DNS resolution for internet stopped

Question

2 weeks ago my DNS was able to resolve queries to internet normally and suddenly.

I have all Root Hints
I don't use forwarding

But due to the problem of stopping navigation on the websites, if I add 1.1.1.1 in the routing, the accesses to the websites are normalized.

Answer 1

Please run;

Dcdiag /v /c /d /e /s:%computername% >c:\dcdiag.log
repadmin /showrepl >C:\repl.txt
ipconfig /all > C:\dc1.txt
ipconfig /all > C:\problemworkstation.txt
tracert 8.8.8.8>C:\trace.txt

then put unzipped text files up on OneDrive and share a link.

Answer 2

@joaomanoelc Hi,

Thank you for posting in Q&A!

May I ask what specific error message occurred when your own DNS server fail to access interent? It will help us to provide more specific technical suggestions.

Is the DNS server you used a DC? If it is a DC, you can first try to use Dcdiag to check the health of it. It will help to narrow down the issue.
If you running the modern Windows Server 2019/2016/2012R2 versions and have AD DS and RSAT roles installed, then you already have Dcdiag installed. For more details, please refer to:
https://www.webservertalk.com/domain-controller-health-check

Hope you have a nice day!
Gloria

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Answer 3

@joaomanoelc Hi,

Thank you for posting in Q&A!

According to my research, event ID 5504 is logged when a DNS Server receives a packet containing an invalid domain name. There are many possible causes.

1. The DNS cache becomes corrupt with invalid domain names.
2. The DNS Server receives a spoofed response.
3. The DNS response contains domain names with characters other than 0-9, a-z, A-Z, . (Period), and - (Hyphen).
4. The DNS Server has been configured with invalid forwarders
5. The network the DNS server resides on is busy or not working properly.

I find that 192.33.4.12 is a name server which has the name "c.root-servers.net". Since you mentioned "I don't use forwarding" Do you configure 192.33.4.12 as your DNS server directly?

Hope you have a nice day!
Gloria

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