TCP retransmission -> slow speeds

[hugomueller 13]

Since I have a 400Mbit/s connection the VPN speed dropped significantly.

The problems started after upgrading my internet connection to 200Mbit/s:

https://airvpn.org/topic/23851-guide-fast-internet-connection-slow-vpn-speeds/

 

This could be solved by changing the MTU size.

Now I have 400Mbit/s and the VPN speed is dropping and even changing MTU does not solve the issue.

 

 

I started analyzing the issue with wireshark and found tons of "TCP retransmissions".

 

 

Any idea that to do?