Synology NAS Tip – How to manually refresh a Lets Encrypt SSL Certificate

In this video we take a look at how you can manually refresh the Lets Encrypt SSL certificate being used by your Synology NAS. While your NAS is able to automatically renew your Lets Encrypt certificate every three months. There are certain scenarios, were you may find that your Synology NAS is unable to update its SSL certificate.

Its also worth noting that recently, Let’s Encrypt had to revoke 3 million certificates due to a coding error – the – Lets Encrypt? Lets revoke 3 million HTTPS certificates on Wednesday – so its worth knowing how to manually update your Lets Encrypt certificate.

Quick reference notes:

  • Log into Disk Station Manager (DSM) with administrators privileges
  • Open Control Panel
  • Under Connectivity select Security
  • From within Security choose the Certificate tab
  • Highlight the Lets Encrypt certificate you want to update
  • Select the drop down menu next to the Add button
  • A “Create certificate” wizard will open
  • Select Apply to update your Lets Encrypt certificate

Notes: The “Create certificate” will warn you that on your NAS you need to have DNS properly configured, and that Disk Station Manager is accessible from either WAN Ports 80 or 443. If you have been following our video series on How to setup and configure a Synology NAS. These network settings will be correctly configured.

Reference materials:

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