DNS/appldnsldについて、ここに記述してください。
1. iPhone update
so-net 提供のキャッシュはOK、router の TCP/53 もOKということに
;; Query time: 33 msec ;; SERVER: 202.238.95.24#53(202.238.95.24) ;; WHEN: Sun Mar 11 19:52:59 2012 ;; MSG SIZE rcvd: 742
router のおまけのforwarderはTCPがだめらしい。 (Buffalo WZR-HP-G300NH/E)
%dig a appldnld.apple.com @192.168.11.1 ;; Truncated, retrying in TCP mode. ;; ERROR: ID mismatch: expected ID 11823, got 40192
edns も試してみた。
%dig +edns=1 -t a appldnld.apple.com @192.168.11.1 ; <<>> DiG 9.8.1-P1 <<>> +edns=1 -t a appldnld.apple.com @192.168.11.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: BADVERS, id: 6279 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;appldnld.apple.com. IN A ;; Query time: 35 msec ;; SERVER: 192.168.11.1#53(192.168.11.1) ;; WHEN: Sun Mar 11 20:00:34 2012 ;; MSG SIZE rcvd: 47
2. sakura BIND 9.9.0
default 設定で EDNS0 が使われているようだ。 TCPには行かない。
%dig @211.129.14.166 appldnld.apple.com
; <<>> DiG 9.9.0 <<>> @211.129.14.166 appldnld.apple.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5992 ;; flags: qr rd ra; QUERY: 1, ANSWER: 9, AUTHORITY: 10, ADDITIONAL: 11 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;appldnld.apple.com. IN A
;; ANSWER SECTION: appldnld.apple.com. 1988 IN CNAME appldnld.apple.com.akadns.net. appldnld.apple.com.akadns.net. 47 IN CNAME appldnld2.apple.com.edgesuite.net. appldnld2.apple.com.edgesuite.net. 4818 IN CNAME appldnld2.apple.com.edgesuite.net.globalredir.akadns.net. appldnld2.apple.com.edgesuite.net.globalredir.akadns.net. 47 IN CNAME a1271.gi3.akamai.net. a1271.gi3.akamai.net. 20 IN A 198.87.182.162 a1271.gi3.akamai.net. 20 IN A 198.87.182.210 a1271.gi3.akamai.net. 20 IN A 198.87.182.137 a1271.gi3.akamai.net. 20 IN A 198.87.182.147 a1271.gi3.akamai.net. 20 IN A 198.87.182.154 ;; AUTHORITY SECTION: gi3.akamai.net. 16503 IN NS n2gi3.akamai.net. gi3.akamai.net. 16503 IN NS n3gi3.akamai.net. gi3.akamai.net. 16503 IN NS n4gi3.akamai.net. gi3.akamai.net. 16503 IN NS n5gi3.akamai.net. gi3.akamai.net. 16503 IN NS n6gi3.akamai.net. gi3.akamai.net. 16503 IN NS n7gi3.akamai.net. gi3.akamai.net. 16503 IN NS n8gi3.akamai.net. gi3.akamai.net. 16503 IN NS a0gi3.akamai.net. gi3.akamai.net. 16503 IN NS n0gi3.akamai.net. gi3.akamai.net. 16503 IN NS n1gi3.akamai.net. ;; ADDITIONAL SECTION: a0gi3.akamai.net. 19082 IN AAAA 2001:218:2007:ffff:9208:8c00:5f81:82a6 n0gi3.akamai.net. 18282 IN A 61.213.146.8 n1gi3.akamai.net. 7281 IN A 61.213.189.29 n2gi3.akamai.net. 16861 IN A 61.213.146.8 n3gi3.akamai.net. 17445 IN A 121.119.254.182 n4gi3.akamai.net. 16778 IN A 125.252.227.157 n5gi3.akamai.net. 35379 IN A 117.104.136.38 n6gi3.akamai.net. 29037 IN A 61.213.146.6 n7gi3.akamai.net. 15050 IN A 125.252.227.157 n8gi3.akamai.net. 28684 IN A 125.252.227.149 ;; Query time: 16 msec ;; SERVER: 211.129.14.166#53(211.129.14.166) ;; WHEN: Wed Mar 14 23:15:41 2012 ;; MSG SIZE rcvd: 677
3. 9.8.1-P1
%dig +edns=0 @211.129.14.166 appldnld.apple.com
;; Query time: 54 msec ;; SERVER: 211.129.14.166#53(211.129.14.166) ;; WHEN: Wed Mar 14 23:20:25 2012 ;; MSG SIZE rcvd: 709