Yes, they are using DPI. Check out this page from leading DPI vendor Procera Networks[1]: "The core component in PacketLogic is Procera’s own identification en

Yes, they are using DPI. Check out this page from leading DPI vendor Procera Networks[1]: "The core component in PacketLogic is Procera’s own identification engine DRDL – Datastream Recognition Definition Language. DRDL facilitates a broad range of criteria to properly identify the application of each individual datastream, a.k.a. flow, session or connection. The identification relies on bidirectional information like the packet sequence in a handshake, header information, protocol, actual payload, and other distinguishing characteristics of an application. This way DRDL can properly identify even encrypted applications." [1]http://www.proceranetworks.com/drdl-technology.html http://www.proceranetworks.com/drdl-technology.html