Replace Certificate in Synology NAS

Replace Certificate in Synology NAS

Fill up info

Following steps can be used to replace certificate (not renew) in Synology NAS user interface.

  • Go to Control Panel -> Security -> Certificate
  • Select Add -> Add
  • Select Replace an existing certificate
  • Choose the certificate to be replaced
  • Select Get a certificate from Let's Encrypt
  • Fill up info, includes domain, email, alias (seperated by semi-colons)

Change port forwarding

Now, make sure Synology NAS can be accessed from internet via port forwarding at port 80 and 443 if required.

Suggest using A * record in DNS entry to avoid DNS change. Use NGINX to redirect traffic to this host.


Then generate certificate.

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