Challenge did not pass: Connection refused

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My domain is:

I ran this command:
I request certificate from Webmin Configuration > Let’s Encryp > Request Certificate

It produced this output: challenge did not pass: Fetching Connection refused

My web server is (include version):
Webmin version 1.900

The operating system my web server runs on is (include version):
Webmin version 1.900

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 can login to the Webmin admin with root and alternate root

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):

This shows me that port 80 is not responding to LE requests.
[perhaps blocked by the ISP or firewall]

Which I can confirm from my own system:

--2019-02-13 02:44:35--
Resolving (
Connecting to (||:80... failed: Connection timed out.

To make things worse, even port 443 is unresponsive/blocked.

Now I'm thinking Geo-Location blocking is in enabled.

You would have to allow at least port 80 access to validate the cert.
OR use something like DNS validation.
[if this is a very restricted system]

Hi rg305

I tried with DNS Validation but receive below error. Can you help?

Requesting a new certificate for, using DNS validation …

… request failed : Neither DNS zone or any of its sub-domains exist on this system

DNS validation would require a TXT record be created in the Internet zone for the FQDN as:

The authoritative DNS server is at IP
nslookup -q=ns internet address = internet address =

Unfortunately I’m not familiar with how to instruct Webmin to handle DNS authentication.

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