Upload speed on Zyxel VPN100

FrontierDK Posts: 3
Nebula Gratitude First Comment
edited April 2021 in Security

Hi all.

Just bought a Zyxel VPN100 and put it on my fiber 1000/1000 line. My problem is...when I run a speed test, no matter where and when, I never get past 400Mbit on upload speed. It doesn't matter which PC or server I use, and it doesn't matter what speed test site I use...

The paper for the firewall said 2Gbit firewall...it doesn't exactly look it. And even if I disable the firewall (policy control), it doesn't change past 5-10%...

All Replies

  • PeterUK
    PeterUK Posts: 2,702  Guru Member
    First Anniversary 10 Comments Friend Collector First Answer

    The 2Gbit firewall is based on UDP not TCP

    Is your download good?

    Try this speed test


    The VPN100 likely has 4 cores and TCP is per thread limited so some sites may test the upload on a single thread.  

  • That site gave me even poorer results: 598 down, 143.6 up.

    I guess I won't be selling any VPN100 to clients with fiber...

  • Zyxel_Jerry
    Zyxel_Jerry Posts: 1,052  Zyxel Employee
    First Anniversary 10 Comments Friend Collector First Answer

    Hi @FrontierDK

    Is your VPN100 running on standalone or SD-WAN mode?

    Do you have any VPN connection in your environment?

  • Hi Zyxel_Jerry,

    it's running in stand-alone mode. No VPN has been set up.

  • Zyxel_Vic
    Zyxel_Vic Posts: 281  Zyxel Employee
    First Anniversary 10 Comments Friend Collector First Answer

    Hi @FrontierDK

    Usually the throughput is tested by using a test machine with multiple ump sessions to approach the maximum bandwidth as RFC 2544 identified. In your case, we think the throughput you got is a little bit strange (DL 598Mbps/UL 143Mbps). What if you connect your PC directly to the internet without VPN100?? Can you share your config file with us in private message??

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