{"id":6841,"date":"2015-10-27T11:51:32","date_gmt":"2015-10-27T02:51:32","guid":{"rendered":"http:\/\/mike.md.tsukuba.ac.jp\/terui\/blog\/?p=6841"},"modified":"2021-12-27T09:37:39","modified_gmt":"2021-12-27T00:37:39","slug":"%e3%82%aa%e3%83%bc%e3%83%97%e3%83%b3%e3%83%aa%e3%82%be%e3%83%ab%e3%83%90%e5%95%8f%e9%a1%8c","status":"publish","type":"post","link":"https:\/\/nbsigh2.com\/?p=6841","title":{"rendered":"\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30a2\u30c9\u30ec\u30b9\u3067\u306e\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u554f\u984c"},"content":{"rendered":"

Open Resolver \u554f\u984c\u3068\u3044\u3046\u306e\u304c\u3042\u308b\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u901a\u4fe1\u306fip address \u3067\u884c\u308f\u308c\u308b\u304c\u3001\u305d\u308c\u3067\u306f\u6570\u5b57\u306e\u7f85\u5217\u306a\u306e\u3067\u4eba\u304c\u7406\u89e3\u3067\u304d\u306a\u3044\u3002\u3060\u304b\u3089\u305d\u306e\u6570\u5b57\u5217\u3092\u308f\u304b\u308a\u3084\u3059\u3044\u767b\u9332\u3057\u305f\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u6587\u5b57\u5217\uff08\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\uff09\u3068\u5bfe\u5fdc\u3055\u305b\u3066\u3001\u901a\u4fe1\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u304cDNS\u306a\u306e\u3060\u3002\u3060\u304b\u3089\u5229\u7528\u8005\u306fDNS\u30b5\u30fc\u30d0\u306b\u307e\u305a\u30a2\u30af\u30bb\u30b9\u3057\u3066ip address \u3092\u53d6\u5f97\u3057\u3066\u3001\u305d\u306eip address \u3067\u76f8\u624b\u5148\u306b\u63a5\u7d9a\u3059\u308b\u306e\u3060\u3002\u5168\u3066\u306eip address \u3068\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\u306e\u5bfe\u5fdc\u8868\u3092\uff11\u3064\u306eDNS \u30b5\u30fc\u30d0\u304c\u53d7\u3051\u3082\u3064\u306a\u3093\u3066\u3053\u3068\u306f\u3042\u308a\u3048\u306a\u3044\u3002\u30d2\u30a8\u30e9\u30eb\u30ad\u30fc\u304c\u3042\u3063\u3066\u3001\u4e0b\u306e\u30ec\u30d9\u30eb\u3067\u89e3\u6c7a\u3067\u304d\u308b\u3068\u304d\u306f\u3001\u4e0a\u306eDNS\u306b\u554f\u3044\u5408\u308f\u305b\u308b\u3053\u3068\u304c\u306a\u3044\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u3002\u6700\u4e0a\u4f4d\u306eDNS\u30b5\u30fc\u30d0\u306f\u5168\u4e16\u754c\u3067\uff17\u53f0\u3001\u305d\u306e\u3046\u3061\u306e\uff11\u53f0\u306f\u65e5\u672c\u306e\u3069\u3063\u304b\u306b\u3042\u308b\u3068\u6614\u805e\u3044\u305f\u304c\u3001\u6700\u8fd1\u306f\u3069\u3046\u306a\u3093\u3060\u308d\uff1f\u8a2d\u7f6e\u3057\u3066\u3044\u308b\u5834\u6240\u306f\u79d8\u5bc6\u3060\u3002\u3053\u3053\u304c\u653b\u6483\u3055\u308c\u308b\u3068\u30cd\u30c3\u30c8\u304c\u3068\u307e\u3063\u3061\u3083\u3046\u304b\u3089\u306a\u3002
\n\u306a\u306e\u3067\u3001\u4e0b\u4f4d\u306eDNS\u30b5\u30fc\u30d0\u306f\u7121\u6570\u306b\u3042\u308b\u306e\u3060\u3002\u3053\u306eDNS\u30b5\u30fc\u30d0\u306f\u8981\u6c42\u304c\u3042\u308b\u3068\u3059\u3050\u7b54\u3048\u3066\u304f\u308c\u308b\u304c\u3001\uff11\u53f0\u306eDNS\u30b5\u30fc\u30d0\u304c\u3069\u3053\u304b\u3089\u306e\u8981\u6c42\u306b\u3082\u5fdc\u3058\u308b\u3068\u3001\u5927\u91cf\u306e\u8981\u6c42\u304c\u62bc\u3057\u4ed8\u3051\u3089\u308c\u3066\u305d\u306e\u30b5\u30fc\u30d0\u304c\u6b62\u307e\u3063\u3066\u3057\u307e\u3046\u3002\u3053\u306e\u3088\u3046\u306a\u5927\u91cf\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u53d7\u3051\u3066\u7b54\u3048\u308b\u308f\u3051\u306b\u306f\u3044\u304b\u306a\u3044\u306e\u3067\u3001\u666e\u901a\u3001\u3069\u3093\u306aDNS\u30b5\u30fc\u30d0\u3082\u81ea\u5206\u306e\u3068\u3053\u3060\u3051\u3000\u3068\u5fdc\u3058\u308b\u7bc4\u56f2\u3092\u9650\u5b9a\u3057\u3066\u3044\u308b\u3002\u3057\u304b\u3057\u3001\u3053\u306e\u9650\u5b9a\u304c\u3067\u304d\u3066\u3044\u306a\u3044\u30eb\u30fc\u30bf\u30fb\u30b5\u30fc\u30d0\u304c\u3042\u308b\u308f\u3051\u3067\u3001\u3053\u308c\u3092 Open Resolver \u554f\u984c\u3068\u3044\u3046\u3002\u5e83\u304f\u8ab0\u304b\u3089\uff08Open\uff09\u306e\u8981\u6c42\u3067\u3082\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\u3068ip address \u306e\u5bfe\u5fdc\u3092\u89e3\u6c7a\uff08Resolve\uff09\u3057\u3066\u3042\u3052\u307e\u3059\u3088\u3068\u3044\u3046\u308f\u3051\u3060\u3002
\n\u3053\u306eDNS\u30b5\u30fc\u30d0\u304c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u76f4\u63a5\u63a5\u7d9a\u3057\u3066\u3044\u3066\u3001\u81ea\u7531\u306b\u554f\u3044\u5408\u308f\u305b\u3092\u53d7\u3051\u4ed8\u3051\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u3068\u3001\u5927\u91cf\u306e\u554f\u3044\u5408\u308f\u305b\u304c\u5408\u3063\u305f\u5834\u5408\u3001\u81ea\u5206\u3067\u89e3\u6c7a\u3067\u304d\u306a\u3044\u8981\u6c42\u306f\u3001\u3088\u308a\u4e0a\u4f4d\u306eDNS\u30b5\u30fc\u30d0\u306b\u554f\u3044\u5408\u308f\u305b\u306b\u884c\u304f\u3057\u3001\u672c\u6765\u306e\u81ea\u5206\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u306b\u7b54\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u304f\u306a\u3063\u3066\u3057\u307e\u3046\u3002\u30a6\u30a4\u30eb\u30b9\u304c\u3053\u308c\u3092\u5229\u7528\u3057\u3066\u5927\u91cf\u306eDNS\u8981\u6c42\u30d1\u30b1\u30c3\u30c8\u3092\u9001\u308a\u3060\u3059\u306e\u304cDos\u653b\u6483\u3068\u3044\u3046\u308f\u3051\u3060\u3002\u30a6\u30a4\u30eb\u30b9\u304c\u7279\u5b9a\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u3092\u4f7f\u3048\u306a\u304f\u3057\u3066\u3057\u307e\u3046\u306e\u3060\u3002\u3060\u304b\u3089\u3001\u3053\u308c\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u30b5\u30a4\u30c8\u304c\u4f5c\u3089\u308c\u3066\u3044\u308b\u3002\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u78ba\u8a8d\u30b5\u30a4\u30c8<\/a>\u306a\u3093\u304b\u3060\u3002\u3057\u304b\u3057\u3001\u5f53\u7136\u306a\u304c\u3089\u30a4\u30f3\u30c8\u30e9\u30cd\u30c3\u30c8\u5185\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30fb\u30a2\u30c9\u30ec\u30b9\u306eDNS\u30b5\u30fc\u30d0\u306b\u306f\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u3002
\n\u554f\u984c\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u30eb\u30fc\u30bf\u304c\u30a4\u30f3\u30c8\u30e9\u30cd\u30c3\u30c8\u306b\u3042\u3063\u3066\u3001\u305d\u306e\u30a4\u30f3\u30c8\u30e9\u30cd\u30c3\u30c8\u5185\u306b\u30a6\u30a4\u30eb\u30b9\u306b\u611f\u67d3\u3057\u305fPC\u304c\u3042\u3063\u3066\u3053\u306e\u30eb\u30fc\u30bf\u3092\u6a19\u7684\u306b\u3057\u305f\u3068\u304d\u3060\u3002\u3053\u306e\u30eb\u30fc\u30bf\u306e\u4e0b\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u306f\u30eb\u30fc\u30bf\u304c\u4e00\u676f\u4e00\u676f\u306a\u306e\u3067\u3001\u306a\u304b\u306a\u304b\u30cd\u30c3\u30c8\u306b\u7e4b\u304c\u3089\u306a\u3044\u3053\u3068\u306b\u306a\u308b\u3002\u3055\u3089\u306b\u3053\u306e\u30eb\u30fc\u30bf\u306f\u4e0a\u6d41\u306eDNS\u30b5\u30fc\u30d0\u306b\u7121\u99c4\u306a\u5927\u91cf\u306e\u554f\u3044\u5408\u308f\u305b\u3092\u884c\u3046\u306e\u3067\u3001\u30a4\u30f3\u30c8\u30e9\u30cd\u30c3\u30c8\u5168\u4f53\u306e\u30b9\u30d4\u30fc\u30c9\u304c\u843d\u3061\u3066\u3057\u307e\u3046\u3002\u5916\u306b\u306f\u5168\u304f\u5f71\u97ff\u304c\u306a\u3044\u3002\u81ea\u5206\u306e\u3068\u3053\u3060\u3051\u304c\u88ab\u5bb3\u3092\u88ab\u308b\u308f\u3051\u3060\u3002
\n\u3069\u3046\u3084\u3089\u3001\u3053\u306e\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u3088\u3046\u3060\u3002\u3064\u3089\u3044\u306e\u306f\u3001\u30eb\u30fc\u30bf\u3092\u81ea\u7531\u306b\u5c0e\u5165\u3057\u3066\u3044\u3044\u3068\u3057\u3066\u3044\u3066\u3001\u3060\u308c\u304c\u3069\u306eip address \uff08\u3082\u3061\u308d\u3093\u3000private\u3060\uff09\u3092\u4f7f\u3063\u3066\u3044\u308b\u306e\u304b\u628a\u63e1\u3067\u304d\u3066\u3044\u306a\u3044\u3053\u3068\u3060\u3002\u4f01\u696d\u3067\u306f\u306a\u304f\u5927\u5b66\u3060\u304b\u3089\u306a\u3002\u30e6\u30fc\u30b6\u304c\u52dd\u624b\u306b\u5c0e\u5165\u3057\u305f\u30eb\u30fc\u30bf\u304copen resolver \u554f\u984c\u3092\u89e3\u6c7a\u3067\u304d\u3066\u3044\u306a\u3044\u3068\u3059\u308b\u3068\u30fc\u30fc\u3061\u3087\u3063\u3068\u524d\u306e\u30eb\u30fc\u30bf\uff08\u7121\u7ddaAP\uff09\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u5bfe\u7b56\u3055\u308c\u3066\u3044\u306a\u3044\u2015\u2015\u305d\u3057\u3066\u3001\u3069\u3063\u304b\u306ePC\u304c\u3000Dos\u653b\u6483\u30a6\u30a4\u30eb\u30b9\u3092\u6301\u3063\u3066\u3044\u3066\u3001\u3053\u306e\u30eb\u30fc\u30bf\u3092\u653b\u6483\u3057\u3066\u3044\u308b\u3089\u3057\u3044\u306e\u3060\u3002
\n\u2606\u3000open resolver\u3000\u554f\u984c\u3092\u62b1\u3048\u3066\u3044\u308b\u30eb\u30fc\u30bf\u3092\u6392\u9664\u3059\u308b\u3002
\n\u2606\u3000\u30a6\u30a4\u30eb\u30b9\u611f\u67d3PC\u3092\u63a2\u3057\u3060\u3059
\n\u304c\u5bfe\u7b56\u306a\u306e\u3060\u304c\u3001\u30eb\u30fc\u30bf\u306eip address \u304c\u308f\u304b\u3089\u306a\u3044\u3002\u3088\u308f\u3063\u305f\u3002\u611f\u67d3\u3057\u3066\u3044\u308bPC\u3092\u63a2\u3059\u306e\u306f\u3082\u3063\u3068\u5927\u5909\u3060\u3002
\n\u3082\u3057ip address \u304c\u308f\u304b\u3063\u305f\u3089\u3000nslookup \u3067\u8abf\u3079\u308b\u65b9\u6cd5\u3002
\n\u554f\u984c\u306e\u30eb\u30fc\u30bf\u306eWAN \u5074\u3067\u4f7f\u3063\u3066\u3044\u308b\u3000ip address \u304c\u308f\u304b\u3063\u305f\u3068\u304d\u3001\u305d\u3057\u3066
\n192.168.123.123 \u3060\u3063\u305f\u3068\u3059\u308b\u3002<\/p>\n

$ nslookup\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000 #\u3068\u5165\u529b\u3059\u308b\u3068 >\u30d7\u30ed\u30f3\u30d7\u30c8\u306b\u306a\u308b\u304b\u3089
\n> server 192.168.123.123\u3000\u3000\u3000\u3000#\u3068\u5165\u529b\u3059\u308b\u3068
\nDefault server: 192.168.123.123
\nAddress: 192.168.123.123#53
\n> set type=ANY\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000#\u3068\u5165\u529b\u3057
\n> google.com\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000#google\u3092\u89e3\u3044\u3066\u3082\u3089\u3046\u3068
\n;; connection timed out; no servers could be reached
\n>
\n\u3068\u306a\u3063\u305f\u3089\u3001\u30eb\u30fc\u30bf\u306e\u5916\u304b\u3089DNS\u306e\u554f\u3044\u5408\u305b\u304c\u3042\u3063\u3066\u3082\u7b54\u3048\u306a\u3044\u3068\u3044\u3046\u3053\u3068
\n\u306b\u306a\u308b\u3002\u3053\u308c\u304c\u6b63\u5e38\u3002
\n\u3082\u3057\u4e0b\u8a18\u306e\u3088\u3046\u306b google.com \u306eip address \u304c\u5e30\u3063\u3066\u304d\u305f\u3089\u30aa\u30fc\u30d7\u30f3\u30ea\u30be
\n\u30eb\u30d0\u306b\u306a\u3063\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u3060\u3002
\n\u30eb\u30fc\u30bf\u306e\u4e0b\uff08\u5185\u90e8\uff09\u304b\u3089\u3001\u540c\u3058\u3053\u3068\u3092\u884c\u3046\u3068
\n$ nslookup\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000#\u3068\u5165\u529b\u3059\u308b\u3068 >\u30d7\u30ed\u30f3\u30d7\u30c8\u306b\u306a\u308b\u304b\u3089
\n> server 1192.168.123.123\u3000\u3000\u3000\u3000#\u3068\u5165\u529b\u3059\u308b\u3068
\nDefault server: 192.168.123.123
\nAddress: 192.168.123.123#53
\n> set type=ANY\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000#\u3068\u5165\u529b\u3057
\n> google.com\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000#google\u3092\u89e3\u3044\u3066\u3082\u3089\u3046\u3068
\nNon-authoritative answer:
\nName: google.com
\nAddress: 216.58.220.238
\ngoogle.com nameserver = ns4.google.com.
\n\u7565
\nns1.google.com internet address = 216.239.32.10
\n>
\n\u3068\u306a\u3063\u3066google \u306eip address \u3092\u89e3\u3044\u3066\u304f\u308c\u308b\u3002\u3064\u307e\u308a\u3001\u30eb\u30fc\u30bf\u306e\u5185\u90e8\u304b\u3089
\n\u306fDNS\u554f\u3044\u5408\u305b\u306b\u5fdc\u3058\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308b\u3002\uff08\u3082\u3057\u3001\u3053\u3046\u3067\u306a\u304b\u3063\u305f\u3089\u3001\u3053\u306e
\n\u30eb\u30fc\u30bf\u306e\u4e0b\u3067\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u304c\u3067\u304d\u306a\u3044\u304b\u3089\u3001\u52d5\u3044\u3066\u3044\u308b\u30eb\u30fc\u30bf\u306a\u3093
\n\u3060\u3089\u3053\u3046\u306a\u3089\u306a\u3044\u308f\u3051\u304c\u306a\u3044\uff09\u3002
\n> \u30d7\u30ed\u30f3\u30d7\u30c8\u306e\u5f8c\u306b\u3000exit \u3068\u5165\u529b\u3057\u3066 nslookup \u3092\u7d42\u4e86\u3059\u308b\u3002<\/p><\/blockquote>\n

dig \u3092\u4f7f\u3046\u5834\u5408<\/p>\n

$ dig @192.168.123.123 google.com ANY
\n; <<>> DiG 9.8.3-P1 <<>> @192.168.123.123 google.com ANY
\n; (1 server found)
\n;; global options: +cmd
\n;; Got answer:
\n;; ->>HEADER< ;; flags: qr rd ra; QUERY: 1, ANSWER: 11, AUTHORITY: 0, ADDITIONAL: 4
\n;; QUESTION SECTION:
\n;google.com. IN ANY
\n;; ANSWER SECTION:
\ngoogle.com. 211 IN A 216.58.220.238
\ngoogle.com. 5715 IN NS ns4.google.com.
\n\u7565
\nns3.google.com. 5714 IN A 216.239.36.10
\nns1.google.com. 5714 IN A 216.239.32.10
\n;; Query time: 57 msec
\n;; SERVER: 192.168.246.67#53(192.168.246.67)
\n;; WHEN: Tue Oct 27 14:16:05 2015
\n;; MSG SIZE rcvd: 378
\n$<\/p><\/blockquote>\n

\u3060\u3063\u305f\u3089\u554f\u3044\u5408\u308f\u305b\u306b\u7b54\u3048\u305f\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308b\u3002<\/p>\n

$ dig @192.168.123.123 google.com ANY
\n; < <>> DiG 9.8.3-P1 < <>> @192.168.123.123 google.com ANY
\n; (1 server found)
\n;; global options: +cmd
\n;; connection timed out; no servers could be reached
\n$<\/p><\/blockquote>\n

\u306fDNS\u554f\u3044\u5408\u308f\u305b\u306b\u7b54\u3048\u306a\u304b\u3063\u305f\u5834\u5408\u3060\u3002
\nip address \u304c\u308f\u304b\u3063\u3066\u306a\u3044\u3068\u5927\u5909\u3060\u3002Win\u3067EXPing.exe \u4f7f\u3063\u3066\u3001\u305d\u306e\u30bb\u30b0\u30e1\u30f3\u30c8\u3067\u5229\u7528\u3055\u308c\u3066\u3044\u308bip address \u3092\u63a2\u3057\u3001\u305d\u306e\u307b\u3068\u3093\u3069\u304c\u30d1\u30bd\u30b3\u30f3\u304b\u30d7\u30ea\u30f3\u30bf\u306a\u3093\u3060\u3051\u3069\u3001\u4e0a\u8a18\u306e\u30b3\u30de\u30f3\u30c9\u3092\u6253\u3063\u3066\u898b\u308b\u3002\u306a\u3093\u3066\u3084\u3063\u3066\u3089\u308c\u306a\u3044\u306a\u3002
\n\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u4f5c\u3063\u3066…. \u00a0\u3069\u3063\u304b\u306b\u306a\u3044\u304b\u306a\uff1f\u9762\u5012\u3060\u3002
\n\u6559\u3048\u3066\u3082\u3089\u3063\u305f\u3002\u691c\u7d22\u7bc4\u56f2\u3092192.168.100.0. \u306e\u30cd\u30c3\u30c8\u3060\u3068\u3059\u308b\u3068<\/p>\n

\n#!\/bin\/sh
\nfor i in `seq 1 253`
\ndo
\n\techo “dig @192.168.100.$i google.com”
\n\techo “dig @192.168.100.$i google.com” >> result
\n\tdig +time=3 +trie=1 @192.168.100.$i google.com >> result
\ndone\n<\/p><\/blockquote>\n

\u3092Mac\u306e\u30bf\u30fc\u30df\u30ca\u30eb\u3067\u5b9f\u884c\u3059\u308b\u3068\u3001<\/p>\n

\n$ for i in `seq 1 253`
\n> do
\n> echo “dig @192.168.100.$i google.com”
\n> echo “dig @192.168.100.$i google.com” >> result
\n> dig +time=3 +trie=1 @192.168.100.$i google.com >> result
\n> done\n<\/p><\/blockquote>\n

\u3067\u6b62\u307e\u308b\u304b\u3089\u3000\u30a8\u30f3\u30bf\u30fc\u30ad\u30fc\u3092\u62bc\u3059\u3068<\/p>\n

\ndig @192.168.100.1 google.com
\ndig @192.168.100.2 google.com
\n….
\ndig @192.168.100.253 google.com
\n$\n<\/p><\/blockquote>\n

\u3068\u7d04\uff13\u79d2\u3054\u3068\u306b\u3001\u5bfe\u8c61ip address \u3092\uff11\u3064\u3065\u3064\u5897\u52a0\u3055\u305b\u3066dig \u3092\u5b9f\u884c\u3057\u3066\u3044\u304f\u3002
\n\u7d50\u679c\u306f\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u306b\u3000result \u3068\u3044\u3046\u540d\u524d\u306e\u30d5\u30a1\u30a4\u30eb\u3067\u4fdd\u5b58\u3055\u308c\u308b\u3002<\/p>\n

\ndig @192.168.100.55 google.com
\n; < <>> DiG 9.8.3-P1 < <>> +time=3 +trie=1 @192.168.100.55 google.com
\n; (1 server found)
\n;; global options: +cmd
\n;; connection timed out; no servers could be reached\n<\/p><\/blockquote>\n

\u3068\u3042\u308c\u3070192.168.100.55\u306fDNS\u3092\u3084\u3063\u3066\u306a\u3044\u3088\u3002<\/p>\n

\ndig @192.168.100.56 google.com
\n; < <>> DiG 9.8.3-P1 < <>> +time=3 +trie=1 @192.168.100.56 google.com
\n; (1 server found)
\n;; global options: +cmd
\n;; Got answer:
\n;; ->>HEADER< <- opcode: QUERY, status: NOERROR, id: 25178\n;; flags: qr rd ra; QUERY: 1, ANSWER: 11, AUTHORITY: 0, ADDITIONAL: 0\n;; QUESTION SECTION:\n;google.com.\t\t\tIN\tA\n;; ANSWER SECTION:\ngoogle.com.\t\t299\tIN\tA\t173.194.117.225\ngoogle.com.\t\t299\tIN\tA\t173.194.117.227\ngoogle.com.\t\t299\tIN\tA\t173.194.117.224\ngoogle.com.\t\t299\tIN\tA\t173.194.117.230\ngoogle.com.\t\t299\tIN\tA\t173.194.117.232\ngoogle.com.\t\t299\tIN\tA\t173.194.117.229\ngoogle.com.\t\t299\tIN\tA\t173.194.117.226\ngoogle.com.\t\t299\tIN\tA\t173.194.117.228\ngoogle.com.\t\t299\tIN\tA\t173.194.117.231\ngoogle.com.\t\t299\tIN\tA\t173.194.117.233\ngoogle.com.\t\t299\tIN\tA\t173.194.117.238\n;; Query time: 59 msec\n;; SERVER: 192.168.100.56#53(192.168.100.56)\n;; WHEN: Thu Oct 29 15:04:04 2015\n;; MSG SIZE rcvd: 204\n<\/p><\/blockquote>\n

\u3068\u3042\u308c\u3070192.168.100.56\u306fDNS\u3092\u3084\u3063\u3066\u3044\u308b\u3088\u3068\u3044\u3046\u308f\u3051\u3060\u3002
\n\u30eb\u30fc\u30bf\u306eWAN\u5074\u306e\u30cd\u30c3\u30c8\u3067\u5b9f\u65bd\u3059\u308c\u3070\u3001\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u306b\u306a\u3063\u3066\u3044\u308b\u30eb\u30fc\u30bf\u306e\u691c\u51fa\u304c\u3067\u304d\u308b\u308f\u3051\u3060\u3002\u30eb\u30fc\u30bf\u306e\u3057\u305f\uff08\u5185\u5074\uff09\u3067\u306fDNS\u30b5\u30fc\u30d3\u30b9\u3092\u884c\u3046\u306e\u304c\u5f53\u7136\u3060\u304b\u3089DNS\u30b5\u30fc\u30d3\u30b9\u3092\u3084\u3063\u3066\u3044\u308b\u3068\u3044\u3046\u5fdc\u7b54\u3067\u554f\u984c\u306a\u3044\u304c\u3001\u540c\u3058ip address \u306e\u30eb\u30fc\u30bf\u304cWAN\u5074\u304b\u3089\u30a2\u30af\u30bb\u30b9\u3057\u3066DNS\u3092\u3084\u3063\u3066\u3044\u308b\u3068\u3046\u306e\u306fopen resolver \u3067\u307e\u305a\u3044\u308f\u3051\u3060\u3002
\ndig +time=3 +trie=1 @192.168.100.$i google.com
\n—–
\n\u306e\u3088\u3046\u306b\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u30bf\u30a4\u30e0\u30a2\u30a6\u30c83\u79d2\u30671\u56de\u306e\u307f\u8a66\u884c\u3068\u306a\u308a\u3001\u8abf\u67fb\u306e\u6642\u9593\u304c\u77ed\u7e2e\u3067\u304d\u308b\uff08\u4e00\u822c\u7684\u306a\u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u30bf\u30a4\u30e0\u30a2\u30a6\u30c85\u79d2\u306e3\u56de\u8a66\u884c\u3060\uff09\u3002
\n\u76f8\u624b\u5074\u304c\u91cd\u304f\u306a\u3063\u3066\u3044\u308b\u3068\u5fdc\u7b54\u306b\u6642\u9593\u304c\u304b\u304b\u308b\u3053\u3068\u304c\u3042\u308b\u306e\u3067\u3001\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306f\u5c11\u3057\u9577\u3081\u304c\u3044\u3044\u3002
\n—–<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"

\t\t\t\t\t\t<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-6841","post","type-post","status-publish","format-standard","hentry","category-3"],"_links":{"self":[{"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/posts\/6841","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6841"}],"version-history":[{"count":1,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/posts\/6841\/revisions"}],"predecessor-version":[{"id":21200,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/posts\/6841\/revisions\/21200"}],"wp:attachment":[{"href":"https:\/\/nbsigh2.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6841"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6841"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6841"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}