Fwd: .info root servers responding in authority section, not answer section?
Richard Johnsson
johnsson at hamilton.com
Sat Oct 20 04:37:51 UTC 2001
>
> On Fri, 19 Oct 2001, R. Scott Perry wrote:
>
<snip>
> > >Are both types of responses correct? Why the inconsistency? I checked a
> > >few RFCs (1034/1035/2181) and wasn't able to figure out what section
covers
> > >this.
>
> This answer is correct. From RFC 1034, section 4.3.2, bullet 3:
>
> b. If a match would take us out of the authoritative data,
> we have a referral. This happens when we encounter a
> node with NS RRs marking cuts along the bottom of a
> zone.
>
> Copy the NS RRs for the subzone into the authority
> section of the reply. Put whatever addresses are
> available into the additional section, using glue RRs
> if the addresses are not available from authoritative
> data or the cache. Go to step 4.
>
> The server running on these machines is correctly returning a referral.
> Note also that BIND 9 has the same behavior. BIND 8 returns NS records in
> the answer section, which is incorrect behavior.
>
> Brian
Regardless of which behavior is correct, my BIND 9.2.0rc7 gives SERVFAIL
when asked for NS records of declude.info. To me that says there's a bug in
BIND 9.2.0rc7 or the Nominum TLD servers or the declude.info data.
napa 36 #dig txt chaos version.bind
; <<>> DiG 9.2.0rc7 <<>> txt chaos version.bind
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13781
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;version.bind. CH TXT
;; ANSWER SECTION:
version.bind. 0 CH TXT "9.2.0rc7"
;; Query time: 5 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri Oct 19 20:49:29 2001
;; MSG SIZE rcvd: 51
napa 37 #dig ns declude.info
; <<>> DiG 9.2.0rc7 <<>> ns declude.info
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 34440
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;declude.info. IN NS
;; Query time: 75 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri Oct 19 20:49:37 2001
;; MSG SIZE rcvd: 30
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