Installing Let's Encrypt on Go Server

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My domain is:

I ran this command:
sudo certbot certonly --standalone --preferred-challenges tls-sni -d

It produced this output:
Client with the currently selected authenticator does not support any combination of challenges that will satisfy the CA.

My web server is (include version):
Ubuntu 18.04

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):
certbot 0.31.0

How can I install SSL for a server using Go? I have installed it on Nginx and Apache but never installed with Go.

I’m getting error with both the port 80 and 443 for standalone and my Go Server is using port 80.

Hi @saumyabratadutt

Certbot doesn’t support tls-sni.

That’s not defined.

Use a defined combination.

If your Go program has an embedded webserver and you don’t want to use a reverse proxy, you may as well use autocert:

No need for an external ACME client like Certbot.

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