{"id":1606,"date":"2013-04-15T21:12:26","date_gmt":"2013-04-15T12:12:26","guid":{"rendered":"http:\/\/wp.kaz.bz\/tech\/?p=1606"},"modified":"2013-08-20T17:58:00","modified_gmt":"2013-08-20T08:58:00","slug":"1606","status":"publish","type":"post","link":"https:\/\/wp.kaz.bz\/tech\/2013\/04\/15\/1606.html","title":{"rendered":"DNS\u30b5\u30fc\u30d0\u306e\u5909\u66f4\u306e\u969b\u306e\u624b\u9806\u3002"},"content":{"rendered":"<p>\u3044\u308f\u3086\u308b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3067\u3001\u3042\u308b\u30c9\u30e1\u30a4\u30f3\u540d\u306eDNS\u30b5\u30fc\u30d0\u3092\u5225\u306e\u30b5\u30fc\u30d0\u306b\u5909\u66f4\uff08\u79fb\u884c\uff09\u3059\u308b\u969b\u306e\u6ce8\u610f\u4e8b\u9805\u3084\u3089\u624b\u9806\u3084\u3089\u3002<br \/>\n\u203bDNS\u306b\u3064\u3044\u3066\u306f\u3001\u69d8\u3005\u7406\u89e3\u3059\u3079\u304d\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u305c\u3072\u3053\u3061\u3089\u3082\u3054\u89a7\u304f\u3060\u3055\u3044\u2192 <a href=\"http:\/\/wp.kaz.bz\/tech\/etc\/dns-1\" title=\"DNS\u306b\u3064\u3044\u3066\u3002\" class=\"local-link\">DNS\u306b\u3064\u3044\u3066\u3002<\/a><\/p>\n<h3>\u524d\u63d0\u306a\u3069<\/h3>\n<p>[note]<br \/>\n\u4f8b\u3068\u3057\u3066\u4e0b\u8a18\u3092\u524d\u63d0\u3068\u3057\u3066\u66f8\u304d\u307e\u3059\u3002<\/p>\n<dl>\n<dt>\u5bfe\u8c61\u306e\u30c9\u30e1\u30a4\u30f3\u540d<\/dt>\n<dd>example.com<\/dd>\n<dt>\u73fe\u5728\u306eDNS\u30b5\u30fc\u30d0<br \/><span style=\"font-size:0.70em\">\u30db\u30b9\u30c8\u540d\uff08IP\u30a2\u30c9\u30ec\u30b9\uff09<\/span><\/dt>\n<dd>\n<ul>\n<li>ns01.example.com\uff08aaa.aaa.aaa.aaa\uff09<\/li>\n<li>ns02.example.com\uff08bbb.bbb.bbb.bbb\uff09<\/li>\n<\/ul>\n<\/dd>\n<dt>\u5909\u66f4\u5f8c\u306eDNS\u30b5\u30fc\u30d0<br \/><span style=\"font-size:0.70em\">\u30db\u30b9\u30c8\u540d\uff08IP\u30a2\u30c9\u30ec\u30b9\uff09<\/span><\/dt>\n<dd>\n<ul>\n<li>ns11.example.com\uff08xxx.xxx.xxx.xxx\uff09<\/li>\n<li>ns12.example.com\uff08yyy.yyy.yyy.yyy\uff09<\/li>\n<\/ul>\n<\/dd>\n<\/dl>\n<p>[\/note]<\/p>\n<p>[note]<br \/>\n\u3053\u306e\u8a18\u4e8b\u3067\u8a00\u3046\u300cDNS\u30b5\u30fc\u30d0\u300d\u306f\u3044\u308f\u3086\u308b\u300c\u6a29\u5a01\u30b5\u30fc\u30d0\u300d\u3067\u3059\u3002<br \/>\n\u300c\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u300d\u3068\u540c\u7fa9\u3068\u3057\u3066\u4e0b\u8a18\u306f\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>[\u8ffd\u8a18 2013.08.20.]<br \/>\n\u300c\u30c9\u30e1\u30a4\u30f3\u300d\u3068\u300c\u30be\u30fc\u30f3\u300d\u3068\u3044\u3046\u7528\u8a9e\u304c\u6df7\u5728\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u3053\u306e\u8a18\u4e8b\u5185\u3067\u306f\u307b\u307c\u540c\u7fa9\u3068\u8003\u3048\u3066\u3044\u305f\u3060\u3044\u3066\u3044\u3044\u3068\u601d\u3044\u307e\u3059\u3002<br \/>\n\u305f\u3060\u3057\u672c\u6765\u306f\u5225\u7269\u3067\u3059\u3002<br \/>\nexample.com \u3068 sub.example.com \u306f\u89aa\u5b50\u95a2\u4fc2\u306b\u3042\u308b\u300c\u5225\u306e\u30c9\u30e1\u30a4\u30f3\u300d\u3067\u3059\u3002<br \/>\n\u30be\u30fc\u30f3\u306f\u540c\u4e00\u306eDNS\u30b5\u30fc\u30d0\u3067\u7ba1\u7406\u3059\u308b1\u30bb\u30b0\u30e1\u30f3\u30c8\u3067\u3042\u308a\u3001\u305d\u306e\u30be\u30fc\u30f3\u5185\u306b\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306a\u3069\u3092\u542b\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3082\u306e\u3067\u3059\u3002<br \/>\n\u79fb\u8b72\u3092\u3059\u308b\u5834\u5408\u306b\u5225\u30be\u30fc\u30f3\u304c\u767a\u751f\u3057\u307e\u3059\u3002<br \/>\n[\/\u8ffd\u8a18]<br \/>\n[\/note]<\/p>\n<h3>DNS\u30b5\u30fc\u30d0\uff08\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\uff09\u306e\u5909\u66f4\u306e\u610f\u5473<\/h3>\n<p>\n\u300cDNS\u30b5\u30fc\u30d0\uff08\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\uff09\u3092\u5909\u66f4\u3059\u308b\u300d<br \/>\n\uff1d<br \/>\n\u300c\u4e0a\u4f4dDNS\u30b5\u30fc\u30d0\u3067\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u306b\u5bfe\u3057\u3066\u767b\u9332\u3055\u308c\u3066\u3044\u308bNS\u30ec\u30b3\u30fc\u30c9\u3001A\u30ec\u30b3\u30fc\u30c9\uff08\u30b0\u30eb\u30fc\u30ec\u30b3\u30fc\u30c9\uff09\u3092\u5909\u66f4\u3059\u308b\u300d<br \/>\n\uff1d<br \/>\n\u300c\u30ec\u30b8\u30b9\u30c8\u30e9\u306e\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u767b\u9332\u3092\u5909\u66f4\u3059\u308b\u300d<\/p>\n<p>\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<br \/>\n\u30a4\u30e1\u30fc\u30b8\u3067\u8a00\u3048\u3070\u4e0a\u4f4dDNS\u30b5\u30fc\u30d0\u306e\u30be\u30fc\u30f3\u30d5\u30a1\u30a4\u30eb\u306e<\/p>\n<pre class=\"brush:plain\">\r\n@example.com\r\n       IN    NS    ns01\r\n       IN    NS    ns02\r\nns01   IN    A     aaa.aaa.aaa.aaa\r\nns02   IN    A     bbb.bbb.bbb.bbb\r\n<\/pre>\n<p>\u3092<\/p>\n<pre class=\"brush:plain\">\r\n@example.com\r\n       IN    NS    ns11\r\n       IN    NS    ns12\r\nns11   IN    A     xxx.xxx.xxx.xxx\r\nns12   IN    A     yyy.yyy.yyy.yyy\r\n<\/pre>\n<p>\u306b\u3059\u308b\u3001\u3068\u3044\u3046\u3053\u3068\u3002<\/p>\n<p>[note]<br \/>\n\u3053\u306e\u4e0a\u4f4dDNS\u30b5\u30fc\u30d0\u306e\u30be\u30fc\u30f3\u30d5\u30a1\u30a4\u30eb\u3092\u66f8\u304d\u63db\u3048\u308b\u6a29\u9650\u3092\u6301\u3063\u3066\u3044\u308b\u306e\u304c\u300c\u30ec\u30b8\u30b9\u30c8\u30e9\u300d\u3067\u3059\u3002<br \/>\n\u4e0a\u4f4dDNS\u30b5\u30fc\u30d0\u306e\u7ba1\u7406\u8cac\u4efb\u3092\u6301\u3063\u3066\u3044\u308b\u306e\u304c\u300c\u30ec\u30b8\u30b9\u30c8\u30ea\u300d\u3067\u3059\u3002<br \/>\n[\/note]\n<\/p>\n<h3>DNS\u30b5\u30fc\u30d0\u306e\u5909\u66f4\u304c\u5b8c\u4e86\u3057\u305f\u3001\u3068\u8a00\u3046\u72b6\u614b<\/h3>\n<p>DNS\u30b5\u30fc\u30d0\u306f\u3069\u3053\u304b\u306b\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u307f\u306b\u884c\u304f\u3088\u3046\u306a\u4ed5\u7d44\u307f\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u4e16\u306e\u4e2d\u306e\u7aef\u672b\u304b\u3089example.com\u30c9\u30e1\u30a4\u30f3\u306e\u540d\u524d\u89e3\u6c7a\u306e\u969b\u306b ns11.example.com \/ ns12.example.com \u3092\u898b\u306b\u304d\u3066\u3082\u3089\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u3053\u3068\u304c\u300c\u5909\u66f4\u304c\u5b8c\u4e86\u3057\u305f\u300d\u72b6\u614b\u3068\u8a00\u3048\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u305f\u3081\u306b\u306f\u4ee5\u4e0b\u306e\u6761\u4ef6\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u30eb\u30fc\u30c8DNS\u30b5\u30fc\u30d0\u3001\u307e\u305f\u306f\u30eb\u30fc\u30c8DNS\u30b5\u30fc\u30d0\u304b\u3089\u9069\u5207\u306b\u79fb\u8b72\u3055\u308c\u3066\u3044\u308b\u4e0a\u4f4dDNS\u30b5\u30fc\u30d0\u306b\u3042\u308b\u5bfe\u8c61\u30c9\u30e1\u30a4\u30f3\u306e\u30be\u30fc\u30f3\u60c5\u5831\u304c\u9069\u5207\u306b\u66f8\u304d\u63db\u308f\u308b\u3053\u3068\u3002\uff08\uff1d\u300cDNS\u30b5\u30fc\u30d0\uff08\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\uff09\u306e\u5909\u66f4\u306e\u610f\u5473\u300d\u3067\u8ff0\u3079\u305f\u72b6\u614b\u306b\u306a\u308b\u3053\u3068\uff09\n<\/li>\n<li>\u904e\u53bb\u306b example.com \u30c9\u30e1\u30a4\u30f3\u306b\u5bfe\u3059\u308b\u540d\u524d\u89e3\u6c7a\u3092\u3057\u305f\u3053\u3068\u304c\u3042\u308b\u7aef\u672b\u3084\u305d\u306e\u7aef\u672b\u306b\u8a2d\u5b9a\u3057\u3066\u3042\u308b\u30ea\u30be\u30eb\u30d0\uff08Windows\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u3067\u3044\u3046\u300cDNS\u30b5\u30fc\u30d0\u300d\uff09\u306b\u3042\u308b\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6709\u52b9\u671f\u9650\u304c\u5207\u308c\u308b\u3053\u3068\u3002\n<\/li>\n<\/ol>\n<p>1. \u306e\u72b6\u614b\u306b\u306a\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u4e16\u306e\u4e2d\u306e\u7aef\u672b\u304c example.com \u3092\u540d\u524d\u89e3\u6c7a\u3057\u3088\u3046\u3068\u3057\u305f\u969b\u306b\u53c2\u7167\u3059\u308bDNS\u30b5\u30fc\u30d0\u304c\u5909\u66f4\u3055\u308c\u305f\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n2. \u306b\u3088\u3063\u3066\u3001\u4e16\u306e\u4e2d\u306e\u7aef\u672b\u304c\u4e00\u5ea6\u691c\u7d22\u3057\u305f\u7d50\u679c\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5229\u7528\u305b\u305a\u3001\u6539\u3081\u3066\u540d\u524d\u89e3\u6c7a\u3092\u884c\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u305d\u306e\u969b\u306f1. \u306b\u3088\u3063\u3066\u5909\u66f4\u5f8c\u306eDNS\u30b5\u30fc\u30d0\u306b\u5bfe\u3057\u540d\u524d\u89e3\u6c7a\u3092\u884c\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\n<\/p>\n<h3>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6709\u52b9\u671f\u9650<\/h3>\n<p>\u4e0a\u8a18 2. \u306e\u5404\u7aef\u672b\u306b\u3042\u308b\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6709\u52b9\u671f\u9650\u306f\u3001\u305d\u306e\u540d\u524d\u89e3\u6c7a\u3092\u884c\u3063\u305f\u6642\u70b9\u306e TTL \u3067\u3059\u3002<br \/>\n\u4eee\u306b TTL \u304c1\u65e5\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u540d\u306b\u5bfe\u3057\u3066\u540d\u524d\u89e3\u6c7a\u3092\u884c\u3063\u305f\u5834\u5408\u3001\u305d\u306e\u6642\u70b9\u304b\u30891\u65e5\u306e\u9593\u3001\u6539\u3081\u3066\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u306eDNS\u30b5\u30fc\u30d0\u306b\u540d\u524d\u89e3\u6c7a\u3092\u884c\u3046\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\uff08\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u524a\u9664\u3057\u306a\u3044\u9650\u308a\uff09\u3002<\/p>\n<p>\u3064\u307e\u308a\u3001\u5909\u66f4\u3092\u884c\u3046\u76f4\u524d\u306b example.com \u30c9\u30e1\u30a4\u30f3\u3092\u540d\u524d\u89e3\u6c7a\u3057\u305f\u7aef\u672b\u304c\u5909\u66f4\u5f8c\u306eDNS\u30b5\u30fc\u30d0\u306b\u554f\u3044\u5408\u308f\u305b\u308b\u306e\u306f\u3001\u5909\u66f4\u524d\u306eDNS\u30b5\u30fc\u30d0\u3067\u6307\u5b9a\u3055\u308c\u3066\u3044\u305f TTL \u306e\u7d4c\u904e\u5f8c\u3067\u3059\u3002<\/p>\n<p>[warning]<br \/>\n\u300c\u6d78\u900f\u3057\u306a\u3044\u300d\u3068\u8a00\u3063\u3066\u3044\u308b\u307f\u306a\u3055\u3093\u3001\u307b\u3068\u3093\u3069\u306e\u539f\u56e0\u306f\u3053\u3053\u3092\u7406\u89e3\u3067\u304d\u3066\u3044\u306a\u3044\u3053\u3068\u3060\u3068\u601d\u3044\u307e\u3059\u3088\u3002<br \/>\n\u30b7\u30b9\u30c6\u30e0\u306f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u306b\u52d5\u304d\u307e\u3059\u3002<br \/>\n\uff08\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u306b\u52d5\u304b\u306a\u3044\u306e\u306f\u57fa\u672c\u7684\u306b\u300c\u4e0d\u5177\u5408\u300d\u300c\u30d0\u30b0\u300d\u3067\u3059\uff09\u3002<br \/>\n[\/warning]<\/p>\n<p>[tip]<br \/>\n\u5b9f\u969b\u306b\u306f\u3001TTL\u306f\u30c9\u30e1\u30a4\u30f3\uff08\u30be\u30fc\u30f3\uff09\u5358\u4f4d\u3067\u306f\u306a\u304f\u3001\u30ec\u30b3\u30fc\u30c9\u5358\u4f4d\u3067\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<br \/>\nDNS\u30b5\u30fc\u30d0\u306e\u5909\u66f4\u3067\u306f\u306a\u304f\u30ec\u30b3\u30fc\u30c9\u5358\u4f4d\u306e\u5909\u66f4\uff08IP\u30a2\u30c9\u30ec\u30b9\u306e\u5909\u66f4\u306a\u3069\uff09\u306e\u969b\u306b\u65b0\u3057\u3044\u8a2d\u5b9a\u304c\u4e16\u306e\u4e2d\u306b\u53c2\u7167\u3055\u308c\u308b\u307e\u3067\u306e\u6642\u9593\u3082\u3001\u540c\u3058\u7406\u7531\u3067\u8aac\u660e\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3055\u3089\u306b\u30cd\u30ac\u30c6\u30a3\u30d6\u30ad\u30e3\u30c3\u30b7\u30e5\u306a\u3069\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u4eca\u56de\u306f\u5272\u611b\u3057\u307e\u3059\u3002<br \/>\n[\/tip]\n<\/p>\n<h3>\uff08\u9577\u3044\u524d\u7f6e\u304d\u306e\u5f8c\uff09\u5b9f\u969b\u306e\u624b\u9806<\/h3>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u6d41\u308c\u3067\u4f5c\u696d\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u3010TTL\u3092\u77ed\u304f\u5909\u66f4\u3011<br \/>\nns01.example.com, ns02.example.com \u3067\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bTTL\uff08\u4eee\u306b1\u65e5=86400\u79d2\uff09\u3092\u3001\u77ed\u3044\u6642\u9593\uff08\u4f8b\u3048\u3070 5\u5206=300\u79d2\uff09\u306b\u5909\u66f4\u3002<\/li>\n<li>\u5143\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u305fTTL\uff081\u65e5\uff09\u4ee5\u4e0a\u5f85\u3064\u3002<br \/>\n\u3053\u308c\u306b\u3088\u308a\u4e16\u306e\u4e2d\u306e\u7aef\u672b\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u3066\u3044\u308b\u30c7\u30fc\u30bf\u306e\u6709\u52b9\u671f\u9650\u304c\u3059\u3079\u3066\u5909\u66f4\u5f8c\u306e\u6642\u9593\uff085\u5206\uff09\u306b\u306a\u308b\u3002<br \/>\n\u203bTTL\u306b\u5f93\u308f\u306a\u3044\u304a\u884c\u5100\u306e\u60aa\u3044\u5b9f\u88c5\u306b\u3064\u3044\u3066\u306f\u7121\u8996\u3002<\/li>\n<li>\u3010\u65b0DNS\u30b5\u30fc\u30d0\u306e\u8a2d\u5b9a\u3011<br \/>\n2. \u3092\u5f85\u3064\u9593\u307e\u3067\u306b\u3001ns11.example.com, ns12.example.com \u306e\u8a2d\u5b9a\u3092 ns01.example.com, ns02.example.com \u3068\u540c\u3058\u72b6\u614b\u306b\u3059\u308b\u3002<\/li>\n<li>ns11.example.com, ns12.example.com \u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b NS\u30ec\u30b3\u30fc\u30c9\uff08ns01, ns02\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u306f\u305a\uff09\u3092ns11, ns12 \u306b\u5909\u66f4\u3059\u308b\uff08\u30b7\u30ea\u30a2\u30eb\u306e\u30ab\u30a6\u30f3\u30c8\u30a2\u30c3\u30d7\u304c\u5fc5\u8981\u306aDNS\u30b5\u30fc\u30d0\u3067\u3042\u308c\u3070\u305d\u308c\u3082\u5fd8\u308c\u305a\u306b\uff09\u3002<br \/>\n\u203b\u3053\u306e\u6642\u70b9\u3067ns11\/ns12\u5074\u306eTTL\u306f\u5143\u306e\u72b6\u614b\uff081\u65e5\uff09\u306b\u623b\u3057\u3066\u3082\u69cb\u3044\u307e\u305b\u3093\u304c\u3001\u5207\u308a\u66ff\u3048\u306e\u5931\u6557\u306a\u3069\u3067\u5207\u308a\u623b\u3059\u3053\u3068\u3092\u60f3\u5b9a\u3059\u308b\u3068\u3001\u307e\u3060\u623b\u3055\u306a\u3044\u65b9\u304c\u3044\u3044\u3068\u601d\u3044\u307e\u3059\u3002\n<\/li>\n<li>\u52d5\u4f5c\u30c6\u30b9\u30c8\u3002<br \/>\n\u65b0DNS\u30b5\u30fc\u30d0\u3067\u9069\u5207\u306a\u56de\u7b54\u3092\u884c\u3046\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002<br \/>\n\u4f8b\uff1a\u4e0b\u8a18\u306a\u3069\u3002<\/p>\n<pre class=\"brush:bash\">\r\ndig ns @xxx.xxx.xxx.xxx example.com\r\ndig ns @yyy.yyy.yyy.yyy example.com\r\ndig a @xxx.xxx.xxx.xxx www.example.com\r\ndig a @yyy.yyy.yyy.yyy www.example.com\r\n<\/pre>\n<p>\u3053\u308c\u306b\u3088\u3063\u3066\u3001\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u767b\u9332\u5909\u66f4\u5f8c\u3082\u6b63\u3057\u3044\u52d5\u4f5c\u3092\u3059\u308b\uff08\u3060\u308d\u3046\uff09\u3053\u3068\u3092\u671f\u5f85\u3067\u304d\u308b\u72b6\u614b\u306b\u306a\u308b\u3002\n<\/li>\n<li>\u3010\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u767b\u9332\u306e\u5909\u66f4\u3011<br \/>\n2. \u3092\u5f85\u3063\u305f\u5f8c\u3001\u30ec\u30b8\u30b9\u30c8\u30e9\u306e\u7ba1\u7406\u753b\u9762\u306a\u3069\u3067\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u767b\u9332\u306e\u5909\u66f4\u3092\u884c\u3046\u3002<br \/>\n\u203b\u304a\u540d\u524d\u3067\u3044\u3046\u300c\u30db\u30b9\u30c8\u767b\u9332\u300d\u3067 ns11\uff08xxx.xxx.xxx.xxx\uff09\u3001ns12\uff08yyy.yyy.yyy.yyy\uff09\u3092\u767b\u9332\u5f8c\u3001\u300c\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u306e\u5909\u66f4\u300d\u3067\u5b9f\u65bd\u3002\n<\/li>\n<li>\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u30dd\u30ea\u30b7\u30fc\u306b\u5fdc\u3058\u305f\u5f85\u3061\u6642\u9593\uff08.jp\u306a\u308915\u5206\uff09\u3092\u904e\u304e\u305f\u5f8c\u3001whois\u306a\u3069\u3067\u78ba\u8a8d\u3002<\/li>\n<li>\n\u5ff5\u306e\u305f\u3081\u3001\u4e0a\u4f4dDNS\u30b5\u30fc\u30d0\uff08\u4eee\u306bIP\u30a2\u30c9\u30ec\u30b9\u304c zzz.zzz.zzz.zzz\uff09\u306b\u5bfe\u3057\u52d5\u4f5c\u78ba\u8a8d\u3002<br \/>\n\u4f8b<\/p>\n<pre class=\"brush:bash\">\r\ndig ns @zzz.zzz.zzz.zzz example.com\r\ndig a @zzz.zzz.zzz.zzz www.example.com\r\n<\/pre>\n<p>\u671f\u5f85\u3059\u308b\u7d50\u679c\u304c\u8fd4\u3063\u3066\u304f\u308c\u3070OK\u3002\n<\/li>\n<li>\u3010\u9593\u306e\u60aa\u3044\u7aef\u672b\u5bfe\u7b56\u3011<br \/>\n\u5909\u66f4\u524d\u306eDNS\u30b5\u30fc\u30d0\uff08ns01, ns02\uff09\u306eNS\u30ec\u30b3\u30fc\u30c9\u8a2d\u5b9a\u3092 ns11, ns12 \u306b\u5909\u66f4\u3002<\/li>\n<li>\u3010\u7d50\u679c\u767a\u8868\u3011<br \/>\n\u77ed\u304f\u3057\u305fTTL\uff085\u5206\uff09\u7d4c\u904e\u5f8c\u3001\u52d5\u4f5c\u30c6\u30b9\u30c8\u3002<br \/>\n\u4f8b\uff1aGoogle Public DNS\u3067\u3002\uff08\u3053\u308c\u304c\u9069\u6b63\u306b\u5909\u308f\u3063\u3066\u3044\u308c\u3070\u304b\u306a\u308a\u306e\u74b0\u5883\u3067\u65b0\u30b5\u30fc\u30d0\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002\uff09<\/p>\n<pre class=\"brush:bash\">\r\ndig ns @8.8.8.8 example.com\r\ndig a @8.8.8.8 www.example.com\r\n<\/pre>\n<p>[warning]<br \/>\n\u3067\u3082 8.8.8.8 \/ 8.8.4.4 \u306f\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u30fc\u3068\u8a00\u308f\u308c\u308b\u5b58\u5728\u3059\u3079\u304d\u3067\u306a\u3044\u30b5\u30fc\u30d3\u30b9\u306a\u306e\u3067\u5229\u7528\u3057\u306a\u3044\u3053\u3068\u3002<br \/>\n\u8a73\u3057\u304f\u306fGoogle\u3067\u300c\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u30fc\u300d\u3092\u691c\u7d22\u3002<br \/>\n\u3068\u3001JPCERT\u306e\u300cDNS \u306e\u518d\u5e30\u7684\u306a\u554f\u3044\u5408\u308f\u305b\u3092\u4f7f\u3063\u305f DDoS \u653b\u6483\u306b\u95a2\u3059\u308b\u6ce8\u610f\u559a\u8d77\u300d <a href=\"https:\/\/www.jpcert.or.jp\/at\/2013\/at130022.html\" target=\"_blank\" class=\"ext-link\" rel=\"external nofollow\">https:\/\/www.jpcert.or.jp\/at\/2013\/at130022.html<\/a> \u3067\u3082\u3002<br \/>\n[\/warning]\n<\/li>\n<li>\u6c17\u304c\u3059\u3093\u3060\u3068\u3053\u308d\u3067\u3001TTL\u3092\u5143\u306b\u623b\u3059\u3002<\/li>\n<\/ol>\n<h3>\u305d\u306e\u4ed6<\/h3>\n<p><del datetime=\"2013-08-20T08:09:38+00:00\">\u30b0\u30eb\u30fc\u30ec\u30b3\u30fc\u30c9\u306f\u540c\u4e00\u30c9\u30e1\u30a4\u30f3\u306e\u3082\u306e\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/del>\uff08\u30b3\u30e1\u30f3\u30c8\u3067\u6307\u6458\u3092\u3044\u305f\u3060\u304d\u4fee\u6b63\uff09<\/p>\n<h4>NS\u30ec\u30b3\u30fc\u30c9\u306f\u540c\u4e00\u30c9\u30e1\u30a4\u30f3\u306e\u3082\u306e\uff08\u5185\u90e8\u540d\uff09\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/h4>\n<p>\n<del datetime=\"2013-08-20T08:09:38+00:00\">\u30b0\u30eb\u30fc\u30ec\u30b3\u30fc\u30c9=\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u306eA\u30ec\u30b3\u30fc\u30c9\u306f\u540c\u4e00\u30c9\u30e1\u30a4\u30f3\u306e\u3082\u306e\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/del>\uff08\u30b0\u30eb\u30fc\u306e\u5b9a\u7fa9\u306a\u3069\u8272\u3005\u9593\u9055\u3044\u304c\u3042\u308b\u306e\u3067\u4fee\u6b63)<\/p>\n<p>[\u8ffd\u8a18 2013.08.20.]<br \/>\n\u305d\u306e\u30c9\u30e1\u30a4\u30f3\uff08\u30be\u30fc\u30f3)\u306eNS\u30ec\u30b3\u30fc\u30c9\u306f\u5185\u90e8\u540d\uff08\u305d\u306e\u30be\u30fc\u30f3\u3068\u540c\u4e00\u306e\u30be\u30fc\u30f3\u306b\u542b\u307e\u308c\u308b\u30db\u30b9\u30c8\u540d\uff09\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>NS\u30ec\u30b3\u30fc\u30c9\u3092\u5185\u90e8\u540d\u306b\u3057\u305f\u5834\u5408\u305d\u306e\u30be\u30fc\u30f3\u306b\u3068\u3063\u3066\u306e\u89aa\u30be\u30fc\u30f3\u307e\u3067\u306e\u60c5\u5831\u3067\u306fNS\u30ec\u30b3\u30fc\u30c9\u306b\u305f\u3069\u308a\u3064\u304f\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u89aa\u30be\u30fc\u30f3\u5185\u306bNS\u306b\u8a2d\u5b9a\u3057\u305f\u30db\u30b9\u30c8\u540d\u306eA\u30ec\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u3053\u306eA\u30ec\u30b3\u30fc\u30c9\u3092\u300c\u30b0\u30eb\u30fc\u30ec\u30b3\u30fc\u30c9\u300d\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n<p>\u5916\u90e8\u540d\uff08\u5225\u30be\u30fc\u30f3\u306e\u30db\u30b9\u30c8\uff09\u306eNS\u30ec\u30b3\u30fc\u30c9\u306e\u5834\u5408\u3001\u30b0\u30eb\u30fc\u30ec\u30b3\u30fc\u30c9\u306f\u4e0d\u8981\u3067\u3059\u3002<br \/>\n\uff08\u4e0d\u8981\u3068\u8a00\u3046\u3088\u308a\u3001\u5bb3\u3067\u3059\u3002\uff09<br \/>\n\u5225\u30be\u30fc\u30f3\u3067\u3042\u308b\u4ee5\u4e0a\u3001\u305d\u306e\u30db\u30b9\u30c8\u540d\u306f ROOT-SERVERS \u304b\u3089\u5225\u9014\u305f\u3069\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306f\u305a\u3067\u3042\u308a\u3001\u5916\u90e8\u540d\u306f\u305d\u306e\u5916\u90e8\u540d\u306e\u30be\u30fc\u30f3\u306e\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u304b\u3089\u540d\u524d\u89e3\u6c7a\u3055\u308c\u308b\u3079\u304d\u3082\u306e\u3060\u304b\u3089\u3067\u3059\u3002<br \/>\n[\/\u8ffd\u8a18]<\/p>\n<p>\u540c\u4e00\u30c9\u30e1\u30a4\u30f3\u3067\u3042\u308c\u3070<\/p>\n<pre class=\"brush:plain\">\r\n@example.com\r\n       IN    NS    ns11\r\n       IN    NS    ns12\r\nns11   IN    A     xxx.xxx.xxx.xxx\r\nns12   IN    A     yyy.yyy.yyy.yyy\r\n<\/pre>\n<p>\u3068\u306a\u308a\u3001<\/p>\n<p>example.com \u306eNS \u2192 ns11.example.com, ns12.example.com<br \/>\nns11.example.com \u2192 xxx.xxx.xxx.xxx<\/p>\n<p>\u3068\u691c\u7d22\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u5225\u306e\u30c9\u30e1\u30a4\u30f3\u3067\u3042\u308b\u5834\u5408\u3001<\/p>\n<p>example.com \u306eNS\u2192 ns11.example.net, ns12.example.net<br \/>\nexample.net \u306eNS\u2192 \u4f55\u3089\u304b\u306e\u8fd4\u7b54<br \/>\n\u8fd4\u7b54\u3055\u308c\u305f\u30b5\u30fc\u30d0\u306b\u5bfe\u3057ns11.example.net \u2192 xxx.xxx.xxx.xxx<\/p>\n<p>\u3068\u691c\u7d22\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"brush:plain\">\r\n@example.com\r\n       IN    NS    ns11.example.net.\r\n       IN    NS    ns12.example.net.\r\n<\/pre>\n<p>\u3068<\/p>\n<pre class=\"brush:plain\">\r\n@example.net\r\nns11   IN    A     xxx.xxx.xxx.xxx\r\nns12   IN    A     yyy.yyy.yyy.yyy\r\n<\/pre>\n<p>\u306e2\u3064\u306e\u30be\u30fc\u30f3\u304c\u3042\u308b\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<br \/>\n\u7121\u99c4\u304c\u591a\u3044\u3060\u3051\u3067\u306a\u304f\u3001\u4f8b\u3048\u3070\u3053\u306e\u8a2d\u5b9a\u3092\u5fd8\u308c\u3066 example.net \u30c9\u30e1\u30a4\u30f3\u3060\u3051\u5ec3\u6b62\u3057\u305f\u308a\u3059\u308b\u3068\u3001example.com \u30c9\u30e1\u30a4\u30f3\u306e\u540d\u524d\u89e3\u6c7a\u3082\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>[\u8ffd\u8a18 2013.08.20.]<\/p>\n<h4>\u53c2\u8003\u8cc7\u6599<\/h4>\n<p>JPRS\u306e\u68ee\u4e0b\u3055\u3093\u304c\u4f5c\u3089\u308c\u305fDNS Summer Days 2013\u306e\u8cc7\u6599 <a href=\"http:\/\/dnsops.jp\/event\/20130719\/20130719-undocumented-DNS-orange-6.pdf\" target=\"_blank\" class=\"ext-link\" rel=\"external nofollow\">http:\/\/dnsops.jp\/event\/20130719\/20130719-undocumented-DNS-orange-6.pdf<\/a><br \/>\n[\/\u8ffd\u8a18]<\/p>\n<h3>\u9593\u9055\u3044\u7b49\u306e\u3054\u6307\u6458<\/h3>\n<p>\u81ea\u5206\u306e\u7406\u89e3\u3068\u3001\u3044\u3064\u3082\u306e\u624b\u9806\u3092\u307e\u3068\u3081\u3066\u307f\u307e\u3057\u305f\u3002<br \/>\n\u9593\u9055\u3044\u306a\u3069\u3042\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u3054\u6307\u6458\u7b49\u3044\u305f\u3060\u3051\u308c\u3070\u5e78\u3044\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3044\u308f\u3086\u308b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3067\u3001\u3042\u308b\u30c9\u30e1\u30a4\u30f3\u540d\u306eDNS\u30b5\u30fc\u30d0\u3092\u5225\u306e\u30b5\u30fc\u30d0\u306b\u5909\u66f4\uff08\u79fb\u884c\uff09\u3059\u308b\u969b\u306e\u6ce8\u610f\u4e8b\u9805\u3084\u3089\u624b\u9806\u3084\u3089\u3002 \u203bDNS\u306b\u3064\u3044\u3066\u306f\u3001\u69d8\u3005\u7406\u89e3\u3059\u3079\u304d\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002 \u305c\u3072\u3053\u3061\u3089\u3082\u3054\u89a7\u304f\u3060\u3055\u3044\u2192 DNS\u306b\u3064\u3044\u3066\u3002 \u524d\u63d0\u306a\u3069  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[69],"tags":[],"class_list":["post-1606","post","type-post","status-publish","format-standard","hentry","category-domain_dns"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":2109,"url":"https:\/\/wp.kaz.bz\/tech\/2016\/03\/29\/2109.html","url_meta":{"origin":1606,"position":0},"title":"SOA\u3092\u5229\u7528\u3057\u305f\u30be\u30fc\u30f3\u4e0d\u5b58\u5728\u60c5\u5831\u3092\u507d\u5fdc\u7b54\u306e\u8a55\u4fa1\u306b\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3064\u3044\u3066\u3002","author":"kaz. 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