Ethical Hacking - TCP/IP Hijacking

TCP/IP Hijacking is when an authorized user gains access to a genuine network connection of another user. It is done in order to bypass the password authentication which is normally the start of a session.
In theory, a TCP/IP connection is established as shown below −
TCP/IP
To hijack this connection, there are two possibilities −
Example
An attacker monitors the data transmission over a network and discovers the IP’s of two devices that participate in a connection.
When the hacker discovers the IP of one of the users, he can put down the connection of the other user by DoS attack and then resume communication by spoofing the IP of the disconnected user.
Quick Tip
All unencrypted sessions are vulnerable to TCP/IP session hijacking, so you should be using encrypted protocols as much as possible. Or, you should use double authentication techniques to keep the session secured.

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