USG40

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alex16
alex16 Posts: 2 image  Freshman Member

My USG40 is running firmware 4.11. I can't update it to the latest firmware 4.73. I need the archived firmware versions 4.15, 4.20, and 4.25. Where can I download them?

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  • Zyxel_Tina
    Zyxel_Tina Posts: 855 image  Zyxel Employee
    Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Switch 100 Answers 500 Comments

    Hi @alex16,

    Welcome to the Zyxel Community!

    Please note that USG40 is already in EoL status. This means our support scope is limited. For long-term use and better security coverage, we recommend considering our current firewall models listed on our website.

    Next-Gen Firewall | Zyxel Networks

    Zyxel Tina

  • PeterUK
    PeterUK Posts: 4,502 image  Guru Member
    250 Answers 2500 Comments Friend Collector Eighth Anniversary
    edited May 11

    What the problem that your can't update? As in you apply the update but falls back to to the old firmware on reboot?

    You may need to back up your config then factory reset to the apply the firmware update then upload your config and apply by Ignore errors and finish applying the configuration file