Install Ettercap

Here I'll show you how to install ettercap, a program to manage the connections on your network.

First of all, we must install:
sudo apt-get install build-essential 
sudo apt-get install linux-headers-`uname -r`
sudo apt-get install libpcre3-dev 
sudo apt-get install libpcap0.8-dev 
sudo apt-get install libnet1-dev 
sudo apt-get install openssl
sudo apt-get install libssl-dev 
sudo apt-get install ncurses-bin 
sudo apt-get install libncurses5-dev 
sudo apt-get install libnet6-1.3-dev 
sudo apt-get install libpthread-stubs0-dev 
sudo apt-get install zlib1g-dev 
sudo apt-get install libltdl-dev 
sudo apt-get install pango-graphite
sudo apt-get install pkg-config 
sudo apt-get install libpango1.0-dev 
sudo apt-get install libatk1.0-dev 
sudo apt-get install libgtk2.0-dev 
sudo apt-get install autoconf
sudo apt-get install byacc


**: If you can't install one of them, look for it in ppa manager. How to get y-ppa-manager.
And finally:


sudo apt-get install ettercap-gtk ettercap-common


When you have installed it, type on the terminal:
sudo gedit /etc/etter.conf


And we look for something like "iptables" and delete the #.

It will be like:


redir_command_on = "iptables -t nat -A PREROUTING -i %iface -p tcp --dport %port -j REDIRECT --to-port %rport"

And now open the program:

sudo ettercap -C   (text-mode)
sudo ettercap --gtk (graphic-mode)