watchWWW/cisco.comについて、ここに記述してください。

[[/kresd.log]]

== 古い設定か ==
http://www.cisco.com.ipaddress.com/

{{{
IP Address of Cisco is 95.100.176.188
Hostname:	www.cisco.com
IP Address:	95.100.176.188
Host of this IP:	a95-100-176-188.deploy.akamaitechnologies.com
Organization:	Akamai Technologies
ISP:	Akamai Technologies
Updated:	03/14/2016 07:55 PM
}}}

== 最近の調査 ==
$ dnsq soa cisco.com a.gtld-servers.net
{{{
6 cisco.com:
213 bytes, 1+0+3+6 records, response, noerror
query: 6 cisco.com
authority: cisco.com 172800 NS ns1.cisco.com
authority: cisco.com 172800 NS ns2.cisco.com
authority: cisco.com 172800 NS ns3.cisco.com
additional: ns1.cisco.com 172800 28 \040\001\004\040\021\001\000\006\000\000\000\000\000\000\000\012
additional: ns1.cisco.com 172800 A 72.163.5.201
additional: ns2.cisco.com 172800 28 \040\001\004\040\040AP\000\000\000\000\000\000\000\000\012
additional: ns2.cisco.com 172800 A 64.102.255.44
additional: ns3.cisco.com 172800 A 173.37.146.41
additional: ns3.cisco.com 172800 28 \040\001\004\040\022\001\000\007\000\000\000\000\000\000\000\012
}}}
{{{
$ dnsq soa cisco.com 64.102.255.44
6 cisco.com:
274 bytes, 1+1+3+6 records, response, authoritative, noerror
query: 6 cisco.com
answer: cisco.com 86400 SOA edns-aln1-1-l.cisco.com postmaster.cisco.com 16034765 7200 1800 864000 86400
authority: cisco.com 86400 NS ns2.cisco.com
authority: cisco.com 86400 NS ns3.cisco.com
authority: cisco.com 86400 NS ns1.cisco.com
additional: ns1.cisco.com 600 A 72.163.5.201
additional: ns1.cisco.com 86400 28 \040\001\004\040\021\001\000\006\000\000\000\000\000\000\000\012
additional: ns2.cisco.com 86400 A 64.102.255.44
additional: ns2.cisco.com 86400 28 \040\001\004\040\040AP\000\000\000\000\000\000\000\000\012
additional: ns3.cisco.com 86400 A 173.37.146.41
additional: ns3.cisco.com 86400 28 \040\001\004\040\022\001\000\007\000\000\000\000\000\000\000\012
}}}

{{{
$ dnsq a www.cisco.com 64.102.255.44
1 www.cisco.com:
69 bytes, 1+1+0+0 records, response, authoritative, noerror
query: 1 www.cisco.com
answer: www.cisco.com 3600 CNAME www.cisco.com.akadns.net

}}}
  [[/akadns.net]] の詳細
{{{
$ dnsq a www.cisco.com.akadns.net a3-129.akadns.net
1 www.cisco.com.akadns.net:
80 bytes, 1+1+0+0 records, response, authoritative, noerror
query: 1 www.cisco.com.akadns.net
answer: www.cisco.com.akadns.net 300 CNAME wwwds.cisco.com.edgekey.net
}}}

== nxdomain返答! ==
$ dnsq a com.akadns.net a3-129.akadns.net
{{{
1 com.akadns.net:
98 bytes, 1+0+1+0 records, response, authoritative, nxdomain
query: 1 com.akadns.net
authority: akadns.net 180 SOA internal.akadns.net hostmaster.akamai.com 1458427663 90000 90000 90000 180
}}}

念のためゾーンサーバを確認しておく。

$ dnsq a www.cisco.com.akadns.net a.gtld-servers.net
{{{
1 www.cisco.com.akadns.net:
346 bytes, 1+0+10+5 records, response, noerror
query: 1 www.cisco.com.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 a4-131.akadns.org
authority: akadns.net 172800 NS a10-128.akadns.org
authority: akadns.net 172800 NS a28-129.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
}}}