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:
sudo certbot certonly --standalone
It produced this output:
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for
Waiting for verification...
Challenge failed for domain
http-01 challenge for
Cleaning up challenges
Some challenges have failed.


  • The following errors were reported by the server:

    Type: dns
    Detail: DNS problem: SERVFAIL looking up CAA for - the domain's nameservers may be
    My web server is (include version):
    Not a web server i wanted certificate for Pterodactyl Node (Wings)
    The operating system my web server runs on is (include version):
    Ubuntu 18.04
    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 1.9.0


Looks like it's a DNSSEC issue:

You could try creating a CAA record in your DNS to avoid your nameservers sending the bogus response ... but I think it's probably best to ask Arvan about it, so that they can fix your zone for you.


This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.