UDP Flood issue (Zywall USG 100)

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  • mMontana
    mMontana Posts: 1,443 image  Guru Member
    Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Switch 50 Answers 1000 Comments
    By chance... uPNP is enabled on the device?
  • follet
    follet Posts: 32 image  Freshman Member
    First Comment Friend Collector Third Anniversary
    mMontana said:
    By chance... uPNP is enabled on the device?

    Thank you for answer. I managed internet suggestions, but I can't find uPNP on my Zyxel Zywall USG100.

  • follet
    follet Posts: 32 image  Freshman Member
    First Comment Friend Collector Third Anniversary
    Answer ✓
    I solved this issue!!!
    I appreciate your help and suggestions!

    I just turned ON the checkbox "Firewall" thus, port 53 closed automatically, and the active session pool became in a normal state!


  • mMontana
    mMontana Posts: 1,443 image  Guru Member
    Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Switch 50 Answers 1000 Comments
    Glad you solved. Which "Firewall" checkbox?
  • follet
    follet Posts: 32 image  Freshman Member
    First Comment Friend Collector Third Anniversary
    Turn ON the firewall at all.

    I even disabled unused rules (like denying UDP packages).
  • mMontana
    mMontana Posts: 1,443 image  Guru Member
    Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Switch 50 Answers 1000 Comments
    :o holy caramel mou!
    I was not seeing that coming!

    That made the world of difference....

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