Help! , The DNS problem

[aFard]

My domain is: iamafard.ir

I ran this command: certbot certonly --standalone --preferred-challenges http -d fed.iamafard.ir

It produced this output:

The operating system my web server runs on is Ubuntu 22.04

My hosting provider, if applicable, is: parspack.com

I can login to a root shell on my machine

I'm using webmin control panel

The version of my client is certbot 2.9.0

[rg305]

Hi @aFard, and welcome to the LE community forum

The base domain resolves to an IP, but the fed subdomain does not.
In order to obtain a cert from an trusted CA, you must prove control of that name.
HTTP-01 authentication requires access to your site over the Internet.
The Internet can't reach such a name.

How is anyone going to reach your site?

[Bruce5051]

@aFard as @rg305 said there is no DNS Record for fed

$ nslookup fed.iamafard.ir elmo.ns.cloudflare.com.
Server:         elmo.ns.cloudflare.com.
Address:        172.64.33.163#53

** server can't find fed.iamafard.ir: NXDOMAIN

But without fed there is this.

$ nslookup iamafard.ir elmo.ns.cloudflare.com.
Server:         elmo.ns.cloudflare.com.
Address:        108.162.193.163#53

Name:   iamafard.ir
Address: 104.21.38.25
Name:   iamafard.ir
Address: 172.67.218.11
Name:   iamafard.ir
Address: 2606:4700:3035::ac43:da0b
Name:   iamafard.ir
Address: 2606:4700:3031::6815:2619