Openvpn server poor throughput -AX88u

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Regular Contributor

I have been running an openvpn client in the AX88u for some time now and the performance has been really good (more than 200Mb/s average) using 600Mb symetric in both server (server is an ubuntu 20 machine with an i7 8th processor) and client sides.
Now trying to invert the configuration, so AX88u should act as openvpn server and the ubuntu machine as client, with exactly the same WAN speeds, the performance drop to aprox 40Mb/s only

VPN server is set as tun udp, using AES-128-CBC (also tested with AES-128-GCM) , SHA1 and lz4-v2 compression (tested with disabled as well).

Running 386.2

Is there any other configuration I should take into account to improve the openvpn server performance?



Occasional Visitor
Delete all of that since you accidentally tried the wrong thing - go in and for vpn select Ike/2 and problem fixed.

Honestly I have no idea - tried to configure it once and followed the docs for it but didn’t work and said screw it.


Regular Contributor
Thanks @redpaw.rider but for ipsec I have an additional issue. After I see a good performance in the vpn I need to move the configuration to another brand router and ipcsec doesn't have user credentials as it the only option for ipsec is a site to site setup. I have not found any way to set the ipsec in the asus without the user authentication, so is there any way to get the ipsec server up as site to site without the user credentials requirement?

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