The first step and install a sniffer (ettercap).
And the latest version 0.7.3 and is available for Linux and Windows OS.
For distro based on debian / ubuntu simply type :
# sudo apt-get install ettercap-gtk
For other distributions, we need to download to compile the package.
#. / Configure
# make install
How to ?
First open Ettercap and run in root mode.
Sniffer > Unified Sniffing
Select the network card you want to select and then click "OK".
Hosts > Scan for Hosts
At the bottom of the screen as "Hosts List is a host that added" (Those listed below are computers that are online in the network).
Hosts > Host list
Now appear the IP of the computer that is connected, it must be remembered that the router is also emerging.
Select IP to attack your computer and click "Add to Target 1", then the router on the "Add to Target 2"
Before you start doing sniffer, let us remember and use a technique called man-in-the-Midler.
MITM > ARP Poisoning - Sekarang check list pada "Sniff remote connections" dan klik "OK"
Start > Start sniffing.
we have done sniffing.
View> Connections - Here we can see all the connections, double click to see the data they contain, including conversations, users and passwords, etc..
Sekarang tinggalkan biarkan Ettercap bekerja.3;)