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OpenVPN: Slow external (via Internet) connection via VPN (UDP and TCP / with and without compression)

Markus Schlueter

Hi there,

although I have a 100MBit (down) / 40 Mbit (up) Internet connection (I get at least 89 / 35) the network speed via VPN tunnel (over LTE 300MBit or another stationary Internet connection 150MBit / 10 MBit) is horrible slow (max. 6 MBit up and down).

I already tested to enable / disable compression, used TCP / UDP protocol and change the cryptographic settings (Key Size, etc.) -> nothing helped...

I did not configure a QOS setting for the firewall rules allowing the traffic between WAN / LAN.

 

Any ideas?



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