DNS_PROBE_FINISHED_NXDOMAIN on website after one year working

I have a domain. Pixelito.ir
I had set the domain to Cloudflare’s DNS and it was working normally for more than a year.
Since a 3 days ago, without making any changes in the codes or Cloudflare setting or server settings, the site is unavailable, and when I open the site in the browser, I encounter the following errors:

The Cloudflare Config Is :

Domain Whois :
Screenshot 1402-05-25 at 00.39.59

On the same server, I set another domain and the site is displayed easily. domain is config by Cloudflare.

What I have done so far:

1- I turned off the proxy
2- I turned on Under Attack Mode. In this case, the site was available for a few moments.
3- I made the security settings stronger.

But none of them were fruitful.
Does anyone have any ideas?

It looks like some DNS servers are having issues resolving it


How should I do this?
And how can this happen without changing anything?

You need to contact any DNS resolver that isn’t working correctly. It happened at the resolver level and had nothing to do with Cloudflare.


Right now, a.nic.ir, one of the root servers for the .ir top-level domain, is resolving your domain by itself rather than returning the delegation to your nameservers. It’s basically hijacking your domain and returning an incorrect (private) IP address.

% dig pixelito.ir @a.nic.ir

; <<>> DiG 9.10.6 <<>> pixelito.ir @a.nic.ir
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1123
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;pixelito.ir.                   IN      A

pixelito.ir.            418     IN      A

;; Query time: 207 msec
;; WHEN: Wed Aug 16 17:34:19 EDT 2023
;; MSG SIZE  rcvd: 45

The server a.nic.ir itself is unreachable from two of the four IP addresses I tried it from. But overall, it appears that a fraction (maybe 25%) of your lookups will return that private IP address, which is not what you want at all.

It may be deliberate on the part of whoever runs .ir but I have no way to know that.


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