Perform a speedtest on Synology NAS

This guide explains how to perform a speed test from the command line (iPerf CLI) between your computer and your Synology NAS. These tests can help you evaluate the download and upload speeds of your Internet connection to and from your NAS.

Configuration of the Speedtest tool

To install the package SynoCli Monitor Tools:

1. From the DSM interface, go to the Package Center.
2. Click on the Settings button in the taskbar, then go to the Package Source tab.
3. Click on the Add button.
4. Fill in the fields as follows:
   • Name : SynoCommunity
   • Location : https://packages.synocommunity.com/
5. Confirm the two windows by clicking on OK.
6. In the left menu, a new tab labeled Community will appear.
7. Select it, then install the package SynoCli Monitor Tools.

Enabling the SSH connection

To enable the SSH service:

1. In the DSM interface, open the Control Panel.
2. Click on the Terminal & SNMP tab on the left menu.
3. Check the box Enable SSH service.
4. Click on Apply to validate.
   • If you no longer need the SSH connection after the test, you can uncheck this box to disable the service.

Starting the iPerf server

To connect to the NAS via SSH, from a terminal application (command line interface, CLI) on your device:

1. Run the following command:

   ssh nom_utilisateur_dsm@ip_du_synology

2. Enter the password for your DSM account, then press Enter.

3. Once connected via SSH, launch the iPerf server with the following command:

   iperf3 -s

Speed test launch

To download and run the iPerf3 client:

1. Download the iPerf3 executable for your operating system from the official site.
2. Open a new console.
3. Navigate to the folder where the iPerf3 executable is located.

4. Run the following command:

   iperf3 -c ip_du_synology

5. The results of the tests will appear after a few seconds. You will then be able to view the bandwidth throughput for uploads and downloads between your computer and your Synology NAS.