DNS/TCP/www3.nhk.or.jpについて、ここに記述してください。

unbound 1.5.8 で tcp-upstream:yes にしたら、　
　resolveできるところとできないところが発生している。

TCPがどう関係するのか、調べてみるのにいいので、続ける。
　　https://www.usenix.org/conference/fast16/technical-sessions/presentation/manousakis　OK
== www3.nhk.or.jp ==
{{{
$ 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 ns10.nhk.or.jp
authority: nhk.or.jp 86400 NS ns.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 133.127.64.240
{{{
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
}}}

このあたりですでに嫌なものを感じる。

$ dnsq a www3.nhk.or.jp.edgesuite.net a.gtld-servers.net
{{{
1 www3.nhk.or.jp.edgesuite.net:
505 bytes, 1+0+13+11 records, response, noerror
query: 1 www3.nhk.or.jp.edgesuite.net
authority: edgesuite.net 172800 NS ns1-2.akam.net
authority: edgesuite.net 172800 NS usw6.akam.net
authority: edgesuite.net 172800 NS adns1.akam.net
authority: edgesuite.net 172800 NS adns2.akam.net
authority: edgesuite.net 172800 NS adns3.akam.net
authority: edgesuite.net 172800 NS ns4-65.akam.net
authority: edgesuite.net 172800 NS ns7-65.akam.net
authority: edgesuite.net 172800 NS ns5-65.akam.net
authority: edgesuite.net 172800 NS a13-64.akam.net
authority: edgesuite.net 172800 NS a24-64.akam.net
authority: edgesuite.net 172800 NS a5-64.akam.net
authority: edgesuite.net 172800 NS a18-64.akam.net
authority: edgesuite.net 172800 NS a26-64.akam.net
additional: ns1-2.akam.net 172800 A 193.108.91.2
additional: ns1-2.akam.net 172800 28 &\000\024\001\000\002\000\000\000\000\000\000\000\000\000\002
additional: usw6.akam.net 172800 A 23.61.199.64
additional: adns1.akam.net 172800 A 96.7.50.66
additional: adns2.akam.net 172800 A 72.246.46.66
additional: adns3.akam.net 172800 A 184.26.161.67
additional: ns4-65.akam.net 172800 A 84.53.139.65
additional: ns7-65.akam.net 172800 A 96.7.49.65
additional: ns5-65.akam.net 172800 A 184.85.248.65
additional: a13-64.akam.net 172800 A 2.22.230.64
additional: a24-64.akam.net 172800 A 2.16.130.64
}}}
$ dnsq a www3.nhk.or.jp.edgesuite.net 23.61.199.64
{{{
1 www3.nhk.or.jp.edgesuite.net:
76 bytes, 1+1+0+0 records, response, authoritative, noerror
query: 1 www3.nhk.or.jp.edgesuite.net
answer: www3.nhk.or.jp.edgesuite.net 21600 CNAME a1702.g1.akamai.net
tmaeno@tm:~$ dnsq a a1702.g1.akamai.net a.gtld-servers.net
1 a1702.g1.akamai.net:
510 bytes, 1+0+13+13 records, response, noerror
query: 1 a1702.g1.akamai.net
authority: akamai.net 172800 NS zc.akamaitech.net
authority: akamai.net 172800 NS zd.akamaitech.net
authority: akamai.net 172800 NS ze.akamaitech.net
authority: akamai.net 172800 NS zg.akamaitech.net
authority: akamai.net 172800 NS zh.akamaitech.net
authority: akamai.net 172800 NS zi.akamaitech.net
authority: akamai.net 172800 NS ns3-193.akamaitech.net
authority: akamai.net 172800 NS ns2-193.akamaitech.net
authority: akamai.net 172800 NS ns4-193.akamaitech.net
authority: akamai.net 172800 NS ns6-193.akamaitech.net
authority: akamai.net 172800 NS ns7-193.akamaitech.net
authority: akamai.net 172800 NS ns5-193.akamaitech.net
authority: akamai.net 172800 NS ns1-1.akamaitech.net
additional: zc.akamaitech.net 172800 A 23.74.25.192
additional: zd.akamaitech.net 172800 A 95.101.36.192
additional: ze.akamaitech.net 172800 A 184.26.161.192
additional: zg.akamaitech.net 172800 A 96.7.50.192
additional: zh.akamaitech.net 172800 A 23.211.133.192
additional: zi.akamaitech.net 172800 A 184.26.161.192
additional: ns3-193.akamaitech.net 172800 A 23.61.199.193
additional: ns2-193.akamaitech.net 172800 A 2.22.230.193
additional: ns4-193.akamaitech.net 172800 A 84.53.139.193
additional: ns6-193.akamaitech.net 172800 A 95.100.168.193
additional: ns7-193.akamaitech.net 172800 A 96.7.49.193
additional: ns5-193.akamaitech.net 172800 A 184.85.248.193
additional: ns1-1.akamaitech.net 172800 A 193.108.88.1
tmaeno@tm:~$ dnsq a a1702.g1.akamai.net a1702.g1.akamai.net
dnsq: fatal: unable to parse: temporary failure
tmaeno@tm:~$ dnsq a a1702.g1.akamai.net 23.74.25.192
1 a1702.g1.akamai.net:
341 bytes, 1+0+8+8 records, response, noerror
query: 1 a1702.g1.akamai.net
authority: g1.akamai.net 4000 NS a1g1.akamai.net
authority: g1.akamai.net 6000 NS n1g1.akamai.net
authority: g1.akamai.net 8000 NS n4g1.akamai.net
authority: g1.akamai.net 6000 NS n5g1.akamai.net
authority: g1.akamai.net 8000 NS n2g1.akamai.net
authority: g1.akamai.net 4000 NS n3g1.akamai.net
authority: g1.akamai.net 4000 NS n0g1.akamai.net
authority: g1.akamai.net 6000 NS a0g1.akamai.net
additional: n3g1.akamai.net 4000 A 173.222.133.4
additional: n4g1.akamai.net 8000 A 173.222.133.7
additional: n2g1.akamai.net 8000 A 88.221.81.192
additional: a1g1.akamai.net 4000 28 &\000\024\027\000-\360\000\205\016D[c5\303W
additional: a0g1.akamai.net 6000 28 &\000\024\027\000-\360\000\205\017D[c5\303W
additional: n0g1.akamai.net 4000 A 124.40.42.53
additional: n1g1.akamai.net 6000 A 69.192.3.52
additional: n5g1.akamai.net 6000 A 173.222.133.6
tmaeno@tm:~$ dnsq a a1702.g1.akamai.net 173.222.133.4
1 a1702.g1.akamai.net:
85 bytes, 1+3+0+0 records, response, authoritative, noerror
query: 1 a1702.g1.akamai.net
answer: a1702.g1.akamai.net 20 A 110.232.152.66
answer: a1702.g1.akamai.net 20 A 110.232.152.32
answer: a1702.g1.akamai.net 20 A 110.232.152.58
}}}