Marian Marinov/HackMan

For the past few days I’m implementing various attacks related to the TCP protocol.
I just finished a TCP connection flooder which can bring almost any service to complete stop with as little as 75Kbit/s and 12 packets per second.
This is for one service only. But if you combine this with a second service, for example [...]

Finally we got our Christmas tree. We had an argument with Toni about the tree. I wanted a normal natural tree and she wanted an artificial(plastic one). So I agreed with her, but the new tree has a bug. The top part of the tree doesn’t clip with the bottom, but since it was after [...]

I can’t understand one thing, almost 20 years ago Stevens wrote the books for Unix network programing, which I consider to be the Bibles of network programing. And there are still people that don’t understand why they should do a full implementation with all the checks required when they are writing network applications.
And the most [...]

The results from the first exam of Linux System Administration course are ready and are uploaded at http://training.iseca.org
What is interesting is that even with almost half of the questions not answered you can still get almost 20 point out of 50.
And one disappointing thing is that this year the girls have a slightly lower average [...]

While some people are changing the styles of their blogs to more clean and simple themes I decided that I will go with my favorite color and some nice picture
The main reason that made me change the looks of the blog is that many of the new posts are using the PRE tag and [...]

One of the problems when you are migrating a server is actually migrating the traffic from the old IPs to the new IPs.
Since we were doing that fairly often for some of our server I have used one very common trick, which was to use DNAT + SNAT to move the traffic from the old [...]

For me, this book was more like a manual then a true in depth learning. It is a very good and easy to read book. One of the best things was that while reading the book it was actually making me to read more and more. I actually finished it in less then three or [...]

Today I had to install MySQL Proxy on one of our servers.
What I found was that the current stable version 0.7.2 requires more resent version of Glib2 then what comes with CentOS 5.4.
So here is what I did in order to build it with a different version of glib2 then the default installation:
LUA: download & [...]

Един силно интелектуален разговор между мениджъри:
[hackman] Ще ви подаря моя снимка в цял ръст…
[hackman] Да си я сложите във вшата стая
[hackman] Само като я гледате и ще работите по-добре
а не може ли само гол от кръста на долу и в гръб
ще вдига мотивацията
и други неща
…
[hackman] много космясъл моя гъз… [...]

I started to use syscalls in Perl scripts a long time ago. One of the main issues I face every time I install a script on a new machine is creating Perl header files from the C headers.
It is supposed to be done very easy:

# cd /usr/include
# h2ph *.h
# h2ph */*.h

With this we should have [...]