What is nDPI ?
nDPI® is an open source LGPLv3 library for deep-packet inspection. Based on OpenDPI it includes ntop extensions. We have tried to push them into the OpenDPI source tree but nobody answered emails so we have decided to create our own source tree
How To Compile nDPI
In order to compile this project do
To compile the library w/o any tools or tests:
- ./autogen.sh --with-only-libndpi
To run tests do additionally:
- ./tests/do.sh # Generate and check for diff's in PCAP files
- ./tests/do-unit.sh # Run unit tests
- ./tests/do-dga.sh # Run DGA detection test
or run all with:
Please note that the (minimal) pre-requisites for compilation include:
- GNU tools (autoconf automake libtool pkg-config gettext flex bison)
- GNU C compiler (gcc) or Clang
On Debian/Ubuntu systems do:
- sudo apt-get install build-essential git gettext flex bison libtool autoconf automake pkg-config libpcap-dev libjson-c-dev libnuma-dev libpcre2-dev libmaxminddb-dev librrd-dev
On Arch Linux:
- sudo pacman -S gcc git gettext flex bison libtool autoconf automake pkg-config libpcap json-c numactl pcre2 libmaxminddb rrdtool
- sudo pkg install gcc git gettext flex bison libtool autoconf automake devel/pkgconf gmake libpcap json-c pcre2 libmaxminddb rrdtool
Remember to use
gmake and not
make on FreeBSD
- brew install coreutils gcc git gettext flex bison libtool autoconf automake pkg-config libpcap json-c pcre2 libmaxminddb rrdtool
There are three supported ways to build nDPI:
- MSYS2 (assuming MSYS2 already installed):
- msys2 -c "pacman --noconfirm -S --needed --overwrite '*' git mingw-w64-x86_64-toolchain automake1.16 automake-wrapper autoconf libtool make mingw-w64-x86_64-json-c mingw-w64-x86_64-crt-git mingw-w64-x86_64-pcre mingw-w64-x86_64-libpcap"
Visual Studio (see
Note: All Windows versions require npcap with WinPcap compatibility mode enabled.
How To Build The Documentation
- pip install --upgrade pip
- pip install -r doc/requirements.txt
- make doc
Use the builtin python3 webserver to view documentation:
- make doc-view
How To Add A New Protocol Dissector
The entire procedure of adding new protocols in detail:
- Add new protocol together with its unique ID to:
- Create a new protocol in:
- Variables to be kept for the duration of the entire flow (as state variables) need to be placed in:
ndpi_flow_tcp_struct(for TCP only),
ndpi_flow_udp_struct(for UDP only), or
- Add a new entry for the search function for the new protocol in:
- Choose (do not change anything) a selection bitmask from:
- Set protocol default ports in
- Be sure to have nBPF support, cloning
PF_RINGin the same directory where you cloned
git clone https://github.com/ntop/PF_RING/ && cd PF_RING/userland/nbpf && ./configure && make
- From the
./autogen.sh --with-pcre(nBPF and PCRE are usually optional, but they are needed to run/update all the unit tests)
How to use nDPI to Block Selected Traffic
You can use nDPI to selectively block selected Internet traffic by embedding it onto an application (remember that nDPI is just a library). Both ntopng and nProbe cento can do this.
nDPI Paper Citation
- Deri, Luca, et al. nDPI: Open-source high-speed deep packet inspection 2014 International Wireless Communications and Mobile Computing Conference (IWCMC). IEEE, 2014.
Videos and Presentations
- Using nDPI for Monitoring and Security
- Network Traffic Classification for Cybersecurity and Monitoring
While we do our best to detect network protocols, we cannot guarantee that our software is error free and 100% accurate in protocol detection. Please make sure that you respect the privacy of users and you have proper authorization to listen, capture and inspect network traffic.
nDPI is a registered trademark in the US and EU.