Perform speedtest on NAS Synology

This guide explains how to perform a command line speed test (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.

Speedtest tool configuration

To install the SynoCli Monitor Tools package:

1. From the DSM interface, access the Package Manager.
2. Click on the button Parameters in the taskbar, then go to the tab Package source.
3. Click on the button Add.
4. Fill in the fields as follows:
   • Name : SynoCommunity
   • Location : https://packages.synocommunity.com/
5. Validate both windows by clicking on Okay..
6. In the left-hand menu, a new tab entitled Community will appear. Select it, then install the package SynoCli Monitor Tools.

SSH connection activation

In order to activate the SSH service:

1. In the DSM interface, open the Control panel.
2. Click on the tab Terminal & SNMP in 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.

Launch of iPerf server

To connect to the NAS via SSH:

1. Open a console on your computer:
   • Terminal for macOS,
   • PowerShell or Order Invite for Windows,
   • Shell for Linux.

2. Run the following command:

   ssh nom_utilisateur_dsm@ip_du_synology
   

3. Enter the password of your DSM account and then confirm with the Enter key.

4. Once connected to SSH, run the iPerf server with the following command:

   iperf3 -s

Launch of the speed test

In order to download and run the iPerf3 client:

1. Download iPerf3 executable for your operating system from the official website.
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 test result will show up after a few seconds. You will then be able to view bandwidth rates in sending and receiving between your computer and your Synology NAS.