No valid IP address found

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My domain

I ran this command:# certbot --apache -d -d (as root)

It produced this output:Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator apache, Installer apache
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for
http-01 challenge for
Enabled Apache rewrite module
Waiting for verification…
Cleaning up challenges
Failed authorization procedure. (http-01): urn:ietf:params:acme:error:dns :: No valid IP addresses found for


My web server is (include version):Apache/2.4.25 (Debian)

The operating system my web server runs on is (include version):debian 9

My hosting provider, if applicable,

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): 0.28.0

1 Like

Hi @rablampain

checking your domain you see: There is no valid ip address -

Host T IP-Address is auth. ∑ Queries ∑ Timeout A yes 1 0
AAAA yes A Singapore//Singapore (SG) - LINODE Hostname: yes 1 0
AAAA yes

Your www has one, your non-www not.

So you can't create a certificate using http validation with the non www domain name.

Add an A record with the same ip address of your www version. Then recheck the domain to see, if your non-www has an A-record.


Thank you for the fast reply.
How do I enter a “non-www”? Linode only accept “www” or “endoldpoliticsnow” (the domain name only). Is this correct for letsencrypt?

I don't know, that's provider-specific, I don't use Linode. May be the field is empty, may be "@" is used.

Share a screenshot of that menu.


Thanks again - will give it a try and post the result for others.


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