andreasdon the publication, sent me a note that they did so not explaining whyand so forth.