Im a beginer for create ssl

Hello, i have one NAS synology at my home.

How to create a ssl certificate.


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Hi @Anju

Synology has integrated solutions you can and should use. There are a lot of users with Synology NAS and Letsencrypt certificates.

If you have a DSM, start there:



I have try to add a crt and key but i have error “connection to Letsencrypt is impossible”.

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Then please answer the following questions:

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g., so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:

I ran this command:

It produced this output:

My web server is (include version):

The operating system my web server runs on is (include version):

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don't know):

I'm using a control panel to manage my site (no, or provide the name and version of the control panel):

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):

i not understand sorry

I would suggest asking on the Synology forum at

This is entirely dedicated to Synology support and there may be more people who can help you understand your problem.

I think the problem is going to be with your Internet connection in some way, though, because of the error that you got.

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