zyxel flex 50 - different throughput beetwen ipsec vpn and lan ports

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nocrcs
nocrcs Posts: 6
First Comment

hi, I have an ipsec site to site vpn on my zyxel usg flex 50 with another firewall

zyxel's firmware is 5.38

When I transfer a file from my client to remote server on vpn, I see a different throughput beetwen ipsec vpn and client's ethernet port. First is 64Mbps but client's ethernet speed is 10Mbps

Why? My client is patched directly to zyxel with cat6 cable and port negotiate 1Gb

Accepted Solution

  • nocrcs
    nocrcs Posts: 6
    First Comment
    Answer ✓
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    speed test from my client without vpn is 400Mb/30Mb

All Replies

  • PeterUK
    PeterUK Posts: 2,907  Guru Member
    Community MVP First Anniversary 10 Comments Friend Collector
    edited May 20
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    What is a speed test for download and upload without a VPN?

  • nocrcs
    nocrcs Posts: 6
    First Comment
    Answer ✓
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    speed test from my client without vpn is 400Mb/30Mb

  • PeterUK
    PeterUK Posts: 2,907  Guru Member
    Community MVP First Anniversary 10 Comments Friend Collector
    edited May 20
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    How is the CPU on flex when transfer a file by VPN?

    In monitor > traffic Statistics uncheck Collect Statistics

  • nocrcs
    nocrcs Posts: 6
    First Comment
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    cpu is ok, less than 50%

    statistics and other features are disable

    antispam, malware etc are disable

  • PeterUK
    PeterUK Posts: 2,907  Guru Member
    Community MVP First Anniversary 10 Comments Friend Collector
    edited May 20
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    Could the other firewall be slowing things down?

  • nocrcs
    nocrcs Posts: 6
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    no because vpn throghput on my zyxel is 80Mb, but speed lan is 10Mb

  • nocrcs
    nocrcs Posts: 6
    First Comment
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    So, I have an update. VPN throughput and lan speed are equal now. But why is vpn speed less than internet bandwidth?

    Example: download/upload from zyxel's wan are 400/30Mb but vpn speed is 10Mb

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