OpenVPN server migration from Debian to pfSense : low perf (half speed!)
I decided to migrate to my openvpn server from a Debian VM to a pfSense VM (on the same hypervisor, with the same ressource -CPU/RAM- for both VMs, using virtio as driver for every network interface).
here are my configuration from both server : https://pastebin.com/w0grvZrr
With pfSense server, I get 50% less speed, and I still don't know why.
Results with iperf (iperf -V -i 1 -t 30 -c ping.online.net), same client :
pfSense server : 0.0-30.0 sec 452 MBytes 126 Mbits/sec
Debian server : 0.0-30.0 sec 867 MBytes 242 Mbits/sec
I try to change some information like encryption algorithm (AES-128-cbc to default Blowfish), TCP to UDP, but it's always way more slower.
=> Any idea on where could be the bottleneck ?