status: SERVFAIL for AAAA

Mark Andrews Mark_Andrews at isc.org
Tue Jul 26 00:46:35 UTC 2005


> status: SERVFAIL for AAAA
>  
> is it possible to configure BIND 9.2.3 server to return opcode: QUERY, status
> : NOERROR instead of SERVFAIL

	It normally does.  I would upgrade from BIND 9.2.3.  It's well
	past its "use by" date.
  
> Problem:
> it appears that sendmail servers attempt to resolve hosts via AAAA first, and
>  the return of a SERVFAIL causes the host to be 'unknown'.  
>  
> debian:~> dig mail.global.mxpath.net aaaa @ns4.mxpath.net
>  
> ; <<>> DiG 9.2.4 <<>> mail.global.mxpath.net aaaa @ns4.mxpath.net
> ;; global options:  printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 40019
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
>  
> ;; QUESTION SECTION:
> ;mail.global.mxpath.net.                IN      AAAA
>  
> ;; Query time: 39 msec
> ;; SERVER: 198.172.205.4#53(ns4.mxpath.net)
> ;; WHEN: Mon Jul 25 16:20:39 2005
> ;; MSG SIZE  rcvd: 40
>  
> debian:~>

	Try asking a non-recursive query of the parent server.
	What you have above is the parent server attempting to recurse
	and that recursion failing.

; <<>> DiG 8.3 <<>> mail.global.mxpath.net aaaa @ns4.mxpath.net +norec 
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19743
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2
;; QUERY SECTION:
;;	mail.global.mxpath.net, type = AAAA, class = IN

;; AUTHORITY SECTION:
global.mxpath.net.	1H IN NS	gns2.mxpath.net.
global.mxpath.net.	1H IN NS	gns1.mxpath.net.

;; ADDITIONAL SECTION:
gns1.mxpath.net.	1H IN A		66.185.167.68
gns2.mxpath.net.	1H IN A		130.94.106.69

;; Total query time: 162 msec
;; FROM: drugs.dv.isc.org to SERVER: 198.172.205.4
;; WHEN: Tue Jul 26 10:38:48 2005
;; MSG SIZE  sent: 40  rcvd: 110

>  <http://www.singlefin.net/> 	  <http://www.singlefin.net/> Managed Protectio
> n Services	
> 	
> 
> Karl Rink
> 	Singlefin
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--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org



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