{"id":12497,"date":"2022-12-16T14:15:48","date_gmt":"2022-12-16T05:15:48","guid":{"rendered":"https:\/\/www.secuavail.com\/kb\/?p=12497"},"modified":"2022-12-20T13:47:39","modified_gmt":"2022-12-20T04:47:39","slug":"how-to_dns-cache-poisoning","status":"publish","type":"post","link":"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/","title":{"rendered":"DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3084\u3063\u3066\u307f\u305f"},"content":{"rendered":"<p>\u4ee4\u548c4\u5e74\u79cb\u5b63\u60c5\u5831\u51e6\u7406\u5b89\u5168\u78ba\u4fdd\u652f\u63f4\u58eb\u8a66\u9a13\u306b\u3066DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306b\u3064\u3044\u3066\u306e\u554f\u984c\u304c\u51fa\u984c\u3055\u308c\u307e\u3057\u305f\u3002\u5b9f\u969b\u306b\u3084\u3063\u305f\u3053\u3068\u304c\u306a\u304b\u3063\u305f\u306e\u3067\u3001\u3069\u3046\u3084\u3063\u305f\u3089\u3067\u304d\u308b\u304b\u624b\u3092\u52d5\u304b\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#%E5%88%A9%E7%94%A8%E3%81%97%E3%81%9F%E3%82%82%E3%81%AE\" >\u5229\u7528\u3057\u305f\u3082\u306e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#%E3%81%8D%E3%81%A3%E3%81%8B%E3%81%91\" >\u304d\u3063\u304b\u3051<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#%E7%B5%90%E8%AB%96%EF%BC%9A%E3%81%A7%E3%81%8D%E3%81%9F%E3%80%82\" >\u7d50\u8ad6\uff1a\u3067\u304d\u305f\u3002<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#%E5%AD%A6%E3%82%93%E3%81%A0%E3%81%93%E3%81%A8\" >\u5b66\u3093\u3060\u3053\u3068<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#DNS%E3%82%AD%E3%83%A3%E3%83%83%E3%82%B7%E3%83%A5%E3%83%9D%E3%82%A4%E3%82%BA%E3%83%8B%E3%83%B3%E3%82%B0%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6\" >DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306b\u3064\u3044\u3066<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#%E6%A7%8B%E6%88%90\" >\u69cb\u6210<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#%E6%A4%9C%E8%A8%BC%E3%81%AE%E6%B5%81%E3%82%8C\" >\u691c\u8a3c\u306e\u6d41\u308c<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#1%E3%82%BD%E3%83%BC%E3%82%B9%E3%83%9D%E3%83%BC%E3%83%88%E3%83%A9%E3%83%B3%E3%83%80%E3%83%9E%E3%82%A4%E3%82%BC%E3%83%BC%E3%82%B7%E3%83%A7%E3%83%B3%E3%81%AE%E7%84%A1%E5%8A%B9%E5%8C%96\" >1.\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u306e\u7121\u52b9\u5316<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#2%E5%81%BD%E8%A3%85%E3%83%87%E3%83%BC%E3%82%BF%E3%82%B0%E3%83%A9%E3%83%A0%E4%BD%9C%E6%88%90\" >2.\u507d\u88c5\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u4f5c\u6210<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#3%E3%81%AA%E3%82%93%E3%81%A9%E3%82%84%E3%81%A3%E3%81%A6%E3%82%82%E3%81%86%E3%81%BE%E3%81%8F%E3%81%84%E3%81%8B%E3%81%AA%E3%81%84\" >3.\u306a\u3093\u3069\u3084\u3063\u3066\u3082\u3046\u307e\u304f\u3044\u304b\u306a\u3044<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#4IP%E3%82%B9%E3%83%97%E3%83%BC%E3%83%95%E3%82%A3%E3%83%B3%E3%82%B0\" >4.IP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#5%E6%94%B9%E3%82%81%E3%81%A6DNS%E3%82%AD%E3%83%A3%E3%83%83%E3%82%B7%E3%83%A5%E3%83%9D%E3%82%A4%E3%82%BA%E3%83%8B%E3%83%B3%E3%82%B0%E3%82%92%E8%A9%A6%E3%81%99\" >5.\u6539\u3081\u3066DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3092\u8a66\u3059<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#%E6%82%AA%E7%94%A8%E5%8F%AF%E8%83%BD%E3%81%8B\" >\u60aa\u7528\u53ef\u80fd\u304b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#%E3%81%BE%E3%81%A8%E3%82%81\" >\u307e\u3068\u3081<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.secuavail.com\/kb\/practical-post\/how-to_dns-cache-poisoning\/#%E5%BE%8C%E6%97%A5%E8%AB%87\" >\u5f8c\u65e5\u8ac7<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%E5%88%A9%E7%94%A8%E3%81%97%E3%81%9F%E3%82%82%E3%81%AE\"><\/span>\u5229\u7528\u3057\u305f\u3082\u306e<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u30fbAlmaLinux<br \/>\n\u30fbBIND 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.10 (Extended Support Version)<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E3%81%8D%E3%81%A3%E3%81%8B%E3%81%91\"><\/span>\u304d\u3063\u304b\u3051<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u4ee4\u548c4\u5e74\u306e\u79cb\u5b63\u60c5\u5831\u51e6\u7406\u5b89\u5168\u78ba\u4fdd\u652f\u63f4\u58eb\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c\u306bDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306b\u95a2\u3059\u308b\u51fa\u984c\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>\u3044\u308d\u3093\u306a\u3068\u3053\u308d\u3067DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u8aac\u660e\u306e\u8a18\u4e8b\u3082\u898b\u307e\u3059\u304c\u3001\u81ea\u5206\u3067\u3084\u3063\u3066\u3044\u308b\u8a18\u4e8b\u306f\u3042\u307e\u308a\u898b\u304b\u3051\u307e\u305b\u3093\u3002<\/p>\n<p>\u300cDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3063\u3066\u5f15\u304d\u8d77\u3053\u305b\u308b\u3093\u3060\u308d\u3046\u304b\u3002\u300d\u305d\u3046\u601d\u3063\u305f\u3053\u3068\u304c\u304d\u3063\u304b\u3051\u3067\u3057\u305f\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E7%B5%90%E8%AB%96%EF%BC%9A%E3%81%A7%E3%81%8D%E3%81%9F%E3%80%82\"><\/span>\u7d50\u8ad6\uff1a\u3067\u304d\u305f\u3002<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%AD%A6%E3%82%93%E3%81%A0%E3%81%93%E3%81%A8\"><\/span>\u5b66\u3093\u3060\u3053\u3068<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u6700\u521d\u306b\u3084\u3063\u3066\u307f\u3066\u9593\u9055\u3063\u3066\u8a8d\u8b58\u3092\u3057\u3066\u3044\u305f\u3053\u3068\u3068\u3001\u7406\u89e3\u304c\u6df1\u307e\u3063\u305f\u3053\u3068\u3092\u8a18\u8f09\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u8a8d\u8b58\u3092\u9593\u9055\u3048\u3066\u3044\u305f\u3053\u3068<\/strong><\/p>\n<p>\u30fbDNS\uff08bind\uff09\u3092\u3060\u307e\u3059\u306b\u306f\u3001query ID\u3060\u3051\u3092\u8a50\u79f0\u3059\u308c\u3070\u3044\u3044\u308f\u3051\u3067\u306f\u306a\u3044\u3002<\/p>\n<p><strong>\u7406\u89e3\u3057\u305f\u3053\u3068<\/strong><\/p>\n<p>\u30fb\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u304b\u3089IP\u30d1\u30b1\u30c3\u30c8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u5247\u3063\u3066\u3001\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u53d6\u308b\u65b9\u6cd5<br \/>\n\u30fb\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u3068DNS\u30d1\u30b1\u30c3\u30c8\uff08\u30c7\u30fc\u30bf\uff09\u306e\u751f\u6210\u65b9\u6cd5<br \/>\n\u30fbIP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u3092\u304a\u624b\u8efd\u306b\u3084\u308b\u65b9\u6cd5\uff08\u3053\u3053\u3067\u306f\u624b\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u305b\u3093\u3002\uff09<\/p>\n<p>\u4e0a\u8a18\u3092\u8aad\u3093\u3067\u8208\u5473\u3092\u3072\u304b\u308c\u307e\u3057\u305f\u3089\u3001\u8aad\u3093\u3067\u3044\u305f\u3060\u3051\u308c\u3070\u5e78\u3044\u3067\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNS%E3%82%AD%E3%83%A3%E3%83%83%E3%82%B7%E3%83%A5%E3%83%9D%E3%82%A4%E3%82%BA%E3%83%8B%E3%83%B3%E3%82%B0%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6\"><\/span>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306b\u3064\u3044\u3066<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/www.cerias.purdue.edu\/assets\/pdf\/bibtex_archive\/94-05.pdf\">Addressing Weaknesses in the Domain Name System Protocol<\/a>(Christoph L. Schuba)<\/p>\n<p>\u4e0a\u8a18\u8ad6\u6587\u304c\u6700\u521d\u306bDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u5371\u967a\u6027\u3092\u63d0\u5531\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\n\u203b\u6642\u4ee3\u80cc\u666f\u3084\u8a00\u8a9e\u304c\u3053\u3068\u306a\u308b\u305f\u3081\u3001\u79c1\u306f\u3042\u307e\u308a\u53c2\u7167\u3057\u3066\u3044\u307e\u305b\u3093\u3002<br \/>\nDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306b\u3064\u3044\u3066\u7406\u89e3\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u6b21\u306b\u9032\u3080\u524d\u306b\u4ee5\u4e0b\u3092\u53c2\u7167\u3057\u3066\u304a\u304f\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/www.nic.ad.jp\/ja\/newsletter\/No40\/0800.html\">\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c810\u5206\u8b1b\u5ea7\uff1aDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0<\/a><\/p>\n<p>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3092\u5f15\u304d\u8d77\u3053\u3059\u305f\u3081\u306b\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u5bfe\u8c61\u3068\u3059\u308b\u30c9\u30e1\u30a4\u30f3\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u5b58\u5728\u3057\u306a\u3044\u3053\u3068<\/li>\n<li>\u901a\u4fe1\u3092\u884c\u3046\u4e00\u7d44\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u3068\u6a29\u5a01\u30b5\u30fc\u30d0\u306b\u304a\u3044\u3066\u3001\u305d\u308c\u305e\u308c\u306e\u30b5\u30fc\u30d0\u30d7\u30ed\u30bb\u30b9\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u3068IP\u30a2\u30c9\u30ec\u30b9\u304c\u4e00\u8cab\u3057\u3066\u3044\u308b\u3053\u3068\u203b1<\/li>\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u3068\u6a29\u5a01\u30b5\u30fc\u30d0\u9593\u306e\u540d\u524d\u89e3\u6c7a\u306b\u5fc5\u8981\u306a\u901a\u4fe1\u306b\u304a\u3044\u3066\u3001DNS\u30d8\u30c3\u30c0\u30fc\u30bb\u30af\u30b7\u30e7\u30f3\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5185\u306eID\uff08\u4ee5\u4e0b\u30af\u30a8\u30eaID\u3068\u8a18\u8f09\uff09\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u3053\u3068<\/li>\n<li>\u4e0a\u8a18\u6761\u4ef6\u306b\u4e00\u81f4\u3057\u305f\u3046\u3048\u3067\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3092\u884c\u3046\u7aef\u672b\u304b\u3089\u6a29\u5a01\u30b5\u30fc\u30d0\u3088\u308a\u3082\u65e9\u304f\u507d\u88c5\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u306b\u9001\u308a\u3001\u653b\u6483\u3092\u6210\u529f\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/li>\n<\/ol>\n<p>\u691c\u8a3c\u3057\u3066\u3044\u308b\u4e2d\u3067\u7d30\u304b\u306a\u90e8\u5206\u306f\u3042\u308c\u3069\u3001\u91cd\u8981\u306a\u306e\u306f\u4e0a\u8a184\u9805\u76ee\u3067\u3059\u3002<br \/>\n\u300c4.\u300d\u304c\u672c\u691c\u8a3c\u306e\u4e00\u756a\u306e\u554f\u984c\u70b9\u3060\u3063\u305f\u3068\u8a8d\u8b58\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\n\u306a\u304a\u3001\u4eca\u56de\u306fDNSSEC\u306e\u8a2d\u5b9a\u306f\u884c\u308f\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u524d\u63d0\u3068\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u203b1<br \/>\nRFC768\u306b\u8a18\u8f09\u306e\u901a\u308a\u3001\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u3067\u306f\u9001\u4fe1\u5143\u30dd\u30fc\u30c8\u756a\u53f7\u306f\u300c\u30aa\u30d7\u30b7\u30e7\u30f3\u300d\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u306e\u6271\u3044\u306b\u304a\u3044\u3066\u3001\u53cc\u65b9\u5411\u3067\u901a\u4fe1\u3092\u884c\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u306f\u5fc5\u9808\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>RFC 1034- (\u30c9\u30e1\u30a4\u30f3\u540d\uff1a\u6982\u5ff5\u3068\u6a5f\u80fd)\u3001RFC 1035 \u2013 (\u30c9\u30e1\u30a4\u30f3\u540d\uff1a\u5b9f\u88c5\u3068\u4ed5\u69d8)\u306b\u304a\u3044\u3066\u3082\u660e\u8a18\u306f\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002BIND\u3084OS\u5074\u3067\u306e\u5b9f\u88c5\u306b\u4f9d\u5b58\u3059\u308b\u4ed5\u69d8\u304b\u3068\u601d\u308f\u308c\u307e\u3059\u3002<br \/>\n\u7591\u4f3c\u7684\u306b\u5b9b\u5148\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3088\u3046\u306a\u6a5f\u69cb\u304c\u3069\u3053\u304b\u3067\u52d5\u3044\u3066\u3044\u308b\u306e\u3067\u3057\u3087\u3046\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E6%A7%8B%E6%88%90\"><\/span>\u69cb\u6210<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/cbf5b9f60da99bf791c0aa12a770f429.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-12499\" src=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/cbf5b9f60da99bf791c0aa12a770f429.png\" alt=\"\" width=\"568\" height=\"471\" srcset=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/cbf5b9f60da99bf791c0aa12a770f429.png 568w, https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/cbf5b9f60da99bf791c0aa12a770f429-300x249.png 300w\" sizes=\"auto, (max-width: 568px) 100vw, 568px\" \/><\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E6%A4%9C%E8%A8%BC%E3%81%AE%E6%B5%81%E3%82%8C\"><\/span>\u691c\u8a3c\u306e\u6d41\u308c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1%E3%82%BD%E3%83%BC%E3%82%B9%E3%83%9D%E3%83%BC%E3%83%88%E3%83%A9%E3%83%B3%E3%83%80%E3%83%9E%E3%82%A4%E3%82%BC%E3%83%BC%E3%82%B7%E3%83%A7%E3%83%B3%E3%81%AE%E7%84%A1%E5%8A%B9%E5%8C%96\"><\/span>1.\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u306e\u7121\u52b9\u5316<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u300c\u901a\u4fe1\u3092\u884c\u3046\u4e00\u7d44\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u3068\u6a29\u5a01\u30b5\u30fc\u30d0\u306b\u304a\u3044\u3066\u3001\u305d\u308c\u305e\u308c\u306e\u30b5\u30fc\u30d0\u30d7\u30ed\u30bb\u30b9\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u3068IP\u30a2\u30c9\u30ec\u30b9\u304c\u4e00\u8cab\u3057\u3066\u3044\u308b\u3053\u3068\u300d\u306b\u304a\u3044\u3066\u3001\u9001\u4fe1\u5143\u30b5\u30fc\u30d0\u30d7\u30ed\u30bb\u30b9\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u3092\u56fa\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u300c\u4e0a\u8a18\u6761\u4ef6\u306b\u4e00\u81f4\u3057\u305f\u3046\u3048\u3067\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3092\u884c\u3046\u7aef\u672b\u304b\u3089\u6a29\u5a01\u30b5\u30fc\u30d0\u3088\u308a\u3082\u65e9\u304f\u507d\u88c5\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u306b\u9001\u308a\u3001\u653b\u6483\u3092\u6210\u529f\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u300d\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3057\u3084\u3059\u304f\u3059\u308b\u305f\u3081\u306b\u884c\u3044\u307e\u3059\u3002<\/p>\n<p>\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3063\u305f\u5834\u5408\u3001\u6a29\u5a01\u30b5\u30fc\u30d0\u304b\u3089\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u3078\u306e\u5fdc\u7b54\u306b\u306f\u300c\u30af\u30a8\u30eaID\u306e\u4e00\u81f4\uff0b\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u306e\u518d\u5e30\u554f\u3044\u5408\u308f\u305b\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u7528\u3044\u3089\u308c\u308b\u30dd\u30fc\u30c8\u756a\u53f7\u306e\u4e00\u81f4\u300d\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e00\u65b9\u3001\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u308f\u306a\u3044\u3068\u300c\u30af\u30a8\u30eaID\u306e\u4e00\u81f4\u300d\uff08\u53b3\u5bc6\u306b\u306fIP\u30a2\u30c9\u30ec\u30b9\u3067\u306e\u4e00\u81f4\u3082\u5fc5\u8981\uff09\u306e\u307f\u3067DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u304c\u884c\u3048\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u8a73\u7d30\u306a\u5185\u5bb9\u306b\u3064\u3044\u3066\u306f<a href=\"https:\/\/atmarkit.itmedia.co.jp\/ait\/articles\/1501\/05\/news015.html\">\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f\uff08ITmedia\uff09<\/a>\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u8a2d\u5b9a\u524d\u306e\u72b6\u614b\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u304b\u3089\u6a29\u5a01\u30b5\u30fc\u30d0\u3078\u306e\u518d\u5e30\u554f\u3044\u5408\u308f\u305b\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<p>\u8a2d\u5b9a\u524d<\/p>\n<p><a href=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/5e4896966c9944fcf00890f4502605bf.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-12501\" src=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/5e4896966c9944fcf00890f4502605bf.png\" alt=\"\" width=\"566\" height=\"73\" srcset=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/5e4896966c9944fcf00890f4502605bf.png 566w, https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/5e4896966c9944fcf00890f4502605bf-300x39.png 300w\" sizes=\"auto, (max-width: 566px) 100vw, 566px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/1efad1b5aa917a846fa5b3fc11367269.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-12502\" src=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/1efad1b5aa917a846fa5b3fc11367269.png\" alt=\"\" width=\"566\" height=\"72\" srcset=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/1efad1b5aa917a846fa5b3fc11367269.png 566w, https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/1efad1b5aa917a846fa5b3fc11367269-300x38.png 300w\" sizes=\"auto, (max-width: 566px) 100vw, 566px\" \/><\/a><\/p>\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0(172.23.61.61.)\u306e\u9001\u4fe1\u5143\u30dd\u30fc\u30c8\u756a\u53f7\u304c\u3001\u4e0a\u306e\u753b\u50cf\u306f15744\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n2\u56de\u76ee\u306f23808\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u4e0a\u8a18\u3088\u308a\u3001\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u6a5f\u80fd\u304c\u6709\u52b9\u5316\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u30bd\u30fc\u30b9\u30dd\u30fc\u30c8\u30e9\u30f3\u30c0\u30de\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\u306fBIND9\u306e\u30de\u30cb\u30e5\u30a2\u30eb\u306b\u8a18\u8f09\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/bind9.readthedocs.io\/en\/v9_18_9\/reference.html#query-address\" target=\"_blank\" rel=\"noopener\">https:\/\/bind9.readthedocs.io\/en\/v9_18_9\/reference.html#query-address<\/a><\/p>\n<p>\u4ee5\u4e0b\u306e\u8a2d\u5b9a\u3092\/etc\/named.conf(\u6a19\u6e96\u30d1\u30b9)\u306b\u4ed8\u3051\u52a0\u3048\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">query-source port 53;\r\nquery-source-v6 port 53;<\/pre>\n<p>\u3053\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u3001\u518d\u8aad\u307f\u8fbc\u307f\u3059\u308b\u3053\u3068\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u304b\u3089\u5916\u90e8\u3078\u306e\u518d\u5e30\u554f\u3044\u5408\u308f\u305b\u6642\u306e\u9001\u4fe1\u5143\u30dd\u30fc\u30c8\u756a\u53f7\u304c53\u306b\u56fa\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/7d6fddc4d5f4457e598413974089fe73.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-12503\" src=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/7d6fddc4d5f4457e598413974089fe73.png\" alt=\"\" width=\"566\" height=\"68\" srcset=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/7d6fddc4d5f4457e598413974089fe73.png 566w, https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/7d6fddc4d5f4457e598413974089fe73-300x36.png 300w\" sizes=\"auto, (max-width: 566px) 100vw, 566px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/7adfed136bf50c6b1f5c23f5919c3a0a.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-12504\" src=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/7adfed136bf50c6b1f5c23f5919c3a0a.png\" alt=\"\" width=\"566\" height=\"69\" srcset=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/7adfed136bf50c6b1f5c23f5919c3a0a.png 566w, https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/7adfed136bf50c6b1f5c23f5919c3a0a-300x37.png 300w\" sizes=\"auto, (max-width: 566px) 100vw, 566px\" \/><\/a><\/p>\n<p>\u4e0a\u8a18\u306e\u901a\u308a\u3001\u4f55\u5ea6\u3082\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3082\u9001\u4fe1\u5143\u30dd\u30fc\u30c8\u756a\u53f7\u304c\u5909\u308f\u3063\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2%E5%81%BD%E8%A3%85%E3%83%87%E3%83%BC%E3%82%BF%E3%82%B0%E3%83%A9%E3%83%A0%E4%BD%9C%E6%88%90\"><\/span>2.\u507d\u88c5\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u4f5c\u6210<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u672c\u691c\u8a3c\u3092\u59cb\u3081\u308b\u3068\u304d\u306b\u5c71\u5834\u3068\u611f\u3058\u3066\u3044\u307e\u3057\u305f\u3002<br \/>\n\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u3092\u3069\u3046\u4f5c\u308c\u3070\u3044\u3044\u306e\u304b\u6b63\u76f4\u308f\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<p>\u3068\u308a\u3042\u3048\u305a\u3001\u8a00\u8a9e\u9078\u5b9a\u3092\u3057\u307e\u3057\u305f\u3002\u5927\u91cf\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u9001\u308b\u3053\u3068\u306b\u306a\u308b\u305f\u3081\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u8a00\u8a9e\u306e\u307b\u3046\u304c\u9069\u5207\u304b\u3068\u601d\u3044\u3001C\u304bJava\u306b\u3057\u3088\u3046\u3068\u601d\u3044\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u304c\u697d\u3067\u3044\u3064\u3082\u4f7f\u3044\u6163\u308c\u3066\u3044\u308b\u3068\u3044\u3046\u7406\u7531\u3067Node.js\u3092\u4f7f\u3046\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u3060\u308c\u304b\u304cDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3092\u3059\u308b\u305f\u3081\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092npm\u306b\u516c\u958b\u3057\u3066\u304f\u308c\u3066\u3044\u308b\u306e\u3067\u306f\u3001\u3068\u671f\u5f85\u3057\u307e\u3057\u305f\u304c\u3001\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002<br \/>\n\u3057\u3087\u3046\u304c\u306a\u3044\u306e\u3067\u3001\u81ea\u5206\u3067\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u8aad\u307f\u306a\u304c\u3089\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u308b\u3053\u3068\u306b\u3002<\/p>\n<p><a href=\"https:\/\/nodejs.org\/api\/dgram.html\">Node.js documentation(UDP\/datagram sockets)<\/a><\/p>\n<p>socket.send\u306emsg\u306b\u304a\u3044\u3066\u5229\u7528\u53ef\u80fd\u306a\u578b\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u3084\u8272\u3005\u306a\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u8abf\u3079\u305f\u7d50\u679c\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u4e0a\u306fString\u578b\u306eHex\u30c7\u30fc\u30bf\u3092\u5f15\u6570\u306b\u4e0e\u3048\u308c\u3070\u5b9f\u73fe\u304c\u3067\u304d\u305d\u3046\u3060\u3068\u308f\u304b\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>\u3069\u3046\u3084\u3063\u3066\u30d1\u30b1\u30c3\u30c8\u3092\u751f\u6210\u3059\u308c\u3070\u3044\u3044\u306e\u304b\u308f\u304b\u3089\u306a\u304b\u3063\u305f\u305f\u3081\u3001\u30c7\u30fc\u30bf\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u8abf\u3079\u307e\u3057\u305f\u3002<\/p>\n<p><a href=\"https:\/\/atmarkit.itmedia.co.jp\/ait\/articles\/1601\/29\/news014.html\">DNS\u30d1\u30b1\u30c3\u30c8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3068\u3001DNS\u30d1\u30b1\u30c3\u30c8\u306e\u4f5c\u308a\u65b9<\/a><\/p>\n<p>\u4e0a\u8a18\u8a18\u4e8b\u3092\u8aad\u307f\u307e\u3057\u305f\u304c\u30011\u304b\u3089\u81ea\u5206\u3067\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u3092\u4f5c\u308b\u306e\u306f\u975e\u52b9\u7387\u7684\u306a\u306e\u3067\u3001\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u3057\u305f\u5024\u3092\u305d\u306e\u307e\u307e\u4f7f\u3063\u3066\u307f\u308b\u3053\u3068\u306b\u3002<\/p>\n<p>0x0000:\u00a0 4500 005a 9cd8 0000 3211 3586 d29d fa42<br \/>\n0x0010:\u00a0 ac17 3d3d 0035 0035 0046 8d18 963d 8400<br \/>\n0x0020:\u00a0 0001 0001 0000 0001 0377 7777 0973 6563<br \/>\n0x0030:\u00a0 7561 7661 696c 0363 6f6d 0000 0100 01c0<br \/>\n0x0040:\u00a0 0c00 0100 0100 0001 2c00 0412 b4a7 6a00<br \/>\n0x0050:\u00a0 0029 1000 0000 8000 0000<\/p>\n<p>\u5192\u982d\u306e4500\u304b\u3089\u672b\u5c3e\u306e0000\u307e\u3067\u3092dgram.createSocket(\u2018udp4\u2019).send\u306emsg\u306b\u542b\u3081\u3066\u3001\u901a\u4fe1\u3092\u9001\u3063\u305f\u3068\u3053\u308d\u3001\u540c\u3058\u30d0\u30a4\u30ca\u30ea\u304c\u7e70\u308a\u8fd4\u3055\u308c\u308b\u90e8\u5206\u304c\u3042\u308b\u4e8b\u306b\u6c17\u3065\u304d\u307e\u3057\u305f\u3002<br \/>\n\u3042\u304f\u307e\u3067dgram.CreateSocket(\u2018udp\u2019)\u306f\u3001\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u306b\u3088\u308b\u901a\u4fe1\u3092\u884c\u3046\u305f\u3081\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u3067\u3059\u3002<\/p>\n<p>dgram.CreateSocket(\u2018udp\u2019)\u3067\u901a\u4fe1\u3092\u9001\u308b\u3068\u3001IP\u30d1\u30b1\u30c3\u30c8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u304c\u30e2\u30b8\u30e5\u30fc\u30eb\u5074\u3067\u88dc\u5b8c\u3055\u308c\u308b\u3088\u3046\u3067\u3057\u305f\u3002\u3064\u307e\u308a\u3001\u4e0a\u8a18\u306e\u65b9\u6cd5\u3067\u79c1\u304c\u9001\u3063\u305f\u901a\u4fe1\u306f\u3001[IP\u30d1\u30b1\u30c3\u30c8\uff08L3\u60c5\u5831\uff09]\uff0b[IP\u30d1\u30b1\u30c3\u30c8\u307f\u305f\u3044\u306a\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\uff0b\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0](L4\u4ee5\u4e0a\u306e\u60c5\u5831)]\u3068\u306a\u3063\u3066\u3044\u305f\u308f\u3051\u3067\u3057\u305f\u3002<br \/>\n\u305d\u306e\u305f\u3081\u3001IP\u30d1\u30b1\u30c3\u30c8\u3068\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u306e\u5883\u76ee\u3092\u898b\u6975\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>\u30d1\u30b1\u30c3\u30c8\u306e\u4e2d\u8eab\u306f\u672c\u67651\u30680\u306e\u307f\u3067\u4fe1\u53f7\u3092\u4f5c\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u3057\u305f\u7d50\u679c\u306f\u300116\u9032\u6570\u3067\u8868\u73fe\u3055\u308c\u3066\u3044\u307e\u3059\u30022\u9032\u6570\u306b\u304a\u3044\u306615\u306f1111\u3067\u3042\u308b\u305f\u3081\u300116\u9032\u65701\u6587\u5b57\u306e\u8868\u8a18=4\u30d3\u30c3\u30c8\u3068\u8a08\u7b97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>IP\u30d1\u30b1\u30c3\u30c8\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u53c2\u7167\u3057\u306a\u304c\u3089\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u7d50\u679c\u3092\u6bd4\u8f03\u3059\u308c\u3070\u5f8c\u306f\u3067\u304d\u305d\u3046\u3067\u3059\u3002<\/p>\n<p>\u300c0x0000:\u00a0 4500 005a 9cd8 0000 3211 3586 <span style=\"color: #ff0000;\">d29d fa42<\/span>\u300d<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u8a08\u7b97\u3059\u308b\u3053\u3068\u3067\u4e0a\u8a18\u8d64\u6587\u5b57\u306e\u90e8\u5206\u304c\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u306e\u90e8\u5206\u306a\u3069\u3068\u3044\u3046\u3088\u3046\u306b\u8aad\u307f\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u30d6\u30e9\u30a6\u30b6\u306e\u958b\u767a\u8005\u30c4\u30fc\u30eb\u304b\u3089JavaScript\u3092\u4f7f\u3046\u3053\u3068\u3067\u300116\u9032\u6570\u309210\u9032\u6570\u306b\u5909\u63db\u3067\u304d\u307e\u3059\u3002<br \/>\nparseInt('d2',16)\u3000=&gt;\u3000210<br \/>\nparseInt('9d',16)\u3000=&gt;\u3000157<br \/>\nparseInt('fa',16)\u3000=&gt;\u3000250<br \/>\nparseInt('42',16)\u3000=&gt;\u300066<\/p>\n<p>\u3042\u3089\u304b\u3058\u3081\u5b9a\u3081\u3089\u308c\u3066\u3044\u308b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u5f93\u3063\u3066\u3001\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u7d50\u679c\u3092\u89e3\u6790\u3057\u305f\u7d50\u679c\u3001\u30af\u30a8\u30eaID\u3084\u3001\u30c9\u30e1\u30a4\u30f3\u306e\u540d\u524d\u89e3\u6c7a\u7d50\u679c\u3068\u3057\u3066\u5fdc\u7b54\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9\u306e\u5834\u6240\u3092\u7279\u5b9a\u3067\u304d\u307e\u3057\u305f\u3002<br \/>\n\u30af\u30a8\u30eaID\u30921~65535\u307e\u306716\u9032\u6570\u304b\u3064\u9069\u5207\u306b\u30d1\u30c7\u30a3\u30f3\u30b0\u3057\u305f\u3046\u3048\u3067\u3001\u8a50\u79f0\u5bfe\u8c61\u3068\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9\u3092\u7d44\u307f\u8fbc\u3080\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u81ea\u793e\u306eWeb\u30b5\u30fc\u30d0\u7528\u306eFQDN(www.secuavail.com[18.180.167.106]))\u306e\u540d\u524d\u89e3\u6c7a\u6642\u306b\u3001www.example.com[93.184.216.34]\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u5fdc\u7b54\u3059\u308b\u3088\u3046\u306b\u507d\u88c5\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3%E3%81%AA%E3%82%93%E3%81%A9%E3%82%84%E3%81%A3%E3%81%A6%E3%82%82%E3%81%86%E3%81%BE%E3%81%8F%E3%81%84%E3%81%8B%E3%81%AA%E3%81%84\"><\/span>3.\u306a\u3093\u3069\u3084\u3063\u3066\u3082\u3046\u307e\u304f\u3044\u304b\u306a\u3044<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u507d\u88c5\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u306e\u6e96\u5099\u304c\u3067\u304d\u3001\u3053\u308c\u3067\u3046\u307e\u304f\u3044\u304f\u3060\u308d\u3046\u3068\u601d\u3063\u3066\u4f55\u5341\u56de\u304b\u8a66\u3057\u3066\u307f\u307e\u3057\u305f\u304c\u3001DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306f\u6210\u529f\u3057\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<p>\u3053\u308c\u306b\u306f2\u3064\u306e\u8981\u56e0\u304c\u3042\u308a\u307e\u3057\u305f\u3002<br \/>\n\u307e\u305a1\u3064\u76ee\u306f\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u3066\u3044\u306a\u3044FQDN\u306b\u5bfe\u3059\u308b\u540d\u524d\u89e3\u6c7a\u306e\u30b9\u30d4\u30fc\u30c9\u304c\u60f3\u50cf\u4ee5\u4e0a\u306b\u65e9\u304b\u3063\u305f\u3053\u3068\u3067\u3059\u3002DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u304c\u96e3\u3057\u3044\u8981\u56e0\u306e\u4e00\u3064\u3067\u3059\u3002<br \/>\n\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u306e\u9001\u53d7\u4fe1\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306b\u4e0a\u9650\u3092\u8a2d\u3051\u308b\u3001stress\u30b3\u30de\u30f3\u30c9\u306a\u3069\u3067\u8ca0\u8377\u3092\u4e0a\u3052\u308b\u3053\u3068\u306a\u3069\u3092\u8003\u3048\u307e\u3057\u305f\u304c\u3001\u3044\u305a\u308c\u3082\u671f\u5f85\u3067\u304d\u308b\u7d50\u679c\u306b\u76f4\u7d50\u3057\u306a\u3044\u6c17\u304c\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u3053\u308c\u306b\u3064\u3044\u3066\u306f\u3001\u89e3\u6c7a\u3059\u308b\u3053\u3068\u304c\u96e3\u3057\u3044\u3082\u306e\u3068\u601d\u308f\u308c\u305f\u305f\u3081\u3001\u88cf\u6280\u3092\u4f7f\u3046\u3053\u3068\u306b\u3002<br \/>\nFW\u3067www.secuavail.com\u306eNS\u3078\u306e\u518d\u5e30\u554f\u3044\u5408\u308f\u305b\u3092\u884c\u3048\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u30af\u30a8\u30ea\u306e\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u6642\u9593\u3092\u5f15\u304d\u5ef6\u3070\u3057\u3066\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u304c\u6210\u529f\u3057\u3084\u3059\u3044\u3088\u3046\u306b\u8abf\u6574\u3092\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>2\u3064\u3081\u306e\u8981\u56e0\u306f\u3001\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3067\u3057\u305f\u3002<br \/>\n\u300c\u901a\u4fe1\u3092\u884c\u3046\u4e00\u7d44\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u3068\u6a29\u5a01\u30b5\u30fc\u30d0\u306b\u304a\u3044\u3066\u3001\u305d\u308c\u305e\u308c\u306e\u30b5\u30fc\u30d0\u30d7\u30ed\u30bb\u30b9\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u3068IP\u30a2\u30c9\u30ec\u30b9\u304c\u4e00\u8cab\u3057\u3066\u3044\u308b\u3053\u3068\u300d\u306e\u3001\u300cIP\u30a2\u30c9\u30ec\u30b9\u304c\u4e00\u8cab\u3057\u3066\u3044\u308b\u3053\u3068\u300d\u3068\u3044\u3046\u3053\u3068\u304c\u5fc5\u9808\u3067\u3042\u308b\u3068\u306f\u5f53\u6642\u601d\u3063\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002<br \/>\n\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u5074\u3067\u5fdc\u7b54\u304c\u8fd4\u3063\u3066\u304d\u305f\u5834\u5408\u306b\u306f\u3001\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3001\u5b9b\u5148\u30dd\u30fc\u30c8\u756a\u53f7\u3001\u9001\u4fe1\u5143\u30dd\u30fc\u30c8\u756a\u53f7\u3001\u30af\u30a8\u30eaID\u3092\u30c1\u30a7\u30c3\u30af\u3057\u305f\u3046\u3048\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3066\u3044\u308b\u306e\u3060\u308d\u3046\u3068\u63a8\u6e2c\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u306e\u8a50\u79f0\uff08IP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\uff09\u304c\u6700\u5f8c\u306e\u30ab\u30ae\u3068\u306a\u3063\u305f\u306e\u3067\u3057\u305f\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4IP%E3%82%B9%E3%83%97%E3%83%BC%E3%83%95%E3%82%A3%E3%83%B3%E3%82%B0\"><\/span>4.IP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>IP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u306fIP\u30a2\u30c9\u30ec\u30b9\u306e\u8a50\u79f0\u3067\u3059\u3002<\/p>\n<p>TCP\u3067\u306e\u901a\u4fe1\u3067\u306f3\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3092\u884c\u3063\u305f\u3046\u3048\u3067\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u901a\u4fe1\u3092\u884c\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001UDP\u3067\u306e\u901a\u4fe1\u306f3\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306a\u3069\u3092\u884c\u308f\u306a\u3044\u305f\u3081\u3001IP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u306e\u5f71\u97ff\u304c\u3088\u308a\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>DoS\u653b\u6483\u306a\u3069\u3067\u653b\u6483\u5143\u3092\u96a0\u3059\u305f\u3081\u306b\u5229\u7528\u3059\u308b\u30b1\u30fc\u30b9\u304c\u3042\u308b\u306a\u3069\u3001\u3053\u306e\u624b\u6cd5\u304c\u3042\u308b\u524d\u63d0\u3067\u6210\u308a\u7acb\u3063\u3066\u3044\u308b\u653b\u6483\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002<br 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class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u3053\u308c\u307e\u3067\u306e\u3053\u3068\u3092\u8e0f\u307e\u3048\u305f\u3046\u3048\u3067\u3001\u6539\u3081\u3066DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3092\u8a66\u3057\u307e\u3057\u305f\u3002<br \/>\n\u4f55\u5ea6\u3082\u8a66\u3059\u3068\u4ee5\u4e0b\u306e\u7d50\u679c\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u6210\u529f\u6642\u306edig\u7d50\u679c\u753b\u9762<\/p>\n<p><a href=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/b12c8b7e401505670006e9aa6ee0e2d0.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-12505\" src=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/b12c8b7e401505670006e9aa6ee0e2d0.png\" alt=\"\" width=\"566\" height=\"450\" srcset=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/b12c8b7e401505670006e9aa6ee0e2d0.png 566w, https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/b12c8b7e401505670006e9aa6ee0e2d0-300x239.png 300w\" sizes=\"auto, (max-width: 566px) 100vw, 566px\" \/><\/a><\/p>\n<p>\u6b63\u5e38\u306adig\u7d50\u679c\u753b\u9762<\/p>\n<p><a href=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/695e432aa0b80e914efae12cd0be2a70.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-12506\" src=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/695e432aa0b80e914efae12cd0be2a70.png\" alt=\"\" width=\"566\" height=\"419\" srcset=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/695e432aa0b80e914efae12cd0be2a70.png 566w, https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/695e432aa0b80e914efae12cd0be2a70-300x222.png 300w\" sizes=\"auto, (max-width: 566px) 100vw, 566px\" \/><\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E6%82%AA%E7%94%A8%E5%8F%AF%E8%83%BD%E3%81%8B\"><\/span>\u60aa\u7528\u53ef\u80fd\u304b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u8a66\u3057\u306b\u3001\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3055\u308c\u305fwww.secuavail.com\uff08www.example.com\u306eIP\u30a2\u30c9\u30ec\u30b9\u306b\u66f8\u304d\u63db\u3048\u3089\u308c\u3066\u3044\u308b\uff09\u306bHTTPS\u3067\u30a2\u30af\u30bb\u30b9\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n<p>\u3059\u308b\u3068\u8a3c\u660e\u66f8\u30a8\u30e9\u30fc\u306b\u3088\u3063\u3066\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002<\/p>\n<p><a href=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/184e1fbbe38c6fb97ef918a7cd7090a8.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-12507\" src=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/184e1fbbe38c6fb97ef918a7cd7090a8.png\" alt=\"\" width=\"567\" height=\"25\" srcset=\"https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/184e1fbbe38c6fb97ef918a7cd7090a8.png 567w, https:\/\/www.secuavail.com\/kb\/wp-content\/uploads\/2022\/12\/184e1fbbe38c6fb97ef918a7cd7090a8-300x13.png 300w\" sizes=\"auto, (max-width: 567px) 100vw, 567px\" \/><\/a><\/p>\n<p>\u8a3c\u660e\u66f8\u3092\u4f7f\u3046\u7406\u7531\u306e\u4e00\u3064\u3068\u3057\u3066\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u30a2\u30af\u30bb\u30b9\u5148\u306e\u30b5\u30fc\u30d0\u306e\u8a8d\u8a3c\u3092\u884c\u3046\u3068\u3044\u3046\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002\u4eca\u56de\u306f\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u5148\u304cwww.secuavai.com\u3067\u3042\u308b\u304c\u3001\u30b5\u30fc\u30d0\u8a3c\u660e\u66f8\u306eCommonName(SAN)\u3068\u4e00\u81f4\u3057\u306a\u3044\u305f\u3081\u3001\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u304c\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u4e2d\u65ad\u3055\u305b\u307e\u3057\u305f\u3002<br 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\/>\n<a href=\"https:\/\/jprs.jp\/tech\/security\/2014-04-30-poisoning-countermeasure-resolver-1.pdf\" target=\"_blank\" rel=\"noopener\">https:\/\/jprs.jp\/tech\/security\/2014-04-30-poisoning-countermeasure-resolver-1.pdf<\/a><\/p>\n<p>IP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u3092\u9632\u3050\u6a5f\u69cb\u3082\u4f3a\u3046\u3053\u3068\u304c\u3067\u304d\u3001\u4eca\u56de\u306e\u691c\u8a3c\u3092\u901a\u3058\u3066\u5c11\u3057\u7406\u89e3\u304c\u6df1\u307e\u3063\u305f\u3088\u3046\u306a\u6c17\u304c\u3057\u307e\u3059\u3002<br \/>\n\u500b\u4eba\u7684\u306b\u306fIP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u3084\u507d\u88c5\u30c7\u30fc\u30bf\u3092\u4f5c\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u305f\u3081\u3001\u304b\u306a\u308a\u767a\u898b\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u4ee4\u548c4\u5e74\u79cb\u5b63\u60c5\u5831\u51e6\u7406\u5b89\u5168\u78ba\u4fdd\u652f\u63f4\u58eb\u8a66\u9a13\u306b\u3066DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306b\u3064\u3044\u3066\u306e\u554f\u984c\u304c\u51fa\u984c\u3055\u308c\u307e\u3057\u305f\u3002\u5b9f\u969b\u306b\u3084\u3063\u305f\u3053\u3068\u304c\u306a\u304b\u3063\u305f\u306e\u3067\u3001\u3069\u3046\u3084\u3063\u305f\u3089\u3067\u304d\u308b\u304b\u624b\u3092\u52d5\u304b\u3057\u3066\u307f\u307e\u3057\u305f\u3002 \u5229\u7528\u3057\u305f\u3082\u306e \u30fbAlmaLinux \u30fbBI [&hellip;]","protected":false},"author":9,"featured_media":12513,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[52],"tags":[],"class_list":["post-12497","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-practical-post"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.secuavail.com\/kb\/wp-json\/wp\/v2\/posts\/12497","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.secuavail.com\/kb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.secuavail.com\/kb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.secuavail.com\/kb\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.secuavail.com\/kb\/wp-json\/wp\/v2\/comments?post=12497"}],"version-history":[{"count":10,"href":"https:\/\/www.secuavail.com\/kb\/wp-json\/wp\/v2\/posts\/12497\/revisions"}],"predecessor-version":[{"id":12539,"href":"https:\/\/www.secuavail.com\/kb\/wp-json\/wp\/v2\/posts\/12497\/revisions\/12539"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.secuavail.com\/kb\/wp-json\/wp\/v2\/media\/12513"}],"wp:attachment":[{"href":"https:\/\/www.secuavail.com\/kb\/wp-json\/wp\/v2\/media?parent=12497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.secuavail.com\/kb\/wp-json\/wp\/v2\/categories?post=12497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.secuavail.com\/kb\/wp-json\/wp\/v2\/tags?post=12497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}