BIND 8.2.2_P5 gives up

Mark.Andrews at nominum.com Mark.Andrews at nominum.com
Tue Sep 26 21:47:06 UTC 2000


	BIND 4 & 8 do not have query restart.  They depend on the client
	requerying which is required behaviour for UDP clients.

	As for why named rejects the A records.  This is anti-cache
	poisoning at work.

	Mark
> 
> (For those of you that missed the first installment, I've got a BIND
> 8.2.2_P5 that's performing about half of a lookup for a client, and then
> just stops.  See the packet trace below for more detail.)
> 
> Okay.  Here it all is again, with a new query:
> 
>  1   0.00000 client -> server DNS C www.acmebw.com. Internet Addr ?
>  2   0.01793 server -> a.gtld DNS C www.acmebw.com. Internet Addr ?
>  3   0.03831 a.gtld -> server DNS R 
>  4   0.06703 server -> j.gtld DNS C NS1.VIENNA.ACMEBW.NET. Internet Addr ?
>  5   0.08790 server -> j.gtld DNS C NS1.SANJOSE.ACMEBW.NET. Internet Addr ?
>  6   2.06669 j.gtld -> server DNS R NS1.VIENNA.ACMEBW.NET. Internet Addr 198.
> 41.3.72
>  7   2.07422 j.gtld -> server DNS R NS1.SANJOSE.ACMEBW.NET. Internet Addr 208
> .206.240.74
>  8   4.99171 client -> server DNS C www.acmebw.com.windwire.com. Internet Add
> r ?
>  9   4.99361 server -> client DNS R  Error: 3(Name Error)
> 10  15.98684 client -> server DNS C www.acmebw.com. Internet Addr ?
> 11  15.99119 server -> vienna DNS C www.acmebw.com. Internet Addr ?
12  16.01393 vienna -> server DNS R www.acmebw.com. Internet CNAME acmebw.com.
> 13  16.02479 server -> client DNS R www.acmebw.com. Internet CNAME acmebw.com
> .
> 
> The reason that it's requesting the nameservers it has already recieved
> in additional data is:
> 
> rrextract: dname NS1.VIENNA.ACMEBW.NET type 1 class 1 ttl 172800
> ignoring additional info 'NS1.VIENNA.ACMEBW.NET' type A
> rrextract: dname NS1.SANJOSE.ACMEBW.NET type 1 class 1 ttl 172800
> ignoring additional info 'NS1.SANJOSE.ACMEBW.NET' type A
> 
> That's from the BIND debug output.  The rest of the debug output seems
> to lend no additional information.  It only seems to show the same thing
> that the packet snoop does, which is that it gets the appropriate name
> servers and then fails to respond to the original request.
> 
> BTW, the final CNAME responses contain the appropriate A record.
> 
> Again, thanks for any help you might be able to lend.
> 
> -Bitt
> 
> 
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com



More information about the bind-users mailing list