{"id":25042,"date":"2019-11-26T04:59:07","date_gmt":"2019-11-26T12:59:07","guid":{"rendered":"https:\/\/kinsta.com\/?post_type=knowledgebase&#038;p=49143"},"modified":"2025-10-02T04:52:14","modified_gmt":"2025-10-01T19:52:14","slug":"err_quic_protocol_error","status":"publish","type":"post","link":"https:\/\/kinsta.com\/jp\/blog\/err_quic_protocol_error\/","title":{"rendered":"Chrome\u306e\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5"},"content":{"rendered":"<p>\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u306f\u3001Google Chrome\u3067\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u6642\u6298\u898b\u3089\u308c\u308b\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3002<\/p>\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<blockquote><p><strong>https:\/\/examplesite.com\/<\/strong>\u306e\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u306f\u4e00\u6642\u7684\u306b\u505c\u6b62\u3057\u3066\u3044\u308b\u304b\u3001\u65b0\u3057\u3044\u30a6\u30a7\u30d6\u30a2\u30c9\u30ec\u30b9\u306b\u79fb\u52d5\u3057\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>ERR_QUIC_PROTOCOL_ERROR<\/p><\/blockquote>\n<p>\u305d\u3053\u3067\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc\u306b\u3064\u3044\u3066\u3054\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li><a href=\"#what\">Chrome\u306e\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc\u3068\u306f<\/a><\/li>\n<li><a href=\"#fix\">Chrome\u306e\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5<\/a><\/li>\n<\/ul>\n\n<h2 id=\"what\">\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc\u3068\u306f<\/h2>\n<figure style=\"width: 1374px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2019\/07\/err-quic-protocol-error.png\" alt=\"\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc\" width=\"1374\" height=\"1105\"><figcaption class=\"wp-caption-text\">\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc<\/figcaption><\/figure>\n<p>\u305d\u306e\u540d\u524d\u304c\u793a\u3059\u3088\u3046\u306b\u3001\u3053\u306e\u30a8\u30e9\u30fc\u306f\u3001Chrome\u306eQUIC\uff08Quick UDP Internet Connections\u3001\u307e\u305f\u306f<a href=\"https:\/\/docs.google.com\/document\/d\/1gY9-YNDNAB1eip-RTPbqphgySwSNSDHLq9D5Bty4FSU\/edit\" target=\"_blank\" rel=\"noopener noreferrer\">QUIC\u30d7\u30ed\u30c8\u30b3\u30eb<\/a>\uff09\u6a5f\u80fd\u306b\u554f\u984c\u304c\u3042\u308b\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>QUIC\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001\u63a5\u7d9a\u6307\u5411\u306e\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u76ee\u7684\u3067\u3001Google\u306b\u3088\u3063\u3066\u958b\u767a\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<p><a href=\"https:\/\/w3techs.com\/technologies\/details\/ce-quic\/all\/all\" target=\"_blank\" rel=\"noopener noreferrer\">W3Techs<\/a>\u306b\u3088\u308c\u3070\u3001QUIC\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u63a1\u7528\u3057\u3066\u3044\u308b\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306f\u3001\u5168\u4f53\u306e\u7d043.2\uff05\u306e\u307f\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5927\u534a\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3067\u306f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001QUIC\u306f\u672c\u6765Google\u304c\u81ea\u793e\u88fd\u54c1\u7528\u306b\u958b\u767a\u3057\u305f\u3082\u306e\u3002\u305d\u306e\u305f\u3081\u3001<a href=\"https:\/\/kinsta.com\/blog\/youtube-stats\/\">YouTube<\/a>\u3092\u542b\u3081\u3001Google\u304c\u904b\u55b6\u3057\u3066\u3044\u308b\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3067\u306f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002QUIC\u306e\u5168\u4f53\u7684\u306a\u4f7f\u7528\u7387\u306f\u4f4e\u3044\u3082\u306e\u306e\u3001Google\u304cQUIC\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u3001\u307b\u307c\u3059\u3079\u3066\u306e\u4eba\u304c\u65e5\u3005QUIC\u3092\u77e5\u3089\u305a\u306b\u4f7f\u7528\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u306f\u3001QUIC\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u6642\u306b\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\uff08\u307e\u305f\u306fVPN\u3084\u30d7\u30ed\u30ad\u30b7\uff09\u3084Chrome\u306e\u62e1\u5f35\u6a5f\u80fd\u304c\u554f\u984c\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u3001\u3053\u306e\u30a8\u30e9\u30fc\u306fWordPress\u30b5\u30a4\u30c8\u3068\u306f\u95a2\u4fc2\u304c\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u3053\u306e\u30a8\u30e9\u30fc\u304c\u539f\u56e0\u3067<a href=\"https:\/\/kinsta.com\/blog\/locked-out-of-wordpress-admin\/\">WordPress\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u5834\u5408\u306e\u89e3\u6c7a\u65b9\u6cd5\u306f\u3053\u3061\u3089<\/a>\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2 id=\"fix\">Chrome\u306e\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5<\/h2>\n<p>\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u7b56\u306f\u3001\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u3001\u305d\u308c\u305e\u308c\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li><a href=\"#quic\">QUIC\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u7121\u52b9\u5316\u3059\u308b<\/a><\/li>\n<li><a href=\"#extensions\">\u62e1\u5f35\u6a5f\u80fd\u3092\u7121\u52b9\u5316\u3059\u308b<\/a><\/li>\n<li><a href=\"#proxy\">Windows\u306e\u30d7\u30ed\u30ad\u30b7\u8a2d\u5b9a\u3092\u898b\u76f4\u3059<\/a><\/li>\n<\/ul>\n<h3 id=\"quic\">\u65b9\u6cd51. QUIC\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u7121\u52b9\u5316\u3059\u308b<\/h3>\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u306f\u3001QUIC\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u554f\u984c\u3092\u793a\u5506\u3057\u3066\u3044\u308b\u3053\u3068\u304b\u3089\u3001Chrome\u306eQUIC\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u7121\u52b9\u306b\u3059\u308b\u3053\u3068\u3067\u89e3\u6c7a\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u306f\u3001Chrome\u30d6\u30e9\u30a6\u30b6\u306e\u30a2\u30c9\u30ec\u30b9\u30d0\u30fc\u306b\u300c<strong>chrome:\/\/flags\/<\/strong>\u300d\u3092\u8cbc\u308a\u4ed8\u3051\u3001\u691c\u7d22\u30d0\u30fc\u3067\u300cquic\u300d\u3092\u691c\u7d22\u3057\u307e\u3059\u3002<\/p>\n<p>\u300cExperimental QUIC protocol\u300d\u306e\u30c9\u30ed\u30c3\u30d7\u30c0\u30a6\u30f3\u30e1\u30cb\u30e5\u30fc\u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u304b\u3089\u300cDisabled\uff08\u7121\u52b9\u5316\uff09\u300d\u306b\u5909\u66f4\u3057\u307e\u3059\u3002<\/p>\n<figure style=\"width: 1991px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2019\/07\/err-quic-protocol-error-1.png\" alt=\"Chrome\u306eQUIC\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u7121\u52b9\u5316\" width=\"1991\" height=\"761\"><figcaption class=\"wp-caption-text\">Chrome\u306eQUIC\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u7121\u52b9\u5316<\/figcaption><\/figure>\n<p>\u7121\u52b9\u5316\u5f8c\u3001Chrome\u30d6\u30e9\u30a6\u30b6\u3092\u518d\u8d77\u52d5\u3059\u308b\u3068\u3001\u5909\u66f4\u304c\u9069\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<h3 id=\"extensions\">\u65b9\u6cd52. \u62e1\u5f35\u6a5f\u80fd\u3092\u7121\u52b9\u5316\u3059\u308b<\/h3>\n<p>\u307e\u305f\u3001Chrome\u306e\u62e1\u5f35\u6a5f\u80fd\u304c\u539f\u56e0\u306b\u306a\u3063\u3066\u3044\u308b\u53ef\u80fd\u6027\u3082\u3002<\/p>\n<p>\u3069\u306e\u62e1\u5f35\u6a5f\u80fd\u304c\u539f\u56e0\u306b\u306a\u3063\u3066\u3044\u308b\u304b\u3092\u7279\u5b9a\u3059\u308b\u306b\u306f\u3001\u62e1\u5f35\u6a5f\u80fd\u3092\u3059\u3079\u3066\u7121\u52b9\u5316\u3057\u30011\u3064\u305a\u3064\u6709\u52b9\u5316\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u3042\u308b\u62e1\u5f35\u6a5f\u80fd\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u305f\u76f4\u5f8c\u306b\u3001\u3053\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u306f\u3001\u307e\u305a\u305d\u306e\u62e1\u5f35\u6a5f\u80fd\u3092\u7121\u52b9\u5316\u3057\u3066\u307f\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n<p>\u62e1\u5f35\u6a5f\u80fd\u3092\u7121\u52b9\u306b\u3059\u308b\u306b\u306f\u3001\u30d6\u30e9\u30a6\u30b6\u306e\u30a2\u30c9\u30ec\u30b9\u30d0\u30fc\u306b\u300c<strong>chrome:\/\/extensions\/<\/strong>\u300d\u3092\u8cbc\u308a\u4ed8\u3051\u307e\u3059\u3002<\/p>\n<figure style=\"width: 2268px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2019\/07\/disable-extensions.png\" alt=\"Chrome\u306e\u62e1\u5f35\u6a5f\u80fd\u3092\u7121\u52b9\u5316\" width=\"2268\" height=\"1241\"><figcaption class=\"wp-caption-text\">Chrome\u306e\u62e1\u5f35\u6a5f\u80fd\u3092\u7121\u52b9\u5316<\/figcaption><\/figure>\n<p>\u5404\u62e1\u5f35\u6a5f\u80fd\u306e\u53f3\u4e0b\u306b\u3042\u308b\u30c8\u30b0\u30eb\u30b9\u30a4\u30c3\u30c1\u3067\u3001\u7121\u52b9\u30fb\u6709\u52b9\u3092\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3 id=\"proxy\">\u65b9\u6cd53. Windows\u306e\u30d7\u30ed\u30ad\u30b7\u8a2d\u5b9a\u3092\u898b\u76f4\u3059<\/h3>\n<p>Windows\u3092\u304a\u4f7f\u3044\u306e\u5834\u5408\u3001\u30d7\u30ed\u30ad\u30b7\u8a2d\u5b9a\u304c\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u306b\u306a\u3063\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n<p>\u307e\u305a\u306f\u3001Windows\u306e\u300c<strong>\u8a2d\u5b9a<\/strong>\u300d\u753b\u9762\u3092\u958b\u304d\u307e\u3059\uff08Windows\u30ad\u30fc\u3092\u62bc\u3057\u300c\u8a2d\u5b9a\u300d\u30ae\u30a2\u3092\u9078\u629e\uff09\u3002<\/p>\n<p>\u300c<strong>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3<\/strong>\u300d\u3092\u691c\u7d22\u3057\u3066\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<figure style=\"width: 1594px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2019\/07\/err-quic-protocol-error-3.png\" alt=\"Windows\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\" width=\"1594\" height=\"719\"><figcaption class=\"wp-caption-text\">Windows\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3<\/figcaption><\/figure>\n<p>\u6b21\u306b\u300c<strong>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong>\u300d\u753b\u9762\u306e\u300c<strong>\u63a5\u7d9a<\/strong>\u300d\u30bf\u30d6\u3092\u958b\u304d\u3001\u300c<strong>LAN\u306e\u8a2d\u5b9a<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n<figure style=\"width: 413px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\" \" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2019\/07\/err-quic-protocol-error-4.png\" alt=\"LAN\u306e\u8a2d\u5b9a\" width=\"413\" height=\"446\"><figcaption class=\"wp-caption-text\">LAN\u306e\u8a2d\u5b9a<\/figcaption><\/figure>\n<p>\u300c<strong>LAN\u306b\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3092\u4f7f\u7528\u3059\u308b<\/strong>\u300d\u306e\u9805\u76ee\u304c\u9078\u629e\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002\u78ba\u8a8d\u5f8c\u3001\u300c<strong>OK<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u304b\u3089\u300c<strong>\u9069\u7528<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u518d\u8d77\u52d5\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<figure style=\"width: 385px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\" \" src=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2019\/07\/err-quic-protocol-error-5.png\" alt=\"\u30d7\u30ed\u30ad\u30b7\u8a2d\u5b9a\u306e\u78ba\u8a8d\" width=\"385\" height=\"345\"><figcaption class=\"wp-caption-text\">\u30d7\u30ed\u30ad\u30b7\u8a2d\u5b9a\u306e\u78ba\u8a8d<\/figcaption><\/figure>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u300cERR_QUIC_PROTOCOL_ERROR\u300d\u306f\u3001Quick UDP Internet 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