How not to set up your DNS (part 9)

March 17, 2006

Presented in the now-traditional illustrated form:

; sdig ns gcluk.net
ns1.gcluk.net.
ns2.gcluk.net.
; dig mx web1.gcluk.net @ns1.gcluk.net
[...]
;; ANSWER SECTION:
web1.gcluk.net. IN A 65.98.36.90
;; AUTHORITY SECTION:
web1.gcluk.net. IN NS .

(TTLs have been omitted for clarity.)

That's an interesting authority record they're returning; somewhat more like a disclaimer of authority record, in fact.

The effects are closely related to what I saw in HowNotToDoDNSVII. In this case, we first looked up the A record and found one, but when we tried to look for an MX record the completely bogus NS record stymied our attempts. (Among other problems, there is no A record for the '.', the DNS root.)

Written on 17 March 2006.
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Last modified: Fri Mar 17 19:06:20 2006
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