Chapter two interception of information over lands
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Before we start to work we need to configure a network interface only a system administrator can make
these changes.
We set the receiving mode for the network interface to permit us.
Here is the first network card.
EF 0
after configuring the network interface will copy the software from the enclosed disk.
Next we will compile and install the software on the hard disk
the software compilation process can take a few minutes depending on the hardware configuration of the
computer.
We repeat this process for each of the required applications.
After preparing the environment we can begin to demonstrate the functions of the individual programs.
The first step is to check which computers in our local network are active at the moment.
For this we use the map scanner
Our aim will be to intercept the packet transmission to and from the computer at 1 9 2 1 6 8 1 2 4 5
to read the data we will use the TCAP dump program to intercept information in star topology networks.
We use the AARP packet falsification technique or arps proofing to achieve our goal.
We will use the AARP script that we created previously.
We will now copy it from the enclosed disk
before starting the attack.
We must enable the transfer of the packets that are not addressed for our computer
to do this.
We modify the system file slash proc slash Ciss slash net slash IPV for Slash I.P underscore forward
entering the value one into it.
At last we can run the AARP script we copied earlier which will redirect the network traffic to our
computer.
The first call paramita is the IP address of the network gateway.
The second is the IP address of the target
as we can see the TCAP dump program displays all intercepted packets on the screen.
Now let's try to intercept the traffic of a popular instant messaging program for this purpose we eavesdrop
on the packets going through Port 874
as we can see the operation has been successful in the next lesson we will discover the methods to intercept
encrypted information.