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<DIV style="TEXT-INDENT: 2em">I found that bind9.9.2 recursor returns
servfail to soa requests when receiving inproper nodata notification that
there is just a root SOA RR in the authority section in response from
authoritative namservers.</DIV>
<DIV style="TEXT-INDENT: 2em">Just like this as following. Why does
it forward the inproper response to clients?</DIV>
<DIV style="TEXT-INDENT: 2em"> </DIV>
<DIV style="TEXT-INDENT: 2em"> </DIV>
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<DIV style="FONT-STYLE: italic"> [root@localhost secman]# dig
soft.vipbiz.cn ns @localhost</DIV>
<DIV style="FONT-STYLE: italic"> </DIV>
<DIV style="FONT-STYLE: italic; TEXT-INDENT: 2em">; <<>> DiG
9.9.2-P2 <<>> soft.vipbiz.cn ns @localhost<BR>;; global
options: +cmd<BR>;; Got answer:<BR>;; ->>HEADER<<- opcode:
QUERY, status: SERVFAIL, id: 21576<BR>;; flags: qr rd ra; QUERY: 1,
ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1</DIV>
<DIV style="FONT-STYLE: italic"> </DIV>
<DIV style="FONT-STYLE: italic; TEXT-INDENT: 2em">;; OPT
PSEUDOSECTION:<BR>; EDNS: version: 0, flags:; udp: 4096<BR>;; QUESTION
SECTION:<BR>;soft.vipbiz.cn.
IN NS</DIV>
<DIV style="FONT-STYLE: italic"> </DIV>
<DIV style="FONT-STYLE: italic; TEXT-INDENT: 2em">;; Query time: 91
msec<BR>;; SERVER: 127.0.0.1#53(127.0.0.1)<BR>;; WHEN: Fri May 10
23:08:56 2013<BR>;; MSG SIZE rcvd:
43<BR></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE>
<DIV> </DIV>
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<DIV><SPAN>Liu Mingxing</SPAN></DIV></BODY></HTML>