Introduction

Securing your website with HTTPS is crucial for protecting data and building trust with your visitors. This guide will walk you through installing an SSL certificate on your Synology NAS using the Domain Name System (DNS) Manager (DSM).

Step-by-Step Guide

1. Prepare Your SSL Certificate Files

Before starting, ensure you have the following files:

• Private Key (.key): Generated during SSL setup.
• Certificate (.crt): Issued by your Certificate Authority (CA).
• Intermediate Certificate Bundle (.ca-bundle): Provided by your CA.

2. Access Your Synology NAS

1. Log in to your Synology NAS using your administrator credentials.
2. Open the DSM Control Panel.

3. Navigate to Security Settings

1. Go to Security > SSL/TLS Certificates.
2. Click on Add and select Import an Existing Certificate from the dropdown menu.

4. Import Your SSL Files

1. Enter a name for your certificate in the Certificate Name field.
2. Browse and upload your Private Key, Certificate, and Intermediate Certificate Bundle files.
3. Click Apply to import the files.

5. Configure HTTPS Redirection

1. Navigate to Network > DSM Settings.
2. Tick the box for Automatically redirect HTTP connections to HTTPS.
3. Apply your changes.

6. Verify SSL Installation

• Use an online tool like SSL Labs' SSL Checker to confirm your SSL settings.
• Ensure your domain resolves to HTTPS by visiting https://your_domain.com.

Notes and Tips

• Backup: Always backup your NAS configuration before making changes.
• HTTPS: Ensure all services using your domain are configured to use port 443 (HTTPS) or your specified HTTPS port (e.g., 5001).
• Support: If you encounter issues, refer to Synology's documentation or contact their support for assistance.