## page was renamed from watchA/www.ana.co.jp watchA/www.ana.co.jpについて、ここに記述してください。 <> CNAME chain をたどるだけでも十分に手間なのだが、 　途中のCNAMEをすべてqname minimisationを適用しながら検索することを考えると、... == start == {{{ $ dnsq a www.ana.co.jp a.dns.jp 1 www.ana.co.jp: 163 bytes, 1+0+6+0 records, response, noerror query: 1 www.ana.co.jp authority: ana.co.jp 86400 NS a22-66.akam.net authority: ana.co.jp 86400 NS a6-64.akam.net authority: ana.co.jp 86400 NS a20-65.akam.net authority: ana.co.jp 86400 NS a11-64.akam.net authority: ana.co.jp 86400 NS a3-67.akam.net authority: ana.co.jp 86400 NS a1-189.akam.net }}} jp, co.jp などのzone cut 有無については省略。　　 ana.co.jp NS を見つけた。 == akam.net に問い合わせる == {{{ $ dnsq a www.ana.co.jp a1-189.akam.net 1 www.ana.co.jp: 70 bytes, 1+1+0+0 records, response, authoritative, noerror query: 1 www.ana.co.jp answer: www.ana.co.jp 86400 CNAME www.ana.co.jp.edgekey.net }}} ---- == www.ana.co.jp.edgekey.net == edgekey.net にzone cutを検出したところから、 {{{ $ dnsq a www.ana.co.jp.edgekey.net a.gtld-servers.net 1 www.ana.co.jp.edgekey.net: 500 bytes, 1+0+13+10 records, response, noerror query: 1 www.ana.co.jp.edgekey.net authority: edgekey.net 172800 NS ns1-66.akam.net authority: edgekey.net 172800 NS usw6.akam.net authority: edgekey.net 172800 NS adns1.akam.net authority: edgekey.net 172800 NS ns4-66.akam.net authority: edgekey.net 172800 NS ns7-65.akam.net authority: edgekey.net 172800 NS ns5-66.akam.net authority: edgekey.net 172800 NS a6-65.akam.net authority: edgekey.net 172800 NS a12-65.akam.net authority: edgekey.net 172800 NS a5-65.akam.net authority: edgekey.net 172800 NS a16-65.akam.net authority: edgekey.net 172800 NS a18-65.akam.net authority: edgekey.net 172800 NS a28-65.akam.net authority: edgekey.net 172800 NS a13-65.akam.net .... }}} qname minimisationではzone cut(NS)だけを探索する。 {{{ $ dnsq ns co.jp.edgekey.net.globalredir.akadns.net a1-128.akadns.net 2 co.jp.edgekey.net.globalredir.akadns.net: 85 bytes, 1+1+0+0 records, response, authoritative, noerror query: 2 co.jp.edgekey.net.globalredir.akadns.net answer: co.jp.edgekey.net.globalredir.akadns.net 300 CNAME a23.g.akamai.net $ dnsq ns ana.co.jp.edgekey.net.globalredir.akadns.net a1-128.akadns.net 2 ana.co.jp.edgekey.net.globalredir.akadns.net: 89 bytes, 1+1+0+0 records, response, authoritative, noerror query: 2 ana.co.jp.edgekey.net.globalredir.akadns.net answer: ana.co.jp.edgekey.net.globalredir.akadns.net 300 CNAME a23.g.akamai.net }}} つまり、ここのCNAMEは無視されて、 {{{ $ dnsq a www.ana.co.jp.edgekey.net ns1-66.akam.net 1 www.ana.co.jp.edgekey.net: 102 bytes, 1+1+0+0 records, response, authoritative, noerror query: 1 www.ana.co.jp.edgekey.net answer: www.ana.co.jp.edgekey.net 21600 CNAME www.ana.co.jp.edgekey.net.globalredir.akadns.net }}} このCNAMEの先を探すことになる。 == www.ana.co.jp.edgekey.net.globalredir.akadns.net == {{{ $ dnsq a www.ana.co.jp.edgekey.net.globalredir.akadns.net a.gtld-servers.net 1 www.ana.co.jp.edgekey.net.globalredir.akadns.net: 371 bytes, 1+0+10+5 records, response, noerror query: 1 www.ana.co.jp.edgekey.net.globalredir.akadns.net authority: akadns.net 172800 NS a3-129.akadns.net authority: akadns.net 172800 NS a7-131.akadns.net authority: akadns.net 172800 NS a11-129.akadns.net authority: akadns.net 172800 NS a1-128.akadns.net authority: akadns.net 172800 NS a9-128.akadns.net authority: akadns.net 172800 NS a5-130.akadns.org authority: akadns.net 172800 NS a13-130.akadns.org authority: akadns.net 172800 NS a28-129.akadns.org authority: akadns.net 172800 NS a12-131.akadns.org authority: akadns.net 172800 NS a18-128.akadns.org additional: a3-129.akadns.net 172800 A 96.7.49.129 additional: a7-131.akadns.net 172800 A 23.61.199.131 additional: a11-129.akadns.net 172800 A 84.53.139.129 additional: a1-128.akadns.net 172800 A 193.108.88.128 additional: a9-128.akadns.net 172800 A 184.85.248.128 }}} {{{ $ dnsq a www.ana.co.jp.edgekey.net.globalredir.akadns.net a1-128.akadns.net 1 www.ana.co.jp.edgekey.net.globalredir.akadns.net: 99 bytes, 1+1+0+0 records, response, authoritative, noerror query: 1 www.ana.co.jp.edgekey.net.globalredir.akadns.net answer: www.ana.co.jp.edgekey.net.globalredir.akadns.net 3600 CNAME e1883.b.akamaiedge.net }}} [[/つづき]]