Hi there,
I’ve setup OpenVPN and made it working following this tutorial ; https://www.digitalocean.com/community/tutorials/how-to-set-up-an-openvpn-server-on-ubuntu-14-04
But when I do speed test on my local computer without VPN, I’ve got 25 mbits ( Expected ISP speed ) but when I do the test with VPN, it’s around 15-16 mbits with 60ms ping. I understand the ping but internet speed shouldn’t be that impacted.
Here you can see the speedtest runned on droplet,
Retrieving speedtest.net configuration...
Retrieving speedtest.net server list...
Testing from DigitalOcean (146.185.168.242)...
Selecting best server based on latency...
Hosted by DEAC (Amsterdam) [2.18 km]: 4.038 ms
Testing download speed........................................
Download: 897.90 Mbit/s
Testing upload speed..................................................
Upload: 399.46 Mbit/s
Down here you can see the openvpn/server.conf
# Which TCP/UDP port should OpenVPN listen on?
# If you want to run multiple OpenVPN instances
# on the same machine, use a different port
# number for each one. You will need to
# open up this port on your firewall.
port 1194
# TCP or UDP server?
;proto tcp
proto udp
And here my UFW configuration, I use 80 and 8080 ports for my nginx webserver
Status: active
To Action From
-- ------ ----
22 ALLOW Anywhere
1194/udp ALLOW Anywhere
80/tcp ALLOW Anywhere
8080/tcp ALLOW Anywhere
22 (v6) ALLOW Anywhere (v6)
1194/udp (v6) ALLOW Anywhere (v6)
80/tcp (v6) ALLOW Anywhere (v6)
8080/tcp (v6) ALLOW Anywhere (v6)
Thanks in advance
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
Want to learn more? Join the DigitalOcean Community!
Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.
The results you are getting are about what is expected. There is something known as bandwidth delay product, which loosely translated basically means that the maximum throughput will be affected by the latency between the two hosts.
So for an example, if you have to hosts, let’s say both are on a 1Gbps connection, if they were located within 1ms of each other then the maximum throughput between those hosts would be 1Gbps.
However, as the hosts are located geographically further apart and the latency between them increases then even if both hosts are on a 1Gbps connection, their maximum throughput begins to decrease. That means if you are 70ms apart, assuming standard packet sizes, you will get about 60% of the theoretical maximum throughput or about 600-800Mbps.
Given, that you are on a 25Mbps connection and then with 60ms latency to your VPN, to receive around 15Mbps is about what is expected given the latency.
If you want to improve your performance you would have to host your VPN somewhere closer to you so that you can get that latency down below 50ms and ideally around 20ms.
Also the decrease is non-linear, so the further away you are the more impact you will see.
Usually the 50ms-80ms is good enough to not notice a slowdown through use, but for heavy transfer, like streaming video there maybe some impact.
Lastly, you also need to consider the latency between the your VPN and the the final destination, as that will add another layer of latency.