## page was renamed from DNS/基礎知識/TCP/nhk.or.jp ## page was renamed from DNS/用語/TCP/nhk.or.jp ## page was renamed from DNS/TCP/nhk.or.jp DNS/TCP/nhk.or.jpについて、ここに記述してください。 $ dnsq a www3.nhk.or.jp a.dns.jp {{{ 1 www3.nhk.or.jp: 100 bytes, 1+0+2+2 records, response, noerror query: 1 www3.nhk.or.jp authority: nhk.or.jp 86400 NS ns.nhk.or.jp authority: nhk.or.jp 86400 NS ns10.nhk.or.jp additional: ns.nhk.or.jp 86400 A 133.127.64.240 additional: ns10.nhk.or.jp 86400 A 133.127.255.71 }}} $ dnsq a www3.nhk.or.jp ns.nhk.or.jp {{{ 1 www3.nhk.or.jp: 74 bytes, 1+1+0+0 records, response, authoritative, noerror query: 1 www3.nhk.or.jp answer: www3.nhk.or.jp 600 CNAME www3.nhk.or.jp.edgesuite.net }}} == www3.nhk.or.jp.edgesuite.net == TCPで返事が返ってこなかったのだが、改めて確認してみた。 -- ToshinoriMaeno <> $ dig -t a +tcp www3.nhk.or.jp.edgesuite.net. {{{ ; <<>> DiG 9.9.5-3-Ubuntu <<>> -t a +tcp www3.nhk.or.jp.edgesuite.net. ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52208 ;; flags: qr rd ra; QUERY: 1, ANSWER: 7, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;www3.nhk.or.jp.edgesuite.net. IN A ;; ANSWER SECTION: www3.nhk.or.jp.edgesuite.net. 21200 IN CNAME a1702.g1.akamai.net. a1702.g1.akamai.net. 20 IN A 72.246.188.98 a1702.g1.akamai.net. 20 IN A 72.246.188.136 a1702.g1.akamai.net. 20 IN A 72.246.188.96 a1702.g1.akamai.net. 20 IN A 72.246.188.89 a1702.g1.akamai.net. 20 IN A 72.246.188.121 a1702.g1.akamai.net. 20 IN A 72.246.188.154 ;; Query time: 37 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Thu Sep 18 08:07:18 JST 2014 ;; MSG SIZE rcvd: 183 }}} $ dig -t a +tcp a1702.g1.akamai.net. {{{ ; <<>> DiG 9.9.5-3-Ubuntu <<>> -t a +tcp a1702.g1.akamai.net. ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37330 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;a1702.g1.akamai.net. IN A ;; ANSWER SECTION: a1702.g1.akamai.net. 20 IN A 72.246.188.155 a1702.g1.akamai.net. 20 IN A 72.246.188.88 ;; Query time: 37 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Thu Sep 18 08:08:05 JST 2014 ;; MSG SIZE rcvd: 80 }}} == upstream tcp == unbound.conf で TCP を使うようにしてみる。　-- ToshinoriMaeno <> 返事がない。 $ dig -t a +tcp www3.nhk.or.jp.edgesuite.net. {{{ ; <<>> DiG 9.9.5-3-Ubuntu <<>> -t a +tcp www3.nhk.or.jp.edgesuite.net. ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 588 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;www3.nhk.or.jp.edgesuite.net. IN A ;; Query time: 2582 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Thu Sep 18 08:13:58 JST 2014 ;; MSG SIZE rcvd: 57 }}} ns.nhk.or.jp は返答があるので、akamai 側の問題のようだ。 $ dig -t a +tcp www3.nhk.or.jp @ns.nhk.or.jp {{{ ; <<>> DiG 9.9.5-3-Ubuntu <<>> -t a +tcp www3.nhk.or.jp @ns.nhk.or.jp ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54258 ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;www3.nhk.or.jp. IN A ;; ANSWER SECTION: www3.nhk.or.jp. 600 IN CNAME www3.nhk.or.jp.edgesuite.net. ;; Query time: 39 msec ;; SERVER: 133.127.64.240#53(133.127.64.240) ;; WHEN: Thu Sep 18 08:15:40 JST 2014 ;; MSG SIZE rcvd: 85 }}}