{"id":11402,"date":"2026-11-03T12:05:51","date_gmt":"2026-11-03T03:05:51","guid":{"rendered":"https:\/\/venu-sys.co.jp\/jo-sys\/?p=11402"},"modified":"2026-11-03T12:07:27","modified_gmt":"2026-11-03T03:07:27","slug":"dns-cache-poisoning-taisaku","status":"publish","type":"post","link":"https:\/\/venu-sys.co.jp\/jo-sys\/11402\/","title":{"rendered":"\u3010IPA2024\u5e74\u5ea6\u30c7\u30fc\u30bf\u3011DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u5bfe\u7b56\uff5c\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u304c\u5404\u81ea\u4efb\u305b\u306e\u4f01\u696d69.7%\u3068\u8a2d\u5b9a5\u9805\u76ee"},"content":{"rendered":"<p>\u300cDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u300d\u3068\u3044\u3046\u8a00\u8449\u306f\u805e\u3044\u305f\u3053\u3068\u304c\u3042\u3063\u3066\u3082\u3001\u81ea\u793e\u3067\u3069\u3053\u307e\u3067\u5bfe\u7b56\u3059\u3079\u304d\u304b\u306f\u8ff7\u3044\u307e\u3059\u3088\u306d\u3002<\/p>\n<ul>\n<li>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3063\u3066\u3001\u3046\u3061\u306e\u4f1a\u793e\u306b\u3082\u95a2\u4fc2\u3042\u308b\u306e\uff1f<\/li>\n<li>DNSSEC\u306f\u4e2d\u5c0f\u4f01\u696d\u3067\u3082\u5fc5\u8981\uff1f<\/li>\n<li>\u5bfe\u7b56\u3068\u8a00\u308f\u308c\u3066\u3082\u3001\u4f55\u304b\u3089\u624b\u3092\u4ed8\u3051\u308c\u3070\u3044\u3044\u304b\u5206\u304b\u3089\u306a\u3044<\/li>\n<\/ul>\n<p>\u7d50\u8ad6\u304b\u3089\u8a00\u3046\u3068\u3001\u5bfe\u7b56\u306e\u57fa\u672c\u306f3\u3064\u3067\u3059\u3002DNS\u306e\u78ba\u8a8d\u62c5\u5f53\u8005\u3092\u6c7a\u3081\u308b\u3053\u3068\u3001DNS\u30b5\u30fc\u30d0\u30fc\u3084\u30eb\u30fc\u30bf\u30fc\u3092\u6700\u65b0\u306b\u4fdd\u3064\u3053\u3068\u3001DNS\u306e\u8a2d\u5b9a\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u653b\u6483\u306e\u4ed5\u7d44\u307f\u3092\u77ed\u304f\u62bc\u3055\u3048\u305f\u3046\u3048\u3067\u3001\u5bfe\u7b56\u306e\u7bc4\u56f2\u3068\u3001\u88ab\u5bb3\u304c\u7591\u308f\u308c\u308b\u3068\u304d\u306e\u78ba\u8a8d\u624b\u9806\u307e\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u3053\u306e\u8a18\u4e8b\u306e\u30dd\u30a4\u30f3\u30c8<\/strong><\/p>\n<ul>\n<li>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u88ab\u5bb3\u4ef6\u6570\u3092<strong>\u5358\u72ec\u3067\u793a\u3059\u516c\u7684\u7d71\u8a08\u306f\u898b\u5f53\u305f\u3089\u305a<\/strong>\u3001IPA\u306e10\u5927\u8105\u5a01\uff082026\u5e74\u7248\uff09\u3067\u3082\u72ec\u7acb\u3057\u305f\u9805\u76ee\u306b\u306a\u3063\u3066\u3044\u306a\u3044<\/li>\n<li>IPA\u306e2024\u5e74\u5ea6\u8abf\u67fb\u3067\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3092\u300c\u5404\u81ea\u306e\u5bfe\u5fdc\u300d\u306b\u3057\u3066\u3044\u308b\u4e2d\u5c0f\u4f01\u696d\u7b49\u304c69.7%\uff08\u51fa\u5178: <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/security\/reports\/sme\/nl10bi000000fbvc-att\/sme-chousa-report2024r1.pdf\">IPA\u300c2024\u5e74\u5ea6 \u4e2d\u5c0f\u4f01\u696d\u306b\u304a\u3051\u308b\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306b\u95a2\u3059\u308b\u5b9f\u614b\u8abf\u67fb \u5831\u544a\u66f8\u300d<\/a>\uff09\u3002DNS\u306b\u9650\u3063\u305f\u6570\u5024\u3067\u306f\u306a\u3044\u304c\u3001\u5bfe\u7b56\u306f\u307e\u305a\u62c5\u5f53\u8005\u6c7a\u3081\u304b\u3089<\/li>\n<li>\u5bfe\u7b56\u306e\u7bc4\u56f2\u306f\u3001\u81ea\u793e\u3067\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3067\u5909\u308f\u308b<\/li>\n<\/ul>\n<h2>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306f\u507d\u306eDNS\u5fdc\u7b54\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u899a\u3048\u3055\u305b\u3001\u5229\u7528\u8005\u3092\u507d\u30b5\u30a4\u30c8\u3078\u8a98\u5c0e\u3059\u308b\u653b\u6483<\/h2>\n<p><img decoding=\"async\" alt=\"\u30ad\u30e3\u30c3\u30b7\u30e5\u6c5a\u67d3\u306e\u4ed5\u7d44\u307f\" src=\"https:\/\/venu-sys.co.jp\/jo-sys\/wp-content\/uploads\/sites\/2\/2026\/11\/h2-1-4.png\" \/><\/p>\n<p>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306f\u3001<strong>DNS\u30b5\u30fc\u30d0\u30fc\u306b\u507d\u306e\u60c5\u5831\u3092\u899a\u3048\u3055\u305b\u3001\u5229\u7528\u8005\u3092\u507d\u306e\u30b5\u30fc\u30d0\u30fc\u3078\u8a98\u5c0e\u3059\u308b\u653b\u6483<\/strong>\u3067\u3059\u3002\u300cDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u6c5a\u67d3\u300d\u3084\u300cDNS\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u300d\u3068\u547c\u3070\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u793e\u5185\u306e\u30d1\u30bd\u30b3\u30f3\u304cWeb\u30b5\u30a4\u30c8\u3092\u958b\u304f\u3068\u304d\u3001\u7aef\u672b\u306f\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\uff08\u30d5\u30eb\u30ea\u30be\u30eb\u30d0\uff09\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u554f\u3044\u5408\u308f\u305b\u307e\u3059\u3002\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u306f\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u30fc\u306b\u7b54\u3048\u3092\u805e\u304d\u3001\u305d\u306e\u7d50\u679c\u3092\u4e00\u5b9a\u6642\u9593\u30ad\u30e3\u30c3\u30b7\u30e5\uff08\u8a18\u61b6\uff09\u3057\u307e\u3059\u3002<\/p>\n<p>\u653b\u6483\u8005\u306f\u3001\u3053\u306e\u554f\u3044\u5408\u308f\u305b\u306b\u5bfe\u3057\u3066\u6b63\u898f\u306e\u5fdc\u7b54\u3088\u308a\u5148\u306b\u507d\u306e\u5fdc\u7b54\u3092\u9001\u308a\u8fbc\u307f\u307e\u3059\u3002\u507d\u306e\u5fdc\u7b54\u304c\u53d7\u3051\u5165\u308c\u3089\u308c\u308b\u3068\u3001\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u306f\u8aa4\u3063\u305fIP\u30a2\u30c9\u30ec\u30b9\u3092\u8a18\u61b6\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u6b8b\u3063\u3066\u3044\u308b\u9593\u306f\u3001\u540c\u3058\u30b5\u30fc\u30d0\u30fc\u3092\u4f7f\u3046\u5168\u54e1\u304c\u5f71\u97ff\u3092\u53d7\u3051\u307e\u3059\u3002\u5229\u7528\u8005\u306f\u6b63\u3057\u3044\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u5165\u529b\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u7570\u5909\u306b\u6c17\u3065\u304d\u306b\u304f\u3044\u306e\u304c\u7279\u5fb4\u3067\u3059\u3002<\/p>\n<p>\u8d77\u3053\u308a\u3046\u308b\u88ab\u5bb3\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u507d\u306e\u30ed\u30b0\u30a4\u30f3\u753b\u9762\u3067\u3001ID\u3084\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u5165\u529b\u3055\u305b\u3089\u308c\u308b<\/li>\n<li>\u30e1\u30fc\u30eb\u304c\u653b\u6483\u8005\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u5c4a\u304d\u3001\u8aa4\u914d\u9001\u3084\u76d7\u307f\u898b\u304c\u8d77\u304d\u308b<\/li>\n<li>\u6b63\u898f\u306e\u30b5\u30a4\u30c8\u3092\u88c5\u3063\u305f\u507d\u30b5\u30a4\u30c8\u304b\u3089\u3001\u30de\u30eb\u30a6\u30a7\u30a2\u3092\u914d\u5e03\u3055\u308c\u308b<\/li>\n<\/ul>\n<p>\u3064\u307e\u308a\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306f<strong>\u540d\u524d\u89e3\u6c7a\u306e\u6bb5\u968e\u3067\u5229\u7528\u8005\u3092\u3060\u307e\u3059\u653b\u6483<\/strong>\u3067\u3059\u3002\u5bfe\u7b56\u306f\u3001DNS\u30b5\u30fc\u30d0\u30fc\u306e\u8a2d\u5b9a\u3068\u3001\u3060\u307e\u3055\u308c\u305f\u5f8c\u306e\u88ab\u5bb3\u3092\u5c0f\u3055\u304f\u3059\u308b\u5bfe\u7b56\u306e\u4e21\u9762\u304b\u3089\u8003\u3048\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" alt=\"DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u4ed5\u7d44\u307f\uff08\u6982\u5ff5\u56f3\uff09\" src=\"https:\/\/venu-sys.co.jp\/jo-sys\/wp-content\/uploads\/sites\/2\/2026\/11\/fig3-mechanism.png\" \/><\/p>\n<p style=\"font-size:13px;color:#777;margin:1em 0 0\">\u53c2\u8003: <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.soumu.go.jp\/main_sosiki\/joho_tsusin\/security_previous\/download\/juyogijutsu.pdf\">\u7dcf\u52d9\u7701\u300cDNS\u306e\u4ed5\u7d44\u307f\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u8105\u5a01\u30fbDNSSEC\u300d\u89e3\u8aac\u8cc7\u6599\uff08PDF\uff09<\/a><\/p>\n<h2>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u88ab\u5bb3\u4ef6\u6570\u3092\u5358\u72ec\u3067\u793a\u3059\u516c\u7684\u7d71\u8a08\u306f\u898b\u5f53\u305f\u3089\u306a\u3044<\/h2>\n<p><img decoding=\"async\" alt=\"\u7d71\u8a08\u306b\u73fe\u308c\u306a\u3044\u653b\u6483\" src=\"https:\/\/venu-sys.co.jp\/jo-sys\/wp-content\/uploads\/sites\/2\/2026\/11\/h2-2-4.png\" \/><\/p>\n<p>\u88ab\u5bb3\u306e\u898f\u6a21\u3092\u6570\u5b57\u3067\u77e5\u308a\u305f\u3044\u65b9\u3082\u591a\u3044\u3067\u3059\u3088\u306d\u3002\u3057\u304b\u3057\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u88ab\u5bb3\u4ef6\u6570\u3092<strong>\u5358\u72ec\u3067<\/strong>\u793a\u3059\u516c\u7684\u306a\u7d71\u8a08\u306f\u898b\u5f53\u305f\u308a\u307e\u305b\u3093\u3002<\/p>\n<h3>IPA\u306e10\u5927\u8105\u5a01 2026\u3067DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306f\u72ec\u7acb\u3057\u305f\u9805\u76ee\u306b\u306a\u3063\u3066\u304a\u3089\u305a\u3001DNS\u3078\u306e\u653b\u6483\u306fDDoS\u653b\u6483\u306e\u89e3\u8aac\u3067\u89e6\u308c\u3089\u308c\u3066\u3044\u308b<\/h3>\n<p>IPA\u306e\u300c\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a310\u5927\u8105\u5a01 2026\u300d\u3067\u306f\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306f\u72ec\u7acb\u3057\u305f\u9805\u76ee\u306b\u306a\u3063\u3066\u3044\u307e\u305b\u3093\u3002<strong>\u306a\u304a\u3001\u904e\u53bb\u306b\u306f2009\u5e74\u7248\u3067\u3001\u7d44\u7e54\u3078\u306e\u8105\u5a01\u306e\u72ec\u7acb\u3057\u305f\u9805\u76ee\u3068\u3057\u3066\u53d6\u308a\u4e0a\u3052\u3089\u308c\u3066\u3044\u307e\u3057\u305f<\/strong>\u3002<\/p>\n<p>2026\u5e74\u7248\u306e\u7d44\u7e54\u7de8\u3067\u306f\u3001<a href=\"https:\/\/venu-sys.co.jp\/jo-sys\/10625\/\">DDoS\u653b\u6483<\/a>\u304c9\u4f4d\u306b\u9078\u3070\u308c\u3066\u3044\u307e\u3059\u3002<strong>DNS\u3078\u306e\u653b\u6483\u304c\u5177\u4f53\u7684\u306b\u51fa\u3066\u304f\u308b\u306e\u306f\u4e3b\u306b\u3053\u306e\u89e3\u8aac\u306e\u4e2d\u3067\u3001\u300cDNS\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u653b\u6483\u300d\u3084\u300cDNS\u6c34\u8cac\u3081\u653b\u6483\uff08\u30e9\u30f3\u30c0\u30e0\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u653b\u6483\uff09\u300d\u304c\u7d39\u4ecb\u3055\u308c\u3066\u3044\u307e\u3059<\/strong>\u3002\u3069\u3061\u3089\u3082\u5927\u91cf\u306e\u901a\u4fe1\u3067\u30b5\u30fc\u30d0\u30fc\u306b\u8ca0\u8377\u3092\u304b\u3051\u308b\u653b\u6483\u3067\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3068\u306f\u4ed5\u7d44\u307f\u304c\u9055\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u9805\u76ee\u69cb\u6210\u304b\u3089\u8aad\u307f\u53d6\u308c\u308b\u306e\u306f\u3001<strong>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306f\u73fe\u5728\u306e\u8105\u5a01\u30e9\u30f3\u30ad\u30f3\u30b0\u306e\u4e2d\u3067\u72ec\u7acb\u3057\u3066\u6271\u308f\u308c\u3066\u3044\u306a\u3044<\/strong>\u3068\u3044\u3046\u70b9\u3067\u3059\u3002<\/p>\n<div style=\"border:2px solid #eb6834;border-radius:8px;background:#fdf3ee;padding:14px 18px;margin:1.5em 0\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#c2521f\">\u6ce8\u610f<\/p>\n<p style=\"margin:0\">10\u5927\u8105\u5a01\u306e\u9806\u4f4d\u306f\u6295\u7968\u306b\u3088\u308b\u8a55\u4fa1\u3067\u3001\u767a\u751f\u4ef6\u6570\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002DDoS\u653b\u6483\u306e\u9806\u4f4d\u3092\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u9806\u4f4d\u3068\u3057\u3066\u8aad\u307e\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n<h3>\u88ab\u5bb3\u306e\u5f62\u304c\u8fd1\u3044\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u306e\u9805\u76ee\u3082\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3092\u6570\u3048\u305f\u3082\u306e\u3067\u306f\u306a\u3044<\/h3>\n<p>\u88ab\u5bb3\u306e\u5f62\u306f\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u3068\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u306e\u9805\u76ee\u3082DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3092\u6570\u3048\u305f\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>10\u5927\u8105\u5a01 2026\u306e\u500b\u4eba\u7de8\u3067\u306f\u3001\u300c\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u306b\u3088\u308b\u500b\u4eba\u60c5\u5831\u7b49\u306e\u8a50\u53d6\u300d\u304c8\u5e74\u9023\u7d9a\u3067\u9078\u3070\u308c\u3066\u3044\u307e\u3059\u3002\u507d\u30b5\u30a4\u30c8\u3067ID\u3084\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u5165\u529b\u3055\u305b\u3089\u308c\u308b\u70b9\u306f\u5171\u901a\u3067\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001<a href=\"https:\/\/venu-sys.co.jp\/jo-sys\/9052\/\">\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0<\/a>\u306f<strong>\u4e3b\u306b<\/strong>\u30e1\u30fc\u30eb\u3084SMS\u306e\u30ea\u30f3\u30af\u304b\u3089\u8a98\u5c0e\u3059\u308b\u624b\u53e3\u3067\u3059\u3002\u6b63\u3057\u3044\u30c9\u30e1\u30a4\u30f3\u540d\u3067\u3082\u8a98\u5c0e\u3055\u308c\u308bDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3068\u306f\u3001<strong>\u88ab\u5bb3\u306e\u5165\u53e3\u304c\u9055\u3044\u307e\u3059<\/strong>\u3002<\/p>\n<p>\u3053\u3053\u304b\u3089\u8a00\u3048\u308b\u306e\u306f\u3001\u3053\u306e\u653b\u6483\u306f\u7d71\u8a08\u306e\u5206\u985e\u306e\u9593\u306b\u3042\u308a\u3001\u4ef6\u6570\u3067\u5371\u967a\u5ea6\u3092\u6e2c\u308c\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<mark>\u6570\u5b57\u304c\u7121\u3044\u3053\u3068\u306f\u3001\u88ab\u5bb3\u304c\u8d77\u304d\u3066\u3044\u306a\u3044\u8a3c\u62e0\u306b\u306f\u306a\u308a\u307e\u305b\u3093<\/mark>\u3002<\/p>\n<p style=\"font-size:13px;color:#777;margin:1em 0 0\">\u51fa\u5178: <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/security\/10threats\/omgdg50000008fi8-att\/kaisetsu_2026_soshiki.pdf\">IPA\u300c\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a310\u5927\u8105\u5a01 2026\u300d\u7d44\u7e54\u7de8 \u89e3\u8aac\u66f8<\/a>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/security\/10threats\/omgdg50000008fi8-att\/setsumei_2026_kojin.pdf\">IPA\u300c\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a310\u5927\u8105\u5a01 2026\u300d\u500b\u4eba\u5411\u3051\u8cc7\u6599\uff08PDF\uff09<\/a>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/archive\/security\/10threats\/10threats2009.html\">IPA\u300c10\u5927\u8105\u5a01 2009\u300d<\/a><\/p>\n<h2>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u5bfe\u7b56\u306f\u3001\u78ba\u8a8d\u62c5\u5f53\u8005\u3092\u6c7a\u3081\u3066\u81ea\u793e\u306e\u5bfe\u7b56\u7bc4\u56f2\u3092\u5207\u308a\u5206\u3051\u308b\u3053\u3068\u304b\u3089\u59cb\u3081\u308b<\/h2>\n<p><img decoding=\"async\" alt=\"\u62c5\u5f53\u8005\u3092\u6c7a\u3081\u308b\" src=\"https:\/\/venu-sys.co.jp\/jo-sys\/wp-content\/uploads\/sites\/2\/2026\/11\/h2-3-4.png\" \/><\/p>\n<p>\u8a2d\u5b9a\u306e\u8a71\u306b\u5165\u308b\u524d\u306b\u3001\u300c\u8ab0\u304c\u300d\u300c\u3069\u3053\u307e\u3067\u300d\u78ba\u8a8d\u3059\u308b\u304b\u3092\u6c7a\u3081\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u4e2d\u5c0f\u4f01\u696d\u7b49\u306e\u7d047\u5272\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3092\u300c\u5404\u81ea\u306e\u5bfe\u5fdc\u300d\u306b\u3068\u3069\u3081\u3066\u304a\u308a\u3001DNS\u8a2d\u5b9a\u306e\u78ba\u8a8d\u62c5\u5f53\u3092\u6c7a\u3081\u308b\u3053\u3068\u304c\u51fa\u767a\u70b9\u306b\u306a\u308b<\/h3>\n<p>DNS\u5bfe\u7b56\u306e\u51fa\u767a\u70b9\u306f\u3001DNS\u306e\u8a2d\u5b9a\u3092\u78ba\u8a8d\u3059\u308b\u62c5\u5f53\u8005\u3092\u6c7a\u3081\u308b\u3053\u3068\u3067\u3059\u3002\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3092\u7d44\u7e54\u306e\u4ed5\u4e8b\u306b\u3057\u3066\u3044\u306a\u3044\u4e2d\u5c0f\u4f01\u696d\u304c\u591a\u3044\u305f\u3081\u3067\u3059\u3002<\/p>\n<p>IPA\u306e2024\u5e74\u5ea6\u8abf\u67fb\u3067\u306f\u3001\u5bfe\u7b56\u3092\u300c\u5404\u81ea\u306e\u5bfe\u5fdc\u300d\u3068\u3057\u3066\u3044\u308b\u4e2d\u5c0f\u4f01\u696d\u7b49\u306f69.7%\u3067\u3057\u305f\u3002\u5c0f\u898f\u6a21\u4f01\u696d\u8005\u3067\u306f84.5%\u3067\u3059\u3002\u3044\u305a\u308c\u3082\u5bfe\u7b56\u5168\u822c\u306e\u6570\u5024\u3067\u3001DNS\u306b\u9650\u3063\u305f\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p><img decoding=\"async\" alt=\"\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3092\u7d44\u7e54\u7684\u306b\u884c\u308f\u305a\u300c\u5404\u81ea\u306e\u5bfe\u5fdc\u300d\u3068\u3057\u3066\u3044\u308b\u5272\u5408\uff082024\u5e74\u5ea6\uff09\" src=\"https:\/\/venu-sys.co.jp\/jo-sys\/wp-content\/uploads\/sites\/2\/2026\/11\/fig2-taisaku-taisei.png\" \/><\/p>\n<p style=\"font-size:13px;color:#777;margin:0.5em 0 0\">\u56f3\u306e\u51fa\u5178: <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/security\/reports\/sme\/nl10bi000000fbvc-att\/sme-chousa-report2024r1.pdf\">IPA\u300c2024\u5e74\u5ea6 \u4e2d\u5c0f\u4f01\u696d\u306b\u304a\u3051\u308b\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306b\u95a2\u3059\u308b\u5b9f\u614b\u8abf\u67fb \u5831\u544a\u66f8\u300d<\/a>\u306e\u30c7\u30fc\u30bf\u3092\u3082\u3068\u306b\u4f5c\u6210<\/p>\n<p>\u3053\u306e\u6570\u5024\u304b\u3089\u8aad\u307f\u53d6\u308c\u308b\u306e\u306f\u3001DNS\u306e\u8a2d\u5b9a\u78ba\u8a8d\u306e\u3088\u3046\u306a\u7d99\u7d9a\u4f5c\u696d\u306f\u3001\u62c5\u5f53\u8005\u304c\u3044\u306a\u3044\u3068\u5f8c\u56de\u3057\u306b\u306a\u308a\u3084\u3059\u3044\u70b9\u3067\u3059\u3002\u307e\u305a\u306f<mark>\u300cDNS\u306e\u8a2d\u5b9a\u3092\u8ab0\u304c\u78ba\u8a8d\u3059\u308b\u304b\u300d\u3092\u6c7a\u3081\u308b<\/mark>\u3068\u3053\u308d\u304b\u3089\u59cb\u3081\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<div style=\"border:2px solid #eb6834;border-radius:8px;background:#fdf3ee;padding:14px 18px;margin:1.5em 0\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#c2521f\">\u6ce8\u610f<\/p>\n<p style=\"margin:0\">\u300c\u5404\u81ea\u306e\u5bfe\u5fdc\u300d\u306f\u5bfe\u7b56\u30bc\u30ed\u306e\u610f\u5473\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u300269.7%\u306f\u3001\u6709\u52b9\u56de\u7b544,191\u4ef6\u306e\u3046\u30612,775\u4ef6\u3092\u5360\u3081\u308b\u5c0f\u898f\u6a21\u4f01\u696d\u8005\u306e\u5f71\u97ff\u304c\u5927\u304d\u3044\u5024\u3067\u3059\u3002\u4e2d\u5805\u4f01\u696d\u306e\u5b9f\u614b\u3068\u3057\u3066\u8aad\u307e\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n<h3>\u81ea\u793e\u3067\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u304b\u3001ISP\u3084\u30af\u30e9\u30a6\u30c9\u306e\u30ea\u30be\u30eb\u30d0\u3092\u4f7f\u3063\u3066\u3044\u308b\u304b\u3067\u5bfe\u7b56\u7bc4\u56f2\u304c\u5909\u308f\u308b<\/h3>\n<p>\u5bfe\u7b56\u7bc4\u56f2\u306f\u3001\u81ea\u793e\u3067\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3067\u5909\u308f\u308a\u307e\u3059\u3002\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u5bfe\u7b56\u3092\u8ab0\u304c\u62c5\u3046\u304b\u304c\u9055\u3046\u305f\u3081\u3067\u3059\u3002<\/p>\n<p>\u793e\u5185\u306eDNS\u30b5\u30fc\u30d0\u30fc\u3001Active Directory\u306eDNS\u3001UTM\u30fb\u30eb\u30fc\u30bf\u30fc\u306eDNS\u30d5\u30a9\u30ef\u30fc\u30c0\u30fc\u6a5f\u80fd\u306f\u81ea\u793e\u904b\u7528\u3067\u3059\u3002\u6b21\u306e\u7ae0\u306e5\u3064\u306e\u5bfe\u7b56\u3059\u3079\u3066\u304c\u5bfe\u8c61\u3067\u3059\u3002<\/p>\n<p>ISP\u3084\u30d1\u30d6\u30ea\u30c3\u30afDNS\u3001\u30af\u30e9\u30a6\u30c9\u306e\u30ea\u30be\u30eb\u30d0\u3092\u4f7f\u3063\u3066\u3044\u308b\u5834\u5408\u3001<strong>\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u5bfe\u7b56\u306f\u4e8b\u696d\u8005\u306e\u5f79\u5272<\/strong>\u3067\u3059\u3002\u793e\u5185\u3067\u306f\u3001\u53c2\u7167\u5148\u306e\u78ba\u8a8d\u3068\u5229\u7528\u8005\u5074\u306e\u5bfe\u7b56\u306b\u96c6\u4e2d\u3057\u307e\u3057\u3087\u3046\u3002\u3069\u3061\u3089\u306b\u5f53\u305f\u308b\u304b\u306f\u6b21\u306e\u5834\u6240\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u30eb\u30fc\u30bf\u30fc\u3084UTM\u306e\u7ba1\u7406\u753b\u9762\u306eDNS\u8a2d\u5b9a<\/li>\n<li>DHCP\u3067\u7aef\u672b\u306b\u914d\u5e03\u3057\u3066\u3044\u308bDNS\u30b5\u30fc\u30d0\u30fc\u306e\u30a2\u30c9\u30ec\u30b9<\/li>\n<li>\u7aef\u672b\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u306b\u3042\u308b\u53c2\u7167\u5148\u306eDNS\u30b5\u30fc\u30d0\u30fc<\/li>\n<\/ul>\n<p style=\"font-size:13px;color:#777;margin:1em 0 0\">\u51fa\u5178: <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/security\/reports\/sme\/nl10bi000000fbvc-att\/sme-chousa-report2024r1.pdf\">IPA\u300c2024\u5e74\u5ea6 \u4e2d\u5c0f\u4f01\u696d\u306b\u304a\u3051\u308b\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306b\u95a2\u3059\u308b\u5b9f\u614b\u8abf\u67fb \u5831\u544a\u66f8\u300d<\/a><\/p>\n<h2>\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u3092\u904b\u7528\u3059\u308b\u4f01\u696d\u304c\u3068\u308b\u3079\u304d\u5bfe\u7b56\u306f5\u3064<\/h2>\n<p><img decoding=\"async\" alt=\"\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u5bfe\u7b565\u9078\" src=\"https:\/\/venu-sys.co.jp\/jo-sys\/wp-content\/uploads\/sites\/2\/2026\/11\/h2-4-4.png\" \/><\/p>\n<p>\u81ea\u793e\u3067\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u6b21\u306e5\u3064\u306e\u5bfe\u7b56\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li>DNS\u30b5\u30fc\u30d0\u30fc\u3068\u30eb\u30fc\u30bf\u30fc\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092\u6700\u65b0\u306b\u4fdd\u3064<\/li>\n<li>\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3092\u6709\u52b9\u306b\u3059\u308b<\/li>\n<li>DNSSEC\u691c\u8a3c\u3092\u6709\u52b9\u306b\u3059\u308b<\/li>\n<li>\u518d\u5e30\u554f\u3044\u5408\u308f\u305b\u3092\u53d7\u3051\u4ed8\u3051\u308b\u7bc4\u56f2\u3092\u793e\u5185\u306b\u9650\u5b9a\u3059\u308b<\/li>\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u4fdd\u6301\u6642\u9593\uff08TTL\uff09\u306e\u4e0a\u9650\u3092\u898b\u76f4\u3059<\/li>\n<\/ul>\n<p>\u4e00\u3064\u3060\u3051\u3067\u5b8c\u5168\u306b\u9632\u3052\u308b\u5bfe\u7b56\u306f\u7121\u3044\u305f\u3081\u3001\u7d44\u307f\u5408\u308f\u305b\u3066\u653b\u6483\u304c\u6210\u7acb\u3057\u306b\u304f\u3044\u72b6\u614b\u3092\u3064\u304f\u308a\u307e\u3059\u3002<\/p>\n<h3>DNS\u30b5\u30fc\u30d0\u30fc\u3068\u30eb\u30fc\u30bf\u30fc\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092\u6700\u65b0\u306b\u4fdd\u3061\u3001\u65e2\u5b58\u306e\u66f4\u65b0\u7ba1\u7406\u306e\u5bfe\u8c61\u306b\u542b\u3081\u308b<\/h3>\n<p>\u6700\u521d\u306b\u53d6\u308a\u7d44\u307f\u305f\u3044\u306e\u306f\u3001DNS\u30b5\u30fc\u30d0\u30fc\u3068\u30eb\u30fc\u30bf\u30fc\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092\u6700\u65b0\u306b\u4fdd\u3064\u3053\u3068\u3067\u3059\u3002\u88fd\u54c1\u306b\u8106\u5f31\u6027\u304c\u6b8b\u3063\u3066\u3044\u308b\u3068\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u304c\u6210\u7acb\u3057\u3084\u3059\u304f\u306a\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<p><strong>IPA\u306e2024\u5e74\u5ea6\u8abf\u67fb\uff082024\u5e7410\u301c11\u6708\u5b9f\u65bd\uff09\u3067\u306f\u30012023\u5e74\u5ea6\u306b<\/strong>\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u88ab\u5bb3\u3092\u53d7\u3051\u305f\u4e2d\u5c0f\u4f01\u696d\u7b49\u306f10.0%\u3067\u3057\u305f\u3002\u88ab\u5bb3\u4f01\u696d\uff08\u56de\u7b54419\u4ef6\u3001\u8907\u6570\u56de\u7b54\uff09\u306e\u3046\u3061\u3001\u624b\u53e3\u304c\u300c<a href=\"https:\/\/venu-sys.co.jp\/jo-sys\/8758\/\">\u8106\u5f31\u6027<\/a>\u300d\u3060\u3063\u305f\u306e\u306f48.0%\u3067\u3059\u3002\u8aad\u8005\u5c64\u306b\u8fd1\u3044\u4e2d\u5c0f\u4f01\u696d\u7b49\u306e\u8abf\u67fb\u3067\u3059\u304c\u3001\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u5168\u822c\u306e\u6570\u5024\u3067\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u6570\u5024\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u306e\u7d50\u679c\u304b\u3089\u8aad\u307f\u53d6\u308c\u308b\u306e\u306f\u3001\u65e2\u77e5\u306e\u8106\u5f31\u6027\u3092\u653e\u7f6e\u3057\u306a\u3044\u3053\u3068\u304cDNS\u5bfe\u7b56\u306b\u3082\u5171\u901a\u3059\u308b\u57fa\u672c\u3060\u3068\u3044\u3046\u70b9\u3067\u3059\u3002<strong>\u30d1\u30c3\u30c1\u9069\u7528\u3084\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u66f4\u65b0\u306e\u5bfe\u8c61\u30ea\u30b9\u30c8\u306b\u3001DNS\u30b5\u30fc\u30d0\u30fc\u30fb\u30eb\u30fc\u30bf\u30fc\u30fbUTM\u3092\u52a0\u3048\u307e\u3057\u3087\u3046<\/strong>\u3002\u306a\u304a\u3001\u624b\u53e3\u306e\u9806\u4f4d\u306f\u8abf\u67fb\u306b\u3088\u3063\u3066\u5165\u308c\u66ff\u308f\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3092\u6709\u52b9\u306b\u3057\u3066\u3001\u507d\u306e\u5fdc\u7b54\u3092\u5f53\u3066\u306b\u304f\u304f\u3059\u308b<\/h3>\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u3067\u306f\u3001\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u304c\u6709\u52b9\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002\u554f\u3044\u5408\u308f\u305b\u306e\u305f\u3073\u306b\u3001\u9001\u4fe1\u5143\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u3092\u5909\u3048\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n<p>\u507d\u306e\u5fdc\u7b54\u3092\u53d7\u3051\u5165\u308c\u3055\u305b\u308b\u306b\u306f\u3001<strong>\u554f\u3044\u5408\u308f\u305bID\u3084\u9001\u4fe1\u5143\u30dd\u30fc\u30c8\u756a\u53f7\u304c<\/strong>\u554f\u3044\u5408\u308f\u305b\u3068\u4e00\u81f4\u3059\u308b\u5fdc\u7b54\u3092\u9001\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30dd\u30fc\u30c8\u756a\u53f7\u304c\u6bce\u56de\u5909\u308f\u308c\u3070\u3001\u653b\u6483\u8005\u306f\u4e00\u81f4\u3059\u308b\u7d44\u307f\u5408\u308f\u305b\u3092\u5f53\u3066\u306b\u304f\u304f\u306a\u308a\u307e\u3059\u3002<strong>\u305f\u3060\u3057\u3001\u6210\u529f\u306e\u78ba\u7387\u3092\u4e0b\u3052\u308b\u7de9\u548c\u7b56\u3067\u3042\u308a\u3001\u6839\u672c\u7684\u306a\u5bfe\u7b56\u306fDNSSEC\u3067\u3059<\/strong>\u3002<\/p>\n<p>\u4e3b\u8981\u306aDNS\u30b5\u30fc\u30d0\u30fc\u30bd\u30d5\u30c8\u3067\u306f\u3001\u6a19\u6e96\u3067\u6709\u52b9\u306a\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u53e4\u3044\u88fd\u54c1\u3084\u3001NAT\u30fb\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3067\u30dd\u30fc\u30c8\u304c\u56fa\u5b9a\u3055\u308c\u308b\u69cb\u6210\u3067\u306f\u52b9\u679c\u304c\u843d\u3061\u307e\u3059\u3002\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306b\u30dd\u30fc\u30c8\u56fa\u5b9a\u306e\u6307\u5b9a\u304c\u7121\u3044\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002\u5916\u90e8\u306e\u78ba\u8a8d\u30b5\u30fc\u30d3\u30b9\u3067\u3001<strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u3092\u901a\u3063\u305f\u5f8c\u3082\u30dd\u30fc\u30c8\u304c\u3070\u3089\u3064\u3044\u3066\u3044\u308b\u304b<\/strong>\u3082\u78ba\u304b\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>DNSSEC\u691c\u8a3c\u3092\u6709\u52b9\u306b\u3057\u3066\u3001\u5fdc\u7b54\u304c\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3092\u78ba\u304b\u3081\u308b<\/h3>\n<p>DNSSEC\u306f\u3001DNS\u306e\u5fdc\u7b54\u306b\u96fb\u5b50\u7f72\u540d\u3092\u4ed8\u3051\u3001\u53d7\u3051\u53d6\u3063\u305f\u5074\u3067\u6b63\u3057\u3055\u3092\u691c\u8a3c\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u3067\u691c\u8a3c\u3092\u6709\u52b9\u306b\u3059\u308b\u3068\u3001\u6539\u3056\u3093\u3055\u308c\u305f\u5fdc\u7b54\u3092\u53d7\u3051\u5165\u308c\u306b\u304f\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4f5c\u696d\u306f2\u7a2e\u985e\u3042\u308a\u307e\u3059\u3002\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u5074\u3067\u5fdc\u7b54\u3092\u300c\u691c\u8a3c\u300d\u3059\u308b\u4f5c\u696d\u3068\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u306e\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u30fc\u5074\u3067\u300c\u7f72\u540d\u300d\u3059\u308b\u4f5c\u696d\u3067\u3059\u3002<\/p>\n<p>\u7f72\u540d\u3055\u308c\u3066\u3044\u306a\u3044\u30c9\u30e1\u30a4\u30f3\u306b\u306f\u691c\u8a3c\u304c\u52b9\u304b\u306a\u3044\u305f\u3081\u3001\u307b\u304b\u306e\u5bfe\u7b56\u3068\u306e\u4f75\u7528\u304c\u524d\u63d0\u3067\u3059\u3002\u7f72\u540d\u5074\u306f\u9375\u306e\u66f4\u65b0\u306a\u3069\u904b\u7528\u306e\u624b\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u3002\u5c11\u4eba\u6570\u306e\u4f53\u5236\u306a\u3089\u3001<strong>\u307e\u305a\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u691c\u8a3c\u3092\u6709\u52b9\u306b\u3059\u308b<\/strong>\u306e\u304c\u73fe\u5b9f\u7684\u3067\u3059\u3002<strong>\u691c\u8a3c\u5074\u3067\u3082\u3001\u30c8\u30e9\u30b9\u30c8\u30a2\u30f3\u30ab\u30fc\uff08\u30eb\u30fc\u30c8\u30be\u30fc\u30f3\u306e\u516c\u958b\u9375\uff09\u306e\u8a2d\u5b9a\u30fb\u66f4\u65b0\u304c\u5fc5\u8981\u3067\u3001\u691c\u8a3c\u306b\u5931\u6557\u3057\u305f\u5fdc\u7b54\u306f\u540d\u524d\u89e3\u6c7a\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002\u30b5\u30fc\u30d0\u30fc\u306e\u8ca0\u8377\u3082\u4e0a\u304c\u308b\u305f\u3081\u3001\u4e8b\u524d\u306b\u52d5\u4f5c\u3092\u78ba\u8a8d\u3057\u3066\u304b\u3089\u6709\u52b9\u306b\u3057\u307e\u3057\u3087\u3046<\/strong>\u3002<\/p>\n<h3>\u518d\u5e30\u554f\u3044\u5408\u308f\u305b\u3092\u53d7\u3051\u4ed8\u3051\u308b\u7bc4\u56f2\u3092\u793e\u5185\u306b\u9650\u5b9a\u3057\u3001\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u306b\u3057\u306a\u3044<\/h3>\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u793e\u5185\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u3060\u3051\u306b\u7b54\u3048\u308b\u8a2d\u5b9a\u306b\u3057\u307e\u3057\u3087\u3046\u3002\u8ab0\u304b\u3089\u3067\u3082\u554f\u3044\u5408\u308f\u305b\u3092\u53d7\u3051\u4ed8\u3051\u308b\u72b6\u614b\u3092\u300c\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u300d\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n<p>\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u306f\u5916\u90e8\u304b\u3089\u81ea\u7531\u306b\u554f\u3044\u5408\u308f\u305b\u3092\u9001\u308c\u308b\u305f\u3081\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3092\u8a66\u307f\u3089\u308c\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002DDoS\u653b\u6483\u306e\u8e0f\u307f\u53f0\u306b\u60aa\u7528\u3055\u308c\u308b\u304a\u305d\u308c\u3082\u3042\u308a\u307e\u3059\u3002<strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u306b\u7d44\u307f\u8fbc\u307e\u308c\u305fDNS\u6a5f\u80fd\u304c\u3001\u6c17\u3065\u304b\u306a\u3044\u3046\u3061\u306b\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u306b\u306a\u3063\u3066\u3044\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059<\/strong>\u3002<\/p>\n<p>\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3067\u793e\u5185\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u3060\u3051\u3092\u8a31\u53ef\u3057\u3001<a href=\"https:\/\/venu-sys.co.jp\/jo-sys\/10846\/\">\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/a>\u3067\u5916\u90e8\u304b\u3089\u306eDNS\u554f\u3044\u5408\u308f\u305b\u3092\u906e\u65ad\u3057\u307e\u3059\u3002<strong>\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u30fc\u3068\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u30921\u53f0\u3067\u517c\u306d\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u512a\u5148\u3057\u3066\u5206\u3051\u307e\u3057\u3087\u3046<\/strong>\u3002<\/p>\n<h3>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u4fdd\u6301\u6642\u9593\uff08TTL\uff09\u306e\u4e0a\u9650\u3092\u898b\u76f4\u3057\u3001\u6c5a\u67d3\u304c\u6b8b\u308b\u6642\u9593\u3092\u77ed\u304f\u3059\u308b<\/h3>\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u4fdd\u6301\u6642\u9593\uff08TTL\uff09\u306e\u4e0a\u9650\u3082\u78ba\u8a8d\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002\u507d\u306e\u60c5\u5831\u304c\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u5165\u308b\u3068\u3001\u4fdd\u6301\u6642\u9593\u304c\u5207\u308c\u308b\u307e\u3067\u8aa4\u3063\u305f\u5fdc\u7b54\u304c\u8fd4\u308a\u7d9a\u3051\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<p>\u591a\u304f\u306e\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u3067\u306f\u3001\u4fdd\u6301\u6642\u9593\u306e\u4e0a\u9650\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u77ed\u304f\u3057\u3059\u304e\u308b\u3068\u554f\u3044\u5408\u308f\u305b\u304c\u5897\u3048\u3066\u8ca0\u8377\u304c\u4e0a\u304c\u308a\u307e\u3059\u3002<strong>\u88fd\u54c1\u306e\u521d\u671f\u5024\u3068\u6bd4\u3079\u3001\u610f\u56f3\u305b\u305a\u9577\u3044\u5024\u306b\u306a\u3063\u3066\u3044\u306a\u3044\u304b<\/strong>\u3092\u78ba\u304b\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u3053\u3053\u307e\u3067\u306e5\u3064\u306e\u5bfe\u7b56\u306f\u3001\u6b21\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3067\u70b9\u691c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div style=\"border:2px solid #2d4f8f;border-radius:8px;background:#f2f5fb;padding:14px 18px;margin:1.5em 0\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#2d4f8f\">\u30dd\u30a4\u30f3\u30c8<\/p>\n<ul style=\"margin:0;padding-left:20px\">\n<li>DNS\u30b5\u30fc\u30d0\u30fc\u30fb\u30eb\u30fc\u30bf\u30fc\u30fbUTM\u304c\u3001\u66f4\u65b0\u7ba1\u7406\u306e\u5bfe\u8c61\u30ea\u30b9\u30c8\u306b\u5165\u3063\u3066\u3044\u308b<\/li>\n<li>\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u304c\u6709\u52b9\u3067\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u3092\u901a\u3063\u305f\u5f8c\u3082\u30dd\u30fc\u30c8\u304c\u3070\u3089\u3064\u3044\u3066\u3044\u308b<\/li>\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u3067\u3001DNSSEC\u691c\u8a3c\u304c\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u308b<\/li>\n<li>\u518d\u5e30\u554f\u3044\u5408\u308f\u305b\u3092\u793e\u5185\u304b\u3089\u306b\u9650\u5b9a\u3057\u3001\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u30fc\u3068\u5206\u3051\u3066\u3044\u308b<\/li>\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u4fdd\u6301\u6642\u9593\u306e\u4e0a\u9650\u3092\u3001\u88fd\u54c1\u306e\u521d\u671f\u5024\u3068\u6bd4\u3079\u3066\u78ba\u8a8d\u3057\u305f<\/li>\n<\/ul>\n<\/div>\n<p style=\"font-size:13px;color:#777;margin:1em 0 0\">\u51fa\u5178: <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/security\/reports\/sme\/nl10bi000000fbvc-att\/sme-chousa-report2024r1.pdf\">IPA\u300c2024\u5e74\u5ea6 \u4e2d\u5c0f\u4f01\u696d\u306b\u304a\u3051\u308b\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306b\u95a2\u3059\u308b\u5b9f\u614b\u8abf\u67fb \u5831\u544a\u66f8\u300d<\/a>\uff0f\u53c2\u8003: <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/at\/2014\/at140016.html\">JPCERT\/CC\u300cDNS \u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u653b\u6483\u306b\u95a2\u3059\u308b\u6ce8\u610f\u559a\u8d77\u300d<\/a>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/at\/2013\/at130022.html\">JPCERT\/CC\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>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.soumu.go.jp\/main_sosiki\/joho_tsusin\/security_previous\/download\/juyogijutsu.pdf\">\u7dcf\u52d9\u7701\u300cDNS\u306e\u4ed5\u7d44\u307f\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u8105\u5a01\u30fbDNSSEC\u300d\u89e3\u8aac\u8cc7\u6599\uff08PDF\uff09<\/a><\/p>\n<h2>\u5229\u7528\u8005\u5074\u306e\u5bfe\u7b56\u3068\u65e5\u5e38\u306e\u76e3\u8996\u3067\u3001\u507d\u30b5\u30a4\u30c8\u3078\u306e\u8a98\u5c0e\u306b\u3088\u308b\u88ab\u5bb3\u3092\u9632\u3050<\/h2>\n<p><img decoding=\"async\" alt=\"\u5229\u7528\u8005\u5074\u306e\u5bfe\u7b56\u3068\u76e3\u8996\" src=\"https:\/\/venu-sys.co.jp\/jo-sys\/wp-content\/uploads\/sites\/2\/2026\/11\/h2-5-4.png\" \/><\/p>\n<p>\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u5bfe\u7b56\u3092\u3057\u3066\u3044\u3066\u3082\u3001\u653b\u6483\u3092\u5b8c\u5168\u306b\u9632\u3052\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u3053\u3053\u3067\u306f\u3001\u8a98\u5c0e\u3055\u308c\u305f\u3068\u304d\u306e\u88ab\u5bb3\u3092\u5c0f\u3055\u304f\u3059\u308b\u5bfe\u7b56\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u3092\u81ea\u793e\u3067\u904b\u7528\u3057\u3066\u3044\u306a\u3044\u4f01\u696d\u3067\u3082\u5b9f\u65bd\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u591a\u8981\u7d20\u8a8d\u8a3c\u3092\u5c0e\u5165\u3057\u3001\u507d\u30b5\u30a4\u30c8\u3067\u76d7\u307e\u308c\u305fID\u30fb\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u60aa\u7528\u3055\u308c\u306b\u304f\u304f\u3059\u308b<\/h3>\n<p>\u507d\u30b5\u30a4\u30c8\u3067\u76d7\u307e\u308c\u305fID\u30fb\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u60aa\u7528\u3092\u9632\u3050\u306b\u306f\u3001\u591a\u8981\u7d20\u8a8d\u8a3c\u304c\u6709\u52b9\u3067\u3059\u3002\u507d\u30b5\u30a4\u30c8\u306b\u8a98\u5c0e\u3055\u308c\u305f\u3068\u304d\u306e\u4e3b\u306a\u88ab\u5bb3\u306f\u3001\u8a8d\u8a3c\u60c5\u5831\u3092\u76d7\u307e\u308c\u308b\u3053\u3068\u3060\u304b\u3089\u3067\u3059\u3002<\/p>\n<p><strong>IPA\u306e2024\u5e74\u5ea6\u8abf\u67fb\u3067\u30012023\u5e74\u5ea6\u306b<\/strong>\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u88ab\u5bb3\u3092\u53d7\u3051\u305f\u4e2d\u5c0f\u4f01\u696d\u7b49\uff08\u56de\u7b54419\u4ef6\u3001\u8907\u6570\u56de\u7b54\uff09\u306e\u624b\u53e3\u3092\u898b\u3066\u307f\u307e\u3059\u3002\u300cID\u30fb\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u4e0d\u6b63\u5229\u7528\u306b\u3088\u308b\u306a\u308a\u3059\u307e\u3057\u300d\u306f36.8%\u3067\u3057\u305f\u3002\u3053\u308c\u3082\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u5168\u822c\u306e\u6570\u5024\u3067\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u5185\u8a33\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u306e\u6570\u5024\u304b\u3089\u8aad\u307f\u53d6\u308c\u308b\u306e\u306f\u3001\u76d7\u307e\u308c\u305f\u8a8d\u8a3c\u60c5\u5831\u306e\u60aa\u7528\u304c<strong>\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9<\/strong>\u88ab\u5bb3\u306e\u4e3b\u306a\u5165\u53e3\u306e\u4e00\u3064\u3060\u3068\u3044\u3046\u70b9\u3067\u3059\u3002\u624b\u53e3\u306e\u9806\u4f4d\u306f\u8abf\u67fb\u3067\u5909\u308f\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<strong>\u30d1\u30b9\u30ef\u30fc\u30c9\u3060\u3051\u3067\u306f\u30ed\u30b0\u30a4\u30f3\u3067\u304d\u306a\u3044\u72b6\u614b\u306b\u3057\u3066\u304a\u3051\u3070\u3001DNS\u304c\u539f\u56e0\u304b\u3069\u3046\u304b\u306b\u95a2\u308f\u3089\u305a\u88ab\u5bb3\u3092\u9632\u304e\u3084\u3059\u304f\u306a\u308a\u307e\u3059<\/strong>\u3002<\/p>\n<h3>HTTPS\u306e\u8a3c\u660e\u66f8\u8b66\u544a\u3092\u7121\u8996\u3057\u306a\u3044\u3088\u3046\u3001\u793e\u5185\u306b\u5468\u77e5\u3059\u308b<\/h3>\n<p>\u30d6\u30e9\u30a6\u30b6\u306e\u8a3c\u660e\u66f8\u8b66\u544a\u306f\u3001\u507d\u30b5\u30a4\u30c8\u306b\u6c17\u3065\u304f\u305f\u3081\u306e\u5927\u5207\u306a\u624b\u304c\u304b\u308a\u3067\u3059\u3002\u507d\u306e\u30b5\u30fc\u30d0\u30fc\u306f\u901a\u5e38\u3001\u6b63\u898f\u30c9\u30e1\u30a4\u30f3\u306e\u6b63\u3057\u3044\u8a3c\u660e\u66f8\u3092\u7528\u610f\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u8b66\u544a\u304c\u51fa\u308b\u3053\u3068\u304c\u591a\u3044\u306e\u3067\u3059\u3002<\/p>\n<p>\u305f\u3060\u3001\u8b66\u544a\u306e\u610f\u5473\u3092\u77e5\u3089\u306a\u3044\u5229\u7528\u8005\u306f\u3001\u305d\u306e\u307e\u307e\u5148\u306b\u9032\u3093\u3067\u3057\u307e\u3044\u304c\u3061\u3067\u3059\u3002<strong>\u300c\u8b66\u544a\u304c\u51fa\u305f\u3089\u5148\u306b\u9032\u307e\u305a\u3001\u60c5\u30b7\u30b9\u306b\u9023\u7d61\u3059\u308b\u300d<\/strong>\u3068\u3044\u3046\u30eb\u30fc\u30eb\u3092\u3001\u753b\u9762\u306e\u4f8b\u3068\u4e00\u7dd2\u306b\u5468\u77e5\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u306a\u304a\u3001HTTP\u306e\u307e\u307e\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u8b66\u544a\u304c\u51fa\u307e\u305b\u3093\u3002\u793e\u5185\u30b7\u30b9\u30c6\u30e0\u306eHTTPS\u5316\u3082\u3042\u308f\u305b\u3066\u9032\u3081\u3066\u304a\u304f\u3053\u3068\u304c\u524d\u63d0\u3067\u3059\u3002<\/p>\n<h3>DNS\u306e\u5fdc\u7b54\u3068\u30ed\u30b0\u3092\u5b9a\u671f\u7684\u306b\u78ba\u8a8d\u3057\u3001\u7570\u5e38\u306b\u65e9\u304f\u6c17\u3065\u3051\u308b\u72b6\u614b\u306b\u3059\u308b<\/h3>\n<p>DNS\u306e\u7570\u5e38\u306b\u65e9\u304f\u6c17\u3065\u304f\u306b\u306f\u3001\u540d\u524d\u89e3\u6c7a\u306e\u7d50\u679c\u3068\u30ed\u30b0\u3092\u5b9a\u671f\u7684\u306b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002\u6c5a\u67d3\u3055\u308c\u305f\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3001\u6c17\u3065\u304b\u306a\u3051\u308c\u3070\u4fdd\u6301\u6642\u9593\u304c\u5207\u308c\u308b\u307e\u3067\u4f7f\u308f\u308c\u7d9a\u3051\u307e\u3059\u3002<\/p>\n<p>\u81ea\u793e\u904b\u7528\u306e\u5834\u5408\u306f\u3001\u77ed\u6642\u9593\u306b\u5927\u91cf\u306e\u5fdc\u7b54\u304c\u5c4a\u3044\u3066\u3044\u306a\u3044\u304b\u3092\u30ed\u30b0\u3067\u78ba\u8a8d\u3057\u307e\u3059\u3002<strong>\u305f\u3060\u3057\u3001\u653b\u6483\u306e\u901a\u4fe1\u306f\u898b\u305f\u76ee\u304c\u901a\u5e38\u306eDNS\u5fdc\u7b54\u3068\u540c\u3058\u305f\u3081\u3001\u30ed\u30b0\u3060\u3051\u3067\u898b\u5206\u3051\u308b\u306e\u306f\u5bb9\u6613\u3067\u306f\u3042\u308a\u307e\u305b\u3093<\/strong>\u3002\u3042\u308f\u305b\u3066\u3001\u81ea\u793e\u30b5\u30a4\u30c8\u30fb\u30e1\u30fc\u30eb\u30fbSaaS\u306a\u3069\u91cd\u8981\u30c9\u30e1\u30a4\u30f3\u306e\u540d\u524d\u89e3\u6c7a\u7d50\u679c\u3068\u3001\u7aef\u672b\u3084\u30eb\u30fc\u30bf\u30fc\u306eDNS\u8a2d\u5b9a\u306b\u5909\u5316\u304c\u7121\u3044\u304b\u3092\u70b9\u691c\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><strong>\u81ea\u793e\u3067\u30b5\u30fc\u30d0\u30fc\u3092\u904b\u7528\u3057\u3066\u3044\u306a\u3044\u4f01\u696d\u3067\u3082\u3001\u91cd\u8981\u30c9\u30e1\u30a4\u30f3\u306e\u540d\u524d\u89e3\u6c7a\u7d50\u679c\u3092\u6642\u3005\u78ba\u8a8d\u3059\u308b\u3060\u3051\u3067\u76e3\u8996\u306b\u306a\u308a\u307e\u3059<\/strong>\u3002<\/p>\n<div style=\"border:2px solid #2d4f8f;border-radius:8px;background:#f2f5fb;padding:14px 18px;margin:1.5em 0\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#2d4f8f\">\u30dd\u30a4\u30f3\u30c8<\/p>\n<ul style=\"margin:0;padding-left:20px\">\n<li>\u30e1\u30fc\u30eb\u3084SaaS\u306e\u7ba1\u7406\u8005\u30a2\u30ab\u30a6\u30f3\u30c8\u304b\u3089\u3001\u591a\u8981\u7d20\u8a8d\u8a3c\u3092\u8a2d\u5b9a\u3059\u308b<\/li>\n<li>\u8a3c\u660e\u66f8\u8b66\u544a\u304c\u51fa\u305f\u3089\u5148\u306b\u9032\u307e\u305a\u3001\u60c5\u30b7\u30b9\u306b\u9023\u7d61\u3059\u308b\u30eb\u30fc\u30eb\u3092\u5468\u77e5\u3059\u308b<\/li>\n<li>\u91cd\u8981\u30c9\u30e1\u30a4\u30f3\u306e\u540d\u524d\u89e3\u6c7a\u7d50\u679c\u3068\u3001\u7aef\u672b\u30fb\u30eb\u30fc\u30bf\u30fc\u306eDNS\u8a2d\u5b9a\u3092\u5b9a\u671f\u7684\u306b\u78ba\u8a8d\u3059\u308b<\/li>\n<\/ul>\n<\/div>\n<p style=\"font-size:13px;color:#777;margin:1em 0 0\">\u51fa\u5178: <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/security\/reports\/sme\/nl10bi000000fbvc-att\/sme-chousa-report2024r1.pdf\">IPA\u300c2024\u5e74\u5ea6 \u4e2d\u5c0f\u4f01\u696d\u306b\u304a\u3051\u308b\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306b\u95a2\u3059\u308b\u5b9f\u614b\u8abf\u67fb \u5831\u544a\u66f8\u300d<\/a>\uff0f\u53c2\u8003: <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.soumu.go.jp\/main_sosiki\/joho_tsusin\/security_previous\/download\/juyogijutsu.pdf\">\u7dcf\u52d9\u7701\u300cDNS\u306e\u4ed5\u7d44\u307f\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u8105\u5a01\u30fbDNSSEC\u300d\u89e3\u8aac\u8cc7\u6599\uff08PDF\uff09<\/a><\/p>\n<h2>\u507d\u30b5\u30a4\u30c8\u3078\u306e\u8a98\u5c0e\u304c\u7591\u308f\u308c\u305f\u3089\u3001Web\u30b5\u30fc\u30d0\u30fc\u3088\u308a\u5148\u306bDNS\u306e\u5fdc\u7b54\u3092\u78ba\u8a8d\u3059\u308b<\/h2>\n<p><img decoding=\"async\" alt=\"\u6539\u3056\u3093\u3068\u306e\u5207\u308a\u5206\u3051\" src=\"https:\/\/venu-sys.co.jp\/jo-sys\/wp-content\/uploads\/sites\/2\/2026\/11\/h2-6.png\" \/><\/p>\n<p>\u300c\u6b63\u3057\u3044URL\u306a\u306e\u306b\u304a\u304b\u3057\u306a\u5185\u5bb9\u304c\u51fa\u308b\u300d\u3068\u3044\u3046\u75c7\u72b6\u306f\u3001Web\u30b5\u30fc\u30d0\u30fc\u5074\u3068DNS\u5074\u306e\u3069\u3061\u3089\u3067\u3082\u8d77\u3053\u308a\u307e\u3059\u3002<\/p>\n<h3>Web\u30b5\u30a4\u30c8\u6539\u3056\u3093\u306e\u5831\u544a\u4ef6\u6570\u306f2025\u5e744\u301c9\u6708\u306b\u6025\u5897\u3057\u305f\u304c\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3068\u306f\u539f\u56e0\u306e\u5834\u6240\u304c\u9055\u3046<\/h3>\n<p>\u4f3c\u305f\u75c7\u72b6\u3067\u516c\u7684\u306a\u4ef6\u6570\u304c\u5206\u304b\u308b\u306e\u306fWeb\u30b5\u30a4\u30c8\u6539\u3056\u3093\u3067\u3059\u304c\u3001\u539f\u56e0\u306e\u5834\u6240\u306fDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3068\u9055\u3044\u307e\u3059\u3002<\/p>\n<p>JPCERT\/CC\u3078\u306e\u6539\u3056\u3093\u5831\u544a\u306f2025\u5e744\u301c9\u6708\u306b\u6025\u5897\u3057\u3001\u524d\u5e74\u540c\u671f\uff082024\u5e744\u301c9\u6708\uff09\u3092\u5927\u304d\u304f\u4e0a\u56de\u308a\u307e\u3057\u305f\u3002<strong>2024\u5e741\u301c3\u6708\u304b\u30892026\u5e744\u301c6\u6708\u307e\u3067<\/strong>\u306e\u63a8\u79fb\u306f\u6b21\u306e\u8868\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u671f\u9593<\/th>\n<th>Web\u30b5\u30a4\u30c8\u6539\u3056\u3093\u306e\u5831\u544a\u4ef6\u6570<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>2024\u5e741\u301c3\u6708<\/td>\n<td>57\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>2024\u5e744\u301c6\u6708<\/td>\n<td>43\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>2024\u5e747\u301c9\u6708<\/td>\n<td>93\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>2024\u5e7410\u301c12\u6708<\/td>\n<td>53\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>2025\u5e741\u301c3\u6708<\/td>\n<td>95\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>2025\u5e744\u301c6\u6708<\/td>\n<td>231\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>2025\u5e747\u301c9\u6708<\/td>\n<td>319\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>2025\u5e7410\u301c12\u6708<\/td>\n<td>105\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>2026\u5e741\u301c3\u6708<\/td>\n<td>90\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>2026\u5e744\u301c6\u6708<\/td>\n<td>181\u4ef6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img decoding=\"async\" alt=\"JPCERT\/CC\u3078\u306eWeb\u30b5\u30a4\u30c8\u6539\u3056\u3093\u5831\u544a\u4ef6\u6570\u306e\u56db\u534a\u671f\u63a8\u79fb\" src=\"https:\/\/venu-sys.co.jp\/jo-sys\/wp-content\/uploads\/sites\/2\/2026\/11\/fig1-webtamper.png\" \/><\/p>\n<p style=\"font-size:13px;color:#777;margin:0.5em 0 0\">\u8868\u30fb\u56f3\u306e\u51fa\u5178: JPCERT\/CC\u300c\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5831\u544a\u5bfe\u5fdc\u30ec\u30dd\u30fc\u30c8\u300d<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/pr\/2024\/IR_Report2023Q4.pdf\">2024\u5e741\u301c3\u6708<\/a>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/pr\/2024\/IR_Report2024Q1.pdf\">2024\u5e744\u301c6\u6708<\/a>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/pr\/2024\/IR_Report2024Q2.pdf\">2024\u5e747\u301c9\u6708<\/a>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/pr\/2025\/IR_Report2024Q3.pdf\">2024\u5e7410\u301c12\u6708<\/a>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/pr\/2025\/IR_Report2024Q4.pdf\">2025\u5e741\u301c3\u6708<\/a>\u3001<b>JPCERT\/CC\u300c\u56db\u534a\u671f\u30ec\u30dd\u30fc\u30c8\u300d<\/b><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/qr\/2025\/QR_FY2025-Q1.pdf\">2025\u5e744\u301c6\u6708<\/a>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/qr\/2025\/QR_FY2025-Q2.pdf\">2025\u5e747\u301c9\u6708<\/a>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/qr\/2026\/QR_FY2025-Q3.pdf\">2025\u5e7410\u301c12\u6708<\/a>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/qr\/2026\/QR_FY2025-Q4.pdf\">2026\u5e741\u301c3\u6708<\/a>\uff0f<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/qr\/2026\/QR_FY2026-Q1.pdf\">2026\u5e744\u301c6\u6708<\/a>\u306e\u30c7\u30fc\u30bf\u3092\u3082\u3068\u306b\u4f5c\u6210<\/p>\n<p>\u6539\u3056\u3093\u306f\u30b5\u30fc\u30d0\u30fc\u4e0a\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u66f8\u304d\u63db\u3048\u3067\u3059\uff08JPCERT\/CC\u306e\u5b9a\u7fa9\uff09\u3002DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3067\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u306f\u6b63\u5e38\u306a\u307e\u307e\u554f\u3044\u5408\u308f\u305b\u5074\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u6c5a\u67d3\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u63a8\u79fb\u3068\u5b9a\u7fa9\u304b\u3089\u8aad\u307f\u53d6\u308c\u308b\u306e\u306f\u3001\u75c7\u72b6\u304c\u4f3c\u3066\u3044\u3066\u3082\u78ba\u8a8d\u3059\u308b\u5834\u6240\u304c\u9055\u3046\u3068\u3044\u3046\u70b9\u3067\u3059\u3002<strong>\u6539\u3056\u3093\u306e\u5831\u544a\u4ef6\u6570\u3092\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u4ef6\u6570\u3068\u3057\u3066\u8aad\u307e\u306a\u3044\u3067\u304f\u3060\u3055\u3044<\/strong>\u3002<\/p>\n<div style=\"border:2px solid #eb6834;border-radius:8px;background:#fdf3ee;padding:14px 18px;margin:1.5em 0\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#c2521f\">\u6ce8\u610f<\/p>\n<p style=\"margin:0\">\u4efb\u610f\u5831\u544a\u306e\u4ef6\u6570\u3067\u3001\u56db\u534a\u671f\u3054\u3068\u306e\u632f\u308c\u3082\u5927\u304d\u304f\u3001\u5897\u52a0\u304c\u88ab\u5bb3\u306e\u5b9f\u6570\u5897\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002<\/p>\n<\/div>\n<h3>DNS\u304c\u539f\u56e0\u304b\u3092\u78ba\u304b\u3081\u308b\u306b\u306f\u3001\u8907\u6570\u306e\u30ea\u30be\u30eb\u30d0\u3067\u540d\u524d\u89e3\u6c7a\u306e\u7d50\u679c\u3092\u6bd4\u3079\u308b<\/h3>\n<p>DNS\u304c\u539f\u56e0\u304b\u3069\u3046\u304b\u306f\u3001\u8907\u6570\u306e\u30ea\u30be\u30eb\u30d0\u3067\u540c\u3058\u30c9\u30e1\u30a4\u30f3\u306e\u540d\u524d\u89e3\u6c7a\u7d50\u679c\u3092\u6bd4\u3079\u308b\u3068\u78ba\u304b\u3081\u3089\u308c\u307e\u3059\u3002<mark>Web\u30b5\u30fc\u30d0\u30fc\u3092\u8abf\u3079\u308b\u524d\u306b\u3001\u307e\u305aDNS\u306e\u5fdc\u7b54\u3092\u6bd4\u3079\u308b<\/mark>\u3068\u3001\u8abf\u3079\u308b\u5834\u6240\u3092\u7d5e\u308a\u8fbc\u3081\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u793e\u5185\u306e\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u3068\u5916\u90e8\u306e\u30ea\u30be\u30eb\u30d0\u3067\u540c\u3058\u30c9\u30e1\u30a4\u30f3\u3092\u540d\u524d\u89e3\u6c7a\u3057\u3001IP\u30a2\u30c9\u30ec\u30b9\u3092\u6bd4\u3079\u308b<\/li>\n<li>\u7d50\u679c\u304c\u9055\u3048\u3070DNS\u5074\u3092\u7591\u3044\u3001<strong>\u5fdc\u7b54\u306e\u5185\u5bb9\u3092\u8a18\u9332\u3057\u3066\u304b\u3089<\/strong>\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6d88\u53bb\u3057\u3066\u4e0a\u4f4d\u306e\u53c2\u7167\u5148\u306e\u8a2d\u5b9a\u3092\u78ba\u8a8d\u3059\u308b<\/li>\n<li>\u7d50\u679c\u304c\u540c\u3058\u306a\u3089Web\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u6539\u3056\u3093\u3092\u7591\u3044\u3001\u30b5\u30a4\u30c8\u7ba1\u7406\u8005\u3084\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u4e8b\u696d\u8005\u306b\u78ba\u8a8d\u3059\u308b<\/li>\n<\/ol>\n<p><strong>CDN\u3092\u4f7f\u3046\u30b5\u30a4\u30c8\u306a\u3069\u306f\u3001\u6b63\u5e38\u3067\u3082\u554f\u3044\u5408\u308f\u305b\u5143\u306b\u3088\u3063\u3066\u8fd4\u308bIP\u30a2\u30c9\u30ec\u30b9\u304c\u5909\u308f\u308a\u307e\u3059\u3002\u7d50\u679c\u304c\u9055\u3046\u3068\u304d\u306f\u3001\u305d\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u6b63\u898f\u306e\u4e8b\u696d\u8005\u306e\u3082\u306e\u304b\u3082\u3042\u308f\u305b\u3066\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044<\/strong>\u3002<strong>\u7aef\u672b\u5074\u306eDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u6d88\u53bb\u3082\u3042\u308f\u305b\u3066\u884c\u3044\u307e\u3057\u3087\u3046<\/strong>\u3002\u5224\u65ad\u306b\u8ff7\u3046\u5834\u5408\u306f\u3001JPCERT\/CC\u306b\u76f8\u8ac7\u30fb\u5831\u544a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<p style=\"font-size:13px;color:#777;margin:1em 0 0\">\u51fa\u5178: JPCERT\/CC\u300c\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5831\u544a\u5bfe\u5fdc\u30ec\u30dd\u30fc\u30c8\u300d\u5404\u53f7\uff082024\u5e741\u301c3\u6708\u301c2025\u5e741\u301c3\u6708\uff09\uff0fJPCERT\/CC\u300c\u56db\u534a\u671f\u30ec\u30dd\u30fc\u30c8\u300d\u5404\u53f7\uff082025\u5e744\u301c6\u6708\u301c2026\u5e744\u301c6\u6708\uff09\u3002\u5404\u53f7\u306eURL\u306f\u4e0a\u306e\u8868\u306e\u51fa\u5178\u3092\u53c2\u7167<\/p>\n<h2>\u307e\u3068\u3081: DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u5bfe\u7b56\u306f\u3001\u62c5\u5f53\u8005\u3092\u6c7a\u3081\u3066\u66f4\u65b0\u3068\u8a2d\u5b9a\u78ba\u8a8d\u3092\u7d9a\u3051\u308b\u3053\u3068\u304c\u57fa\u672c<\/h2>\n<p>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306f\u3001<strong>\u88ab\u5bb3\u4ef6\u6570\u3092\u5358\u72ec\u3067\u793a\u3059\u516c\u7684\u7d71\u8a08\u304c\u898b\u5f53\u305f\u3089\u305a<\/strong>\u3001\u4ef6\u6570\u3067\u5371\u967a\u5ea6\u3092\u6e2c\u308c\u306a\u3044\u653b\u6483\u3067\u3059\u3002\u6b21\u306e\u9806\u756a\u3067\u5bfe\u7b56\u3092\u9032\u3081\u307e\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li>DNS\u306e\u8a2d\u5b9a\u3092\u78ba\u8a8d\u3059\u308b\u62c5\u5f53\u8005\u3092\u6c7a\u3081\u308b<\/li>\n<li>\u81ea\u793e\u904b\u7528\u304b\u3001ISP\u30fb\u30af\u30e9\u30a6\u30c9\u4efb\u305b\u304b\u3092\u78ba\u8a8d\u3059\u308b<\/li>\n<li>\u81ea\u793e\u904b\u7528\u306a\u3089\u3001\u30b5\u30fc\u30d0\u30fc\u5074\u306e5\u9805\u76ee\u3092\u70b9\u691c\u3059\u308b<\/li>\n<li>\u5168\u793e\u3067\u3001\u591a\u8981\u7d20\u8a8d\u8a3c\u30fb\u8a3c\u660e\u66f8\u8b66\u544a\u306e\u30eb\u30fc\u30eb\u30fb\u540d\u524d\u89e3\u6c7a\u7d50\u679c\u306e\u78ba\u8a8d\u3092\u9032\u3081\u308b<\/li>\n<\/ul>\n<p>\u300c\u5404\u81ea\u306e\u5bfe\u5fdc\u300d\u306e69.7%\uff082024\u5e74\u5ea6\uff09\u3068\u3001\u624b\u53e3\u300c\u8106\u5f31\u6027\u300d\u306e48.0%\uff08<strong>2023\u5e74\u5ea6\u306e\u88ab\u5bb3\u30022024\u5e74\u5ea6\u8abf\u67fb<\/strong>\uff09\u306f\u3001IPA\u8abf\u67fb\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5168\u822c\u306e\u6570\u5024\u3067\u3059\u3002DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u6570\u5024\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u305d\u308c\u3067\u3082\u3001\u4e21\u8005\u304b\u3089\u8aad\u307f\u53d6\u308c\u308b\u65b9\u5411\u306f\u540c\u3058\u3067\u3059\u3002<mark>\u62c5\u5f53\u8005\u3092\u6c7a\u3081\u3066\u3001\u66f4\u65b0\u3068\u8a2d\u5b9a\u78ba\u8a8d\u3092\u7d9a\u3051\u308b\u3053\u3068\u304cDNS\u5bfe\u7b56\u306e\u57fa\u672c<\/mark>\u3067\u3059\u3002<\/p>\n<p style=\"font-size:13px;color:#777;margin:1em 0 0\">\u51fa\u5178: <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/security\/reports\/sme\/nl10bi000000fbvc-att\/sme-chousa-report2024r1.pdf\">IPA\u300c2024\u5e74\u5ea6 \u4e2d\u5c0f\u4f01\u696d\u306b\u304a\u3051\u308b\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306b\u95a2\u3059\u308b\u5b9f\u614b\u8abf\u67fb \u5831\u544a\u66f8\u300d<\/a><\/p>\n<h2>DNS\u8a2d\u5b9a\u306e\u78ba\u8a8d\u3092\u5c11\u4eba\u6570\u3067\u3082\u56de\u305b\u308b\u3088\u3046\u306b\u3059\u308b\u306a\u3089\u300c\u60c5\u30b7\u30b9\u30ab\u30ec\u30c3\u30b8\u300d<\/h2>\n<p style=\"text-align:center;margin:1.5em 0\"><a href=\"https:\/\/www.josys-college.com\/\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" src=\"https:\/\/venu-sys.co.jp\/jo-sys\/wp-content\/uploads\/sites\/2\/2026\/08\/cta-josys-college.jpg\" alt=\"\u60c5\u30b7\u30b9\u30ab\u30ec\u30c3\u30b8\" style=\"max-width:100%;height:auto\" \/><\/a><\/p>\n<p>DNS\u8a2d\u5b9a\u306e\u78ba\u8a8d\u306e\u3088\u3046\u306b\u3001\u62c5\u5f53\u8005\u304c\u77e5\u8b58\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u3068\u5f8c\u56de\u3057\u306b\u306a\u308a\u3084\u3059\u3044\u4f5c\u696d\u306f\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002\u5c11\u4eba\u6570\u306e\u60c5\u30b7\u30b9\u3067\u3082\u56de\u305b\u308b\u3088\u3046\u306b\u3059\u308b\u306b\u306f\u3001\u62c5\u5f53\u8005\u304c\u77ed\u3044\u6642\u9593\u3067\u57fa\u790e\u3092\u5b66\u3079\u308b\u4ed5\u7d44\u307f\u304c\u3042\u308b\u3068\u5b89\u5fc3\u3067\u3059\u3088\u306d\u3002<\/p>\n<p>\u300c\u60c5\u30b7\u30b9\u30ab\u30ec\u30c3\u30b8\u300d\u306f\u3001\u65b0\u4eba\u30fb\u3072\u3068\u308a\u60c5\u30b7\u30b9\u306e\u305f\u3081\u306e\u30de\u30a4\u30af\u30ed\u30e9\u30fc\u30cb\u30f3\u30b0LMS\u3067\u3059\u3002\u6570\u5206\u306e\u52d5\u753b\u3068\u5c0f\u30c6\u30b9\u30c8\u3067\u3001\u696d\u52d9\u306e\u5408\u9593\u306b\u5c11\u3057\u305a\u3064\u5b66\u3079\u307e\u3059\u3002<\/p>\n<div style=\"border:2px solid #2d4f8f;border-radius:8px;background:#f2f5fb;padding:14px 18px;margin:1.5em 0\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#2d4f8f\">\u60c5\u30b7\u30b9\u30ab\u30ec\u30c3\u30b8\u306e\u7279\u5fb4<\/p>\n<ul style=\"margin:0;padding-left:20px\">\n<li>\u6570\u5206\u306e\u52d5\u753b\u3068\u5c0f\u30c6\u30b9\u30c8\u3067\u9032\u3081\u308b\u30de\u30a4\u30af\u30ed\u30e9\u30fc\u30cb\u30f3\u30b0\u5f62\u5f0f<\/li>\n<li>\u5fc5\u4fee\u306e\u5272\u308a\u5f53\u3066\u30fb\u671f\u9650\u8a2d\u5b9a\u30fb\u9032\u6357\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u3067\u53d7\u8b1b\u72b6\u6cc1\u3092\u7ba1\u7406\u3067\u304d\u308b<\/li>\n<li>\u81ea\u793e\u30ab\u30ea\u30ad\u30e5\u30e9\u30e0\u306e\u7de8\u6210\u3068\u3001CSV\u3067\u306e\u6559\u80b2\u8a18\u9332\u306e\u51fa\u529b\u306b\u5bfe\u5fdc<\/li>\n<\/ul>\n<\/div>\n<p>\u5c0e\u5165\u306f5\u540d\u304b\u3089\u53ef\u80fd\u3067\u3001\u8acb\u6c42\u66f8\u6255\u3044\u306b\u3082\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002\u521d\u671f\u8a2d\u5b9a\u306f\u304a\u3088\u305d10\u5206\u3067\u5b8c\u4e86\u3057\u307e\u3059\u3002<\/p>\n<p style=\"text-align:center;margin:1.8em 0\"><a href=\"https:\/\/www.josys-college.com\/\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"display:inline-block;background:#2d4f8f;color:#fff;font-weight:700;padding:14px 36px;border-radius:6px;text-decoration:none\">\u60c5\u30b7\u30b9\u30ab\u30ec\u30c3\u30b8\u306e\u8a73\u7d30\u3092\u898b\u308b<\/a><\/p>\n<p>\u203b\u51fa\u5178<\/p>\n<ul>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/security\/reports\/sme\/nl10bi000000fbvc-att\/sme-chousa-report2024r1.pdf\">IPA\u300c2024\u5e74\u5ea6 \u4e2d\u5c0f\u4f01\u696d\u306b\u304a\u3051\u308b\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306b\u95a2\u3059\u308b\u5b9f\u614b\u8abf\u67fb \u5831\u544a\u66f8\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/security\/10threats\/omgdg50000008fi8-att\/kaisetsu_2026_soshiki.pdf\">IPA\u300c\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a310\u5927\u8105\u5a01 2026\u300d\u7d44\u7e54\u7de8 \u89e3\u8aac\u66f8<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/security\/10threats\/omgdg50000008fi8-att\/setsumei_2026_kojin.pdf\">IPA\u300c\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a310\u5927\u8105\u5a01 2026\u300d\u500b\u4eba\u5411\u3051\u8cc7\u6599\uff08PDF\uff09<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.ipa.go.jp\/archive\/security\/10threats\/10threats2009.html\">IPA\u300c10\u5927\u8105\u5a01 2009\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/pr\/2024\/IR_Report2023Q4.pdf\">JPCERT\/CC\u300c\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5831\u544a\u5bfe\u5fdc\u30ec\u30dd\u30fc\u30c8\uff3b2024\u5e741\u67081\u65e5\uff5e2024\u5e743\u670831\u65e5\uff3d\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/pr\/2024\/IR_Report2024Q1.pdf\">JPCERT\/CC\u300c\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5831\u544a\u5bfe\u5fdc\u30ec\u30dd\u30fc\u30c8\uff3b2024\u5e744\u67081\u65e5\uff5e2024\u5e746\u670830\u65e5\uff3d\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/pr\/2024\/IR_Report2024Q2.pdf\">JPCERT\/CC\u300c\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5831\u544a\u5bfe\u5fdc\u30ec\u30dd\u30fc\u30c8\uff3b2024\u5e747\u67081\u65e5\uff5e2024\u5e749\u670830\u65e5\uff3d\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/pr\/2025\/IR_Report2024Q3.pdf\">JPCERT\/CC\u300c\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5831\u544a\u5bfe\u5fdc\u30ec\u30dd\u30fc\u30c8\uff3b2024\u5e7410\u67081\u65e5\uff5e2024\u5e7412\u670831\u65e5\uff3d\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/pr\/2025\/IR_Report2024Q4.pdf\">JPCERT\/CC\u300c\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5831\u544a\u5bfe\u5fdc\u30ec\u30dd\u30fc\u30c8\uff3b2025\u5e741\u67081\u65e5\uff5e2025\u5e743\u670831\u65e5\uff3d\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/qr\/2025\/QR_FY2025-Q1.pdf\">JPCERT\/CC\u300c\u56db\u534a\u671f\u30ec\u30dd\u30fc\u30c8\uff3b2025\u5e744\u67081\u65e5\uff5e2025\u5e746\u670830\u65e5\uff3d\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/qr\/2025\/QR_FY2025-Q2.pdf\">JPCERT\/CC\u300c\u56db\u534a\u671f\u30ec\u30dd\u30fc\u30c8\uff3b2025\u5e747\u67081\u65e5\uff5e2025\u5e749\u670830\u65e5\uff3d\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/qr\/2026\/QR_FY2025-Q3.pdf\">JPCERT\/CC\u300c\u56db\u534a\u671f\u30ec\u30dd\u30fc\u30c8\uff3b2025\u5e7410\u67081\u65e5\uff5e2025\u5e7412\u670831\u65e5\uff3d\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/qr\/2026\/QR_FY2025-Q4.pdf\">JPCERT\/CC\u300c\u56db\u534a\u671f\u30ec\u30dd\u30fc\u30c8\uff3b2026\u5e741\u67081\u65e5\uff5e2026\u5e743\u670831\u65e5\uff3d\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/qr\/2026\/QR_FY2026-Q1.pdf\">JPCERT\/CC\u300c\u56db\u534a\u671f\u30ec\u30dd\u30fc\u30c8\uff3b2026\u5e744\u67081\u65e5\uff5e2026\u5e746\u670830\u65e5\uff3d\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/at\/2014\/at140016.html\">JPCERT\/CC\u300cDNS \u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u653b\u6483\u306b\u95a2\u3059\u308b\u6ce8\u610f\u559a\u8d77\u300d<\/a><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.jpcert.or.jp\/at\/2013\/at130022.html\">JPCERT\/CC\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><\/li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.soumu.go.jp\/main_sosiki\/joho_tsusin\/security_previous\/download\/juyogijutsu.pdf\">\u7dcf\u52d9\u7701\u300cDNS\u306e\u4ed5\u7d44\u307f\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u8105\u5a01\u30fbDNSSEC\u300d\u89e3\u8aac\u8cc7\u6599\uff08PDF\uff09<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u4ed5\u7d44\u307f\u3068\u3001\u60c5\u30b7\u30b9\u62c5\u5f53\u8005\u304c\u3068\u308b\u3079\u304d\u5bfe\u7b56\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002DNS\u30b5\u30fc\u30d0\u30fc\u306e\u66f4\u65b0\u3001\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3001DNSSEC\u691c\u8a3c\u3001\u518d\u5e30\u554f\u3044\u5408\u308f\u305b\u306e\u5236\u9650\u306a\u3069\u3001\u81ea\u793e\u904b\u7528\u304bISP\u4efb\u305b\u304b\u3067\u5909\u308f\u308b\u5bfe\u7b56\u7bc4\u56f2\u3092IPA\u306e\u8abf\u67fb\u30c7\u30fc\u30bf\u3068\u3042\u308f\u305b\u3066\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":11404,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[15],"tags":[],"class_list":["post-11402","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security"],"jetpack_featured_media_url":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-content\/uploads\/sites\/2\/2026\/11\/00-eyecatch-8.png","_links":{"self":[{"href":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-json\/wp\/v2\/posts\/11402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-json\/wp\/v2\/comments?post=11402"}],"version-history":[{"count":2,"href":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-json\/wp\/v2\/posts\/11402\/revisions"}],"predecessor-version":[{"id":11405,"href":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-json\/wp\/v2\/posts\/11402\/revisions\/11405"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-json\/wp\/v2\/media\/11404"}],"wp:attachment":[{"href":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-json\/wp\/v2\/media?parent=11402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-json\/wp\/v2\/categories?post=11402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/venu-sys.co.jp\/jo-sys\/wp-json\/wp\/v2\/tags?post=11402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}