[dns-operations] Minimalistic DNS server for SOA and AXFR

Mark Andrews marka at isc.org
Tue Jul 17 13:33:39 UTC 2012

In message <50056395.2030709 at ripe.net>, Anand Buddhdev writes:
> Thanks to all who responded, both publicly and privately.
> I had forgotten to mention that the clients will be under my control,
> and I don't plan on using TSIG, so I'm not going to bother implementing it.
> I'm also not going to bother with the NOTIMP responses, and just return
> REFUSED for queries I don't support.
> About responding to SOA queries over TCP: BIND doesn't do that (it uses
> UDP to query for the SOA record) and neither does NSD (it always asks
> for AXFR/IXFR, and looks at the SOA record in there, abandoning the
> connection if it doesn't need the XFR). So I can get away with
> implementing just AXFR over TCP, and nothing else (including returning
> AXFR in response to IXFR).
> Regards,
> Anand

Actually named does do SOA queries over TCP before AXFR.
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org

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