Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

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eranati's avatar
eranati
Icon for Nimbostratus rankNimbostratus
Nov 25, 2019

Device ID

Hi,

About device ID - How F5 fingerprints a device?

 

3 Replies

  • Lidev's avatar
    Lidev
    Icon for Nacreous rankNacreous
    Nov 25, 2019

    Hi eranati,

    The fingerprint is created from information retrieved from the client's browser (User Agent, cookies, Hash, captcha challenge and so on...)

  • eranati's avatar
    eranati
    Icon for Nimbostratus rankNimbostratus
    Nov 25, 2019

    Where can I find the exact method of this fingerprinting?

  • Lidev's avatar
    Lidev
    Icon for Nacreous rankNacreous
    Nov 25, 2019

    F5 keeps this information secret for obvious security reasons