Hacker, Researcher and Author.

How To Sniff VOIP Session Using Cain

According to wikipedia:

Voice over Internet Protocol (Voice over IP, VoIP) is one of a family of internet technologies, communication protocols, and transmission technologies for delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms frequently encountered and often used synonymously with VoIP are IP telephony, Internet telephony, voice over broadband (VoBB), broadband telephony, and broadband phone.

Cain is an excellent software which can be used for sniffing a VOIP, There are couple of methods to sniff a VOIP session but in this tutorial I will explain you how you can use a Man in the Middle Attack with Cain and Abel to sniff a VOIP conversation.

Sniff VOIP Session With Cain

So here is how you can capture a VOIP session on your network:

Step 1 - First of all download Cain  and install it.

Step 2 - Once cain is successfully installed go ahead and launch it, Now launch the sniffer by clicking on a small green button just below the file option

Step 3 - Next click on the blue "+" at the top, choose "All hosts in my subnet" and click ok

Step 4 - This will show you all the active hosts on your network.

Step 5 - Next goto ARP tab at the bottom and press the blue "+" sign, select the hosts on which you want to you want to perform a man in the middle attack and click ok

Step 6 - Now just click on the little yellow "Microtoxic" button at the top to launch the ARP Poisoning attack which is the real name for Man in the middle attack..

Step 7 -  Next click VOIP tab at the bottom and if cain has captured a VOIP session, you will get similar results.

I hope you have enjoyed reading the post, I will write also write an article on protecting your VOIP sessions in the upcoming posts.


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