Directadmin custombuild 2.0 with nignx reversed proxy

My domain is:

I ran this command:
I use the directadmin gui with letsencrypt

It produced this output:
Cannot Execute Your Request


Getting challenge for from acme-server…
Waiting for domain verification…
Challenge is invalid. Details: Fetching Timeout. Exiti

My web server is (include version):
CentOS 7 with directadmin custombuild 2.0 and nginx reversed proxy

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

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): directadmin custombuild 2.0


You have IPv4 and IPv6 records for your domain

$ dig +short

$ dig aaaa +short

But your site is only reachable using IPv4

$ curl -IkL4
HTTP/1.1 404 Not Found
Server: nginx
Date: Fri, 29 Sep 2017 08:15:42 GMT
Content-Type: text/html; charset=iso-8859-1
Connection: keep-alive
Vary: Accept-Encoding

$ curl -IkL6
curl: (7) Failed to connect to port 80: Connection timed out

As Let's Encrypt prefers IPv6 over IPv4, it is trying to validate your domain using your IPv6 address and it receives a timeout.

Solution: Remove the AAAA record for your domain/domains or configure your site correctly to answer IPv6 requests.

Good luck,

Thanks! This helps me :slight_smile:

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