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I just ran a few tests, at this time (5 - 5:30 PM).
I am connected through a 4G LTE (Alfa) phone with wifi hotspot, on a Windows laptop.
Without VPN it is fast and responsive, speedtest is 50Mbps download, no complaint at all.
However I am unable to achieve acceptable performance through VPN. I tried the following:
- OpenVPN server in Silicon Valley and London with the Pritunl client on the laptop.
- NordVPN server in USA and France with the NordVPN client on the laptop.
The connection is too slow to even load the speedtest page.
When I disable tethering and use a VPN client and run tests on my mobile phone I can get up to 10Mbps download for the London VPN which is much slower than the 80Mbps that I can get through direct connection, but still acceptable speed for my use.
What are your experiences on the topic and do you know why there would be such a dramatic loss of performance?
Last edited by rolf (July 2 2019)
Most likely MTU issue, check over internet how to solve it.
Most likely MTU issue, check over internet how to solve it.
Thank you. I had already optimized the buffer on my OpenVPN server (obviously, I can't do this for the NordVPN server). I checked the config and the optimization is gone for some reason.
I will also tweak the MTU/MSS.
Well, I spent the last hour doing tests, and all I got is "LATENCY ERROR". I could only load speedtest.net 3 or 4 and the fastest I saw is 10Mbps.
Then I thought let's try to reboot into Linux.
Now the test works every time, no more errors. I removed all my tweaks and I get reach 24Mbps on my VPN and 35Mbps on NordVPN server.
So something wrong with Windows.
Eeek.
you tested openvpn using tcp or udp?
I'm using UDP. I think there is something wrong with Windows.
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