OPNsense Forum
Archive => 20.7 Legacy Series => Topic started by: hypemedia on October 24, 2020, 02:17:41 am
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I have a OpenVpn Server config that is very slow I get transfers of 800Kb/s via the VPN while without the VPN the speed is around 30 Mb/s
The VM is running on KVM.
AES-256-CBC
SHA256
The CPU is an Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz (2 cores).
Any ideas on what it can be. I have tried also lower security encryption and different configurations but the speed is the same.
Is there anything that I can do to improve this?
The CPU is at 100%.
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The CPU is at 100%? Only when OpenVPN is enabled or always?
Your CPU should be capable of much more.
Maybe the throughput bottleneck is the other side of the tunnel?
I optimized my throughput by trying different values for the custom option: tun-mtu 1500
Tjis is obviously only for a tun device.
Don’t know if it’s still needed but smb transfer speed were much higher with this option than without.
In any case your CPU should not be at 100%.
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The problem was an old version of KVM after the upgrade the speed went normal.