6.0 Stable

nDPI 6.0 (Aug 2026)

Major Changes

• Update nDPI Licensing Terms and Component Usage: for-profit vs not-for-profit applications. See: https://www.ntop.org/announcing-ndpi-dual-license-change/
• Add detection of Slow Dos, SlowDoS 3WH and Slowloris attacks. See: https://www.ntop.org/slow-dos-detection-and-prevention/
• More flexible and useful (nDPI-) fingerprints. See: https://www.ntop.org/is-ja4-now-obsolete/
• Add USDT static tracing probes for zero-overhead runtime observability. See: https://www.ntop.org/observing-ndpi-from-the-inside-introducing-usdt-tracepoints/
• Add ability to define protocol dissectors in shared libraries and load them at runtime

New Supported Protocols and Services

Further information are available at https://github.com/ntop/nDPI/blob/dev/doc/protocols.rst

• Add Meshtstic
• Add (generic) JSON
• Add (generic) MsgPack
• Add sub-classification for some GitHub services: Copilot, Packages, Actions
• Add Youtube Kids
• Add SBE
• Add Iris
• Add libp2p
• Add NetMotion
• Add sub-classification for some Proton services: generic Proton, Mail, Pass, Drive, Calendar, Docs, Wallet, Lumo, Meet
• Add YGGDRASIL
• Add Nebula
• Add identification of Discord audio/video calls
• Removed Zattoo
• Add Free Fire
• Add content-control categories: Search Engine, Children, Violence, Drugs, Weapons

New algorithms

• Add ndpi_data_burstiness() for computing data burstiness
• Add new API calls for implementing anomaly detection in 5ce0a0c

New configuration knobs

Further information are available at https://github.com/ntop/nDPI/blob/dev/doc/configuration_parameters.md

• Removed flow.direction_detection
• metadata.ndpi_server_fingerprint: Enable/disable computation and export of nDPI server fingerprint
• metadata.ndpi_fingerprint: Enable/disable computation and export of nDPI fingerprint
• metadata.ndpi_fingerprint_format: Format of the nDPI fingerprint ((i.e. metadata.ndpi_fingerprint)). 0 = client only, 1 = client and server
• metadata.ndpi_fingerprint_ignore_tcp_fp: Configure if TCP fingerprint is used or not for nDPI fingerprint (i.e. for metadata.ndpi_fingerprint) calculation
• ssdp,metadata: Enable/disable extraction of ALL metadata for SSDP flows. Note that, unlike others protocols, for SSDP flows you can't enable/disable a specific metadata
• ntp,metadata: Enable/disable extraction of ALL metadata for NTP flows. Note that, unlike others protocols, for NTP flows you can't enable/disable a specific metadata
• dns,max_packets_extra_dissection: After a flow has been classified has DNS, nDPI might analyse more packets to look for a sub-classification or for metadata. This parameter set the upper limit on the number of these packets. Useful if interested in handling big DNS messages (i.e. AXFR transfers)
• tls,max_num_blocks_to_analyze: Set the maximum number of TLS block to process; if 0, TLS blocks are not analyze
• tls,tls_blocks_show_timing: Enable/disable usage of timing information in TLS block processing
• ssh,metadata.hassh_fingerprint: Enable/disable computation and export of HASHH fingerprint for SSH flows
• ssh,metadata.ssh_data: Enable/disable export of SSH key exchanges parameters and negotiated SSH key exchange method
• http.dga_url: Enable/disable detection of DGA-like patterns in HTTP URL paths
• dns.custom_port: Enable DNS detection on one additional user-selected TCP or UDP port

Important improvements and bux fixes

• tests: improve parallelization in #3027
• Build system: lots of improvements about speed, stability, cross-compilation, portability, parallelization and out-of-tree builds
• Fuzzing: lots of changes to improve fuzzing coverage and speed
• croaring: update to 4.4.2 (from 4.3.6) in #3030
• Extend s7comm dissector with metadata extractions in 9e98096
• Reworked TLS dissector to export further metadata in #3066
• Added ability to export SSH key exchanges and negotiated SSH key exchange method in #3067
• Enhanced TLS blocks computation and included in nDPI Fingerprint in #3071
• Fix HTTP hostname normalization with IPv6 literal address in #3081
• NTP metadata export in #2768
• Extended IPSEC dissection and added metadata extraction in ae586c8
• Remove Whatsapp IPs list: Meta doesn't provide it anymore in #3153
• Improve HAProxy to support Proxy Protocol v2 as well in #3165
• Improved GearUP Booster proprietary TCP protocol detection in #3168
• Improved LagoFast detection pattern in #3171
• Fix urls for downloading google crawlers in #3191
• Add Webex STUN sub-classification in #3194
• Improve HBO Max/Max streaming detection in #3193
• activision: classify Warzone game session in #3199
• Fix DNS TCP reassembly for split segments in #3201
• Detect DGA-like patterns in HTTP URL paths in #3228
• DNS: support an opt-in custom detection port in #3223

New Contributors

• @cmonroe made their first contribution in #3075
• @OwenSanzas made their first contribution in #3128
• @matheusgstolf made their first contribution in #3143
• @parasol-aser made their first contribution in #3163
• @BryanProg made their first contribution in #3179
• @netcons made their first contribution in #3187
• @yalanmao made their first contribution in #3202
• @smtobs made their first contribution in #3201
• @shalseth made their first contribution in #3225
• @Dulend made their first contribution in #3221
• @RajaMuhammadAwais made their first contribution in #3228

Full Changelog: 5.0...x