Domain Name System Status "defekt" Broken

Networking
1

Dear Community,

i have Vodafone Internet.
Yesterday i recevied the new Modem because i changed my contract from 500Mbit to 1000Mbit.
The old modem was running in Bridge Mode.

I changed the Modem and then i changed again in the Interface of Vodafone the Mode to Bridge.

Now my IP-Fire gets the Public IP (its working)

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But i dont have any DNS resolve or DNS, therefore internet is not working.

In the Domain Name System i get the Status broken.
[https://s20.directupload.net/images/210623/jqnq5b2i.png]

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(https://s20.directupload.net/images/210623/jqnq5b2i.png)

I connected my Notebook directly to the Vodafone Modem (Bridge Mode).
Internet works and also i get the DNS from Vodafone.
→ Its not a Problem of the Modem oder Vodafone.

IP-Fire:

  • I made some restarts
  • chaned to manual DNS
  • changed to Standard DNS of provider
  • TCP / UDP
    Nothing is working.

I attached some Screenshots. I hope someone can help me.

Thanks!

2

Which errors are displayed if you hover over the ‘Fehler’ word?
Did you try without ISP DNS, but with 8.8.8.8 enabled?

3

Thanks for the fast answer.
Attached the Pictures, its a timeout for both settings.

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4

I’ve just tested your case. ( It lasts, if you first have to disable 10 servers. :wink: )
If I allow the DNS servers of the ISP ( Vodafone/Unitymedia Cable Internet ) the status is ‘broken’ (sometimes), ‘ok’ otherwise.

5

Thanks for the Info.
So what steps you recommend?
Or should I make a fresh ipfire installation?

:blush:

6

I recommend not to use ISP’s DNS servers, but to use some trusted servers listed in the wiki.
Google and cloudflare I use only for backup.

7

I have still the same issue.
When I use a non ISP DNS I get still no internet connection and Domain Name is broken.

Any other ideas?

8

Ok now it works.
The only thing what i did, i restartet again the Modem of Vodafone.
Parallel i deactived the DNS from the ISP and added some more.
After restart of IP-Fire it worked.

I dont know why!?!?!

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9

Yes, that makes sense.
I forgot the modem reset. DOCSIS modems or the CMTS often bind the end point MAC address to the connection. This is released by a reboot for example.

EDIT: Just one more thought about this problem.
‘Broken’ means there is some problem with the nameserver chosen by unbound. So this state may change intermittend to ‘ok’, if a functioning DNS server is chosen.
Hope this is right. Could not really reproduce this error, because I specify ‘nice’ servers.

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