How to test the network speed between Starlight VM and test servers?

To check the speed between your VM and public servers, we recommend using the iPerf tool with a server that’s geographically close to you. You can install iPerf on your Virtual Machine here

Keep in mind that the results can be affected by factors outside of our infrastructure, such as:

  • Distance to the test server — the farther the data has to travel, the lower the speed may be

  • Routing between ISPs — some network paths may experience congestion or traffic shaping

  • General internet load — overall internet conditions can vary throughout the day

Once iPerf is installed, run a test with the following configurations:

1) For Phoenix, US:

Measure upload speed:
iperf3 -c speedtest.phx1.us.leaseweb.net -p 5201-5210
Measure download speed
iperf3 -c speedtest.phx1.us.leaseweb.net -p 5201-5210 -R
Note: Wait a few minutes between two sequential tests

2) For Singapore, Asia:

Upload:
iperf3 -c sgp.proof.ovh.net -p 5201-5210
Download:
iperf3 -c sgp.proof.ovh.net -p 5201-5210 -R


If you need to test speed to another test server, you can find the extended iPerf server list here

Note: Test servers can sometimes limit how many tests you run at once or back-to-back, so you might see rate limiting or slightly inaccurate results. It’s best to wait a bit between tests.

If you’ve already tried that and are still getting consistently low speeds (across different test servers and times), feel free to reach out to us and share your test results.

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