== watchNS/gochagocha.org == [[../gochagocha.org/2]] [[../gochagocha.org/3]] ---- [[watchNS/strange-x.com]]にも依存している。 -- ToshinoriMaeno <> %dnsq a g.server.gochagocha.org d0.org.afilias-nst.org {{{ 1 g.server.gochagocha.org: 104 bytes, 1+0+2+1 records, response, noerror query: 1 g.server.gochagocha.org authority: gochagocha.org 86400 NS green.ribbon.to authority: gochagocha.org 86400 NS dns.gochagocha.org additional: dns.gochagocha.org 86400 A 153.150.14.90 }}} %dnsq a g.server.gochagocha.org 153.150.14.90 {{{ 1 g.server.gochagocha.org: 138 bytes, 1+1+2+2 records, response, authoritative, noerror query: 1 g.server.gochagocha.org answer: g.server.gochagocha.org 7200 A 153.150.14.85 authority: gochagocha.org 7200 NS dns.gochagocha.org authority: gochagocha.org 7200 NS dns.strange-x.com additional: dns.strange-x.com 86400 A 153.150.14.90 additional: dns.gochagocha.org 7200 A 153.150.14.90 }}} ここにある strange-x.com が危険だ。[[whois/strange-x.com]] AレコードのTTLが長いことが発症を抑制するかどうかは疑問だが。 -- ToshinoriMaeno <> まともなキャッシュサーバはこのadditionalは捨てる。ｗ {{{ additional: dns.strange-x.com 86400 A 153.150.14.90 }}} == 8.8.8.8 の返事 == {{{ $ dig -t ns gochagocha.org @8.8.8.8 ; <<>> DiG 9.9.5-3ubuntu0.6-Ubuntu <<>> -t ns gochagocha.org @8.8.8.8 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36318 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;gochagocha.org. IN NS ;; ANSWER SECTION: gochagocha.org. 7199 IN NS dns.gochagocha.org. gochagocha.org. 7199 IN NS dns.strange-x.com. ;; Query time: 124 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Sun Dec 20 11:05:45 JST 2015 ;; MSG SIZE rcvd: 92 }}}