Your Guide to understand DPI (Deep Packet Inspection)

DPI (Deep Packet Inspection) is a technology that helps network owners to comprehend in real time the quality of the packet that is sent. This requires the address of origin and destination, along with other related information to transfer the packet through the network.

The implementation of DPI has improved the procedure dramatically. The content submitted by the user will reach the web server immediately sooner, with the content in place via DPI, the content first goes to the gateway computer, decrypted and then scanned, then encrypted and sent by the gateway system to the web server. Essentially, correctly screened for content.

Levels of tests on packets

Based on the degree of packet analysis, functions offered by DPI technologies were previously available to a small extent and are categorised into three types:’ shallow’,’ medium’ and ‘broad’ packet inspection.

  • Shallow Packet Inspection tests the pocket header containing the IP addresses of the sender and receiver, and SPI is unable to read the packet layers of the session, layout, or operation. To survey the packet ‘s contents, it is unable to see through the packet ‘s payload.
  • Medium Packet Inspection (MPI) is a system that is located between ISP / Internet gateways and end-user machines. That checks the details of the packet header against its list when a packet reaches the proxy and is evaluated against a parse-list that can be quickly modified by server administrators. MPI devices lack scalability, which limits their ISP efficiency.
  • Technologies for Deep Packet Inspection (DPI) are intended to allow network operators to determine the origin and quality of each data packet that passes through networking hubs. From a particular IP address, DPI devices will peer at all the content. Choose traffic from HTTP (Not secure) and catch traffic flowing to and from a particular mail server. For all transactions, DPI devices are able to decide the programme created by the packet in real time.

The benefits of using cryptography to keep your private data protected from listening eyes is the SSL certificate. However, because encrypted traffic can be used to move past the usual defences, there are risks involved with its use.

For eg, during an e-commerce session, you could download a file containing a virus or you could receive a phishing email containing an ostensibly harmless downloader file that generates an encrypted session between client and server when initiated and instals malware into your device. Since the sessions are encrypted in these assaults, they could get through the security measures of your network. Finally , it is important to instal the SSL certificate on the website to allow SSL inspection that will prevent hacking, phishing, malware attacks, etc. Here is an article that discusses more on how the attack was carried out on the PayPal website.


DPI offers network intelligence, which also enables the quality of the packet going through the network to be tracked. Enabling the I S Ps to track, speed up or slow down, block or philtre the data using DPI.