question

joaomanoelc avatar image
joaomanoelc asked ·

DNS resolution for internet stopped

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.

windows-dhcp-dns
10 |1000 characters needed characters left characters exceeded

Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total.

DSPatrick avatar image
DSPatrick answered ·

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.



4 comments Share
10 |1000 characters needed characters left characters exceeded

Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total.

GloriaGu-MSFT avatar image
GloriaGu-MSFT answered ·

@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

============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.



1 comment Share
10 |1000 characters needed characters left characters exceeded

Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total.


When trying to access bing.com this event is generated in the event viewer


It tries to access and expires the attempt

Event ID 5504
The DNS server encountered an invalid domain name in a packet from 192.33.4.12. The packet will be rejected. The event data contains the DNS packet.

0 Votes 0 · ·
GloriaGu-MSFT avatar image
GloriaGu-MSFT answered ·

@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

============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.


6 comments Share
10 |1000 characters needed characters left characters exceeded

Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total.

Hi
Thanks for answering!

My DNS is with the basic configurations, because I did not use any other DNS in the forwarding and everything worked normally until about 2 weeks.

This server did not have any system updates and even if I applied all updates, the behavior of the accesses did not change.

I reinstalled the DNS function and also did not change the status.

0 Votes 0 · ·

Still awaiting files


0 Votes 0 · ·