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Learning Network Forensics by Samir Datt

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How does tunneling work?

The process of encapsulating a packet within another packet and then sending it over the network is known as tunneling.

As we are aware, every packet has a header that contains details relating to the IP version, length of the IP header, size of the IP datagram, source address, destination address, flags, and a host of other data. The header length is usually 20 bytes. The remainder portion of the packet is the data. Tunneling involves hiding unsupported or unauthorized packets within the data portion of the IP datagram. In such cases, the available space is less than what it is usually and at times, this can cause a problem in the transmitted data.

Data tunneling is often used to hide the origin of the traffic across the ...

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