When this would happen ?

Mark_Andrews at isc.org Mark_Andrews at isc.org
Tue Dec 10 05:04:15 UTC 2002


> 
> Dear Sir :
> 
>         The following data is what confuses me!!
> 
> ; <<>> DiG 8.3 <<>> @dns.hinet.net www.istudy.com.tw.
> ; (1 server found)
> ;; res options: init recurs defnam dnsrch
> ;; got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
>             ^^^^^^^^
> ;; QUERY SECTION:
> ;;      www.istudy.com.tw, type = A, class = IN
> 
> ;; ANSWER SECTION:
> www.istudy.com.tw.      1D IN A         61.222.96.52
>                                         ^^^^
> 
> ;; AUTHORITY SECTION:
> istudy.com.tw.          1D IN NS        www.istudy.com.tw.
> istudy.com.tw.          1D IN NS        istudy.com.tw.
> 
> ;; ADDITIONAL SECTION:
> www.istudy.com.tw.      1D IN A         61.222.96.52
> istudy.com.tw.          1D IN A         61.222.96.52
> 
> 
> why does A record of www.istudy.com.tw always have 1D TTL ?
> why doesn't it countdown sec by sec ?
> ps: The name server I queried is not authoritive for this domain 
> 
> Best Regard,
> Scottie
> 
> 2002/12/10

	dns.hinet.net is a stealth server for com.tw.

	Mark

; <<>> DiG 8.3 <<>> soa +norec com.tw @dns.hinet.net 
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41971
;; flags: qr aa ra; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 6
;; QUERY SECTION:
;;	com.tw, type = SOA, class = IN

;; ANSWER SECTION:
com.tw.			1D IN SOA	a.twnic.net.tw. snw.twnic.net.tw. (
					1999081444	; serial
					1H		; refresh
					15M		; retry
					1W		; expiry
					1D )		; minimum


;; AUTHORITY SECTION:
com.tw.			6D IN NS	a.twnic.net.tw.
com.tw.			6D IN NS	b.twnic.net.tw.
com.tw.			6D IN NS	c.twnic.net.tw.
com.tw.			6D IN NS	d.twnic.net.tw.
com.tw.			6D IN NS	ns2.cuhk.edu.hk.

;; ADDITIONAL SECTION:
a.twnic.net.tw.		20h55m IN A	140.111.1.2
a.twnic.net.tw.		20h55m IN A	163.28.1.2
b.twnic.net.tw.		20h55m IN A	192.72.81.200
c.twnic.net.tw.		20h55m IN A	168.95.192.10
d.twnic.net.tw.		20h55m IN A	210.17.9.229
ns2.cuhk.edu.hk.	1d5h17m7s IN A	137.189.6.21

;; Total query time: 912 msec
;; FROM: drugs.dv.isc.org to SERVER: dns.hinet.net  168.95.1.1
;; WHEN: Tue Dec 10 16:01:23 2002
;; MSG SIZE  sent: 24  rcvd: 263

--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org


More information about the bind-users mailing list