{"id":58974,"date":"2024-08-05T22:35:35","date_gmt":"2024-08-05T13:35:35","guid":{"rendered":"https:\/\/kinsta.com\/jp\/?p=58974&#038;post_type=knowledgebase&#038;preview_id=58974"},"modified":"2025-10-02T04:44:14","modified_gmt":"2025-10-01T19:44:14","slug":"err_connection_closed","status":"publish","type":"post","link":"https:\/\/kinsta.com\/jp\/blog\/err_connection_closed\/","title":{"rendered":"\u301012\u306e\u65b9\u6cd5\u3011Chrome\u306e\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f"},"content":{"rendered":"<p>Chrome\u3067\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u3089\u3001\u300c\u3053\u306e\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\u300d\u306e\u6587\u5b57\u3068\u3068\u3082\u306b\u3001\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u300cERR_CONNECTION_CLOSED\u300d\u304c\u8868\u793a\u3055\u308c\u305f\u3068\u3044\u3046\u7d4c\u9a13\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f<\/p>\n<p>\u4ed6\u306e\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3068\u306f\u7570\u306a\u308a\u3001\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u306f\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3067\u306f\u306a\u304f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304b\u3089\u30b5\u30a4\u30c8\u3078\u306e\u63a5\u7d9a\u306b\u554f\u984c\u304c\u3042\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u4e00\u6642\u7684\u306a\u4e0d\u5177\u5408\u3067\u30da\u30fc\u30b8\u3092\u518d\u8aad\u307f\u8fbc\u307f\u3059\u308b\u3053\u3068\u3067\u3059\u3050\u306b\u89e3\u6d88\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u4e0a\u3067\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u3092\u6398\u308a\u4e0b\u3052\u300112\u306e\u89e3\u6c7a\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u3066\u3044\u304d\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<p><strong><a href=\"https:\/\/www.youtube.com\/watch?v=G-zYPXQH5jA\" target=\"_blank\" rel=\"noopener noreferrer\">\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u52d5\u753b\u3067\u306e\u89e3\u8aac\u3082\u3054\u7528\u610f\u3057\u3066\u3044\u307e\u3059<\/a>\u3002<\/strong><\/p>\n<kinsta-video src=\"https:\/\/www.youtube.com\/watch?v=G-zYPXQH5jA\"><\/kinsta-video>\n<h2>\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u3068\u306f<\/h2>\n<p>\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u306e\u610f\u5473\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u30b5\u30a4\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u6642\u306bChrome\u4e0a\u3067\u4f55\u304c\u8d77\u3053\u3063\u3066\u3044\u308b\u304b\u3092\u77e5\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_105439\" aria-describedby=\"caption-attachment-105439\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-105439 size-large\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2021\/10\/err-connection-closed-example-1024x670.png\" alt=\"\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u306e\u8868\u793a\u4f8b\" width=\"1024\" height=\"670\"><figcaption id=\"caption-attachment-105439\" class=\"wp-caption-text\">\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u306e\u8868\u793a\u4f8b<\/figcaption><\/figure>\n<p>\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3057\u305f\u308a\u3001\u30a2\u30c9\u30ec\u30b9\u30d0\u30fc\u306b\u30b5\u30a4\u30c8\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u5165\u529b\u3057\u305f\u308a\u3059\u308b\u3068\u3001Chrome\u304c\u305d\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u63a5\u7d9a\u3057\u307e\u3059\u3002\u63a5\u7d9a\u304c\u78ba\u7acb\u3055\u308c\u308b\u3068\u3001\u30b3\u30fc\u30c9\u3084\u753b\u50cf\u306a\u3069\u3001\u30da\u30fc\u30b8\u306e\u8868\u793a\u306b\u5fc5\u8981\u306a\u7279\u5b9a\u306e\u30d5\u30a1\u30a4\u30eb\u304c\u8981\u6c42\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u306f\u3001Chrome\u304c\u63a5\u7d9a\u3092\u8a66\u307f\u305f\u3082\u306e\u306e\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u307e\u305f\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u306b\u554f\u984c\u304c\u3042\u308a\u3001\u63a5\u7d9a\u3092\u78ba\u7acb\u3067\u304d\u306a\u3044\u3001\u307e\u305f\u306f\u7dad\u6301\u3067\u304d\u306a\u304f\u306a\u3063\u305f\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u30b5\u30a4\u30c8\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u63a5\u7d9a\u3067\u304d\u306a\u3044\u3053\u3068\u304b\u3089\u3001Chrome\u304c\u30b5\u30a4\u30c8\u3092\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3067\u304d\u305a\u3001\u4ee3\u308f\u308a\u306e\u3053\u306e\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n<p>\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f\u3001\u30b5\u30a4\u30c8\u306e\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u63a5\u7d9a\u3092\u59a8\u3052\u3066\u3044\u308b\u8981\u56e0\u3092\u7a81\u304d\u6b62\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u300cERR_CONNECTION_CLOSED\u300d\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u30b5\u30a4\u30c9\u306e\u554f\u984c\uff08<a href=\"https:\/\/kinsta.com\/jp\/blog\/how-to-check-if-a-website-is-down\/\">\u30b5\u30a4\u30c8\u304c\u30c0\u30a6\u30f3\u3057\u3066\u3044\u308b<\/a>\u306a\u3069\uff09\u306b\u3088\u3063\u3066\u767a\u751f\u3059\u308b\u300c<a href=\"https:\/\/kinsta.com\/jp\/blog\/err_connection_refused\/\">ERR_CONNECTION_REFUSED<\/a>\u300d\u30a8\u30e9\u30fc\u3068\u306f\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>Google Chrome\u306e\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u89e3\u6c7a\u65b9\u6cd5\uff0812\u7a2e\u985e\uff09<\/h2>\n<p>\u305d\u308c\u3067\u306f\u65e9\u901f\u3001\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3092\u7a81\u304d\u6b62\u3081\u308b\u305f\u3081\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>1. \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u3092\u78ba\u8a8d\u3059\u308b<\/h3>\n<p>\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u306b\u906d\u9047\u3057\u305f\u3089\u3001\u307e\u305a\u6700\u521d\u306b\u884c\u3046\u3079\u304d\u3053\u3068\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u306e\u78ba\u8a8d\u3067\u3059\u3002<\/p>\n<p>\u30b5\u30a4\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u6642\u306b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u304c\u5207\u65ad\u3055\u308c\u305f\u53ef\u80fd\u6027\u3082\u30bc\u30ed\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u30b1\u30fc\u30d6\u30eb\u304c\u629c\u3051\u305f\u3001Wi-Fi\u306e\u570f\u5916\u306b\u79fb\u52d5\u3057\u305f\u3001\u30eb\u30fc\u30bf\u30fc\u306b\u554f\u984c\u304c\u3042\u308b\u3001\u30e2\u30d0\u30a4\u30eb\u30c7\u30fc\u30bf\u901a\u4fe1\u304c\u4e0d\u5b89\u5b9a\u3067\u3042\u308b\u306a\u3069\u306e\u7406\u7531\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>PC\u3084\u30e2\u30d0\u30a4\u30eb\u306e\u30a2\u30d7\u30ea\u3092\u958b\u3044\u3066\u3001\u4f7f\u7528\u3067\u304d\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u306e\u3082\u624b\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001Spotify\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u3044\u306a\u3044\u66f2\u3092\u518d\u751f\u3057\u3066\u307f\u308b\u3053\u3068\u3067\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u304c\u78ba\u7acb\u3055\u308c\u3066\u3044\u308b\u304b\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u554f\u984c\u306a\u304f\u518d\u751f\u3067\u304d\u308b\u5834\u5408\u306f\u3001\u539f\u56e0\u306f\u4ed6\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>2. \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u3092\u30ea\u30bb\u30c3\u30c8\u3059\u308b<\/h3>\n<p>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304c\u6b63\u5e38\u306b\u52d5\u4f5c\u3057\u3066\u3044\u3066\u3082\u3001\u30c7\u30d0\u30a4\u30b9\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u306b\u8aa4\u308a\u304c\u3042\u308a\u3001\u30b5\u30a4\u30c8\u3078\u306e\u63a5\u7d9a\u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3001\u3053\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u539f\u56e0\u306f\u4e00\u822c\u306bTCP\/IP\u8a2d\u5b9a\u306b\u3042\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u3092\u30ea\u30bb\u30c3\u30c8\u3059\u308b\u3053\u3068\u3067\u89e3\u6c7a\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4>Windows\u3067\u306e\u30ea\u30bb\u30c3\u30c8\u65b9\u6cd5<\/h4>\n<p>Windows\u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u3092\u30ea\u30bb\u30c3\u30c8\u3059\u308b\u306b\u306f\u3001\u7ba1\u7406\u8005\u3068\u3057\u3066\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u3092\u958b\u304d\u307e\u3059\uff08\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u3092\u53f3\u30af\u30ea\u30c3\u30af\u3057\u3066\u300c<strong>\u7ba1\u7406\u8005\u3068\u3057\u3066\u5b9f\u884c<\/strong>\u300d\u3092\u9078\u629e\uff09\u3002<\/p>\n<p>\u30d7\u30ed\u30f3\u30d7\u30c8\u3092\u958b\u3044\u305f\u3089\u3001\u3044\u304f\u3064\u304b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u306f\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u8cbc\u308a\u4ed8\u3051\u3001<strong>Enter<\/strong>\u30ad\u30fc\u3092\u62bc\u3057\u3066TCP\/IP\u8a2d\u5b9a\u3092\u30ea\u30bb\u30c3\u30c8\u3057\u307e\u3059\u3002<\/p>\n<pre>netsh int ip reset<\/pre>\n<p>\u7d9a\u3044\u3066\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3067Windows Sockets\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\uff08Winsock\uff09\u3092\u30ea\u30bb\u30c3\u30c8\u3002<\/p>\n<pre>netsh winsock reset<\/pre>\n<p>\u6700\u5f8c\u306b\u3001\u5909\u66f4\u3092\u78ba\u5b9a\u3059\u308b\u305f\u3081\u306b\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3092\u518d\u8d77\u52d5\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<figure id=\"attachment_105441\" aria-describedby=\"caption-attachment-105441\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-105441 size-large\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2021\/10\/reset-tcp-ip-windows-1024x592.png\" alt=\"\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u3067\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\" width=\"1024\" height=\"592\"><figcaption id=\"caption-attachment-105441\" class=\"wp-caption-text\">\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u3067\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c<\/figcaption><\/figure>\n<h4>macOS\u3067\u306e\u30ea\u30bb\u30c3\u30c8\u65b9\u6cd5<\/h4>\n<p>macOS\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4f7f\u7528\u305b\u305a\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u3092\u30ea\u30bb\u30c3\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u300c<strong>\u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a<\/strong>\u300d\u3092\u958b\u304f<\/li>\n<li>\u300c<strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af<\/strong>\u300d\u30bf\u30d6\u3092\u958b\u304f<\/li>\n<li>\u63a5\u7d9a\u3057\u3066\u3044\u308b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u9078\u629e\u3059\u308b<\/li>\n<li>\u300c<strong>\u8a73\u7d30<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af<\/li>\n<li>\u300c<strong>TCP\/IP<\/strong>\u300d\u30bf\u30d6\u3092\u9078\u629e<\/li>\n<li>\u300c<strong>DHCP\u30ea\u30fc\u30b9\u3092\u66f4\u65b0<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af<\/li>\n<\/ol>\n<h3>3. \u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u307e\u305f\u306f\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u30bd\u30d5\u30c8\u306e\u8a2d\u5b9a\u3092\u78ba\u8a8d\u3059\u308b<\/h3>\n<p>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3084\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u30bd\u30d5\u30c8\u306e\u8a2d\u5b9a\u304c\u53b3\u3057\u3059\u304e\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u5b89\u5168\u78ba\u4fdd\u306e\u305f\u3081\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u304c\u30b5\u30a4\u30c8\u3078\u306e\u63a5\u7d9a\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u308c\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-a-firewall\/\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/a>\u307e\u305f\u306f\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u30bd\u30d5\u30c8\u3092\u4e00\u6642\u7684\u306b\u7121\u52b9\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u3067\u30a8\u30e9\u30fc\u304c\u89e3\u6d88\u3055\u308c\u308b\u5834\u5408\u306f\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u8a2d\u5b9a\u3092\u30ea\u30bb\u30c3\u30c8\u3057\u3066\u6f5c\u5728\u7684\u306a\u8a2d\u5b9a\u30df\u30b9\u3092\u89e3\u6c7a\u3059\u308b\u304b\u3001\u5225\u306e\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u30bd\u30d5\u30c8\u306b\u79fb\u884c\u3057\u307e\u3059\u3002<\/p>\n<p>Windows\u3068macOS\u306e\u5185\u8535\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u7121\u52b9\u3059\u308b\u65b9\u6cd5\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>Windows<\/strong>\uff1a\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30d1\u30cd\u30eb\u3092\u958b\u304d\u3001\u300c<strong>\u30b7\u30b9\u30c6\u30e0\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3<\/strong>\u300d\uff1e\u300c<strong>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u72b6\u614b\u306e\u78ba\u8a8d<\/strong>\u300d\uff1e\u300c<strong>Windows Defender \u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u6709\u52b9\u5316\u307e\u305f\u306f\u7121\u52b9\u5316<\/strong>\u300d\uff1e\u300c<strong>Windows Defender \u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u7121\u52b9\u306b\u3059\u308b<\/strong>\u300d\u3092\u9078\u629e<\/li>\n<li><strong>macOS<\/strong>\uff1a\u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a\u3092\u958b\u304d\u3001\u300c<strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af<\/strong>\u300d\uff1e\u300c<strong>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/strong>\u300d\u306b\u79fb\u52d5\u3057\u3066\u30c8\u30b0\u30eb\u30b9\u30a4\u30c3\u30c1\u3092\u30aa\u30d5<\/li>\n<\/ul>\n<figure id=\"attachment_105438\" aria-describedby=\"caption-attachment-105438\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-105438 size-large\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2021\/10\/disable-windows-firewall-1024x631.png\" alt=\"Windows Defender \u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u7121\u52b9\u5316\" width=\"1024\" height=\"631\"><figcaption id=\"caption-attachment-105438\" class=\"wp-caption-text\">Windows Defender \u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u7121\u52b9\u5316<\/figcaption><\/figure>\n<h3>4. \u4eee\u60f3\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08VPN\uff09\u3092\u5229\u7528\u3059\u308b<\/h3>\n<p>\u7279\u5b9a\u306e\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3068\u304d\u306b\u3060\u3051\u3053\u306e\u30a8\u30e9\u30fc\u304c\u8868\u793a\u3055\u308c\u308b\u5834\u5408\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\uff08ISP\uff09\u304c\u305d\u306e\u30b5\u30a4\u30c8\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5\u306f\u3001<a href=\"https:\/\/protonvpn.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">ProtonVPN<\/a>\uff08\u7121\u6599\uff09\u306e\u3088\u3046\u306aVPN\u30b5\u30fc\u30d3\u30b9\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002VPN\u306f\u63a5\u7d9a\u3092\u6697\u53f7\u5316\u3057\u3001ISP\u306b\u3088\u308b\u30d6\u30ed\u30c3\u30af\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>5. VPN\u307e\u305f\u306f\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3092\u7121\u52b9\u306b\u3059\u308b<\/h3>\n<p>VPN\u306e\u4f7f\u7528\u304c\u89e3\u6c7a\u65b9\u6cd5\u306b\u306a\u308a\u5f97\u308b\u4e00\u65b9\u3067\u3001<a href=\"https:\/\/kinsta.com\/blog\/proxy-vs-vpn\/\">VPN\u3084\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc<\/a>\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30b5\u30fc\u30d3\u30b9\u304c\u6b63\u3057\u304f\u52d5\u4f5c\u3057\u3066\u3044\u306a\u3044\u3068\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3059\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001\u4f7f\u7528\u3057\u3066\u3044\u308bVPN\u3084\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3092\u7121\u52b9\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u3067\u30a8\u30e9\u30fc\u304c\u89e3\u6d88\u3055\u308c\u308b\u3088\u3046\u3067\u3042\u308c\u3070\u3001VPN\u307e\u305f\u306f\u30d7\u30ed\u30ad\u30b7\u304c\u539f\u56e0\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>VPN\u3092\u7121\u52b9\u306b\u3059\u308b\u306b\u306f\u3001\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u81ea\u4f53\u3092\u9589\u3058\u308b\u304b\u7121\u52b9\u306b\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070Chrome\u306e\u62e1\u5f35\u6a5f\u80fd\u3067VPN\u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001Chrome\u306e\u300c<strong>\u8a2d\u5b9a<\/strong>\u300d\uff1e\u300c<strong>\u62e1\u5f35\u6a5f\u80fd<\/strong>\u300d\u304b\u3089\u7121\u52b9\u306b\u3067\u304d\u307e\u3059\uff08\u62e1\u5f35\u6a5f\u80fd\u306b\u3064\u3044\u3066\u306f\u5f8c\u307b\u3069\u8a73\u3057\u304f\uff09\u3002<\/p>\n<p>\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3092\u7121\u52b9\u306b\u3059\u308b\u306b\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u306e\u63a5\u7d9a\u8a2d\u5b9a\u306b\u79fb\u52d5\u3057\u307e\u3059\u3002Windows\u3067\u306e\u624b\u9806\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ol>\n<li>\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30d1\u30cd\u30eb\u3092\u958b\u304d\u3001\u300c<strong>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30aa\u30d7\u30b7\u30e7\u30f3<\/strong>\u300d\u3092\u691c\u7d22<\/li>\n<li>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u306e\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u3092\u958b\u304f<\/li>\n<li>\u300c<strong>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong>\u300d\u306e\u300c<strong>\u63a5\u7d9a<\/strong>\u300d\u30bf\u30d6\u3092\u958b\u304f<\/li>\n<li>\u300c<strong>LAN \u306e\u8a2d\u5b9a<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af<\/li>\n<li>\u300c<strong>\u8a2d\u5b9a\u3092\u81ea\u52d5\u7684\u306b\u691c\u51fa\u3059\u308b<\/strong>\u300d\u304a\u3088\u3073\u300c<strong>LAN \u306b\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u4f7f\u7528\u3059\u308b<\/strong>\u300d\u306e\u30c1\u30a7\u30c3\u30af\u3092\u5916\u3059<\/li>\n<\/ol>\n<figure id=\"attachment_105448\" aria-describedby=\"caption-attachment-105448\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-105448 size-large\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2021\/10\/disable-proxy-windows-1024x633.jpg\" alt=\"Windows\u3067\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3092\u7121\u52b9\u5316\" width=\"1024\" height=\"633\"><figcaption id=\"caption-attachment-105448\" class=\"wp-caption-text\">Windows\u3067\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3092\u7121\u52b9\u5316<\/figcaption><\/figure>\n<p><a href=\"https:\/\/support.apple.com\/en-vn\/guide\/mac-help\/mchlp2591\/mac\">macOS\u3067\u306e\u30d7\u30ed\u30ad\u30b7\u8a2d\u5b9a\u306e\u7ba1\u7406\u65b9\u6cd5\u306f\u3053\u3061\u3089<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>6. DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2\u3059\u308b<\/h3>\n<p>\u30b5\u30a4\u30c8\u3092\u8a2a\u554f\u3059\u308b\u969b\u3001\u30d6\u30e9\u30a6\u30b6\u3068\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306f\u3001\u8a2a\u554f\u5148\u306e<a href=\"https:\/\/kinsta.com\/blog\/choose-domain-name\/\">\u30c9\u30e1\u30a4\u30f3<\/a>\u306b\u7d10\u4ed8\u3044\u3066\u3044\u308b<a href=\"https:\/\/kinsta.com\/jp\/blog\/dedicated-ip-address\/\">\u30b5\u30fc\u30d0\u30fc\u306e\u5b9f\u969b\u306eIP\u30a2\u30c9\u30ec\u30b9<\/a>\u3092\u8abf\u3079\u308b\u624b\u6bb5\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306f\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-dns\/\">\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\u30b7\u30b9\u30c6\u30e0\uff08DNS\uff09<\/a>\u3092\u5229\u7528\u3057\u3066<a href=\"https:\/\/kinsta.com\/jp\/tools\/what-is-my-ip\/\">IP\u30a2\u30c9\u30ec\u30b9\u3092\u8abf\u3079\u307e\u3059<\/a>\u3002<\/p>\n<p>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5229\u7528\u306e\u9ad8\u901f\u5316\u3092\u56f3\u308b\u305f\u3081\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306f\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u30ed\u30fc\u30ab\u30eb\u306eDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002\u3053\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4f55\u3089\u304b\u306e\u8aa4\u308a\u304c\u3042\u308b\u5834\u5408\u3082\u3001\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306b\u3064\u3044\u3066\u306f\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/flush-dns\/\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2<\/a>\u3059\u308b\u3053\u3068\u3067\u3001\u6709\u52b9\u306aIP\u30a2\u30c9\u30ec\u30b9\u3078\u306e\u63a5\u7d9a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2\u3057\u305f\u3089\u3001\u4ee5\u4e0b\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066Chrome\u30d6\u30e9\u30a6\u30b6\u306eDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u3082\u30af\u30ea\u30a2\u3057\u307e\u3059\u3002<\/p>\n<p><code>chrome:\/\/net-internals\/#dns<\/code><\/p>\n<p>\u300c<strong>Clear host cache<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_59429\" aria-describedby=\"caption-attachment-59429\" style=\"width: 520px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-59429 size-full\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-clear-hostcache.png\" alt=\"Chrome\u3067DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2\" width=\"520\" height=\"173\" srcset=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-clear-hostcache.png 520w, https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-clear-hostcache-300x100.png 300w\" sizes=\"auto, (max-width: 520px) 100vw, 520px\" \/><figcaption id=\"caption-attachment-59429\" class=\"wp-caption-text\">Chrome\u3067DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2<\/figcaption><\/figure>\n<h3>7. Chrome\u306e\u30d6\u30e9\u30a6\u30b6\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2\u3059\u308b<\/h3>\n<p>DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30af\u30ea\u30a2\u306b\u52a0\u3048\u3066\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/how-to-clear-browser-cache\/\">Chrome\u30d6\u30e9\u30a6\u30b6\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3082\u30af\u30ea\u30a2<\/a>\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u30d6\u30e9\u30a6\u30b8\u30f3\u30b0\u9ad8\u901f\u5316\u306e\u305f\u3081\u3001Chrome\u306f\u30b5\u30a4\u30c8\u306e\u4e00\u90e8\u9759\u7684\u30d5\u30a1\u30a4\u30eb\u3092<a href=\"https:\/\/kinsta.com\/blog\/what-is-cache\/\">\u30d6\u30e9\u30a6\u30b6\u30ad\u30e3\u30c3\u30b7\u30e5<\/a>\u3068\u547c\u3070\u308c\u308b\u30ed\u30fc\u30ab\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002\u3053\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u7834\u640d\u3059\u308b\u3068\u3001\u300cERR_CONNECTION_CLOSED\u300d\u3092\u306f\u3058\u3081\u3068\u3059\u308b\u69d8\u3005\u306a\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>Chrome\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2\u3059\u308b\u306b\u306f\u3001Chrome\u30d6\u30e9\u30a6\u30b6\u30d0\u30fc\u304b\u3089\u4ee5\u4e0b\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<\/p>\n<p><code>chrome:\/\/settings\/privacy<\/code><\/p>\n<p>\u6b21\u306b\u3001\u300c<strong>\u95b2\u89a7\u5c65\u6b74\u30c7\u30fc\u30bf\u3092\u524a\u9664<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_59430\" aria-describedby=\"caption-attachment-59430\" style=\"width: 1237px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-59430 size-full\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-clear-cache.png\" alt=\"Chrome\u306e\u95b2\u89a7\u5c65\u6b74\u30c7\u30fc\u30bf\u3092\u524a\u9664\" width=\"1237\" height=\"737\" srcset=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-clear-cache.png 1237w, https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-clear-cache-300x179.png 300w, https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-clear-cache-1024x610.png 1024w, https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-clear-cache-768x458.png 768w\" sizes=\"auto, (max-width: 1237px) 100vw, 1237px\" \/><figcaption id=\"caption-attachment-59430\" class=\"wp-caption-text\">Chrome\u306e\u95b2\u89a7\u5c65\u6b74\u30c7\u30fc\u30bf\u3092\u524a\u9664<\/figcaption><\/figure>\n<p>\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u30a6\u30a3\u30f3\u30c9\u30a6\u3067\u3001\u30af\u30ea\u30a2\u3059\u308b\u30c7\u30fc\u30bf\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u671f\u9593\u306b\u300c<strong>\u5168\u671f\u9593<\/strong>\u300d\u3092\u9078\u629e<\/li>\n<li>\u30d6\u30e9\u30a6\u30b6\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2\u3059\u308b\u306b\u306f\u3001\u300c<strong>\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u753b\u50cf\u3068\u30d5\u30a1\u30a4\u30eb<\/strong>\u300d\u3092\u9078\u629e<\/li>\n<li>\u300c<strong>\u30c7\u30fc\u30bf\u3092\u524a\u9664<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u78ba\u5b9a<\/li>\n<\/ol>\n<figure id=\"attachment_59431\" aria-describedby=\"caption-attachment-59431\" style=\"width: 525px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-59431 size-full\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/choose-clear-cache.png\" alt=\"\u524a\u9664\u3059\u308b\u30c7\u30fc\u30bf\u3092\u9078\u629e\" width=\"525\" height=\"489\" srcset=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/choose-clear-cache.png 525w, https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/choose-clear-cache-300x279.png 300w\" sizes=\"auto, (max-width: 525px) 100vw, 525px\" \/><figcaption id=\"caption-attachment-59431\" class=\"wp-caption-text\">\u524a\u9664\u3059\u308b\u30c7\u30fc\u30bf\u3092\u9078\u629e<\/figcaption><\/figure>\n<h3>8. Cloudflare DNS\uff081.1.1.1\uff09\u3092\u4f7f\u7528\u3059\u308b<\/h3>\n<p>\u5148\u307b\u3069DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30af\u30ea\u30a2\u306b\u3064\u3044\u3066\u89e6\u308c\u307e\u3057\u305f\u3002DNS\u3068\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3068Chrome\u304c\u30b5\u30a4\u30c8\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u80cc\u5f8c\u306b\u3042\u308b\u30b5\u30fc\u30d0\u30fc\u306e<a href=\"https:\/\/kinsta.com\/jp\/blog\/ipv4-vs-ipv6\/\">IP<\/a>\u30a2\u30c9\u30ec\u30b9\u3092\u8abf\u3079\u308b\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u691c\u7d22\u3092\u5b9f\u884c\u3059\u308bDNS\u30b5\u30fc\u30d3\u30b9\u306f\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3067\u8a2d\u5b9a\u53ef\u80fd\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u30b5\u30fc\u30d3\u30b9\u306b\u554f\u984c\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f\u3001<a href=\"https:\/\/blog.cloudflare.com\/announcing-1111\/\" target=\"_blank\" rel=\"noopener noreferrer\">Cloudflare\u306eDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u30b5\u30fc\u30d3\u30b9\u306e1.1.1.1<\/a>\uff08\u7121\u6599\uff09\u3092\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<a href=\"https:\/\/developers.cloudflare.com\/1.1.1.1\/setup-1.1.1.1\">\u30c7\u30d0\u30a4\u30b9\u5225\u306e1.1.1.1\u306e\u8a2d\u5b9a\u65b9\u6cd5\u306f\u3053\u3061\u3089<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>9. Chrome\u62e1\u5f35\u6a5f\u80fd\u3092\u7121\u52b9\u306b\u3059\u308b<\/h3>\n<p><a href=\"https:\/\/kinsta.com\/blog\/best-chrome-extensions\/\">Chrome\u62e1\u5f35\u6a5f\u80fd<\/a>\u306e\u4e2d\u306b\u306f\u3001\u4f55\u3089\u304b\u306e\u65b9\u6cd5\u3067\u63a5\u7d9a\u3092\u59a8\u5bb3\u3057\u3001\u610f\u56f3\u305b\u305a\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u3092\u30c8\u30ea\u30ac\u30fc\u3059\u308b\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/how-to-remove-chrome-extensions\/\">\u3059\u3079\u3066\u306e\u62e1\u5f35\u6a5f\u80fd\u3092\u7121\u52b9\u5316<\/a>\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u305d\u306e\u5f8c\u30a8\u30e9\u30fc\u304c\u89e3\u6d88\u3055\u308c\u308c\u3070\u3001\u3044\u305a\u308c\u304b\u306e\u62e1\u5f35\u6a5f\u80fd\u306b\u554f\u984c\u304c\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u7279\u5b9a\u3059\u308b\u305f\u3081\u3001\u62e1\u5f35\u6a5f\u80fd\u30921\u3064\u305a\u3064\u6709\u52b9\u5316\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>Chrome\u62e1\u5f35\u6a5f\u80fd\u306e\u7ba1\u7406\u30da\u30fc\u30b8\u306b\u306f\u300c<strong>\u8a2d\u5b9a<\/strong>\u300d\uff1e\u300c<strong>\u62e1\u5f35\u6a5f\u80fd<\/strong>\u300d\u3001\u307e\u305f\u306f\u4ee5\u4e0b\u306e\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p><code>chrome:\/\/extensions\/<\/code><\/p>\n<figure id=\"attachment_105440\" aria-describedby=\"caption-attachment-105440\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-105440 size-large\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2021\/10\/manage-chrome-extensions-1024x695.jpg\" alt=\"Chrome\u62e1\u5f35\u6a5f\u80fd\u306e\u7ba1\u7406\u30da\u30fc\u30b8\" width=\"1024\" height=\"695\"><figcaption id=\"caption-attachment-105440\" class=\"wp-caption-text\">Chrome\u62e1\u5f35\u6a5f\u80fd\u306e\u7ba1\u7406\u30da\u30fc\u30b8<\/figcaption><\/figure>\n<h3>10. Chrome\u3092\u66f4\u65b0\u307e\u305f\u306f\u518d\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b<\/h3>\n<p>\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u306eChrome \u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3082\u3001\u4e92\u63db\u6027\u3084\u8a2d\u5b9a\u306e\u554f\u984c\u3067\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3057\u305f\u304c\u3063\u3066\u3001Chrome\u306e\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3082\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u307e\u305f\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066Chrome\u3092\u518d\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u307f\u308b\u306e\u3082\u624b\u3067\u3059\u3002<\/p>\n<p>Chrome\u306e\u66f4\u65b0\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30a2\u30c9\u30ec\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<\/p>\n<p><code>chrome:\/\/settings\/help<\/code><\/p>\n<p>\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3001\u65b0\u3057\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u3042\u308b\u5834\u5408\u306f\u81ea\u52d5\u7684\u306b\u66f4\u65b0\u304c\u884c\u308f\u308c\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u300c<strong>\u518d\u8d77\u52d5<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u3001\u30d6\u30e9\u30a6\u30b6\u3092\u518d\u8d77\u52d5\u3059\u308c\u3070\u5b8c\u4e86\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_105443\" aria-describedby=\"caption-attachment-105443\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-105443 size-large\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2021\/10\/update-chrome-1024x624.jpg\" alt=\"Chrome\u3092\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u66f4\u65b0\" width=\"1024\" height=\"624\"><figcaption id=\"caption-attachment-105443\" class=\"wp-caption-text\">Chrome\u3092\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u66f4\u65b0<\/figcaption><\/figure>\n<p>Android\u307e\u305f\u306fiOS\u30c7\u30d0\u30a4\u30b9\u3067\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30a2\u30d7\u30ea\u30b9\u30c8\u30a2\u307e\u305f\u306f\u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a\u304b\u3089Chrome\u30a2\u30d7\u30ea\u3092\u66f4\u65b0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>11. Chrome\u306e\u8a2d\u5b9a\u3092\u30ea\u30bb\u30c3\u30c8\u3059\u308b<\/h3>\n<p>Chrome\u306b\u554f\u984c\u304c\u3042\u308b\u53ef\u80fd\u6027\u3092\u6392\u9664\u3059\u308b\u306b\u306f\u3001Chrome\u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u8a2d\u5b9a\u306b\u30ea\u30bb\u30c3\u30c8\u3057\u307e\u3059\u3002<\/p>\n<p>Chrome\u306b\u306f\u3053\u306e\u305f\u3081\u306e\u6a5f\u80fd\u304c\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u300c<strong>\u8a2d\u5b9a<\/strong>\u300d\uff1e\u300c<strong>\u8a2d\u5b9a\u306e\u30ea\u30bb\u30c3\u30c8<\/strong>\u300d\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3001\u300c<strong>\u8a2d\u5b9a\u3092\u5143\u306e\u898f\u5b9a\u5024\u306b\u623b\u3059<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_59432\" aria-describedby=\"caption-attachment-59432\" style=\"width: 1220px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-59432 size-full\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-reset.png\" alt=\"Chrome\u306e\u8a2d\u5b9a\u3092\u5143\u306e\u898f\u5b9a\u5024\u306b\u623b\u3059\" width=\"1220\" height=\"723\" srcset=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-reset.png 1220w, https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-reset-300x178.png 300w, https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-reset-1024x607.png 1024w, https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/07\/chrome-reset-768x455.png 768w\" sizes=\"auto, (max-width: 1220px) 100vw, 1220px\" \/><figcaption id=\"caption-attachment-59432\" class=\"wp-caption-text\">Chrome\u306e\u8a2d\u5b9a\u3092\u5143\u306e\u898f\u5b9a\u5024\u306b\u623b\u3059<\/figcaption><\/figure>\n<aside role=\"note\" class=\"wp-block-kinsta-notice is-style-important\">\n            <h3>Important<\/h3>\n        <p>\u3053\u306e\u64cd\u4f5c\u306b\u3088\u308a\u3001\u30d6\u30c3\u30af\u30de\u30fc\u30af\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u3001\u95b2\u89a7\u5c65\u6b74\u306e\u3088\u3046\u306a\u4fdd\u5b58\u30c7\u30fc\u30bf\u3082\u524a\u9664\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/aside>\n\n<h3>12. \u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u30de\u30eb\u30a6\u30a7\u30a2\u3092\u30b9\u30ad\u30e3\u30f3\u3059\u308b<\/h3>\n<p>\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u539f\u56e0\u3068\u3057\u3066\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306b<a href=\"https:\/\/kinsta.com\/jp\/blog\/the-site-ahead-contains-malware\/\">\u60aa\u610f\u306e\u3042\u308b\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3084\u30a6\u30a4\u30eb\u30b9<\/a>\u304c\u5b58\u5728\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u5305\u62ec\u7684\u306b\u3053\u306e\u554f\u984c\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u306b\u306f\u3001<a href=\"https:\/\/www.malwarebytes.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Malwarebytes<\/a>\u306a\u3069\u306e\u30de\u30eb\u30a6\u30a7\u30a2\u30b9\u30ad\u30e3\u30ca\u30fc\u3092\u4f7f\u7528\u3057\u3066\u3001\u30c7\u30d0\u30a4\u30b9\u306e<a href=\"https:\/\/kinsta.com\/blog\/website-security-check\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u30de\u30eb\u30a6\u30a7\u30a2\u30b9\u30ad\u30e3\u30f3\u3092\u5b9f\u884c<\/a>\u3059\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u306f\u3001\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u3066\u767a\u751f\u3059\u308bGoogle Chrome\u56fa\u6709\u306e\u30a8\u30e9\u30fc\u3067\u3059\u3002\u3053\u308c\u306f\u30c7\u30d0\u30a4\u30b9\u306e\u63a5\u7d9a\u306b\u554f\u984c\u304c\u3042\u308a\u3001Chrome\u304c\u30b5\u30a4\u30c8\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u6b63\u5e38\u306b\u63a5\u7d9a\u3067\u304d\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u306e\u63a5\u7d9a\u3092\u59a8\u3052\u3066\u3044\u308b\u539f\u56e0\u3092\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u3054\u7d39\u4ecb\u3057\u305f12\u306e\u65b9\u6cd5\u3092\u9806\u756a\u306b\u5b9f\u8df5\u3057\u3066\u3044\u3051\u3070\u3001\u30a8\u30e9\u30fc\u3092\u89e3\u6c7a\u3057\u30d6\u30e9\u30a6\u30b8\u30f3\u30b0\u3092\u518d\u958b\u3067\u304d\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Chrome\u3067\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u3089\u3001 &#8230;<\/p>\n","protected":false},"author":117,"featured_media":58975,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[],"topic":[754,821],"class_list":["post-58974","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","topic-chrome-errors","topic-website-errors"],"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>\u301012\u306e\u65b9\u6cd5\u3011Chrome\u306e\u300cERR_CONNECTION_CLOSED\u300d\u30a8\u30e9\u30fc\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f<\/title>\n<meta name=\"description\" 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