SSL problem with Let's Encrypt

[euroG]

Hi,
we have a dedicated server on which we have created a domain that does NOT have the nameservers of our server but points to it only by changing the A record. Webroot is empty.
We can't create the free certificate because it returns the error

acme: error: 403 :: urn:ietfarams:acme:error:unauthorized :: 2a00:6d40:4:1::c266:6: Invalid response from https://www.domain.com/.well-known/acme-challenge/tT6_B1lj-e08nTDnyAvUtrzQ-qRv1CdTtZ8Lw4XsfVo: 404

Is the problem because it doesn't use our server nameservers?
Thanks.

 

[zEitEr]

Hello,

Is the problem because it doesn't use our server nameservers?

No, it is not. Probably related to either a missing or wrong IPv6 in a webserver settings or blocks by CloudFlare (if it's used for proxying traffic to your site).

 

[euroG]

Hello,



No, it is not. Probably related to either a missing or wrong IPv6 in a webserver settings or blocks by CloudFlare (if it's used for proxying traffic to your site).

Thanks zEitEr.
Server haven't IPV6 and domain doesn't use CloudFlare.
We also tried putting down the server firewall but we still get the same error: Error 404

 

[zEitEr]

We also tried putting down the server firewall but we still get the same error: Error 404

Server firewall is not responsible for HTTP/404 error. Do you have other domains on the server with working certificates from Letsencrypt?

 

[euroG]

Server firewall is not responsible for HTTP/404 error. Do you have other domains on the server with working certificates from Letsencrypt?

yes, many domains

 

[zEitEr]

I could check what might be wrong if you send me a domain name in PM

 

[euroG]

I could check what might be wrong if you send me a domain name in PM

submitted!

 

[zEitEr]

The domain resolves both to IPv4 and IPv6. Letsencrypt uses IPv6 which is not hosted on your server. That's the possible reason of the issue. You need to either update DNS records and remove IPv6 or add the IPv6 to the server.