<div dir="ltr">Yeah, Thanks for the response, I got it clear <br><br><span lang="en-US"><font color="black" face="Tahoma" size="2"><span style="font-size:10pt;" dir="ltr">Appendix B Details on specific design and implementation choices.<br>
<br>
<br>
B.1. Returning the root delegation when no answer can be found<br>
<br>
From RFC1034/1035 it is not obvious if returning a root delegation<br>
is a (non-)requirement for authoritative servers.<br>
<br>
We have decided not to implement a root-hints since an<br>
authoritative server should in normal circumstances only receive<br>
queries for which the server is authoritative.<br>
<br>
Also see RFC 1123 section 6.1.2.5.<br>
<br>
Whenever an answer cannot been provided we return a SERVFAIL. It<br>
has been argued that this is a policy decision and thus a REFUSE<br>
should be returned. However, in the spirit of RFC1034/1035 a server<br>
should return cached data, if that cache cannot be reached a SERVFAIL<br>
is an appropriate response.<br>
<br>
Also see the discussion on the 'namedroppers list' Starting April<br>
2002 with subject "name server without root cache "<br>
(<a href="ftp://ops.ietf.org/pub/lists/">ftp://ops.ietf.org/pub/lists/</a>)<br><br>./arun<br></span></font></span><br><br><br><div class="gmail_quote">On Tue, Jul 19, 2011 at 11:33 AM, Jaap Akkerhuis <span dir="ltr"><<a href="mailto:jaap@nlnetlabs.nl">jaap@nlnetlabs.nl</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div></div><div class="h5"><br>
On Sun, Jul 17, 2011 at 10:34:56AM +0300,<br>
Arun N S <<a href="mailto:ns.arunns@gmail.com">ns.arunns@gmail.com</a>> wrote<br>
a message of 55 lines which said:<br>
<br>
> I was wondering why NSD returns SERVFAIL for recursive queries,<br>
> normally it is REFUSED ?<br>
<br>
AFAIK, no RFC explicitely says what a name server should return when<br>
it does not accept out-of-zone queries.<br>
<br>
</div></div>It is discussed somewhat in the document "differences.tex" (differences<br>
between bind & nsd) and the RQUIREMENTS document (Appendix B.1).<br>
<br>
jaap<br>
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</blockquote></div><br><br clear="all"><br>--<br>
</div>