reject or drop AAAA queries

[Rock July]

Hi Alan,

Thanks for the help.

Regards,
Rock




________________________________
From: Alan Clegg <aclegg at isc.org>
To: bind-users at lists.isc.org
Sent: Fri, July 23, 2010 11:45:08 AM
Subject: Re: reject or drop AAAA queries

On 7/22/2010 8:42 PM, Rock July wrote:
> This is my current setup right now and the reason why I want to reject
> or drop the AAAA queries;
>  
> PC Clients: XP, Vista and 7 (Vista and 7 clients are sending both A and
> AAAA queries) send queries to DNS A.
> DNS A: will just forward the query to My DNS
> MyDNS: will query to DNS B in behalf of DNS A.
> DNS B: hosting the domain name (sample: xxx.test.com)
>  
> DNS B only hosting A record for xxx.test.com so when it receive AAAA
> query, it respond "no such name" or NXDOMAIN.
> This result causes negative caching on MyDNS and name resolution will
> also fail for other client computers.
> I only have control on MyDNS so I am thinking if there is any way that I
> can reject/drop those AAAA queries so it will not query to DNS B.

If the server at DNS B is responding with NXDOMAIN to a query for
XXX.TEST.COM AAAA when XXX.TEST.COM A exists, then you need to find
someone else to host TEST.COM as DNS B is broken.

AlanC


      
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