Difference in SOA record between master and slave?
Richard Stevenson
RichardS at webmasters.co.nz
Fri Feb 25 00:10:37 UTC 2000
Hi
I've discovered an interesting trick, which I am finding somewhat annoying.
I've set up a couple of nameservers to serve 64.20.202.in-addr.arpa, and
I'd like to have that zone delegated to them. Unfortunately, APNIC refuses
to accept the delegation because the two servers give different answers to
a query for the SOA record. From the intended master, I get this (note
the TTL on the SOA record):
> [richards at bones richards]$ dig @ns1.akl.adv.net.nz 64.20.202.in-addr.arpa
in
> soa
>
> ; <<>> DiG 8.2 <<>> @ns1.akl.adv.net.nz 64.20.202.in-addr.arpa in soa
> ; (1 server found)
> ;; res options: init recurs defnam dnsrch
> ;; got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
;;
> QUERY SECTION: ;; 64.20.202.in-addr.arpa, type = SOA, class = IN
>
> ;; ANSWER SECTION:
> 64.20.202.in-addr.arpa. 2D IN SOA adv.net.nz. soa.adv.net.nz. (
> 2000021800 ; serial
> 4d4h ; refresh
> 1H ; retry
> 5w6d16h ; expiry
> 4d4h ) ; minimum
>
>
> ;; AUTHORITY SECTION:
> 64.20.202.in-addr.arpa. 2D IN NS ns1.akl.adv.net.nz.
> 64.20.202.in-addr.arpa. 2D IN NS ns2.akl.adv.net.nz.
> 64.20.202.in-addr.arpa. 2D IN NS ns1.wlg.adv.net.nz.
> 64.20.202.in-addr.arpa. 2D IN NS ns2.wlg.adv.net.nz.
>
> ;; ADDITIONAL SECTION:
> ns1.akl.adv.net.nz. 2D IN A 202.20.64.19
> ns2.akl.adv.net.nz. 2D IN A 202.20.64.18
> ns1.wlg.adv.net.nz. 1H IN A 202.49.144.2
> ns2.wlg.adv.net.nz. 1H IN A 202.49.144.3
>
> ;; Total query time: 1 msec
> ;; FROM: bones.akl.adv.net.nz to SERVER: ns1.akl.adv.net.nz 202.20.64.19
;;
> WHEN: Fri Feb 25 12:52:43 2000 ;; MSG SIZE sent: 40 rcvd: 234
But I get this one from the slave (again, note the TTL of the SOA record):
> [richards at bones richards]$ dig @ns2.akl.adv.net.nz 64.20.202.in-addr.arpa
in
> soa
>
> ; <<>> DiG 8.2 <<>> @ns2.akl.adv.net.nz 64.20.202.in-addr.arpa in soa
> ; (1 server found)
> ;; res options: init recurs defnam dnsrch
> ;; got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
;;
> QUERY SECTION: ;; 64.20.202.in-addr.arpa, type = SOA, class = IN
>
> ;; ANSWER SECTION:
> 64.20.202.in-addr.arpa. 4d4h IN SOA adv.net.nz. soa.adv.net.nz. (
> 2000021800 ; serial
> 4d4h ; refresh
> 1H ; retry
> 5w6d16h ; expiry
> 4d4h ) ; minimum
>
>
> ;; AUTHORITY SECTION:
> 64.20.202.in-addr.arpa. 2D IN NS ns1.akl.adv.net.nz.
> 64.20.202.in-addr.arpa. 2D IN NS ns2.akl.adv.net.nz.
> 64.20.202.in-addr.arpa. 2D IN NS ns1.wlg.adv.net.nz.
> 64.20.202.in-addr.arpa. 2D IN NS ns2.wlg.adv.net.nz.
>
> ;; ADDITIONAL SECTION:
> ns1.akl.adv.net.nz. 2D IN A 202.20.64.19
> ns2.akl.adv.net.nz. 2D IN A 202.20.64.18
> ns1.wlg.adv.net.nz. 1H IN A 202.49.144.2
> ns2.wlg.adv.net.nz. 1H IN A 202.49.144.3
>
> ;; Total query time: 1 msec
> ;; FROM: bones.akl.adv.net.nz to SERVER: ns2.akl.adv.net.nz 202.20.64.18
;;
> WHEN: Fri Feb 25 12:54:16 2000 ;; MSG SIZE sent: 40 rcvd: 234
My initial thought was that the zone file wasn't being transferred
correctly, but that's not the case (I've pasted in both files below - from
the master and from the slave). It looks as if ns1.akl.adv.net.nz is
ignoring the TTL specified on the SOA record in favour of the minimum TTL
in the SOA record itself. Is this normal?
Regards
Richard
---------- Zone file from master ----------
$TTL 172800
@ IN SOA adv.net.nz. soa.adv.net.nz. (
2000021800 ; serial
360000 ; refresh
3600 ; retry
3600000 ; expire
360000 ; minimum
)
IN NS ns1.akl.adv.net.nz.
IN NS ns2.akl.adv.net.nz.
IN NS ns1.wlg.adv.net.nz.
IN NS ns2.wlg.adv.net.nz.
10 IN PTR scottie.akl.adv.net.nz.
17 IN PTR scottie.akl.adv.net.nz.
18 IN PTR spock.akl.adv.net.nz.
19 IN PTR bones.akl.adv.net.nz.
20 IN PTR sulu.akl.adv.net.nz.
---------- End master zone file ----------
---------- Zone file from slave ----------
; BIND version named 8.2.2-P3 Thu Nov 11 00:04:50 EST 1999
; BIND version root at porky.devel.redhat.com:/usr/src/bs/BUILD/bind-
8.2.2_P3/src/bin/named
; zone '64.20.202.in-addr.arpa' first transfer
; from 202.20.64.17:53 (local 202.20.64.18) using AXFR at Mon Feb 21
10:06:25 2000
$ORIGIN 20.202.in-addr.arpa.
64 172800 IN SOA adv.net.nz. soa.adv.net.nz. (
2000021800 360000 3600 3600000 360000 )
172800 IN NS ns1.akl.adv.net.nz.
172800 IN NS ns2.akl.adv.net.nz.
172800 IN NS ns1.wlg.adv.net.nz.
172800 IN NS ns2.wlg.adv.net.nz.
$ORIGIN 64.20.202.in-addr.arpa.
20 172800 IN PTR sulu.akl.adv.net.nz.
18 172800 IN PTR spock.akl.adv.net.nz.
10 172800 IN PTR scottie.akl.adv.net.nz.
19 172800 IN PTR bones.akl.adv.net.nz.
17 172800 IN PTR scottie.akl.adv.net.nz.
---------- End slave zone file ----------
------- End of forwarded message -------
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