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594b219 · Jan 14, 2025

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This branch is 29 commits behind FoxIO-LLC/ja4:main.

technical_details

JA4+ Technical Details

Full Name Short Name Description
JA4 JA4 TLS Client Fingerprinting
JA4Server JA4S TLS Server Response / Session Fingerprinting
JA4HTTP JA4H HTTP Client Fingerprinting
JA4Latency JA4L Latency Measurment / Light Distance
JA4X509 JA4X X509 TLS Certificate Fingerprinting
JA4SSH JA4SSH SSH Traffic Fingerprinting
JA4TCP JA4T TCP Client Fingerprinting
JA4TCPServer JA4TS TCP Server Response Fingerprinting
JA4TCPScan JA4TScan Active TCP Fingerprint Scanner

The full name or short name can be used interchangeably. Additional JA4+ methods are in the works...

Please contact john@foxio.io for in-depth implementation details.

JA4

JA4S

JA4H

JA4T

JA4X

JA4SSH

JA4L

License

See Licensing in the repo root. We are committed to work with vendors and open source projects to help implement JA4+ into those tools. Please contact john@foxio.io with any questions.

Copyright (c) 2024, FoxIO