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FoxIO-LLC/ja4

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JA4+ is a suite of network fingerprinting standards

5 mentions on Hacker News by 5 people: 1 story, 4 comments · first 2025-02-05 · latest 2026-09-09

Mentions per year 5 mentions · busiest year 2025 (4)
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  1. There's also the JA4+ suite ( https://github.com/FoxIO-LLC/ja4 ), in addition to standard JA4.
    comment by johneth · 2026-09-09 · in Understanding the recent DDoS attack against Read the Docs
  2. Network fingerprinting, like https://github.com/FoxIO-LLC/ja4
    comment by mrbluecoat · 2025-08-28 · in Ask HN: The government of my country blocked VPN access. What should I use?
  3. ▲ 2
    JA4: A suite of network fingerprinting standards
    story by fanf2 · 2025-06-17 · 0 comments
  4. …uses JA3 and now JA4 TLS fingerprints, which are hashes of various TLS handshake parameters. https://github.com/FoxIO-LLC/ja4/blob/main/technical_details... has more details on how that works, and they do offer an Nginx module:…
    comment by aaron42net · 2025-04-03 · in Curl-impersonate: Special build of curl that can impersonate the major browsers
  5. To echo further, they may be leaning on something like the [ja4 fingerprint]( https://www.google.com/url?sa=t&source=web&rct=j&opi=8997844... ) (which you'd need to rebuild curl to emulate that chromium version to try and trick).
    comment by bennyg · 2025-02-05 · in Tell HN: Cloudflare is blocking Pale Moon and other non-mainstream browsers