## page was renamed from watchNS/cz
= watchNS/cz =
子ゾーンnic.cz中のENT下の名前をNSに使用している。

$ dnsq ns cz a.root-servers.net
{{{
2 cz:
267 bytes, 1+0+4+8 records, response, noerror
query: 2 cz
authority: cz 172800 NS b.ns.nic.cz
authority: cz 172800 NS c.ns.nic.cz
authority: cz 172800 NS d.ns.nic.cz
authority: cz 172800 NS a.ns.nic.cz
additional: b.ns.nic.cz 172800 A 194.0.13.1
additional: b.ns.nic.cz 172800 28 \040\001\006x\000\020\000\000\000\000\000\000\000\000\000\001
additional: c.ns.nic.cz 172800 A 194.0.14.1
additional: c.ns.nic.cz 172800 28 \040\001\006x\000\021\000\000\000\000\000\000\000\000\000\001
additional: d.ns.nic.cz 172800 A 193.29.206.1
additional: d.ns.nic.cz 172800 28 \040\001\006x\000\001\000\000\000\000\000\000\000\000\000\001
additional: a.ns.nic.cz 172800 A 194.0.12.1
additional: a.ns.nic.cz 172800 28 \040\001\006x\000\017\000\000\000\000\000\000\000\000\000\001
}}}

== multi-cast ==

$ dnsq ns cz 194.0.12.1
{{{
2 cz:
223 bytes, 1+4+0+6 records, response, authoritative, noerror
query: 2 cz
answer: cz 18000 NS a.ns.nic.cz
answer: cz 18000 NS b.ns.nic.cz
answer: cz 18000 NS c.ns.nic.cz
answer: cz 18000 NS d.ns.nic.cz
additional: a.ns.nic.cz 18000 A 194.0.12.1
additional: a.ns.nic.cz 18000 28 \040\001\006x\000\017\000\000\000\000\000\000\000\000\000\001
additional: b.ns.nic.cz 18000 A 194.0.13.1
additional: b.ns.nic.cz 18000 28 \040\001\006x\000\020\000\000\000\000\000\000\000\000\000\001
additional: d.ns.nic.cz 18000 A 193.29.206.1
additional: d.ns.nic.cz 18000 28 \040\001\006x\000\001\000\000\000\000\000\000\000\000\000\001
}}}

c.ns.nic.cz の additional がないことに注意。

[[watchNS/nic.cz]]

$ dnsq ns ns.nic.cz 194.0.12.1
{{{
2 ns.nic.cz:
76 bytes, 1+0+1+0 records, response, authoritative, noerror
query: 2 ns.nic.cz
authority: nic.cz 1800 SOA a.ns.nic.cz hostmaster.nic.cz 1475167802 10800 3600 1209600 7200
}}}

----
== c.ns.nic.cz ==

$ dnsq ns cz c.ns.nic.cz
{{{
2 cz:
91 bytes, 1+4+0+0 records, response, authoritative, noerror
query: 2 cz
answer: cz 18000 NS b.ns.nic.cz
answer: cz 18000 NS d.ns.nic.cz
answer: cz 18000 NS c.ns.nic.cz
answer: cz 18000 NS a.ns.nic.cz
}}}

$ dnsq ns nic.cz c.ns.nic.cz
{{{
2 nic.cz:
207 bytes, 1+3+0+6 records, response, authoritative, noerror
query: 2 nic.cz
answer: nic.cz 1800 NS a.ns.nic.cz
answer: nic.cz 1800 NS b.ns.nic.cz
answer: nic.cz 1800 NS d.ns.nic.cz
additional: a.ns.nic.cz 1800 A 194.0.12.1
additional: a.ns.nic.cz 1800 28 \040\001\006x\000\017\000\000\000\000\000\000\000\000\000\001
additional: b.ns.nic.cz 1800 A 194.0.13.1
additional: b.ns.nic.cz 1800 28 \040\001\006x\000\020\000\000\000\000\000\000\000\000\000\001
additional: d.ns.nic.cz 1800 A 193.29.206.1
additional: d.ns.nic.cz 1800 28 \040\001\006x\000\001\000\000\000\000\000\000\000\000\000\001
}}}

c.ns.nic.cz はnic.czのNSには現れないが、こういう返事をする。-- ToshinoriMaeno <<DateTime(2016-10-03T06:13:44+0900)>>

$ dnsq soa nic.cz c.ns.nic.cz
{{{
6 nic.cz:
254 bytes, 1+1+3+6 records, response, authoritative, noerror
query: 6 nic.cz
answer: nic.cz 1800 SOA a.ns.nic.cz hostmaster.nic.cz 1475167802 10800 3600 1209600 7200
authority: nic.cz 1800 NS b.ns.nic.cz
authority: nic.cz 1800 NS d.ns.nic.cz
authority: nic.cz 1800 NS a.ns.nic.cz
additional: a.ns.nic.cz 1800 A 194.0.12.1
additional: a.ns.nic.cz 1800 28 \040\001\006x\000\017\000\000\000\000\000\000\000\000\000\001
additional: b.ns.nic.cz 1800 A 194.0.13.1
additional: b.ns.nic.cz 1800 28 \040\001\006x\000\020\000\000\000\000\000\000\000\000\000\001
additional: d.ns.nic.cz 1800 A 193.29.206.1
additional: d.ns.nic.cz 1800 28 \040\001\006x\000\001\000\000\000\000\000\000\000\000\000\001
}}}

== a.ns.nic.cz ==
その時々で返事が異なる。

$ dnsq ns cz a.ns.nic.cz
{{{
2 cz:
91 bytes, 1+4+0+0 records, response, authoritative, noerror
query: 2 cz
answer: cz 18000 NS d.ns.nic.cz
answer: cz 18000 NS b.ns.nic.cz
answer: cz 18000 NS c.ns.nic.cz
answer: cz 18000 NS a.ns.nic.cz
}}}
$ dnsq ns cz a.ns.nic.cz
{{{
2 cz:
223 bytes, 1+4+0+6 records, response, authoritative, noerror
query: 2 cz
answer: cz 18000 NS a.ns.nic.cz
answer: cz 18000 NS b.ns.nic.cz
answer: cz 18000 NS c.ns.nic.cz
answer: cz 18000 NS d.ns.nic.cz
additional: a.ns.nic.cz 18000 A 194.0.12.1
additional: b.ns.nic.cz 18000 A 194.0.13.1
additional: d.ns.nic.cz 18000 A 193.29.206.1
additional: a.ns.nic.cz 18000 28 \040\001\006x\000\017\000\000\000\000\000\000\000\000\000\001
additional: b.ns.nic.cz 18000 28 \040\001\006x\000\020\000\000\000\000\000\000\000\000\000\001
additional: d.ns.nic.cz 18000 28 \040\001\006x\000\001\000\000\000\000\000\000\000\000\000\001
}}}

additional に c.ns.nic.cz がないことは？
  additional sectionは付けなければならないものではないから、なくても構わない。
それにしても、気持ち悪い返答ではある。
-- ToshinoriMaeno <<DateTime(2016-10-03T06:27:59+0900)>>