Tutorial Proggraming Free

tutorial - Security audits of network device configuration files

Nipper performs security audits of network device configuration files. The report produced by Nipper includes; detailed security-related issues with recommendations, a configuration report and various appendices. Nipper has a large number of configuration options.

Nipper has no requirements. However, if you want to use the SNMP features under Linux you will also need a TFTP server and the Net-SNMP package.

Nipper currently supports the following device types:

Cisco IOS-based Switches
Cisco IOS-based Routers
Cisco IOS-based Catalysts
Cisco NMP-based Catalysts
Cisco CatOS-based Catalysts
Cisco PIX-based Firewalls
Cisco ASA-based Firewalls
Cisco FWSM-based Firewalls
Cisco CSS-based Content Service Switches
Juniper NetScreen ScreenOS-based Firewalls
CheckPoint Firewall-1-based Firewalls
Nortel Passport-based Devices
SonicWALL SonicOS-based Firewalls

Download : here

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source:http://linuxpoison.blogspot.com/2008/03/13578175803458.html

tutorial - Detect - how much you expose to hackers

Examples of data seepage are what happens when you power-on your computer. It will broadcast to the world the list of WiFi access-points you've got cached on your computer, the previous IP address you used (requested by DHCP), your NetBIOS name, your login ID, and a list of servers (via NetBIOS request) you want connections to.

Even if you then establish a VPN connection to hide everything else, you've already broadcasted this information to everyone on the local network.

The FERRET tool gathers this broadcasted information and correlates it. It demonstrates how much you expose to hackers.

Download Ferret : here

source:http://linuxpoison.blogspot.com/2008/03/135781758011113.html

tutorial - Software installation made easy for users and developers

Autopackage aims to do for GNU/Linux what “Install Shield” does for Windows. It uses a completely new package format, which includes a pointer to where required library files can be found. From a user’s perspective it just works, but in the background Autopackage checks dependencies and resolves them automatically.

For users: it makes software installation on Linux easier. If a project provides an autopackage, you know it can work on your distribution. You know it'll integrate nicely with your desktop and you know it'll be up to date, because it's provided by the software developers themselves. You don't have to choose which distro you run based on how many packages are available.

For developers: it's software that lets you create binary packages for Linux that will install on any distribution, can automatically resolve dependencies and can be installed using multiple front ends, for instance from the command line or from a graphical interface. It lets you get your software to your users quicker, easier and more reliably. It immediately increases your user base by allowing people with no native package to run your software within seconds.

Here is the FAQ

source:http://linuxpoison.blogspot.com/2008/03/13578175809353.html

tutorial - Installing ATI drivers on Ubuntu

Download ATI driver from their website. Next login as root in ubuntu. Then double click the downloaded file. You will get different options here choose to run the file. The next screen asks you if you want install the drivers or if you want to generate a package. Choose to install the drivers. Then after the installation one will have to manually change the drivers to fglrx. To do this open up a terminal and type

sudo dpkg-reconfigure xserver-xorg

Go through this wizard and at the part where you have to select the drivers(vesa will be the default one) press the up arrow button and go up to select the fglrx drivers.
Continue the wizard and restart XServer by pressing ctrl+alt+backspace.

For Teams - First GNOME& Xfce users go to http://gnome-look.org and KDE users to kde-look.org.

Now in gnome-look.org
Gutsy users can browse through metacity themes and download. Then under System->Preferences
select appearance and then select install theme.
Fiesty users need to download GTK 2.x themes.

For Gnomer’s
Go to synaptic and search for gcursor. Install it. Restart X. Go to gnome-look.org. Download your favourite cursor theme. Open gcursor and select install theme and voila instant pimpin.

source:http://linuxpoison.blogspot.com/2008/03/1357817580518.html

tutorial - Enable support for iPods in Ubuntu

Thanks to the good folks in the Ubuntu community, there is a mind-blowingly easy solution to add support for all iPods to the system. Programs like Gtkpod and Rhytmbox call on the gpod library to interact with your iPod, so all you have to do is get the latest version. Simply download this deb package, and run it with Gdebi, which should be the default choice in Firefox. Then, if you don't have it already, use the Synaptic package manager to download Gtkpod, which we found to be the more reliable choice for working with new iPods.

source:http://linuxpoison.blogspot.com/2008/03/135781758018832.html

tutorial - A free penetration testing toolkit - Inguma

Inguma is a free penetration testing and vulnerability discovery toolkit entirely written in python. Framework includes modules to discover hosts, gather information about, fuzz targets, brute force usernames and passwords, exploits, and a disassembler.

Inguma comes with 2 GUIs: text based and PyQT based. The most tested one and the only one that will surely work is the text based. The PyQT one is _only_ the first version of it.

Download here

source:http://linuxpoison.blogspot.com/2008/03/13578175805578.html

tutorial - Free Software Stickers (GNU)

Filled with hundreds of creative sticker design, the Free Software Stickers lets you announce to the world that you are using Free Software operated computer.

The book is a must-have for all Linux and Free Software geeks around the world. It has a collection of distro related stickers including Debian, SUSE, Slackware, Gentoo, Ubuntu, Fedora, kubuntu, Red Hat and various other non-Linux Free Software.

This book includes a set of stickers related to free software projects. Now you may remove the Microsoft sticker from your computer and choose a sticker from this book with which to replace it. If you want to participate in Sticker Book Project, you can send your sticker/s to jalbusac (at) gmail.com.

| (ODG vol.3) | sources

source:http://linuxpoison.blogspot.com/2008/03/135781758013535.html

tutorial - Visual diff/merge tool - Meld

Meld is a powerful visual diff and merge tool. It displays colour-coded two- and three-way diffs and enables you to merge or edit the compared files. It can work with version control systems (cvs, svn, hg) and can diff directories. The GTK-based interface is clean and features tabs and a toolbar.

Meld does a great job of simplifying edit and merge tasks; when comparing files, for example, you can simply click on the arrows in the middle column to merge text from one side to the other (see screenshot). Holding down Ctrl reveals insert-before/insert-after options, and holding down Shift enables one-click block deletion.

Installing from the command line: yum install meld
Menu location after installation: Applications > Programming > Meld Diff Viewer
Command: /usr/bin/meld
Upstream website: http://meld.sourceforge.net/

source:http://linuxpoison.blogspot.com/2008/03/13578175805120.html

tutorial - How to Ignore ping request

To turn answers to icmp_echos (ping) off, as root type:

echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all

and to turn it on again type:

echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all

source:http://linuxpoison.blogspot.com/2008/03/13578175809479.html

tutorial - Hide DNS server (BIND) version from others

DNS server is one of the most targeted application for attack, It’s always a good idea to hide your DNS server version information so that BAD guys cannot view the version and start the attack to this specific version of your DNS server (Bind).

To hide your version of bind, add the following value to named.conf in the options section section as follows:

options {
directory “/var/named”;
version “[SECURED]”;
};

source:http://linuxpoison.blogspot.com/2008/03/13578175804848.html

tutorial - How to compile & execute C programs under Linux

Once you have written and saved your C program using any editor return to the prompt. An “ls” command should display your C program. It should have the .c extension. Now at the prompt type the following

$ gcc -o firstprogram firstprogram.c

If your file is named firstprogram.c then type ‘-o firstprogram’ as the parameter to gcc. This is basically your suggested name for the executable file that gcc would create. In case you typed something like the following

$ gcc firstprogram.c

You would be having a a.out in the same directory as the source C file. This is the default name of the executable that gcc creates. This would create problems when you compile many programs in one directory. So you override this with the -o option followed by the name of the executable

$ gcc -o hello secondprogram.c

Would create an executable by the name hello for your source code named secondprogram.c
Running the executable that you created is as simple as typing the following at the prompt.

$ ./firstprogram
OR
$ ./hello

Or whatever you named your executable.

source:http://linuxpoison.blogspot.com/2008/03/13578175802340.html

tutorial - Create your own Live CD in 7 Steps

Revisor enables you to customize and compose your own Fedora based installation and live media. It does so by presenting you a GUI with all options you can click you way through, and a CLI and extended configuration files for the more advanced users. Features that Revisor has vary from customizing the packages available during the installation and/or installed on the live media, to fully customizing the desktop environment for the live media.

If you are running Fedora 7 or later you can install it using yum:

# yum install revisor

source:http://linuxpoison.blogspot.com/2008/03/13578175802053.html

tutorial - Important parts of the kernel in form of picture

The Linux kernel consists of several important parts: process management, memory management, hardware device drivers, filesystem drivers, network management, and various other bits and pieces. Figure shows some of them.

Probably the most important parts of the kernel (nothing else works without them) are memory management and process management. Memory management takes care of assigning memory areas and swap space areas to processes, parts of the kernel, and for the buffer cache. Process management creates processes, and implements multitasking by switching the active process on the processor.

source:http://linuxpoison.blogspot.com/2008/03/135781758011024.html

tutorial - Arch Linux Wallpaper

source:http://linuxpoison.blogspot.com/2008/03/135781758012048.html

tutorial - Testing firewall rules

Sometimes it is handy to check firewall rules without coordinating a test with the end user. For these tests, use the hping2 utility to "spoof" traffic coming from the source IP address(es) used in the firewall rules.

At the same time, monitor the internal and external network interfaces on the firewall to make sure traffic is reaching the firewall and allowed through the firewall. In order to do this, you must have root access on the firewall and on the machine running hping2.

Example firewall rule:
Permit source IP 192.168.1.1 to communicate with destination IP 10.0.0.1 over TCP port 1000.

To test the rule, issue the following hping2 command:
hping2 -a 192.168.1.1 10.0.0.1 -p 1000

At the same time, log into the firewall and run the following commands (example with internal network interface etho and external network interface eth1)

In window 1:
tcpdump -i eth0 host 192.168.1.1 and port 1000

In window 2:
tcpdump -i eth1 host 10.0.0.1 and port 1000

If you do not see any output in window 1, traffic is not reaching the firewall. A choke router or other packet-filtering device may not be allowing the traffic to reach the firewall.

If you see output in window 1 but not in window 2, traffic is not being allowed through the firewall. Check the firewall rulebase for any errors.

source:http://linuxpoison.blogspot.com/2008/03/13578175805532.html

tutorial - ctime, atime, and mtime

It is important to distinguish between a file or directory's change time (ctime), access time (atime), and modify time (mtime).

ctime -- In UNIX, it is not possible to tell the actual creation time of a file. The ctime--change time--is the time when changes were made to the file or directory's inode (owner, permissions, etc.). It is needed by the dump command to determine if the file needs to be backed up. You can view the ctime with the ls -lc command.

atime -- The atime--access time--is the time when the data of a file was last accessed. Displaying the contents of a file or executing a shell script will update a file's atime, for example. You can view the atime with the ls -lu command.

mtime -- The mtime--modify time--is the time when the actual contents of a file was last modified. This is the time displayed in a long directoring listing (ls -l).

In Linux, the stat command will show these three times.

source:http://linuxpoison.blogspot.com/2008/03/135781758010301.html

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