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

nocrcs

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

nocrcs

speed test from my client without vpn is 400Mb/30Mb

PeterUK

What is a speed test for download and upload without a VPN?

nocrcs

speed test from my client without vpn is 400Mb/30Mb

PeterUK

How is the CPU on flex when transfer a file by VPN?

In monitor > traffic Statistics uncheck Collect Statistics

nocrcs

cpu is ok, less than 50%

statistics and other features are disable

antispam, malware etc are disable

PeterUK

Could the other firewall be slowing things down?

nocrcs

no because vpn throghput on my zyxel is 80Mb, but speed lan is 10Mb

nocrcs

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