## page was renamed from DNS/用語/PublicDNS/Google/togetter.com-0
## page was renamed from DNS/PublicDNS/Google/togetter.com-0
## page was renamed from DNS/Google公開キャッシュ/togetter.com-0
## page was renamed from DNS/キャッシュサーバ/Google/togetter.com-0
## page was renamed from GoogleCache/togetter.com
= GoogleCache/togetter.com =
について、ここに記述してください。

いつまでCNAMEを答えつづけるだろうか。 永続的浸透問題？　[[DNS/watch/togetter.com]] など
　togetter.com の古い設定を答えるサーバが残っているかぎり、治らないのかも。

キャッシュがクリアされた模様。（古いサーバは返事を続けていることから推測） -- ToshinoriMaeno <<DateTime(2011-07-08T07:47:20+0900)>>

浸透問題はいつまでも解決しないのか。
----
$ dig a togetter.com @8.8.8.8
{{{
; <<>> DiG 9.7.3 <<>> a togetter.com @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10476
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;togetter.com.			IN	A

;; ANSWER SECTION:
togetter.com.		367	IN	CNAME	togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com.
togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com. 18 IN A 46.51.250.145

;; Query time: 87 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Jul  7 17:22:43 2011
;; MSG SIZE  rcvd: 115
}}}

-----
==  NS ==
$ dig ns togetter.com @8.8.8.8
{{{
; <<>> DiG 9.7.3 <<>> ns togetter.com @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6050
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;togetter.com.			IN	NS

;; ANSWER SECTION:
togetter.com.		1	IN	CNAME	togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com.
togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com. 518	IN NS ns-947.amazon.com.

;; Query time: 71 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Jul  7 18:58:55 2011
;; MSG SIZE  rcvd: 127
}}}

tmaeno@:~$ dig ns togetter.com @8.8.8.8
{{{
; <<>> DiG 9.7.3 <<>> ns togetter.com @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12992
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;togetter.com.			IN	NS

;; ANSWER SECTION:
togetter.com.		3600	IN	NS	dns1.name-services.com.
togetter.com.		3600	IN	NS	dns2.name-services.com.
togetter.com.		3600	IN	NS	dns3.name-services.com.
togetter.com.		3600	IN	NS	dns4.name-services.com.
togetter.com.		3600	IN	NS	dns5.name-services.com.

;; Query time: 276 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Jul  7 18:58:56 2011
;; MSG SIZE  rcvd: 139
}}}

----

NSとCNAMEとがともにキャッシュされている状況ではCNAMEを優先して答えるらしい。-- ToshinoriMaeno <<DateTime(2011-07-07T19:08:18+0900)>>

CNAMEのTTLが残っているのに、問い合わせるとTTLが増えるのはなぜか。

== name-services.com ==

$ dig a togetter.com @dns1.name-services.com
{{{
; <<>> DiG 9.7.3 <<>> a togetter.com @dns1.name-services.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 65300
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;togetter.com.			IN	A

;; ANSWER SECTION:
togetter.com.		1800	IN	CNAME	togetter-outer-1482106848.ap-northeast-1.elb.amazonaws.com.

;; Query time: 223 msec
;; SERVER: 98.124.192.1#53(98.124.192.1)
;; WHEN: Thu Jul  7 19:02:06 2011
;; MSG SIZE  rcvd: 99
}}}