Can I improve the performance of my VPN?
I have a Linode that is under the 'Linode 512' plan that I don't think is available any more. It runs CentOS 6.6. I recently followed the instructions in the Linode library about setting up a VPN. When I got it all going I ran a test through speedtest.net to compare its download speed to when I access the net just through my normal ISP (Virgin Media). Over a period of time I observed that the upload speed was always around 11.6Mbps but the download speed fluctuated wildly between 6.4Mbps and 75.9Mbps. When I access the net through my ISP only the download speed is constantly around 157Mbps and the upload around 12.2Mbps.
I would like to know if there is anything I can do to improve the performance/stability of my Linode as a VPN?
BTW - There is a pending upgrade for the Linode that will upgrade it to a 'Linode 2GB' plan.
push "sndbuf 393216"
push "rcvbuf 393216"
these tweaks, maximizes my connection on my openvpn.
I would HIGHLY recommend this script to setup an OpenVPN. Its ridiculously easy.
Try benchmarking the fastest DNS servers to your linode. That might help also.