{"id":37724,"date":"2022-10-06T19:01:34","date_gmt":"2022-10-06T10:01:34","guid":{"rendered":"https:\/\/kinsta.com\/jp\/?p=37724&#038;post_type=knowledgebase&#038;preview_id=37724"},"modified":"2025-10-02T04:48:26","modified_gmt":"2025-10-01T19:48:26","slug":"error-451","status":"publish","type":"post","link":"https:\/\/kinsta.com\/jp\/blog\/error-451\/","title":{"rendered":"HTTP 451\u30a8\u30e9\u30fc\uff08\u6cd5\u7684\u306a\u7406\u7531\u306b\u3088\u308a\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\uff09\u306e\u56de\u907f\u65b9\u6cd5"},"content":{"rendered":"<p>\u30b5\u30a4\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u6642\u306b\u3001HTTP 451\u30a8\u30e9\u30fc\u300cUnavailable Due to Legal Reasons\uff08\u6cd5\u7684\u306a\u7406\u7531\u306b\u3088\u308a\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\uff09\u300d\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u906d\u9047\u3057\u305f\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f<\/p>\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u306f\u3001\u4e00\u8a00\u3067\u8a00\u3046\u3068\u3001\u30b5\u30a4\u30c8\u6240\u6709\u8005\u304c\u3001\u307e\u305f\u306f\u8a2a\u554f\u8005\u306e\u6240\u5728\u5730\u3092\u7ba1\u8f44\u3059\u308b\u5f53\u5c40\u304c\u3001\u305d\u306e\u56fd\u3084\u5730\u57df\u306e\u6cd5\u5f8b\u3092\u9075\u5b88\u3059\u308b\u76ee\u7684\u3067\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/unblock-websites\/\">\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af<\/a>\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3059\u3082\u306e\u3002\u3057\u304b\u3057\u3001\u4ed6\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u554f\u984c\u306a\u304f\u30a2\u30af\u30bb\u30b9\u3067\u304d\u3066\u3044\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u30b5\u30a4\u30c8\u306b\u3069\u3046\u3057\u3066\u3082\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3044\u5834\u5408\u306b\u306f\u3001\u3053\u306e\u30a8\u30e9\u30fc\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001HTTP 451\u30a8\u30e9\u30fc\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u3054\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<div><\/div><kinsta-auto-toc heading=\"Table of Contents\" exclude=\"last\" list-style=\"arrow\" selector=\"h2\" count-number=\"-1\"><\/kinsta-auto-toc>\n<h2>HTTP 451\u30a8\u30e9\u30fc\uff08\u6cd5\u7684\u306a\u7406\u7531\u306b\u3088\u308a\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\uff09\u3068\u306f<\/h2>\n<figure id=\"attachment_121307\" aria-describedby=\"caption-attachment-121307\" style=\"width: 1024px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-121307 size-large\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2022\/04\/451_Unavailable_due_to_legal_reasons-1024x403.png\" alt=\"HTTP 451\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u8868\u793a\u4f8b\" width=\"1024\" height=\"403\"><figcaption id=\"caption-attachment-121307\" class=\"wp-caption-text\">HTTP 451\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u8868\u793a\u4f8b<\/figcaption><\/figure>\n<p>HTTP 451\u30a8\u30e9\u30fc\u300cUnavailable Due to Legal Reasons\u300d\u306f\u3001\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u308b\u30b5\u30a4\u30c8\u304c\u3001\u95b2\u89a7\u3057\u3066\u3044\u308b\u56fd\u306e\u653f\u5e9c\u5f53\u5c40\u306b\u3088\u3063\u3066\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u3001<strong>\u307e\u305f\u306f<\/strong>\u6cd5\u5f8b\u9075\u5b88\u306e\u305f\u3081\u306b<a href=\"https:\/\/kinsta.com\/jp\/blog\/dns-propagation\/\">\u30b5\u30a4\u30c8\u6240\u6709\u8005<\/a>\u306b\u3088\u3063\u3066\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306b\u8868\u793a\u3055\u308c\u308bHTTP\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<p>451\u30a8\u30e9\u30fc\u306f\u3001Ray Bradbury\u306eSF\u5c0f\u8aac\u300e\u83ef\u6c0f451\u5ea6\u300f\u306b\u7531\u6765\u3057\u3066\u3044\u308b\u3053\u3068\u304b\u3089\u3001\u691c\u95b2\u30a8\u30e9\u30fc\u3068\u547c\u3070\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3066\u3044\u308b\u7d44\u7e54\u540d\u306e\u8a73\u7d30\u3068\u305d\u306e\u7406\u7531\u3082\u4e00\u7dd2\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306f\u3001\u30b3\u30e1\u30c7\u30a3\u30fc\u30b0\u30eb\u30fc\u30d7\u300cMonty Python\u300d\u306b\u3088\u308b\u6620\u753b\u300e\u30e9\u30a4\u30d5\u30fb\u30aa\u30d6\u30fb\u30d6\u30e9\u30a4\u30a2\u30f3\u300f\uff08\u30a4\u30a8\u30b9\u30fb\u30ad\u30ea\u30b9\u30c8\u3068\u307b\u307c\u540c\u6642\u306b\u751f\u307e\u308c\u305f\u9752\u5e74\u30d6\u30e9\u30a4\u30a2\u30f3\u306e\u751f\u6daf\u3092\u63cf\u3044\u305f\u6620\u753b\uff09\u306b\u3061\u306a\u3093\u3060\u3001Mozilla\u3067\u306e\u30e6\u30fc\u30e2\u30a2\u306e\u3042\u308b\u8868\u793a\u4f8b\u3067\u3059\u3002<\/p>\n<p><code>HTTP\/1.1 451 Unavailable For Legal Reasons<br \/>\nLink: &lt;https:\/\/spqr.example.org\/legislatione&gt;; rel=\"blocked-by\"<br \/>\nContent-Type: text\/html<br \/>\n&lt;html&gt;<br \/>\n&lt;head&gt;&lt;title&gt;\u6cd5\u7684\u306a\u7406\u7531\u306b\u3088\u308a\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093&lt;\/title&gt;&lt;\/head&gt;<br \/>\n&lt;body&gt;<br \/>\n&lt;h1&gt;\u6cd5\u7684\u306a\u7406\u7531\u306b\u3088\u308a\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093&lt;\/h1&gt;<br \/>\n&lt;p&gt;\u3053\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u3001<br \/>\n\u30e6\u30c0\u30e4\u89e3\u653e\u6226\u7dda\u306e\u30b5\u30fc\u30d0\u30fc\u3067\u904b\u55b6\u3055\u308c\u3066\u3044\u308b<br \/>\n\u30ea\u30bd\u30fc\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u7981\u6b62\u3055\u308c\u3066\u3044\u308b\u30e6\u30ea\u30a2\u6cd5\u306b\u9075\u5b88\u3057\u3001<br \/>\n\u30e6\u30c0\u30e4\u5c5e\u5dde\u3067\u51e6\u7406\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\uff08\u203b\u3000\u6ce8\u91c8\uff1a<span data-sheets-value=\"{\"1\":2,\"2\":\"\uff08\u82f1\u8a9e\u539f\u6587\u306e\u65e5\u672c\u8a9e\u8a33\uff09\"}\" data-sheets-userformat=\"{\"2\":8961,\"3\":{\"1\":0},\"11\":4,\"12\":0,\"16\":10}\">\u82f1\u8a9e\u539f\u6587\u306e\u65e5\u672c\u8a9e\u8a33<\/span>\uff09&lt;\/p&gt;<br \/>\n&lt;\/body&gt;<br \/>\n&lt;\/html&gt;<\/code><\/p>\n\n<h2>HTTP 451\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3068\u306f<\/h2>\n<p><a href=\"https:\/\/kinsta.com\/jp\/blog\/http-status-codes\/\">\u4ed6\u306e\u591a\u304f\u306eHTTP\u30a8\u30e9\u30fc<\/a>\u3068\u306f\u7570\u306a\u308a\u3001451\u306e\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u300cUnavailable Due to Legal Reasons\u300d\u306f\u3001\u57fa\u672c\u7684\u306b<a href=\"https:\/\/kinsta.com\/jp\/pricing\/?plan=visits-business1\">\u30b5\u30a4\u30c8\u306e\u30b5\u30fc\u30d0\u30fc<\/a>\u3068\u30e6\u30fc\u30b6\u30fc\uff08\u30d6\u30e9\u30a6\u30b6\uff09\u306e\u3069\u3061\u3089\u306b\u3082\u8d77\u56e0\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-isp\/\">\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0<\/a>\uff08ISP\uff09\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30ec\u30d9\u30eb\u3067\u30b5\u30a4\u30c8\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u30b5\u30a4\u30c8\u306b\u3082\u30d6\u30e9\u30a6\u30b6\u306b\u3082\u554f\u984c\u306e\u306a\u3044\u72b6\u614b\u3067\u3053\u306e\u30a8\u30e9\u30fc\u304c\u8868\u793a\u3055\u308c\u308b\u5834\u5408\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u306b\u5229\u7528\u3057\u3066\u3044\u308bISP\u306b\u539f\u56e0\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<aside role=\"note\" class=\"wp-block-kinsta-notice is-style-info\">\n            <h3>Info<\/h3>\n        <p>ISP\u304c\u30b5\u30a4\u30c8\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u969b\u3001\u5fc5\u305a\u3057\u3082\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u308b\u3068\u306f\u9650\u3089\u305a\u3001\u56fd\u306b\u3088\u3063\u3066\u306f\u3001\u4f55\u3082\u8868\u793a\u3055\u308c\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/aside>\n\n<p>\u5225\u306e\u539f\u56e0\u3068\u3057\u3066\u3001\u6cd5\u5f8b\u306b\u6e96\u62e0\u3059\u308b\u305f\u3081\u3001\u3082\u3057\u304f\u306f\u6cd5\u7684\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u3001\u30b5\u30a4\u30c8\u5074\u304b\u3089\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/wordpress-gdpr-compliance\/\">GDPR<\/a>\u9075\u5b88\u306e\u5fc5\u8981\u6027\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u30e8\u30fc\u30ed\u30c3\u30d1\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u30b5\u30a4\u30c8\u3082\u5c11\u6570\u3067\u3059\u304c\u5b58\u5728\u3057\u307e\u3059\uff08\u4e0a\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u304c\u305d\u306e\u4f8b\uff09\u3002<\/p>\n<p>\u3044\u305a\u308c\u306b\u305b\u3088\u3001\u3053\u306e\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u306f\u3001\u30b5\u30a4\u30c8\u3084\u30e6\u30fc\u30b6\u30fc\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf<strong>\u3067\u306f\u306a\u304f<\/strong>\u3001\u6cd5\u5f8b\u3084\u6cd5\u7684\u547d\u4ee4\u306e\u9075\u5b88\u306b\u95a2\u4fc2\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u3092\u7406\u89e3\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>HTTP 451\u30a8\u30e9\u30fc\u306e\u56de\u907f\u65b9\u6cd5<\/h2>\n<p>451\u30a8\u30e9\u30fc\u300cUnavailable Due to Legal Reasons\u300d\u306f\u3001\u30b5\u30a4\u30c8\u304c\u6cd5\u7684\u306a\u7406\u7531\u3067\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u305f\u3081\u3001\u81ea\u5206\u306e\u30b5\u30a4\u30c8\u306e\u5834\u5408\u306f\u5f01\u8b77\u58eb\u3092\u96c7\u3063\u3066\u88c1\u5224\u3092\u8d77\u3053\u3055\u306a\u3044\u9650\u308a\u3001\u300c\u89e3\u6c7a\u300d\u3059\u308b\u65b9\u6cd5\u306f\u57fa\u672c\u7684\u306b\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001\u81ea\u5206\u304c\u8ab0\u304b\u4ed6\u306e\u4eba\u306e\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u308b\u5834\u5408\u306b\u306f\u3001\u3053\u306e\u30a8\u30e9\u30fc\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>1. VPN\uff08\u4eee\u60f3\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff09\u3092\u5229\u7528\u3059\u308b<\/h3>\n<p>VPN\uff08\u4eee\u60f3\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff09\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u63a5\u7d9a\u304c\u6697\u53f7\u5316\u3055\u308c\u3001\u5225\u306e\u56fd\u306e\u30b5\u30fc\u30d0\u30fc\u3092\u7d4c\u7531\u3057\u3066\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u9055\u3046\u56fd\u304b\u3089\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308c\u3070\u3001ISP\u306b\u3088\u308b\u6b63\u78ba\u306a\u8ffd\u8de1\u304c\u3067\u304d\u306a\u304f\u306a\u308a\u3001\u3053\u306e\u30a8\u30e9\u30fc\uff08\u3064\u307e\u308a\u898f\u5236\u5f53\u5c40\u306b\u3088\u308b\u30d6\u30ed\u30c3\u30af\uff09\u3092\u56de\u907f\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u306a\u3044\u56fd\u306eVPN\u30b5\u30fc\u30d0\u30fc\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4f8b\u3048\u3070\u3001\u73fe\u5728\u30d5\u30e9\u30f3\u30b9\u306b\u4f4f\u3093\u3067\u3044\u3066\u3001GDPR\u3092\u7406\u7531\u306b\u30e8\u30fc\u30ed\u30c3\u30d1\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3066\u3044\u308b\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3044\u5834\u5408\u3001\u30c9\u30a4\u30c4\u306eVPN\u30b5\u30fc\u30d0\u30fc\u3092\u9078\u3093\u3067\u3082\u540c\u3058\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002\u7c73\u56fd\u306eVPN\u30b5\u30fc\u30d0\u30fc\u3092\u9078\u3079\u3070\u89e3\u6c7a\u3059\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n<p><a href=\"https:\/\/kinsta.com\/blog\/how-does-a-vpn-work\/\">VPN\u306e\u8a73\u3057\u3044\u4ed5\u7d44\u307f\u306b\u95a2\u3057\u3066\u306f\u3053\u3061\u3089<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u4e88\u7b97\u306b\u9650\u308a\u304c\u3042\u308b\u5834\u5408\u306f\u3001ProtonVPN\u306a\u3069\u306e\u30b5\u30fc\u30d3\u30b9\u3092\u7121\u6599\u3067\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u8c4a\u5bcc\u306a\u30b5\u30fc\u30d0\u30fc\u306e\u9078\u629e\u80a2\u3068\u6a5f\u80fd\u3092\u6c42\u3081\u308b\u306e\u3067\u3042\u308c\u3070\u3001NordVPN\u3084ExpressVPN\u306a\u3069\u306e\u6709\u6599\u306e\u30b5\u30fc\u30d3\u30b9\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<h3>2. DNS\u30ea\u30be\u30eb\u30d0\u3092Cloudflare\u306b\u5909\u66f4\u3059\u308b<\/h3>\n<p>\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3001\u30a6\u30a7\u30d6\u30d6\u30e9\u30a6\u30b6\u304c\u30b5\u30a4\u30c8\u306b\u63a5\u7d9a\u3059\u308b\u969b\u306b\u306f\u3001DNS\u30ea\u30be\u30eb\u30d0\u306b\u3088\u3063\u3066<a href=\"https:\/\/kinsta.com\/blog\/choose-domain-name\/\">\u30b5\u30a4\u30c8\u306e\u30c9\u30e1\u30a4\u30f3\u540d<\/a>\u3092\u5143\u306b<a href=\"https:\/\/kinsta.com\/jp\/blog\/dedicated-ip-address\/\">\u5b9f\u969b\u306e\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9<\/a>\u306b\u3064\u3044\u3066\u60c5\u5831\u78ba\u8a8d\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306b\u95a2\u9023\u3057\u3066\u3001\u30b5\u30a4\u30c8\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3066\u3044\u308bISP\u304c\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/dns-propagation\/\">\u4f7f\u7528\u3057\u3066\u3044\u308b\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u306eDNS\u30ea\u30be\u30eb\u30d0<\/a>\u3092\u7d4c\u7531\u3057\u3066\u3044\u308b\u306e\u304c\u539f\u56e0\u3067\u3001\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f\u3001\u5225\u306eDNS\u30ea\u30be\u30eb\u30d0\u3092\u4f7f\u7528\u3057\u307e\u3057\u3087\u3046\u3002\u5b8c\u5168\u7121\u6599\u3067\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u304c\u914d\u616e\u3055\u308c\u305f<a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/what-is-1.1.1.1\/\" target=\"_blank\" rel=\"noopener noreferrer\">Cloudflare 1.1.1.1<\/a>\u304c\u304a\u52e7\u3081\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u306f\u3001<a href=\"https:\/\/developers.google.com\/speed\/public-dns\" target=\"_blank\" rel=\"noopener noreferrer\">Google\u304c\u63d0\u4f9b\u3059\u308b<\/a>\u7121\u6599\u306eDNS\u30ea\u30be\u30eb\u30d0\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4e3b\u8981OS\u3068\u30c7\u30d0\u30a4\u30b9\u306eDNS\u30ea\u30be\u30eb\u30d0\u3092\u5909\u66f4\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u3001Cloudflare\u304c\u7d39\u4ecb\u3057\u3066\u3044\u308b<a href=\"https:\/\/1.1.1.1\/dns\/\">\u3053\u3061\u3089\u306e\u624b\u9806<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002\u300cSetup on&#8230;\u300d\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u5404OS\u3001\u30c7\u30d0\u30a4\u30b9\u306e\u5909\u66f4\u624b\u9806\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_121306\" aria-describedby=\"caption-attachment-121306\" style=\"width: 1024px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-121306 size-large\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2022\/04\/change-dns-provider-1024x973.jpg\" alt=\"Cloudflare\u306b\u3088\u308b\u5404\u7a2eOS\u3001\u30c7\u30d0\u30a4\u30b9\u3054\u3068\u306e\u8a73\u7d30\u306a\u624b\u9806\" width=\"1024\" height=\"973\"><figcaption id=\"caption-attachment-121306\" class=\"wp-caption-text\">Cloudflare\u306b\u3088\u308b\u5404\u7a2eOS\u3001\u30c7\u30d0\u30a4\u30b9\u3054\u3068\u306e\u8a73\u3057\u3044\u624b\u9806<\/figcaption><\/figure>\n<h3>3. HTTPS\u3092\u6709\u52b9\u5316\u3059\u308b<\/h3>\n<p>HTTP\u7248\u3067\u306f\u306a\u304f<a href=\"https:\/\/kinsta.com\/jp\/blog\/http-to-https\/\">HTTPS\u7248<\/a>\u306e\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u3067\u3001\u30a8\u30e9\u30fc\u3092\u56de\u907f\u3067\u304d\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>HTTPS\u3067\u306a\u3044\u30b5\u30a4\u30c8\u306e\u5834\u5408\u3001<a href=\"https:\/\/kinsta.com\/jp\/browser-market-share\/\">\u30a6\u30a7\u30d6\u30d6\u30e9\u30a6\u30b6<\/a>\u3068\u30b5\u30a4\u30c8\u9593\u3067\u8ee2\u9001\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306f\u3001\u6697\u53f7\u5316\u3055\u308c\u3066\u304a\u3089\u305a\u3001ISP\u3092\u542b\u3081\u8ab0\u3067\u3082\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/kinsta.com\/jp\/blog\/redirect-http-to-https\/\">HTTPS<\/a>\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u8ee2\u9001\u4e2d\u306e\u30c7\u30fc\u30bf\u304c\u3059\u3079\u3066\u6697\u53f7\u5316\u3055\u308c\u308b\u305f\u3081\u3001ISP\u3084\u7b2c\u4e09\u8005\u304c\u30c7\u30fc\u30bf\u3092\u76d7\u307f\u898b\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\uff08\u305f\u3060\u3057\u3001ISP\u306f\u63a5\u7d9a\u5148\u306e\u30b5\u30a4\u30c8\u3092\u8abf\u3079\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u3053\u306e\u89e3\u6c7a\u65b9\u6cd5\u3067\u306f\u4e0d\u5341\u5206\u306a\u3053\u3068\u304c\u591a\u304f\u3001VPN\u3092\u5229\u7528\u3059\u308b\u306e\u304c\u8ce2\u660e\u3067\u3059\uff09\u3002<\/p>\n<p>\u3053\u306e\u56de\u907f\u7b56\u304c\u6709\u52b9\u304b\u3069\u3046\u304b\u3092\u78ba\u304b\u3081\u308b\u305f\u3081\u306b\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u540d\u306e<strong>http<\/strong>\u3092<strong>https<\/strong>\u306b\u5909\u66f4\u3057\u3066\u518d\u5ea6\u30a2\u30af\u30bb\u30b9\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u304c\u3046\u307e\u304f\u3044\u3051\u3070\u3001<a href=\"https:\/\/www.eff.org\/https-everywhere\" target=\"_blank\" rel=\"noopener noreferrer\">HTTPS Everywhere<\/a>\u306e\u3088\u3046\u306a\u62e1\u5f35\u6a5f\u80fd\u3092\u4f7f\u7528\u3057\u3066\u3001HTTPS\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u306e\u81ea\u52d5\u5316\u3092\u8a2d\u5b9a\u3057\u3066\u304a\u304f\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n<h3>4. \u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3092\u5229\u7528\u3059\u308b<\/h3>\n<p>\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30d6\u30e9\u30a6\u30b6\u306e\u63a5\u7d9a\u3092\u5225\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u8ee2\u9001\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u30a8\u30e9\u30fc\u3092\u56de\u907f\u3067\u304d\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u65b9\u6cd5\u306fVPN\u3092\u5229\u7528\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u3068\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001<a href=\"https:\/\/kinsta.com\/blog\/proxy-vs-vpn\/\">\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3068VPN\u306b\u306f\u91cd\u8981\u306a\u9055\u3044<\/a>\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e00\u822c\u7684\u306b\u3001\u9ad8\u6027\u80fd\u306eVPN\u30b5\u30fc\u30d3\u30b9\u306e\u65b9\u304c\u5b89\u5168\u6027\u304c\u9ad8\u304f\u3001\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u306b\u914d\u616e\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u3067\u304d\u308b\u9650\u308a\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3067\u306f\u306a\u304fVPN\u3092\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002VPN\u3092\u5229\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u4f55\u304b\u3057\u3089\u306e\u7406\u7531\u3067VPN\u3092\u5229\u7528\u3067\u304d\u306a\u3044\u5834\u5408\u306f\u3001<a href=\"https:\/\/kinsta.com\/jp\/docs\/wordpress-hosting\/wordpress-cdn\/proxy-cdn-compatibility-checklist\/\">\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc<\/a>\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u901a\u5e38\u306f\u7121\u6599\u3067\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>5. Tor\u30d6\u30e9\u30a6\u30b6\u3092\u4f7f\u7528\u3059\u308b<\/h3>\n<p>\u653f\u5e9c\u5f53\u5c40\u304b\u3089\u306e\u30d6\u30ed\u30c3\u30af\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306e\uff08\u4e8b\u5b9f\u4e0a\uff09\u78ba\u5b9f\u306a\u65b9\u6cd5\u3068\u3057\u3066\u3001<a href=\"https:\/\/www.torproject.org\/download\/\">Tor\u30d6\u30e9\u30a6\u30b6<\/a>\u3092\u4ecb\u3057\u3066Tor\u3092\u4f7f\u7528\u3059\u308b\u624b\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/kinsta.com\/jp\/blog\/most-secure-browser\/#6-tor\">Tor\uff08\u30c8\u30fc\u30a2\uff09<\/a>\u306f\u3001\u7c73\u56fd\u6d77\u8ecd\u7814\u7a76\u6240\u306b\u3088\u3063\u3066\u3001\u7279\u306b\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u306e\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306b\u958b\u767a\u3055\u308c\u305f\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u3059\u3002<\/p>\n<p>\u63a5\u7d9a\u304cTor\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30ea\u30ec\u30fc\u30b5\u30fc\u30d0\u30fc\u306e\u7121\u4f5c\u70ba\u306a\u7d4c\u8def\u3092\u7d4c\u7531\u3057\u3066\u30d0\u30a6\u30f3\u30b9\u3059\u308b\u4ed5\u7d44\u307f\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u304c\u6697\u53f7\u5316\u3055\u308c\u3001\u63a5\u7d9a\u306e\u767a\u4fe1\u5143\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u304c\u306a\u3044\u305f\u3081\u3001Tor\u3092\u4f7f\u7528\u3059\u308c\u3070\u3001451\u30a8\u30e9\u30fc\uff08\u304a\u3088\u3073\u307b\u307c\u5168\u3066\u306e\u30cd\u30c3\u30c8\u4e0a\u3067\u306e\u691c\u95b2\uff09\u3092\u907f\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3064\u307e\u308b\u3068\u3053\u308d\u3001Tor\u30d6\u30e9\u30a6\u30b6\u306f<a href=\"https:\/\/kinsta.com\/jp\/blog\/most-secure-browser\/\">\u6700\u3082\u5b89\u5168\u306a\u30a6\u30a7\u30d6\u30d6\u30e9\u30a6\u30b6<\/a>\u306e1\u3064\u3068\u8a00\u3048\u307e\u3059\u3002<\/p>\n\n<h2>\u307e\u3068\u3081<\/h2>\n<p>HTTP 451\u30a8\u30e9\u30fc\u300cUnavailable Due to Legal Reasons\u300d\u306f\u3001\u30b5\u30a4\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u3001\u653f\u5e9c\u306a\u3069\u306b\u3088\u308a\u6cd5\u7684\u306a\u7406\u7531\u3067\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u30b5\u30a4\u30c8\u5074\u306b\u554f\u984c\u304c\u306a\u304f\u3066\u3082\u3001\u30a2\u30af\u30bb\u30b9\u5143\u3068\u306a\u308b\u56fd\u306e\u5f53\u5c40\u304c\u6cd5\u7684\u547d\u4ee4\u3092\u51fa\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\uff08ISP\uff09\u304c\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3001\u7d50\u679c\u7684\u306b451\u30a8\u30e9\u30fc\u304c\u8868\u793a\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3042\u308b\u3044\u306f\u3001ISP\u3067\u306f\u306a\u304f\u3001\u30b5\u30a4\u30c8\u6240\u6709\u8005\u304c\u73fe\u5730\u306e\u6cd5\u5f8b\u306b\u6e96\u62e0\u3059\u308b\u305f\u3081\u306b\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u3092\u51fa\u3057\u3066\u3044\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u4e00\u4f8b\u3068\u3057\u3066\u3001GDPR\u306e\u9075\u5b88\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u30e8\u30fc\u30ed\u30c3\u30d1\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3066\u3044\u308b\u30b5\u30a4\u30c8\u306a\u3069\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>451\u306e\u30a8\u30e9\u30fc\u3092\u56de\u907f\u3059\u308b\u306b\u306f\u3001VPN\u3001\u30d7\u30ed\u30ad\u30b7\u3001Tor\u30d6\u30e9\u30a6\u30b6\u306a\u3069\u3092\u4f7f\u7528\u3057\u3066\u3001\u81ea\u5206\u306e\u901a\u4fe1\u7d4c\u8def\u3092\u96a0\u3059\u306e\u304c\u5f97\u7b56\u3067\u3059\u3002\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u3001DNS\u30b5\u30fc\u30d3\u30b9\u3092<a href=\"https:\/\/kinsta.com\/jp\/blog\/cloudflare-integration\/\">Cloudflare<\/a>\u306b\u5909\u66f4\u3057\u305f\u308a\u3001\u30b5\u30a4\u30c8\u306eHTTPS\u7248\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u56de\u907f\u3067\u304d\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30b5\u30a4\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u6642\u306b\u3001HTTP 451\u30a8\u30e9\u30fc\u300cUn &#8230;<\/p>\n","protected":false},"author":117,"featured_media":37725,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[516,596,139],"topic":[773],"class_list":["post-37724","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-browser-errors","tag-isp","tag-wperrors","topic-http-status-codes"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>HTTP 451\u30a8\u30e9\u30fc\uff08\u6cd5\u7684\u306a\u7406\u7531\u306b\u3088\u308a\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\uff09\u306e\u56de\u907f\u65b9\u6cd5<\/title>\n<meta name=\"description\" content=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001451\u30a8\u30e9\u30fc\uff08\u6cd5\u7684\u306a\u7406\u7531\u306b\u3088\u308a\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\uff09\u3092\u56de\u907f\u3057\u3066\u3001\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kinsta.com\/jp\/blog\/error-451\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HTTP 451\u30a8\u30e9\u30fc\uff08\u6cd5\u7684\u306a\u7406\u7531\u306b\u3088\u308a\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\uff09\u306e\u56de\u907f\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001451\u30a8\u30e9\u30fc\uff08\u6cd5\u7684\u306a\u7406\u7531\u306b\u3088\u308a\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\uff09\u3092\u56de\u907f\u3057\u3066\u3001\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kinsta.com\/jp\/blog\/error-451\/\" \/>\n<meta property=\"og:site_name\" content=\"Kinsta\u00ae\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Kinsta-Japan-334616080691171\/\" \/>\n<meta property=\"article:published_time\" content=\"2022-10-06T10:01:34+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-01T19:48:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2022\/10\/451-unavailable-due-to-legal-reasons.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1460\" \/>\n\t<meta property=\"og:image:height\" content=\"730\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Salman Ravoof\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:description\" 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