Operational policy does not crash websites

Warley
Warley Posts: 8  Freshman Member
Zyxel Certified Network Administrator - Security First Comment

Hello
I have a situation on the firewall flex 200 where the operational policy is not applying to some machines.We have this policy where all sites are blocked, except sites that are on the trusted list.However, on some machines the lock is not applying, using the Mozilla Firefox browser, the websites are locked, but when I browse through Google Chrome or Edge, the websites enter normally.

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  • Zyxel_Melen
    Zyxel_Melen Posts: 2,577  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate

    Hi @Warley,

    I would like to check with you:

    1. Could you share more details about this policy? Like: Does this policy apply a content filter?
    2. What DNS server setting/IP address do these problem machines use?

    Zyxel Melen


  • Warley
    Warley Posts: 8  Freshman Member
    Zyxel Certified Network Administrator - Security First Comment

    Hello
    According to the Image, it is done by Content Filter.
    I noticed that on these machines the rule only works in the Mozilla Firefox browser, on Google Chrome and Edge the pages do not crash..

    Follow images from navigation on the same website on mozilla and google, only on mozilla the website crashes.

    Ghrome

  • Zyxel_Melen
    Zyxel_Melen Posts: 2,577  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate
    Answer ✓

    Hi @Warley,

    Thanks for the detailed information. After checking, this could be due to the Chrome upgrade (support TLS1.3 Kyber).

    Please help to use this weekly firmware to fix this issue.

    Please feel free to let me know if there is still an issue after the firmware upgrade.

    Zyxel Melen


  • Warley
    Warley Posts: 8  Freshman Member
    Zyxel Certified Network Administrator - Security First Comment

    Thank you, it worked!

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