elchubi I have one 200 Mbps link from which I get 494 Mbps (measuring with iperf) when using openvpn with compression and no encryption, however when I use a 2 Gbps link I get only 535 Mbps, same hardware and configuration. Cpu goes to 77% and RAM is not being touched. Why are these tun0 being speed limited? thanks
krzee are both sides 2gb? see if tuning your MTU helps https://community.openvpn.net/openvpn/wiki/Gigabit_Networks_Linux
