USG FLEX 500 speed

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Fabio
Fabio Posts: 33 image  Freshman Member
First Comment Seventh Anniversary
in Security
Screenshot 2026-02-24 165849.png

we recently change our firewall with an USG flex 500

But we encounter a speed problem

we have several internet lines all are for 500mb/sec

but the speed sees the line has a very low upload speed.

This is not a performance of the line if we test with a different router the speed is correct

someon eknow how to solve it ?

Screenshot 2026-02-24 164942.png

All Replies

  • Zyxel_Judy
    Zyxel_Judy Posts: 2,347 image  Zyxel Employee
    Zyxel Certified Network Engineer Level 2 - Nebula Zyxel Certified Network Engineer Level 2 - Switch Zyxel Certified Network Engineer Level 2 - Security Zyxel Certified Network Engineer Level 1 - Nebula

    Hi @Fabio ,

    To better assist you, could you please provide the following information:

    • Speed Test Topology: What is your speed test setup? For example, is your PC connected directly to the USG FLEX 500H?
    • Speed Test Tool: What tool are you using to perform the speed test?
    • Security Services: Are any security services currently enabled on the USG FLEX 500? If possible, please share your device configuration so we can review it.
    • Speed Test Results: What speeds are you getting during the test?

    Additionally, please note that the USG FLEX 500 has a built-in speed test tool. To use it, navigate to Maintenance > Diagnostics > Network Tool, select Speed Test, run the test, and share a screenshot of the results with us.

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    Zyxel_Judy

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