I followed this tutorial https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-20-04
and when I write this command sudo certbot --nginx -d example.com -d www.example.com with my own domain, I get this error
Challenge failed for domain goldenpay.click Challenge failed for domain www.goldenpay.click http-01 challenge for goldenpay.click http-01 challenge for www.goldenpay.click Cleaning up challenges Some challenges have failed.
The following errors were reported by the server:
Domain: goldenpay.click Type: dns Detail: DNS problem: SERVFAIL looking up A for goldenpay.click - the domain’s nameservers may be malfunctioning; DNS problem: SERVFAIL looking up AAAA for goldenpay.click - the domain’s nameservers may be malfunctioning
Domain: www.goldenpay.click Type: dns Detail: DNS problem: SERVFAIL looking up CAA for goldenpay.click - the domain’s nameservers may be malfunctioning
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Indeed, in order for Let’s Encrypt to be able to validate your domain name, you need to first change your A record to point to the server’s IP address.
You can follow the steps on how to do that here: