I Used to have a DNS Problem. 1

[Chopsy666]

Hi,

I know its a bit odd asking for help after ive solved the problem, but i dont know how or why.

I've been having problems with one of our DNS servers. It would do resolution fine for most things, browsing the internet, our domain.

But there were several sites that wouldnt work.

all of them ending example.uk for instance

http://hi.random.example.uk

or

https://another.way.of.example.uk

Now the forwarders were same on both DNS servers (working and bad). In the end i removed the DNS role from the secondary (bad) server, and recreated it, re-booted between each step just incase. But still no luck. Then i tried a ping/tracert from the DNS server it self. It just timed out, but didnt bother me as i was having same ping/tracert results with the good server. Then i ran an NSlookup on one of the example.com sites. and it resolved it o.k. (on the good server, but also the bad) I had not tried nslookup from the secondary (bad) server previously.

All of a sudden the clients can now connect to all of the example.uk sites...any suggestions on what might have caused this? corrupt cache etc??? This will help me be more proactive to any future problems.

Thanks

 

[ShackDaddy]

I think that maybe even though you had uninstalled and reinstalled the DNS service, the cache didn't get cleared. but once you'd been querying on the rebuilt service and the cache finally expired those records, you were golden.

All I can think of is that maybe you had a bad root-hints or something. It would have been great to actually get the nslookup information from what a query looked like when things were bad.

ShackDaddy