Primary DNS failing

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Level 1

Last few days, was finding that many sites couldn't be accessed, with browser just saying "Resolving Host..." for a long time. It only worked on sites I'd visited very recently. Even trying to get to tpg.com.au

I think the primary DNS is failing for some reason.

 

E.g. running this command at cmd prompt (.35 is primary DNS)

>nslookup tpg.com.au 203.12.160.35

failed with:

*** dns1.tpgi.com.au can't find tpg.com.au: Query refused

 

But this one (.36 being secondary DNS):

>nslookup tpg.com.au 203.12.160.36

succeeded with:

Non-authoritative answer:
Name: tpg.com.au
Address: 203.26.27.38

 

The Primary / secondary config (.35/.36 respectively) is just how the router was configured. Since it cam from TPG, I assume that's their settings.

I resolved it by switching the primary/secondary around in router settings. Seems to work better now.

1 REPLY 1
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Moderator

Hi @blueblue ,

 

Thanks for sharing this information, we're glad that the issue was fixed by switching the primary/secondary around. In the event that you'll experience the same issue you may also try to use public DNS/google for testing purposes and revert it back using TPG's DNS. 

 

Let us know should you require further assistance.

 

Cheers!