zone transfer problem (newbie issue)
Mark Andrews
Mark_Andrews at isc.org
Sat May 14 13:28:56 UTC 2005
> At 10:12 PM -0400 2005-05-13, mayer wrote:
>
> > No Brad, BIND 8 and BIND 9 interoperate and handle AXFR zone transfers
> > just fine.
>
> If that were true, then the ISC BIND FAQ wouldn't have an entry
> for "Zone transfers from my BIND 9 master", and there wouldn't be an
> option for "transfer-format one-answer;".
>
> > It's IXFR where there may be issues. AXFR format hasn't
> > changed since RFC 1034 was issued.
>
> IXFR doesn't work correctly outside of BIND-9, that's true.
> However, there can also be some issues with correctly interpreting
> the AXFR from a BIND-9 server.
>
> --
> Brad Knowles, <brad at stop.mail-abuse.org>
>
> "Those who would give up essential Liberty, to purchase a little
> temporary Safety, deserve neither Liberty nor Safety."
>
> -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
> Assembly to the Governor, November 11, 1755
>
> SAGE member since 1995. See <http://www.sage.org/> for more info.
BIND 4.9.6 and later accept many-answer responses.
From BIND 4 CHANGES.
779. [bug] named-xfer can now handle RFC1035-compliant zone transfers.
BIND 4 only ever generated one-answer AXFR streams.
BIND 8 has always accepted many-answer and by default produces
one-answer AXFR streams.
BIND 9 has always accepted many-answer and by default produces
many-answers AXFR streams.
Certain older versions of Microsoft's nameserver use a 16k
buffer (rather than a 64 buffer) and as a result can't
accept a many-answer AXFR stream that uses full sized
transmit buffers. To interoperate with these versions you
transmit one-answer stream which work for all but the most
exceptional zones.
Mark
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews at isc.org
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