Wireguard, strange speedtest result outside the VPN when the VPN is up

[Phil]

Hi, i don't understand Speed test results:

Site A: Opnsense is Wireguard server.
Fiber 1Gb/s d/l and 700Mb/s U/L theorical (but in test it's about D/l: 800Mb/s, U/L 300Mb/s)

Site B: Opnsense but i use Wireguard windows client.
About same connexion speedtest result than A

When the VPN is up, on Lan Site A, launching via VNC speedtest (traffic is outside the VPN):
Result about:
D/L: 115Mb/s ?
U/L: 600Mb/s ?
If i close the VPN and connect via Teamviewer: speedtest comeback to normal value (D/l: 800Mb/s, U/L 300Mb/s)

On the client (checked ip it's his own external ip so it's outside the VPN)
It's about same result than without the VPN:
D/l: 800Mb/s, U/L 300Mb/s

And Traffic in the VPN:
D/l from: A to B
It's trottling from 6 to 18Mo/s (average seems 10Mo/s)
U/L from B to A
It's trottling from 3 to Max 14Mo/s (average seems 5Mo/s)


Why when the tunnel is up the D/L test on speedtest (so outside the VPN give only 115Mb/s and U/L the huge 600Mb/s on server?
It does the same for you?


And about bandwith in the VPN is it normal result for 1Gb connexion?

Thx for help to understand certainly something wrong in my config but i don't know what?

Best regards