User's Guide available at www.ntop.org/guides/nDPI/

DPI is a time-consuming activity as protocols (in particular P2P/games/IOT/...) change quite often. This means that it’s necessary to update the code from time to time and add extensions. We would encourage anyone out there to help us adding or enhancing new protocols: we will put your contributions on our GitHub repository and make them available to everyone free of charge. In fact the main reason why we decided to go for nDPI instead of using the original library, is that the company behind OpenDPI has never replied to our offers to merge the extensions we coded onto the original source code.