Let's encrypt for dummies

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As mentioned by @ahaw021 in How to Renew Certificate 101 (Synology DSM), you can check Synology’s Documentation - Certificates to do your bidding.

Basically, you need to do the following in your Synology interface:

  1. Open Control Panel (Icon) > Security (Icon in Connectivity) > Certificate (Tab)
  2. Click Add.
  3. Select Add a new certificate (Should be selected by default) and click Next.
  4. Select Get a certificate from Let’s Encrypt.
  5. Specify the following information:
    1. Domain name: Enter the domain you have registered from the domain provider.
    2. Email: Enter the email address used for certificate registration.
    3. Subject Alternative Name (I don’t think you need this, so skip it): To allow one certificate to cover multiple domains, enter the other domain names here.
  6. Click Apply to save the settings.

Once confirmed, the certificate will be instantly imported into your Synology NAS.

Note that you need port forwarding as your Synology box needs to be reacheable from the Internet (Let’s Encrypt will try to connect to it to confirm its identity).

I hope this helps :grin: !

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