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Tom’s Guide
Tom’s Guide
Technology
Sam Dawson

What is deep packet inspection?

Repeating pattern of magnifying glasses on a turquoise background.

The best VPNs protect your online activity by encrypting your internet connection, making it harder for external parties to track or control your data. However, some internet providers and organizations use a technology called deep packet inspection (DPI) to examine the data traveling across their networks. 

This technique gives a network operator massive amounts of information about the traffic that travels across their network, which allows them to easily identify intrusions, malware, and distributed denial of service (DDoS) attacks. However, DPI can also be used to detect and block VPN traffic. In this guide, I’ll walk you through what deep packet inspection is, how it works, and what you can do to keep your VPN working even when DPI systems are trying to close your connection.

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