NXDOMAIN issue

Website, Application, Performance DNS & Network
1

We’re having an issue (this began at some point Friday) with the following sites being inaccessible by some DNS servers:

  • DiscoverWeyburn
  • DiscoverHumboldt
  • WestCentralOnline

The DNS servers that are unable to access these 3 websites are as follows:

142.165.21.5
142.165.200.5

Error Code:

DNS_PROBE_FINISHED_NXDOMAIN

Please advise so we know what (if anything) needs to be done on our end in order to fix.

Thank you in advance.

2

It might be this:

For additional checks, dnschecker.org is handy

3

I presume this means Cloudflare has already implemented a solution for this issue and there is nothing that needs to be done on my end. Please confirm.

4

Correct - should be resolved already by the incident that @sdayman mentioned. If you are still seeing any issues, output from a failing location with these commands is useful:

dig example.com
dig example.com @1.1.1.1
dig example.com @8.8.8.8
curl example.com/cdn-cgi/trace
traceroute simon.ns.cloudflare.com

Replace example.com with the hostname you are seeing issues with.

2 Likes
5

Hello:

Have Cloudflare name servers changed?

Previously Cloudflare name servers were as follows:

NS1: sean.ns.cloudflare.com
NS2: val.ns.cloudflare.com

Please let me know if any changes need to be made. Thank you in advance.

6

Those are yours, each account has a pair assigned randomly. Simon used his name, but everyone equals the other for those tests. Do not alter anything in the registrar.

You can use matteo.ns.cloudflare, works the same for the tests :slight_smile:

2 Likes
7

Ok great thanks.

8

Yes - sorry for the confusion - I chose that because I can remember my own name… just about :laughing:

For the purpose of what I am trying to test (which location you reach for your DNS) checking any nameserver is good enough.

2 Likes
9

dig example.com
dig example.com @1.1.1.1
dig example.com @8.8.8.8
curl example.com/cdn-cgi/trace
traceroute sean.ns.Cloudflare

Replace example.com with the hostname you are seeing issues with.

In my case I would use sean.ns.cloudflare.com as it is one of the name servers on my account.

Have an awesome day!!!

1 Like
10

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