I still see several wireless networks with weak or even no security enabled. However if somebody uploads illegally content, like copyrighted movies, you will be held responsible as holder of the internet connection.
As you may not know what kind of security your router has as it has been installed by somebody else or you can't change the configuration you can use a software stack on Ubuntu Linux to test security. Do NOT use this to crack a network you do not own!
This blog entry is based on this
article. I found that some information is outdated or instructions were missing so I wrote this new article.
I am using Ubuntu Linux 11.10 / 32 Bit on a Lenovo Thinkpad.
First you should install some requirements:
sudo apt-get install git gtk-sharp2 libncurses5-dev gettext mono-dmcs pyrit
Now install aircrack-ng
sudo apt-get install aircrack-ng
To install crunch-wordlist
open a terminal and cd to your home directory
tar xvfz crunch-3.1.tgz
Navigate to line 44 and modify it so it reads:
@echo "Building binary..."
$(CC) $(CFLAGS) $(LFS) $? -o $@ -lm
Now continue to make the binaries:
sudo make install
To get mdk3
open your terminal in your home directory:
tar xvf mdk3-v6.tar
Edit the second line so it reads:
LINKFLAGS = -pthread
Now continue on the terminal:
sudo make install
To install the nice WEPCRACKGUI
open another terminal in your home directory
git clone git://wepcrackgui.git.sourceforge.net/gitroot/wepcrackgui/wepcrackgui
You should now see a program start like this:
You may need to go to Options - Preferences to edit the location of crunch. By default it installs to /pentest/passwords/crunch.
For better results I had to go to Driver specific options and change from AireplayConservative to WpaSupplicant.
If you like to test if your password is too easy to guess because it is one of the most common passwords, read here and here