$ dig @sakura.matsusaka-u.ac.jp 75.244.192.in-addr.arpa. -t soa +norec ; <<>> DiG 9.3.5-P1 <<>> @sakura.matsusaka-u.ac.jp 75.244.192.in-addr.arpa. -t soa +norec ; (1 server found) ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57869 ^^^^^^^(*1) ;; flags: qr aa ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 1 ^^(*2) ;; QUESTION SECTION: ;75.244.192.in-addr.arpa. IN SOA ;; ANSWER SECTION: 75.244.192.in-addr.arpa. 86400 IN SOA sakura.matsusaka-u.ac.jp. root.sakura.matsusaka-u.ac.jp. 200103257 10800 1800 3600000 86400 (*3) ;; AUTHORITY SECTION: 75.244.192.in-addr.arpa. 86400 IN NS sakura.matsusaka-u.ac.jp. 75.244.192.in-addr.arpa. 86400 IN NS ns01.mctv.ne.jp. ;; ADDITIONAL SECTION: sakura.matsusaka-u.ac.jp. 86400 IN A 192.244.75.7 ;; Query time: 25 msec ;; SERVER: 192.244.75.7#53(192.244.75.7) ;; WHEN: Wed Jul 16 08:47:28 2008 ;; MSG SIZE rcvd: 163
*2,*3が異常でである。セカンダリはオーソリティBIT(AABit)がたっている必要があるので flags: qr aa ra; となる
$ dig @ns01.mctv.ne.jp 75.244.192.in-addr.arpa. -t soa +norec ; <<>> DiG 9.3.5-P1 <<>> @ns01.mctv.ne.jp 75.244.192.in-addr.arpa. -t soa +norec ; (1 server found) ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4165 ^^^^^^^(*1) ;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2 ^^(*2 aaがない) ;; QUESTION SECTION: ;75.244.192.in-addr.arpa. IN SOA ANSWER SECTION:がない (*3) ;; AUTHORITY SECTION: 75.244.192.in-addr.arpa. 43164 IN NS ns01.mctv.ne.jp. 75.244.192.in-addr.arpa. 43164 IN NS sakura.matsusaka-u.ac.jp.
;; ADDITIONAL SECTION: ns01.mctv.ne.jp. 86400 IN A 61.122.216.211 sakura.matsusaka-u.ac.jp. 86400 IN A 192.244.75.7 ;; Query time: 9 msec ;; SERVER: 61.122.216.211#53(61.122.216.211) ;; WHEN: Wed Jul 16 08:48:41 2008 ;; MSG SIZE rcvd: 138
http://www.nic.ad.jp/ja/dns/lame/index.html
逆引きネームサーバの登録について
http://www.nic.ad.jp/ja/ip/application-procedure/about-reverse-dns.html