BIND 8.2.2_P5 gives up
Mark.Andrews at nominum.com
Mark.Andrews at nominum.com
Wed Sep 27 00:25:43 UTC 2000
>
> Mark.Andrews at nominum.com wrote:
> >
> > 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.
>
> I recognized the anti-cache-poisoning behavior, actually. I guess I
> just didn't realize that that was on by default these days. Cool.
>
> Query restart is a new one on me. I've never encountered this problem
> before and I think that I would have. I've certainly been running BIND
> 4&8 for a while. On the other hand, I'm not a BIND guru.
>
> As I understand it, after some research, not doing query restart means
> that when a lookup is performed and glue has to be looked up manually
> (for whatever reason), BIND simply drops the initial query on the floor
> and requires that the client ask again. Is that correct?
Yes.
> If so, it seems wrong(TM).
I agree.
> Is there any reasoning for this?
It was difficult to fix.
> The only reason that I can see is that it would take a long time.
Time was not a issue. It required a major re-write of certian
sections to implement.
> But it's going to take a long time anyway, right? What am I missing?
>
> Also, I can understand the part about requerying, but in my case, and I
> would assume most people's cases, the next appropriate thing to look up
> is the name appended with the local domain (or whatever's in resolv.conf
> or equivalent). And this is almost always going to fail. Certainly, I
> don't have a host ``www.acmebw.com.windwire.com''. And in the off
> chance that it might exist, it's probably not going to be what I was
> looking for.
No. Resolvers usually ask the same question multiple times of all
the servers listed in resolve.conf before trying the next name in
the search list.
>
> And does "BIND 4 & 8 do not have query restart" mean that BIND 9 does?
Yes.
>
> -Bitt
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews at nominum.com
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