Subject alternative name


I am new to NAS synology.

I do not have a “subject alternative name” and can not create certificate with Let’s Encrypt.
please help



Hi @mojtaba9

you need a public visible domain name. One is enough.


thanks for the reply
what is that ?


I created a certificate with but did not asked for SAN so I can not provide one when Let’s Encrypt asks for that.


Do you have a domain name you can share? You must have a worldwide visible, public and unique domain name.

Something like

If you have only a name like, localhost.localhost or something else:

Letsencrypt can’t create a certificate.


Synology provides free names.

closed #7

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