Error getting certificate

[jais]

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. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:prometheus.unitycollege.sa.edu.au

I ran this command:sudo certbot --nginx

It produced this output: DNS problem: NXDOMAIN looking up A for prometheus.unitycollege.sa.edu.au - check that a DNS record exists for this domain; DNS problem: NXDOMAIN looking up AAAA for prometheus.unity.college.sa.edu.au - check that the dns record existts for this domain

My web server is (include version):2.15.2

The operating system my web server runs on is (include version):ubuntu 20

My hosting provider, if applicable, is:nginx

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

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

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):1.30.0

[_az]

Like the error says, the domain needs to be accessible from the internet.

According to public DNS, prometheus.unitycollege.sa.edu.au does not have any DNS records.

[jais]

Is there any other way to get the certificate? Because it is inside the organisation network and I don't really want to publish it.

Thank you

[_az]

Sure, you can try use the DNS challenge. It's still requires you to programmatically update TXT records in your DNS zone at every renewal, though.