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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