{"id":21661,"date":"2021-07-03T10:07:18","date_gmt":"2021-07-03T10:07:18","guid":{"rendered":"https:\/\/www.dotcom-monitor.com\/blog\/2021\/07\/03\/dns-%e3%81%ae%e5%81%9c%e6%ad%a2%e3%82%92%e5%9b%9e%e9%81%bf%e3%81%99%e3%82%8b-dns-%e7%9b%a3%e8%a6%96%e3%81%ab%e3%82%88%e3%82%8b%e3%83%80%e3%82%a6%e3%83%b3%e3%82%bf%e3%82%a4%e3%83%a0%e3%81%ae%e7%9f%ad\/"},"modified":"2026-07-15T21:08:29","modified_gmt":"2026-07-15T21:08:29","slug":"dns-%e3%81%ae%e5%81%9c%e6%ad%a2%e3%82%92%e5%9b%9e%e9%81%bf%e3%81%99%e3%82%8b-dns-%e7%9b%a3%e8%a6%96%e3%81%ab%e3%82%88%e3%82%8b%e3%83%80%e3%82%a6%e3%83%b3%e3%82%bf%e3%82%a4%e3%83%a0%e3%81%ae%e7%9f%ad","status":"publish","type":"post","link":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/dns-%e3%81%ae%e5%81%9c%e6%ad%a2%e3%82%92%e5%9b%9e%e9%81%bf%e3%81%99%e3%82%8b-dns-%e7%9b%a3%e8%a6%96%e3%81%ab%e3%82%88%e3%82%8b%e3%83%80%e3%82%a6%e3%83%b3%e3%82%bf%e3%82%a4%e3%83%a0%e3%81%ae%e7%9f%ad\/","title":{"rendered":"DNS\u969c\u5bb3\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>\u79c1\u305f\u3061\u306e\u9ad8\u901f\u5316\u3059\u308b\u30c7\u30b8\u30bf\u30eb\u4e16\u754c\u3067\u306f\u3001\u4fe1\u983c\u3067\u304d\u308b\u30aa\u30f3\u30e9\u30a4\u30f3\u30a2\u30af\u30bb\u30b9\u306f\u5fc5\u9808\u3067\u3059\u3002\u3053\u306e\u4fe1\u983c\u6027\u306e\u4e2d\u5fc3\u306b\u3042\u308b\u306e\u304c\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\u30b7\u30b9\u30c6\u30e0\uff08DNS\uff09\u3067\u3042\u308a\u3001\u3057\u3070\u3057\u3070\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u96fb\u8a71\u5e33\u3068\u547c\u3070\u308c\u307e\u3059\u3002DNS\u306f\u3001www.example.com\u306e\u3088\u3046\u306a\u30e6\u30fc\u30b6\u30fc\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306a\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u7406\u89e3\u3067\u304d\u308bIP\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3057\u307e\u3059\u3002DNS\u304c\u306a\u3051\u308c\u3070\u3001\u30a6\u30a7\u30d6\u306e\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u306f\u975e\u5e38\u306b\u56f0\u96e3\u306b\u306a\u308a\u3001\u4f01\u696d\u304cDNS\u30b5\u30fc\u30d3\u30b9\u3092\u5e38\u306b\u7a3c\u50cd\u72b6\u614b\u306b\u4fdd\u3064\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u306b\u306a\u308a\u307e\u3059\u3002\u6b8b\u5ff5\u306a\u304c\u3089\u3001DNS\u306e\u969c\u5bb3\u306f\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u3001\u305d\u306e\u7d50\u679c\u3001\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u3001\u30b5\u30fc\u30d3\u30b9\u304c\u4e2d\u65ad\u3055\u308c\u308b\u3068\u3044\u3063\u305f\u30d5\u30e9\u30b9\u30c8\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u3067\u306f\u3001DNS\u969c\u5bb3\u3068\u306f\u4f55\u304b\u3001\u4e00\u822c\u7684\u306a\u539f\u56e0\u3001\u305d\u3057\u3066\u305d\u308c\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5\u3092\u63a2\u308a\u307e\u3059\u3002<\/p>\n<h2 id='dns\u969c\u5bb3\u3068\u306f'  id=\"boomdevs_1\" id=\"what-are-dns-outages\">DNS\u969c\u5bb3\u3068\u306f\uff1f<\/h2>\n<p>DNS\u969c\u5bb3\u306f\u3001DNS\u30b5\u30fc\u30d3\u30b9\u304c\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u5bfe\u5fdc\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9\u306b\u89e3\u6c7a\u3067\u304d\u306a\u304f\u306a\u308b\u6642\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u30e6\u30fc\u30b6\u30fc\u304c\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u969b\u306b\u3001\u305d\u306e\u8981\u6c42\u304c\u5b8c\u4e86\u3067\u304d\u305a\u3001<a href=\"https:\/\/www.dotcom-monitor.com\/blog\/synthetic-application-monitoring-to-prevent-downtime\/\">\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0<\/a>\u306b\u3064\u306a\u304c\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u5f71\u97ff\u306f\u5c0f\u3055\u306a\u4e0d\u4fbf\u304b\u3089\u5927\u898f\u6a21\u306a\u6df7\u4e71\u307e\u3067\u69d8\u3005\u3067\u3001\u969c\u5bb3\u306e\u898f\u6a21\u3084\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30b5\u30fc\u30d3\u30b9\u306e\u91cd\u8981\u6027\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u969c\u5bb3\u3092\u9632\u3050\u65b9\u6cd5\u3092\u77e5\u308b\u3053\u3068\u306f\u3001\u5186\u6ed1\u306a\u904b\u55b6\u3092\u7dad\u6301\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u6e80\u8db3\u5ea6\u3092\u4fdd\u3064\u305f\u3081\u306b\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002<\/p>\n<h2 id='\u4e00\u822c\u7684\u306adns\u969c\u5bb3'  id=\"boomdevs_2\" id=\"common-dns-outages\">\u4e00\u822c\u7684\u306aDNS\u969c\u5bb3<\/h2>\n<h3 id='1-\u30b5\u30fc\u30d0\u30fc\u306e\u8aa4\u8a2d\u5b9a'  id=\"boomdevs_3\">1. \u30b5\u30fc\u30d0\u30fc\u306e\u8aa4\u8a2d\u5b9a<\/h3>\n<p>DNS\u969c\u5bb3\u306e\u6700\u3082\u591a\u3044\u539f\u56e0\u306e\u4e00\u3064\u306f\u30b5\u30fc\u30d0\u30fc\u306e\u8aa4\u8a2d\u5b9a\u3067\u3059\u3002\u3053\u308c\u306fDNS\u30ec\u30b3\u30fc\u30c9\u304c\u8aa4\u3063\u3066\u8a2d\u5b9a\u3055\u308c\u3001\u30c9\u30e1\u30a4\u30f3\u540d\u304c\u6b63\u3057\u304f\u89e3\u6c7a\u3055\u308c\u306a\u304f\u306a\u308b\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u8aa4\u8a2d\u5b9a\u306f\u901a\u5e38\u3001\u5b9a\u671f\u7684\u306a\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3084\u79fb\u884c\u6642\u306b\u767a\u751f\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u91cd\u8981\u306a\u30ea\u30bd\u30fc\u30b9\u306b\u63a5\u7d9a\u3067\u304d\u306a\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3 id='2-\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u306e\u554f\u984c'  id=\"boomdevs_4\">2. \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u306e\u554f\u984c<\/h3>\n<p>DNS\u30b5\u30fc\u30d0\u30fc\u306f\u5b89\u5b9a\u3057\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u304c\u5fc5\u8981\u3067\u3059\u3002\u30d1\u30b1\u30c3\u30c8\u30ed\u30b9\u3084\u9045\u5ef6\u306a\u3069\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u554f\u984c\u304c\u3042\u308b\u3068\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u89e3\u6c7a\u3059\u308b\u306e\u306b\u56f0\u96e3\u3092\u611f\u3058\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3046\u3057\u305f\u554f\u984c\u306e\u539f\u56e0\u306f\u3001\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u6545\u969c\u3084\u30eb\u30fc\u30bf\u30fc\u306e\u8aa4\u8a2d\u5b9a\u3001\u3055\u3089\u306b\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\uff08ISP\uff09\u306e\u554f\u984c\u306a\u3069\u591a\u5c90\u306b\u308f\u305f\u308a\u307e\u3059\u3002<\/p>\n<h3 id='3-dns\u30b5\u30fc\u30d0\u30fc\u306e\u969c\u5bb3'  id=\"boomdevs_5\">3. DNS\u30b5\u30fc\u30d0\u30fc\u306e\u969c\u5bb3<\/h3>\n<p>DNS\u30b5\u30fc\u30d0\u30fc\u306f\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u554f\u984c\u3084\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306e\u30d0\u30b0\u3001\u3055\u3089\u306b\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u306b\u3088\u3063\u3066\u969c\u5bb3\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30d7\u30e9\u30a4\u30de\u30eaDNS\u30b5\u30fc\u30d0\u30fc\u304c\u30c0\u30a6\u30f3\u3057\u3001\u9069\u5207\u306a\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u306a\u3051\u308c\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u5fc5\u8981\u306a\u30b5\u30fc\u30d3\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u304f\u306a\u308b\u6050\u308c\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3 id='4-ddos\u653b\u6483'  id=\"boomdevs_6\">4. DDoS\u653b\u6483<\/h3>\n<p>\u5206\u6563\u578b\u30b5\u30fc\u30d3\u30b9\u62d2\u5426\uff08DDoS\uff09\u653b\u6483\u306fDNS\u30b5\u30fc\u30d3\u30b9\u306b\u91cd\u5927\u306a\u30ea\u30b9\u30af\u3092\u4e0e\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u653b\u6483\u306fDNS\u30b5\u30fc\u30d0\u30fc\u306b\u904e\u5270\u306a\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u9001\u308a\u8fbc\u307f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4f4e\u4e0b\u3084\u5b8c\u5168\u306a\u969c\u5bb3\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002\u30aa\u30f3\u30e9\u30a4\u30f3\u30b5\u30fc\u30d3\u30b9\u3078\u306e\u4f9d\u5b58\u304c\u9ad8\u307e\u308b\u306b\u3064\u308c\u3066\u3001DNS\u30b5\u30fc\u30d0\u30fc\u3092\u72d9\u3063\u305fDDoS\u653b\u6483\u306e\u8105\u5a01\u3082\u5897\u5927\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3 id='5-ttl\u306e\u671f\u9650\u5207\u308c\u3068\u30ad\u30e3\u30c3\u30b7\u30e5\u554f\u984c'  id=\"boomdevs_7\">5. TTL\u306e\u671f\u9650\u5207\u308c\u3068\u30ad\u30e3\u30c3\u30b7\u30e5\u554f\u984c<\/h3>\n<p>TTL\uff08Time to Live\uff09\u5024\u306fDNS\u30ec\u30b3\u30fc\u30c9\u304c\u30b5\u30fc\u30d0\u30fc\u3084\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u3069\u308c\u304f\u3089\u3044\u9577\u304f\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u308b\u304b\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002DNS\u30ec\u30b3\u30fc\u30c9\u304c\u5909\u66f4\u3055\u308c\u3066\u3082TTL\u304c\u671f\u9650\u5207\u308c\u3067\u306a\u3051\u308c\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u53e4\u3044\u307e\u305f\u306f\u9593\u9055\u3063\u305fIP\u30a2\u30c9\u30ec\u30b9\u306b\u8a98\u5c0e\u3055\u308c\u3001\u63a5\u7d9a\u306b\u5931\u6557\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30ad\u30e3\u30c3\u30b7\u30e5\u554f\u984c\u306f\u7570\u306a\u308b\u30e6\u30fc\u30b6\u30fc\u3084\u5730\u57df\u9593\u3067DNS\u89e3\u6c7a\u304c\u4e00\u8cab\u3057\u306a\u3044\u539f\u56e0\u306b\u3082\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2 id='dns\u76e3\u8996\u306e\u91cd\u8981\u6027'  id=\"boomdevs_8\" id=\"the-importance-of-monitoring-your-dns\">DNS\u76e3\u8996\u306e\u91cd\u8981\u6027<\/h2>\n<p><a href=\"https:\/\/www.dotcom-monitor.com\/ja\/%e3%83%a2%e3%83%8b%e3%82%bf%e3%83%aa%e3%83%b3%e3%82%b0%e8%a3%bd%e5%93%81\/dns%e7%9b%a3%e8%a6%96%e3%83%84%e3%83%bc%e3%83%ab-%e3%83%89%e3%83%83%e3%83%88%e3%82%b3%e3%83%a0%e3%83%a2%e3%83%8b%e3%82%bf%e3%83%bc\/\">DNS\u76e3\u8996<\/a>\u306f\u30b5\u30fc\u30d3\u30b9\u306e\u4e2d\u65ad\u3092\u9632\u304e\u3001\u4fe1\u983c\u3067\u304d\u308b\u30aa\u30f3\u30e9\u30a4\u30f3\u30d7\u30ec\u30bc\u30f3\u30b9\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002<a 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href=\"https:\/\/www.dotcom-monitor.com\/ja\/%e3%83%a2%e3%83%8b%e3%82%bf%e3%83%aa%e3%83%b3%e3%82%b0%e8%a3%bd%e5%93%81\/dns%e7%9b%a3%e8%a6%96%e3%83%84%e3%83%bc%e3%83%ab-%e3%83%89%e3%83%83%e3%83%88%e3%82%b3%e3%83%a0%e3%83%a2%e3%83%8b%e3%82%bf%e3%83%bc\/\">DNS\u76e3\u8996<\/a><\/strong>\u3068\u3044\u3048\u3070\u3001Dotcom-Monitor\u306f\u7d20\u6674\u3089\u3057\u3044\u9078\u629e\u80a2\u3067\u3059\uff01\u5f53\u793e\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306fDNS\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u76e3\u8996\u3057\u3001\u969c\u5bb3\u306b\u767a\u5c55\u3059\u308b\u524d\u306b\u554f\u984c\u3092\u30a2\u30e9\u30fc\u30c8\u3057\u307e\u3059\u3002Dotcom-Monitor\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059:<\/p>\n<ul>\n<li>\u6d1e\u5bdf\u306b\u6e80\u3061\u305f\u5206\u6790: 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href=\"https:\/\/www.dotcom-monitor.com\/\">Dotcom-Monitor\u306e\u9ad8\u5ea6\u306a\u76e3\u8996<\/a><\/strong>\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308c\u3070\u3001DNS\u969c\u5bb3\u3092\u52b9\u679c\u7684\u306b\u56de\u907f\u3057\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u30b5\u30fc\u30d3\u30b9\u306e\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8a2a\u554f\u8005\u304c\u6c42\u3081\u308b\u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3053\u3068\u3001\u305d\u3057\u3066\u305d\u308c\u304c\u5408\u7406\u7684\u306a\u6642\u9593\u5185\u3067\u3042\u308b\u3053\u3068\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002DNS\u76e3\u8996\u306f\u3001\u4e00\u8cab\u3057\u305f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u63a5\u7d9a\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306e\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u3067\u3059\u3002<\/p>\n","protected":false},"author":21,"featured_media":21662,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6027],"tags":[],"class_list":["post-21661","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-6027"],"_links":{"self":[{"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/posts\/21661","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/users\/21"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/comments?post=21661"}],"version-history":[{"count":0,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/posts\/21661\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/media\/21662"}],"wp:attachment":[{"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/media?parent=21661"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/categories?post=21661"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/wp-json\/wp\/v2\/tags?post=21661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}