{"id":476912,"date":"2023-08-09T09:05:02","date_gmt":"2023-08-09T09:05:02","guid":{"rendered":""},"modified":"2023-09-05T11:13:39","modified_gmt":"2023-09-05T11:13:39","slug":"dns-port","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/jp\/wiki\/dns-port\/","title":{"rendered":"DNS\u30dd\u30fc\u30c8"},"content":{"rendered":"<p>\u30c9\u30e1\u30a4\u30f3 \u30cd\u30fc\u30e0 \u30b7\u30b9\u30c6\u30e0 (DNS) \u306f\u3001\u4eba\u9593\u304c\u8aad\u3081\u308b\u30c9\u30e1\u30a4\u30f3\u540d\u3092 IP \u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3059\u308b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u91cd\u8981\u306a\u90e8\u5206\u3067\u3042\u308a\u3001\u30c7\u30d0\u30a4\u30b9\u304c\u76f8\u4e92\u306b\u4f4d\u7f6e\u3092\u7279\u5b9a\u3057\u3066\u901a\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002 DNS \u306f\u52d5\u4f5c\u306b\u3055\u307e\u3056\u307e\u306a\u30dd\u30fc\u30c8\u3092\u4f7f\u7528\u3057\u307e\u3059\u304c\u3001\u6700\u3082\u91cd\u8981\u306a\u3082\u306e\u306e 1 \u3064\u306f DNS \u30dd\u30fc\u30c8\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u7279\u306b\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306b\u95a2\u9023\u3057\u305f DNS \u30dd\u30fc\u30c8\u306e\u6b74\u53f2\u3001\u69cb\u9020\u3001\u7a2e\u985e\u3001\u4f7f\u7528\u6cd5\u3001\u304a\u3088\u3073\u5c06\u6765\u306e\u5c55\u671b\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>DNS \u30dd\u30fc\u30c8\u306e\u8d77\u6e90\u3068\u305d\u306e\u6700\u521d\u306e\u8a00\u53ca\u306e\u6b74\u53f2<\/h2>\n<p>DNS \u30d7\u30ed\u30c8\u30b3\u30eb\u306f 1983 \u5e74\u306b\u521d\u3081\u3066\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u304c\u3001DNS \u30dd\u30fc\u30c8\u756a\u53f7 (UDP \u30dd\u30fc\u30c8 53) \u306e\u4ed5\u69d8\u306f\u3001\u305d\u306e\u5f8c 1983 \u5e74 11 \u6708\u306b RFC 883 \u3067\u5b9a\u7fa9\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u306f\u3001UDP \u3068 TCP \u306e\u4e21\u65b9\u306e\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8 \u30d7\u30ed\u30c8\u30b3\u30eb\u306e DNS \u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u3001DNS \u30af\u30a8\u30ea\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u5fdc\u7b54\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u4ea4\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>DNS \u30dd\u30fc\u30c8\u306b\u95a2\u3059\u308b\u8a73\u7d30\u60c5\u5831\u3002\u30c8\u30d4\u30c3\u30af DNS \u30dd\u30fc\u30c8\u3092\u5c55\u958b\u3057\u307e\u3059\u3002<\/h2>\n<p>DNS \u30dd\u30fc\u30c8\u306f\u3001UDP (\u30e6\u30fc\u30b6\u30fc \u30c7\u30fc\u30bf\u30b0\u30e9\u30e0 \u30d7\u30ed\u30c8\u30b3\u30eb) \u3068 TCP (\u4f1d\u9001\u5236\u5fa1\u30d7\u30ed\u30c8\u30b3\u30eb) \u306e 2 \u3064\u306e\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8 \u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4f7f\u7528\u3057\u3066\u52d5\u4f5c\u3057\u307e\u3059\u3002 UDP \u306f\u3001DNS \u30af\u30a8\u30ea\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u6700\u3082\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308a\u3001\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u30ec\u30b9\u306e\u6027\u8cea\u306b\u3088\u308a\u9ad8\u901f\u306a\u901a\u4fe1\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u4e00\u65b9\u3001TCP \u306f\u3001UDP \u30d1\u30b1\u30c3\u30c8\u306e\u6700\u5927\u30b5\u30a4\u30ba\u3092\u8d85\u3048\u308b\u5927\u304d\u306a DNS \u5fdc\u7b54\u3001\u307e\u305f\u306f\u30be\u30fc\u30f3\u8ee2\u9001\u64cd\u4f5c\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>DNS \u30dd\u30fc\u30c8\u306e\u5185\u90e8\u69cb\u9020\u3002 DNS \u30dd\u30fc\u30c8\u306e\u4ed5\u7d44\u307f\u3002<\/h2>\n<p>DNS \u30dd\u30fc\u30c8\u306f OSI \u30e2\u30c7\u30eb\u306e\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u3067\u52d5\u4f5c\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64 (DNS \u304c\u52d5\u4f5c\u3059\u308b) \u3068\u305d\u306e\u4e0b\u306b\u3042\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u306e\u9593\u306e\u901a\u4fe1\u3092\u5bb9\u6613\u306b\u3057\u307e\u3059\u3002 DNS \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c DNS \u30b5\u30fc\u30d0\u30fc\u306b\u30af\u30a8\u30ea\u3092\u9001\u4fe1\u3059\u308b\u3068\u304d\u3001UDP \u30d7\u30ed\u30c8\u30b3\u30eb\u3068 TCP \u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u4e21\u65b9\u306e\u5b9b\u5148\u30dd\u30fc\u30c8\u3068\u3057\u3066\u30dd\u30fc\u30c8 53 \u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u6b21\u306b\u3001DNS \u30b5\u30fc\u30d0\u30fc\u306f\u9001\u4fe1\u5143\u30dd\u30fc\u30c8 53 \u3092\u4f7f\u7528\u3057\u3066\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u5fdc\u7b54\u3057\u307e\u3059\u3002<\/p>\n<p>DNS \u30af\u30a8\u30ea \u30d7\u30ed\u30bb\u30b9\u306e\u7c21\u7565\u5316\u3055\u308c\u305f\u6982\u8981\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ol>\n<li>DNS \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u3001\u30dd\u30fc\u30c8 53 (UDP \u307e\u305f\u306f TCP) \u3067 DNS \u30b5\u30fc\u30d0\u30fc\u306b\u30af\u30a8\u30ea\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/li>\n<li>DNS \u30b5\u30fc\u30d0\u30fc\u306f\u30af\u30a8\u30ea\u3092\u51e6\u7406\u3057\u3001\u8981\u6c42\u3055\u308c\u305f\u60c5\u5831\u3067\u5fdc\u7b54\u3057\u307e\u3059\u3002<\/li>\n<li>DNS \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u30dd\u30fc\u30c8 53 \u3067\u5fdc\u7b54\u3092\u53d7\u4fe1\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<h2>DNS \u30dd\u30fc\u30c8\u306e\u4e3b\u8981\u306a\u6a5f\u80fd\u306e\u5206\u6790\u3002<\/h2>\n<p>DNS \u30dd\u30fc\u30c8\u306e\u4e3b\u306a\u6a5f\u80fd\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30dd\u30fc\u30c8\u756a\u53f7<\/strong>: DNS \u306f\u3001UDP \u30d7\u30ed\u30c8\u30b3\u30eb\u3068 TCP \u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u4e21\u65b9\u306b\u30dd\u30fc\u30c8 53 \u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30d7\u30ed\u30c8\u30b3\u30eb<\/strong>: \u3088\u308a\u9ad8\u901f\u306a\u30af\u30a8\u30ea\u306b\u306f UDP \u7d4c\u7531\u306e\u901a\u4fe1\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3001\u5927\u898f\u6a21\u306a\u5fdc\u7b54\u3084\u30be\u30fc\u30f3\u8ee2\u9001\u306b\u306f TCP \u7d4c\u7531\u306e\u901a\u4fe1\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u4fe1\u983c\u6027<\/strong>UDP \u306f\u9ad8\u901f\u3067\u3059\u304c\u3001\u30a8\u30e9\u30fc \u30c1\u30a7\u30c3\u30af \u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u3042\u308a\u307e\u305b\u3093\u3002\u4e00\u65b9\u3001TCP \u306f\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30c7\u30fc\u30bf\u8ee2\u9001\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>DNS\u30dd\u30fc\u30c8\u306e\u7a2e\u985e<\/h2>\n<p>DNS \u30dd\u30fc\u30c8\u306f 1 \u3064\u3060\u3051\u3042\u308a\u3001\u30dd\u30fc\u30c8\u756a\u53f7 53 \u3067\u3059\u3002\u305f\u3060\u3057\u3001\u305d\u306e\u4f7f\u7528\u6cd5\u306f\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8 \u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u57fa\u3065\u3044\u3066 2 \u3064\u306e\u30bf\u30a4\u30d7\u306b\u5206\u985e\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p><strong>DNS UDP \u30dd\u30fc\u30c8 (UDP\/53)<\/strong>: \u3053\u308c\u306f\u3001DNS \u30af\u30a8\u30ea\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u304a\u3088\u3073\u4e3b\u8981\u306a\u901a\u4fe1\u30e2\u30fc\u30c9\u3067\u3059\u3002\u3053\u308c\u306f\u9ad8\u901f\u3067\u3059\u304c\u3001\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30c7\u30fc\u30bf\u914d\u4fe1\u3092\u4fdd\u8a3c\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<\/li>\n<li>\n<p><strong>DNS TCP \u30dd\u30fc\u30c8 (TCP\/53)<\/strong>: \u5fdc\u7b54\u30c7\u30fc\u30bf\u304cUDP\u30d1\u30b1\u30c3\u30c8\u306e\u6700\u5927\u5236\u9650\u3092\u8d85\u3048\u308b\u5834\u5408\u3084\u30be\u30fc\u30f3\u8ee2\u9001\u3092\u884c\u3046\u5834\u5408\u306bTCP\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u30bf\u30a4\u30d7\u3092\u8868\u306b\u307e\u3068\u3081\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u30bf\u30a4\u30d7<\/th>\n<th>\u30d7\u30ed\u30c8\u30b3\u30eb<\/th>\n<th>\u4f7f\u7528\u6cd5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>DNS UDP \u30dd\u30fc\u30c8<\/td>\n<td>UDP<\/td>\n<td>DNS \u30af\u30a8\u30ea\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u3002\u3082\u3063\u3068\u65e9\u304f\u3002<\/td>\n<\/tr>\n<tr>\n<td>DNS TCP \u30dd\u30fc\u30c8<\/td>\n<td>TCP<\/td>\n<td>\u5927\u898f\u6a21\u306a\u5fdc\u7b54\u307e\u305f\u306f\u8ee2\u9001\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>DNS\u30dd\u30fc\u30c8\u306e\u4f7f\u3044\u65b9\u3068\u4f7f\u7528\u306b\u95a2\u3059\u308b\u554f\u984c\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5<\/h2>\n<h3>DNS\u30dd\u30fc\u30c8\u306e\u4f7f\u7528\u65b9\u6cd5<\/h3>\n<p>DNS \u30dd\u30fc\u30c8\u306f\u4e3b\u306b\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30b5\u30fc\u30d0\u30fc\u9593\u306e DNS \u30af\u30a8\u30ea\u304a\u3088\u3073\u5fdc\u7b54\u64cd\u4f5c\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306e\u91cd\u8981\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3042\u308a\u3001\u30c9\u30e1\u30a4\u30f3\u540d\u304b\u3089 IP \u30a2\u30c9\u30ec\u30b9\u3078\u306e\u89e3\u6c7a\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/p>\n<h3>\u3054\u5229\u7528\u306b\u3042\u305f\u3063\u3066\u306e\u8ab2\u984c\u3068\u305d\u306e\u89e3\u6c7a\u7b56<\/h3>\n<ol>\n<li>\n<p><strong>DNS\u653b\u6483<\/strong>: DNS \u306f\u3001DNS \u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u3001DDoS \u653b\u6483\u3001\u30ad\u30e3\u30c3\u30b7\u30e5 \u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306a\u3069\u306e\u3055\u307e\u3056\u307e\u306a\u653b\u6483\u306b\u5bfe\u3057\u3066\u8106\u5f31\u3067\u3059\u3002DNSSEC (DNS \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u62e1\u5f35\u6a5f\u80fd) \u3092\u5b9f\u88c5\u3059\u308b\u3068\u3001\u3053\u308c\u3089\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30ea\u30b9\u30af\u3092\u8efd\u6e1b\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>DNS \u904e\u8ca0\u8377<\/strong>\uff1aDNS \u30af\u30a8\u30ea \u30ec\u30fc\u30c8\u304c\u9ad8\u3044\u304b\u3001DNS \u5fdc\u7b54\u304c\u5927\u304d\u3044\u3068\u3001DNS \u30b5\u30fc\u30d0\u30fc\u306b\u904e\u8ca0\u8377\u304c\u304b\u304b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u8ca0\u8377\u5206\u6563\u3068\u3088\u308a\u591a\u304f\u306e\u30b5\u30fc\u30d0\u30fc\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001\u3053\u306e\u554f\u984c\u306b\u5bfe\u51e6\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>DNS \u89e3\u6c7a\u306e\u9045\u5ef6<\/strong>: DNS \u5fdc\u7b54\u304c\u9045\u3044\u3068\u3001Web \u30b5\u30a4\u30c8\u306e\u8aad\u307f\u8fbc\u307f\u6642\u9593\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 DNS \u30ec\u30b3\u30fc\u30c9\u3092\u30ed\u30fc\u30ab\u30eb\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3001\u3088\u308a\u9ad8\u901f\u306a DNS \u30b5\u30fc\u30d0\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u89e3\u6c7a\u6642\u9593\u3092\u77ed\u7e2e\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u4e3b\u306a\u7279\u5fb4\u3084\u305d\u306e\u4ed6\u306e\u985e\u4f3c\u7528\u8a9e\u3068\u306e\u6bd4\u8f03\u3092\u8868\u3084\u30ea\u30b9\u30c8\u306e\u5f62\u5f0f\u3067\u793a\u3057\u307e\u3059\u3002<\/h2>\n<p>\u3053\u3053\u3067\u306f\u3001DNS \u30dd\u30fc\u30c8\u3092\u4ed6\u306e\u95a2\u9023\u7528\u8a9e\u3068\u6bd4\u8f03\u3057\u307e\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u5b66\u671f<\/th>\n<th>\u8aac\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>DNS\u30dd\u30fc\u30c8(UDP\/53)<\/td>\n<td>DNS \u30af\u30a8\u30ea\u3068\u5fdc\u7b54\u7528\u306e\u6307\u5b9a\u30dd\u30fc\u30c8\u3002<\/td>\n<\/tr>\n<tr>\n<td>HTTP \u30dd\u30fc\u30c8 (TCP\/80)<\/td>\n<td>\u6a19\u6e96\u306e\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u306a\u3044 HTTP Web \u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306b\u4f7f\u7528\u3055\u308c\u308b\u30dd\u30fc\u30c8\u3002<\/td>\n<\/tr>\n<tr>\n<td>HTTPS \u30dd\u30fc\u30c8 (TCP\/443)<\/td>\n<td>SSL\/TLS \u306b\u3088\u308b\u5b89\u5168\u306a HTTP \u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306b\u4f7f\u7528\u3055\u308c\u308b\u30dd\u30fc\u30c8\u3002<\/td>\n<\/tr>\n<tr>\n<td>FTP\u30dd\u30fc\u30c8(TCP\/21)<\/td>\n<td>FTP (\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u30d7\u30ed\u30c8\u30b3\u30eb) \u64cd\u4f5c\u306b\u4f7f\u7528\u3055\u308c\u308b\u30dd\u30fc\u30c8\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>DNS \u30dd\u30fc\u30c8\u306b\u95a2\u3059\u308b\u5c06\u6765\u306e\u5c55\u671b\u3068\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u3002<\/h2>\n<p>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304c\u9032\u5316\u3057\u7d9a\u3051\u308b\u306b\u3064\u308c\u3066\u3001DNS \u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u305d\u308c\u306b\u95a2\u9023\u3059\u308b\u30dd\u30fc\u30c8\u3082\u9032\u6b69\u3057\u3001\u6539\u5584\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u5c06\u6765\u306e\u767a\u5c55\u306e\u53ef\u80fd\u6027\u3068\u3057\u3066\u306f\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p><strong>IPv6\u306e\u5c0e\u5165<\/strong>: IPv4 \u30a2\u30c9\u30ec\u30b9\u306e\u67af\u6e07\u306b\u4f34\u3044\u3001IPv6 \u3078\u306e\u79fb\u884c\u304c\u3088\u308a\u4e00\u822c\u7684\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002 DNS \u306f IPv6 \u30ec\u30b3\u30fc\u30c9\u3068 AAAA \u30af\u30a8\u30ea\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>DNS over HTTPS (DoH)<\/strong>: DNS over HTTPS \u306f DNS \u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u6697\u53f7\u5316\u3057\u3001\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u5e83\u304f\u63a1\u7528\u3055\u308c\u3001DNS \u901a\u4fe1\u30d1\u30bf\u30fc\u30f3\u306e\u5909\u5316\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u30d9\u30fc\u30b9\u306eDNS<\/strong>\uff1aDNS\u7ba1\u7406\u306b\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u6280\u8853\u3092\u5229\u7528\u3059\u308b\u3068\u3001\u5206\u6563\u578b\u3067\u6539\u3056\u3093\u8010\u6027\u306e\u3042\u308bDNS\u30b7\u30b9\u30c6\u30e0\u3092\u5c0e\u5165\u3067\u304d\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306e\u4f7f\u7528\u65b9\u6cd5\u3084 DNS \u30dd\u30fc\u30c8\u3068\u306e\u95a2\u9023\u4ed8\u3051\u65b9\u6cd5\u3002<\/h2>\n<p>\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f\u3001DNS \u95a2\u9023\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306e\u7ba1\u7406\u3068\u6700\u9069\u5316\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u3001\u6b21\u306e\u65b9\u6cd5\u3067 DNS \u30dd\u30fc\u30c8\u306b\u95a2\u9023\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p><strong>DNS\u30d7\u30ed\u30ad\u30b7<\/strong>: \u4e00\u90e8\u306e\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f DNS \u30d7\u30ed\u30ad\u30b7\u3068\u3057\u3066\u6a5f\u80fd\u3057\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u4ee3\u308f\u3063\u3066 DNS \u30af\u30a8\u30ea\u3092\u51e6\u7406\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3001\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u6a5f\u80fd\u306e\u5411\u4e0a\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0<\/strong>: \u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f\u3001DNS \u30af\u30a8\u30ea\u3092\u8907\u6570\u306e DNS \u30b5\u30fc\u30d0\u30fc\u306b\u5206\u6563\u3057\u3001\u8ca0\u8377\u5206\u6563\u3092\u652f\u63f4\u3057\u3066\u9ad8\u53ef\u7528\u6027\u3092\u78ba\u4fdd\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30ad\u30e3\u30c3\u30b7\u30f3\u30b0<\/strong>\uff1a\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f DNS \u5fdc\u7b54\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u304d\u308b\u305f\u3081\u3001\u89e3\u6c7a\u6642\u9593\u304c\u77ed\u7e2e\u3055\u308c\u3001DNS \u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306e\u8ca0\u62c5\u304c\u8efd\u6e1b\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u95a2\u9023\u30ea\u30f3\u30af<\/h2>\n<p>DNS \u30dd\u30fc\u30c8\u3068\u95a2\u9023\u30c8\u30d4\u30c3\u30af\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u6b21\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ol>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc883\" target=\"_new\" rel=\"noopener nofollow\">RFC 883<\/a>: DNS \u30dd\u30fc\u30c8\u756a\u53f7\u306e\u72ec\u81ea\u306e\u4ed5\u69d8\u3002<\/li>\n<li><a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/what-is-dns\/\" target=\"_new\" rel=\"noopener nofollow\">DNS\u306e\u8aac\u660e<\/a>: Cloudflare\u306b\u3088\u308bDNS\u306e\u5305\u62ec\u7684\u306a\u30ac\u30a4\u30c9\u3002<\/li>\n<li><a href=\"https:\/\/www.icann.org\/dnssec\" target=\"_new\" rel=\"noopener nofollow\">DNS \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u62e1\u5f35\u6a5f\u80fd (DNSSEC)<\/a>: DNS \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3059\u308b\u305f\u3081\u306e DNSSEC \u306b\u95a2\u3059\u308b\u60c5\u5831\u3002<\/li>\n<\/ol>\n<p>\u7d50\u8ad6\u3068\u3057\u3066\u3001DNS \u30dd\u30fc\u30c8\u306f\u30c9\u30e1\u30a4\u30f3 \u30cd\u30fc\u30e0 \u30b7\u30b9\u30c6\u30e0\u306e\u91cd\u8981\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3042\u308a\u3001\u30c9\u30e1\u30a4\u30f3\u540d\u306e IP \u30a2\u30c9\u30ec\u30b9\u3078\u306e\u5909\u63db\u3092\u5bb9\u6613\u306b\u3057\u307e\u3059\u3002\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u3068\u306e\u95a2\u9023\u6027\u3084\u5c06\u6765\u306e\u958b\u767a\u306e\u53ef\u80fd\u6027\u306b\u3088\u308a\u3001DNS \u30dd\u30fc\u30c8\u306f\u5b89\u5168\u3067\u52b9\u7387\u7684\u306a\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u3092\u78ba\u4fdd\u3059\u308b\u4e0a\u3067\u91cd\u8981\u306a\u8981\u7d20\u3067\u3042\u308a\u7d9a\u3051\u307e\u3059\u3002<\/p>","protected":false},"featured_media":476913,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476912","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>DNS Port: An Encyclopedia Article<\/mark>","faq_items":[{"question":"What is the DNS port, and how does it work?","answer":"<p>The DNS port is a designated port (UDP port 53) used for Domain Name System (DNS) queries and responses. It allows devices to translate human-readable domain names into IP addresses and vice versa. DNS operates using two transport protocols: UDP for faster queries and TCP for large responses or zone transfers.<\/p>"},{"question":"How was the DNS port established, and when was it first defined?","answer":"<p>The DNS protocol was introduced in 1983, and the specification for the DNS port number (UDP port 53) was defined in RFC 883 in November 1983. This assignment ensured that DNS queries and responses could be efficiently exchanged over the network.<\/p>"},{"question":"What are the main features of the DNS port?","answer":"<p>The DNS port (UDP\/53) supports both UDP and TCP transport protocols. UDP is faster but lacks error-checking, while TCP ensures reliable data transmission. The DNS port operates at the transport layer of the OSI model, facilitating communication between the application layer (DNS) and the network layer.<\/p>"},{"question":"Are there different types of DNS ports?","answer":"<p>The DNS port itself is singular (UDP port 53), but its usage can be categorized into two types:<\/p><ol><li>DNS UDP Port (UDP\/53): The default and primary mode for faster DNS queries.<\/li><li>DNS TCP Port (TCP\/53): Used for large responses or zone transfers.<\/li><\/ol>"},{"question":"What are some common issues related to the DNS port's usage?","answer":"<p>Common issues include DNS attacks (e.g., spoofing, DDoS) that can be mitigated with DNSSEC, DNS overload, and resolution delays. Solutions involve load balancing, deploying more servers, and caching DNS records locally.<\/p>"},{"question":"How is the DNS port associated with proxy servers?","answer":"<p>Proxy servers can act as DNS proxies, handling DNS queries on behalf of clients, improving security, performance, and filtering capabilities. They can also perform load balancing, distribute DNS queries, and cache DNS responses to enhance efficiency.<\/p>"},{"question":"What are the future perspectives and technologies related to the DNS port?","answer":"<p>The future of DNS port may involve support for IPv6 records, DNS over HTTPS (DoH) adoption, and exploring blockchain-based DNS systems for decentralization and security enhancements.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/476912","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/476912\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media\/476913"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media?parent=476912"}],"curies":[{"name":"\u3046\u30fc\u3093","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}