Re: [LUG] intermittant resolver issues

["David Brook" <David.Brook@xxxxxxxxxxxxxx>]

Thanks for reply Simon - no specific domains cause problems could be BT (our 
ISP), could be steam-experience (our business), could be Google, could be 
anything --  totally unpredictable.

One weird one - particular web site failed to find under www .xxx but then 
researched itself again under www1 .xxx and worked!!!

I am totally baffled!!

We do have forwarders listed in our DNS config file pointing at the BT DNS 
servers. I thought this was the only way to chain DNS queries from our 
domain to the outside world. It has always worked in the past!!!! .

Will forward our config files if this would help anyone to help us!!.

cheers

David

ps why 'EVIL' forwarding??
----- Original Message ----- 
From: "Simon Waters" <simon@xxxxxxxxxxxxxx>
To: <list@xxxxxxxxxxxxx>
Sent: Friday, April 21, 2006 11:12 AM
Subject: Re: [LUG] intermittant resolver issues


> David Brook wrote:
> > intermittent - as far as I was aware, a DNS works or doesn't.
>
> Not if the results returned from the authoritative DNS servers for the
> domain are inconsistent. Then it will work sometimes and not others.
>
> What domains are you experiencing the problem with?
>
> Is the DNS server using the root name servers or using something evil
> like forwarding?
>
> Simon, wondering realising the email from the server at work he was
> looking for probably got greylisted.
>
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