{"id":476927,"date":"2023-08-09T09:05:02","date_gmt":"2023-08-09T09:05:02","guid":{"rendered":""},"modified":"2023-09-05T11:13:40","modified_gmt":"2023-09-05T11:13:40","slug":"dns-redundancy","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/jp\/wiki\/dns-redundancy\/","title":{"rendered":"DNS\u5197\u9577\u6027"},"content":{"rendered":"<h2>\u5c0e\u5165<\/h2>\n<p>DNS \u5197\u9577\u6027\u306f\u3001\u5b89\u5b9a\u3057\u305f\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u3092\u7dad\u6301\u3059\u308b\u4e0a\u3067\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u5197\u9577 DNS \u30b5\u30fc\u30d0\u30fc\u306e\u5b9f\u88c5\u306b\u3088\u308a\u3001\u30c9\u30e1\u30a4\u30f3\u540d\u89e3\u6c7a\u306e\u9ad8\u53ef\u7528\u6027\u3001\u30d5\u30a9\u30fc\u30eb\u30c8 \u30c8\u30ec\u30e9\u30f3\u30b9\u3001\u8ca0\u8377\u5206\u6563\u304c\u78ba\u4fdd\u3055\u308c\u307e\u3059\u3002DNS \u5197\u9577\u6027\u306b\u3088\u308a\u3001\u8ca0\u8377\u304c\u8907\u6570\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u5206\u6563\u3055\u308c\u308b\u305f\u3081\u3001\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u969c\u5bb3\u3084 DDoS \u653b\u6483\u304c\u767a\u751f\u3057\u3066\u3082\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u4e2d\u65ad\u3059\u308b\u3053\u3068\u306a\u304f Web \u30b5\u30a4\u30c8\u3084\u30aa\u30f3\u30e9\u30a4\u30f3 \u30b5\u30fc\u30d3\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001DNS \u5197\u9577\u6027\u306e\u6b74\u53f2\u3001\u4ed5\u7d44\u307f\u3001\u7a2e\u985e\u3001\u5c06\u6765\u306e\u5c55\u671b\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u3001\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc \u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3067\u3042\u308b OneProxy \u3068\u306e\u95a2\u9023\u6027\u306b\u7279\u306b\u91cd\u70b9\u3092\u7f6e\u304d\u307e\u3059\u3002<\/p>\n<h2>DNS \u5197\u9577\u6027\u306e\u8d77\u6e90\u3068\u521d\u671f\u306e\u8a00\u53ca<\/h2>\n<p>DNS \u5197\u9577\u6027\u306e\u6982\u5ff5\u306f\u30011980 \u5e74\u4ee3\u306b\u30c9\u30e1\u30a4\u30f3 \u30cd\u30fc\u30e0 \u30b7\u30b9\u30c6\u30e0 (DNS) \u306e\u958b\u767a\u3068\u3068\u3082\u306b\u767b\u5834\u3057\u307e\u3057\u305f\u3002\u5f53\u521d\u3001DNS \u306f\u5358\u4e00\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u4f9d\u5b58\u3057\u3066\u3044\u305f\u305f\u3081\u3001\u4fe1\u983c\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u95a2\u3057\u3066\u5927\u304d\u306a\u6b20\u70b9\u304c\u3042\u308a\u307e\u3057\u305f\u3002DNS \u306e\u5197\u9577\u6027\u306e\u5fc5\u8981\u6027\u304c\u6700\u521d\u306b\u8a00\u53ca\u3055\u308c\u305f\u306e\u306f\u30011983 \u5e74 11 \u6708\u306b\u767a\u884c\u3055\u308c\u305f RFC 882 \u306b\u9061\u308a\u307e\u3059\u3002\u3053\u306e RFC \u3067\u306f\u3001\u5358\u4e00\u969c\u5bb3\u70b9\u3092\u8efd\u6e1b\u3059\u308b\u305f\u3081\u306e\u5206\u6563 DNS \u30b7\u30b9\u30c6\u30e0\u306e\u91cd\u8981\u6027\u304c\u5f37\u8abf\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<h2>DNS\u5197\u9577\u6027\u3092\u7406\u89e3\u3059\u308b<\/h2>\n<p>DNS \u5197\u9577\u6027\u306f\u3001\u901a\u5e38\u3001\u968e\u5c64\u578b\u307e\u305f\u306f\u5206\u6563\u578b\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3067\u7de8\u6210\u3055\u308c\u305f\u8907\u6570\u306e DNS \u30b5\u30fc\u30d0\u30fc\u3092\u5c55\u958b\u3059\u308b\u3053\u3068\u3067\u5b9f\u73fe\u3055\u308c\u307e\u3059\u3002\u5404 DNS \u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u540d\u3068 IP \u30a2\u30c9\u30ec\u30b9\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u3092\u542b\u3080 DNS \u30be\u30fc\u30f3 \u30c7\u30fc\u30bf\u306e\u30b3\u30d4\u30fc\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002\u30e6\u30fc\u30b6\u30fc\u306e\u30c7\u30d0\u30a4\u30b9\u304c DNS \u30af\u30a8\u30ea\u3092\u958b\u59cb\u3059\u308b\u3068\u3001\u305d\u306e\u30af\u30a8\u30ea\u306f\u5197\u9577 DNS \u30b5\u30fc\u30d0\u30fc\u306e\u3044\u305a\u308c\u304b\u306b\u8ee2\u9001\u3055\u308c\u3001\u8981\u6c42\u3055\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u306e\u9069\u5207\u306a IP \u30a2\u30c9\u30ec\u30b9\u3067\u5fdc\u7b54\u3057\u307e\u3059\u3002<\/p>\n<h2>DNS\u5197\u9577\u6027\u306e\u5185\u90e8\u69cb\u9020\u3068\u52d5\u4f5c<\/h2>\n<p>DNS \u5197\u9577\u6027\u306e\u5185\u90e8\u69cb\u9020\u306b\u306f\u3001\u30d7\u30e9\u30a4\u30de\u30ea DNS \u30b5\u30fc\u30d0\u30fc\u3068\u30bb\u30ab\u30f3\u30c0\u30ea DNS \u30b5\u30fc\u30d0\u30fc (\u305d\u308c\u305e\u308c\u30de\u30b9\u30bf\u30fc \u30b5\u30fc\u30d0\u30fc\u3068\u30b9\u30ec\u30fc\u30d6 \u30b5\u30fc\u30d0\u30fc\u3068\u3082\u547c\u3070\u308c\u307e\u3059) \u306e\u8a2d\u5b9a\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u30d7\u30e9\u30a4\u30de\u30ea DNS \u30b5\u30fc\u30d0\u30fc\u306f\u7279\u5b9a\u306e DNS \u30be\u30fc\u30f3\u306e\u6a29\u9650\u3092\u6301\u3061\u3001\u30be\u30fc\u30f3 \u30c7\u30fc\u30bf\u306e\u30de\u30b9\u30bf\u30fc \u30b3\u30d4\u30fc\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002\u30bb\u30ab\u30f3\u30c0\u30ea DNS \u30b5\u30fc\u30d0\u30fc\u306f\u30d7\u30e9\u30a4\u30de\u30ea \u30b5\u30fc\u30d0\u30fc\u3068\u5b9a\u671f\u7684\u306b\u540c\u671f\u3057\u3066\u3001\u30be\u30fc\u30f3 \u30c7\u30fc\u30bf\u306e\u66f4\u65b0\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u3053\u306e\u540c\u671f\u30d7\u30ed\u30bb\u30b9\u306f\u30be\u30fc\u30f3\u8ee2\u9001\u3068\u547c\u3070\u308c\u3001\u3059\u3079\u3066\u306e\u30bb\u30ab\u30f3\u30c0\u30ea \u30b5\u30fc\u30d0\u30fc\u306b\u4e00\u8cab\u6027\u306e\u3042\u308b\u6700\u65b0\u306e\u60c5\u5831\u304c\u4fdd\u6301\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>DNS \u30af\u30a8\u30ea\u3092\u53d7\u4fe1\u3059\u308b\u3068\u3001\u8fd1\u63a5\u6027\u3001\u73fe\u5728\u306e\u8ca0\u8377\u3001\u307e\u305f\u306f\u4e8b\u524d\u306b\u6c7a\u5b9a\u3055\u308c\u305f\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3 \u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306a\u3069\u306e\u8981\u56e0\u306b\u57fa\u3065\u3044\u3066\u3001\u5197\u9577 DNS \u30b5\u30fc\u30d0\u30fc\u306e\u3044\u305a\u308c\u304b\u304c\u5fdc\u7b54\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u8ca0\u8377\u5206\u6563\u306b\u3088\u308a\u3001DNS \u89e3\u6c7a\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5411\u4e0a\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u30d5\u30a9\u30fc\u30eb\u30c8 \u30c8\u30ec\u30e9\u30f3\u30b9\u3082\u5b9f\u73fe\u3057\u307e\u3059\u30021 \u3064\u306e\u30b5\u30fc\u30d0\u30fc\u304c\u5230\u9054\u4e0d\u80fd\u306b\u306a\u3063\u305f\u308a\u3001\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u308a\u3057\u3066\u3082\u3001\u4ed6\u306e\u30b5\u30fc\u30d0\u30fc\u304c\u5f15\u304d\u7d9a\u304d\u53d7\u4fe1 DNS \u30af\u30a8\u30ea\u3092\u51e6\u7406\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>DNS\u5197\u9577\u6027\u306e\u4e3b\u306a\u7279\u5fb4<\/h2>\n<p>DNS \u5197\u9577\u6027\u306e\u4e3b\u306a\u6a5f\u80fd\u306f\u6b21\u306e\u3088\u3046\u306b\u307e\u3068\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p><strong>\u9ad8\u53ef\u7528\u6027:<\/strong> DNS \u5197\u9577\u6027\u306b\u3088\u308a\u3001\u4e00\u90e8\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u969c\u5bb3\u304c\u767a\u751f\u3057\u305f\u308a\u4e2d\u65ad\u304c\u767a\u751f\u3057\u3066\u3082\u3001DNS \u30b5\u30fc\u30d3\u30b9\u306b\u5f15\u304d\u7d9a\u304d\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8ca0\u8377\u5206\u6563:<\/strong> DNS \u30af\u30a8\u30ea\u3092\u8907\u6570\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u5206\u6563\u3059\u308b\u3068\u3001\u500b\u3005\u306e\u30b5\u30fc\u30d0\u30fc\u306e\u904e\u8ca0\u8377\u304c\u9632\u6b62\u3055\u308c\u3001\u5168\u4f53\u7684\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30d5\u30a9\u30fc\u30eb\u30c8\u30c8\u30ec\u30e9\u30f3\u30b9:<\/strong> \u5197\u9577\u30b5\u30fc\u30d0\u30fc\u306f\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u3001\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u307e\u305f\u306f\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306e\u969c\u5bb3\u306b\u3088\u308b\u30b5\u30fc\u30d3\u30b9\u4e2d\u65ad\u306e\u30ea\u30b9\u30af\u3092\u8efd\u6e1b\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u5730\u7406\u7684\u5197\u9577\u6027:<\/strong> DNS \u5197\u9577\u6027\u306e\u5b9f\u88c5\u306e\u4e2d\u306b\u306f\u3001\u8907\u6570\u306e\u5730\u7406\u7684\u306a\u5834\u6240\u306b\u307e\u305f\u304c\u308b\u3082\u306e\u3082\u3042\u308a\u3001\u5730\u57df\u7684\u306a\u505c\u6b62\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u554f\u984c\u306b\u5bfe\u3059\u308b\u8010\u6027\u3092\u5f37\u5316\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u52d5\u7684\u66f4\u65b0:<\/strong> DNS \u5197\u9577\u6027\u306f DNS \u30ec\u30b3\u30fc\u30c9\u306e\u52d5\u7684\u306a\u66f4\u65b0\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3001DNS \u30de\u30c3\u30d4\u30f3\u30b0\u306e\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306e\u5909\u66f4\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>DNS\u5197\u9577\u6027\u306e\u7a2e\u985e<\/h2>\n<p>DNS \u5197\u9577\u6027\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u7a2e\u985e\u304c\u3042\u308a\u3001\u305d\u308c\u305e\u308c\u306b\u72ec\u81ea\u306e\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001DNS \u5197\u9577\u6027\u306e\u4e00\u822c\u7684\u306a\u7a2e\u985e\u306e\u30ea\u30b9\u30c8\u3067\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>DNS\u5197\u9577\u6027\u306e\u30bf\u30a4\u30d7<\/th>\n<th>\u8aac\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u4e00\u756a\u76ee\u306e\u3001\u4e8c\u756a\u76ee\u306e<\/td>\n<td>\u3053\u306e\u8a2d\u5b9a\u3067\u306f\u30011 \u3064\u306e\u30d7\u30e9\u30a4\u30de\u30ea DNS \u30b5\u30fc\u30d0\u30fc\u304c\u30be\u30fc\u30f3 \u30c7\u30fc\u30bf\u306e\u30de\u30b9\u30bf\u30fc \u30b3\u30d4\u30fc\u3092\u4fdd\u6301\u3057\u3001\u8907\u6570\u306e\u30bb\u30ab\u30f3\u30c0\u30ea \u30b5\u30fc\u30d0\u30fc\u304c\u30d7\u30e9\u30a4\u30de\u30ea \u30b5\u30fc\u30d0\u30fc\u3068\u540c\u671f\u3057\u307e\u3059\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u96a0\u3055\u308c\u305f\u30de\u30b9\u30bf\u30fc<\/td>\n<td>\u96a0\u3057\u30de\u30b9\u30bf\u30fc \u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30d1\u30d6\u30ea\u30c3\u30af\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u30d7\u30e9\u30a4\u30de\u30ea DNS \u30b5\u30fc\u30d0\u30fc\u3067\u3042\u308a\u3001\u30d7\u30e9\u30a4\u30de\u30ea \u30b5\u30fc\u30d0\u30fc\u3078\u306e\u76f4\u63a5\u653b\u6483\u306e\u30ea\u30b9\u30af\u3092\u8efd\u6e1b\u3057\u307e\u3059\u3002\u30d1\u30d6\u30ea\u30c3\u30af\u5411\u3051\u306e\u30bb\u30ab\u30f3\u30c0\u30ea \u30b5\u30fc\u30d0\u30fc\u306b\u30c7\u30fc\u30bf\u3092\u8907\u88fd\u3057\u307e\u3059\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u30de\u30b9\u30bf\u30fc\u30de\u30b9\u30bf\u30fc<\/td>\n<td>\u30de\u30b9\u30bf\u30fc-\u30de\u30b9\u30bf\u30fc\u5197\u9577\u6027\u3067\u306f\u8907\u6570\u306e\u30d7\u30e9\u30a4\u30de\u30ea \u30b5\u30fc\u30d0\u30fc\u304c\u63a1\u7528\u3055\u308c\u3001\u5404\u30b5\u30fc\u30d0\u30fc\u306f\u30be\u30fc\u30f3 \u30c7\u30fc\u30bf\u306e\u66f4\u65b0\u3092\u53d7\u3051\u5165\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001DNS \u30ec\u30b3\u30fc\u30c9\u3092\u3088\u308a\u67d4\u8edf\u306b\u7ba1\u7406\u3067\u304d\u307e\u3059\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u30a8\u30cb\u30fc\u30ad\u30e3\u30b9\u30c8<\/td>\n<td>\u30a8\u30cb\u30fc\u30ad\u30e3\u30b9\u30c8\u5197\u9577\u6027\u3067\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u5834\u6240\u306b\u540c\u4e00\u306e DNS \u30b5\u30fc\u30d0\u30fc\u3092\u5c55\u958b\u3057\u307e\u3059\u3002DNS \u30af\u30a8\u30ea\u306f\u6700\u3082\u8fd1\u3044\u5229\u7528\u53ef\u80fd\u306a\u30b5\u30fc\u30d0\u30fc\u306b\u9001\u4fe1\u3055\u308c\u3001\u5fdc\u7b54\u6642\u9593\u304c\u6700\u9069\u5316\u3055\u308c\u3001DDoS \u653b\u6483\u304c\u8efd\u6e1b\u3055\u308c\u307e\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>DNS \u5197\u9577\u6027\u306e\u4f7f\u7528: \u8ab2\u984c\u3068\u89e3\u6c7a\u7b56<\/h2>\n<p>DNS \u5197\u9577\u6027\u306b\u306f\u3055\u307e\u3056\u307e\u306a\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u5b9f\u88c5\u306b\u306f\u8ab2\u984c\u304c\u4f34\u3044\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u8ab2\u984c\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p><strong>\u540c\u671f\u9045\u5ef6:<\/strong> \u30bb\u30ab\u30f3\u30c0\u30ea \u30b5\u30fc\u30d0\u30fc\u3092\u30d7\u30e9\u30a4\u30de\u30ea \u30b5\u30fc\u30d0\u30fc\u3068\u540c\u671f\u3055\u305b\u3066\u304a\u304f\u3068\u3001\u66f4\u65b0\u306e\u4f1d\u64ad\u306b\u9045\u5ef6\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>DNS \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u4e00\u8cab\u6027:<\/strong> \u30af\u30e9\u30a4\u30a2\u30f3\u30c8 \u30c7\u30d0\u30a4\u30b9\u3068\u4e2d\u9593\u30ea\u30be\u30eb\u30d0\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f DNS \u30c7\u30fc\u30bf\u306b\u3088\u308a\u3001DNS \u30ec\u30b3\u30fc\u30c9\u304c\u5909\u66f4\u3055\u308c\u305f\u3068\u304d\u306b\u4e0d\u6574\u5408\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8907\u96d1\u3055\u306e\u5897\u52a0:<\/strong> \u8907\u6570\u306e DNS \u30b5\u30fc\u30d0\u30fc\u3092\u7ba1\u7406\u3059\u308b\u306b\u306f\u3001\u614e\u91cd\u306a\u8a08\u753b\u3068\u7ba1\u7406\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u3053\u308c\u3089\u306e\u8ab2\u984c\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u306e\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3068\u3057\u3066\u306f\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u554f\u984c\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u305f\u3081\u306b DNS \u30ec\u30b3\u30fc\u30c9\u306e TTL (Time-to-Live) \u5024\u3092\u77ed\u304f\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3001DNS \u69cb\u6210\u306e\u7ba1\u7406\u306b\u81ea\u52d5\u5316\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3001DNS \u30b5\u30fc\u30d0\u30fc\u306e\u5065\u5168\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6ce8\u610f\u6df1\u304f\u76e3\u8996\u3059\u308b\u3053\u3068\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u4e3b\u306a\u7279\u5fb4\u3068\u6bd4\u8f03<\/h2>\n<p>\u4ee5\u4e0b\u306b\u3001DNS \u5197\u9577\u6027\u3068\u985e\u4f3c\u306e\u6982\u5ff5\u306e\u6bd4\u8f03\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u30b3\u30f3\u30bb\u30d7\u30c8<\/th>\n<th>\u8aac\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0<\/td>\n<td>\u8ca0\u8377\u5206\u6563\u3067\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u8907\u6570\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u5206\u6563\u3057\u3066\u3001\u30ea\u30bd\u30fc\u30b9\u306e\u4f7f\u7528\u7387\u3092\u6700\u9069\u5316\u3057\u3001\u904e\u8ca0\u8377\u3092\u9632\u6b62\u3057\u307e\u3059\u3002DNS \u5197\u9577\u6027\u306f\u3001\u30af\u30a8\u30ea\u3092\u7570\u306a\u308b\u30b5\u30fc\u30d0\u30fc\u306b\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u3001\u8ca0\u8377\u5206\u6563\u3092\u30b5\u30dd\u30fc\u30c8\u3067\u304d\u307e\u3059\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc<\/td>\n<td>\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u3068\u306f\u3001\u30d7\u30e9\u30a4\u30de\u30ea \u30b7\u30b9\u30c6\u30e0\u306b\u969c\u5bb3\u304c\u767a\u751f\u3057\u305f\u3068\u304d\u306b\u5197\u9577\u30b7\u30b9\u30c6\u30e0\u306b\u5207\u308a\u66ff\u3048\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002DNS \u5197\u9577\u6027\u306b\u3088\u308a\u3001\u30d7\u30e9\u30a4\u30de\u30ea \u30b5\u30fc\u30d0\u30fc\u304c\u4f7f\u7528\u3067\u304d\u306a\u304f\u306a\u3063\u305f\u5834\u5408\u306b\u4ee3\u66ff DNS \u30b5\u30fc\u30d0\u30fc\u304c\u8981\u6c42\u3092\u51e6\u7406\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u3092\u5bb9\u6613\u306b\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u9ad8\u53ef\u7528\u6027<\/td>\n<td>\u9ad8\u53ef\u7528\u6027\u306f\u3001\u7d99\u7d9a\u7684\u306a\u30b5\u30fc\u30d3\u30b9\u7a3c\u50cd\u6642\u9593\u306e\u7dad\u6301\u306b\u91cd\u70b9\u3092\u7f6e\u3044\u3066\u3044\u307e\u3059\u3002DNS \u5197\u9577\u6027\u306f\u3001\u5197\u9577\u30b5\u30fc\u30d0\u30fc\u306b DNS \u30b5\u30fc\u30d3\u30b9\u3092\u5206\u6563\u3057\u3001\u5358\u4e00\u969c\u5bb3\u70b9\u3092\u9632\u3050\u3053\u3068\u3067\u9ad8\u53ef\u7528\u6027\u306b\u8ca2\u732e\u3057\u307e\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u5c55\u671b\u3068\u5c06\u6765\u306e\u30c6\u30af\u30ce\u30ed\u30b8\u30fc<\/h2>\n<p>\u4eca\u5f8c\u3001DNS \u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u306e\u9032\u6b69\u306b\u3088\u308a\u3001DNS \u306e\u5197\u9577\u6027\u304c\u3055\u3089\u306b\u5f37\u5316\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u4eca\u5f8c\u306e\u958b\u767a\u306e\u53ef\u80fd\u6027\u3068\u3057\u3066\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p><strong>DNS over HTTPS (DoH) \u304a\u3088\u3073 DNS over TLS (DoT):<\/strong> \u6697\u53f7\u5316\u3055\u308c\u305f DNS \u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001DNS \u901a\u4fe1\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3092\u5411\u4e0a\u3055\u305b\u3001\u3053\u308c\u3089\u306e\u5b89\u5168\u306a\u30c1\u30e3\u30cd\u30eb\u3092\u4ecb\u3057\u305f DNS \u5197\u9577\u6027\u3092\u3088\u308a\u5805\u7262\u306b\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>IPv6 \u306e\u63a1\u7528:<\/strong> \u4e16\u754c\u304c IPv6 \u306b\u79fb\u884c\u3059\u308b\u306b\u3064\u308c\u3066\u3001DNS \u5197\u9577\u6027\u306f IPv6 \u30ec\u30b3\u30fc\u30c9\u3068\u30a2\u30c9\u30ec\u30b9\u89e3\u6c7a\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u5fc5\u8981\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> \u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3 \u30d9\u30fc\u30b9\u306e DNS \u30b7\u30b9\u30c6\u30e0\u306e\u5b9f\u9a13\u306b\u3088\u308a\u3001\u5206\u6563\u5316\u3055\u308c\u305f\u3001\u5197\u9577\u6027\u306e\u9ad8\u3044 DNS \u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u304c\u5b9f\u73fe\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>DNS \u5197\u9577\u6027\u3068\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc<\/h2>\n<p>\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3001\u533f\u540d\u6027\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u3092 DNS \u5197\u9577\u6027\u3068\u4f75\u7528\u3059\u308b\u3068\u3001\u4fe1\u983c\u6027\u3068\u30d5\u30a9\u30fc\u30eb\u30c8 \u30c8\u30ec\u30e9\u30f3\u30b9\u3092\u3055\u3089\u306b\u5f37\u5316\u3067\u304d\u307e\u3059\u3002DNS \u30af\u30a8\u30ea\u3092\u8907\u6570\u306e\u5197\u9577 DNS \u30b5\u30fc\u30d0\u30fc\u306b\u8ee2\u9001\u3057\u3066\u304b\u3089\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306b\u5230\u9054\u3059\u308b\u3068\u3001DNS \u95a2\u9023\u306e\u6f5c\u5728\u7684\u306a\u554f\u984c\u304c\u6700\u5c0f\u9650\u306b\u6291\u3048\u3089\u308c\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f\u3001\u8ca0\u8377\u5206\u6563\u3084\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u306a\u3069\u306e\u72ec\u81ea\u306e\u5197\u9577\u6027\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u5b9f\u88c5\u3057\u3066\u3001\u30b9\u30e0\u30fc\u30ba\u306a\u64cd\u4f5c\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u95a2\u9023\u30ea\u30f3\u30af<\/h2>\n<p>DNS \u5197\u9577\u6027\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<ul>\n<li><a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/glossary\/dns-redundancy\/\" target=\"_new\" rel=\"noopener nofollow\">DNS \u5197\u9577\u6027\u306e\u6982\u8981<\/a><\/li>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc1035\" target=\"_new\" rel=\"noopener nofollow\">RFC 1035 \u2013 \u30c9\u30e1\u30a4\u30f3\u540d \u2013 \u5b9f\u88c5\u3068\u4ed5\u69d8<\/a><\/li>\n<li><a href=\"https:\/\/www.apnic.net\/community\/security\/dnssec\/dns-resilience-and-redundancy\/\" target=\"_new\" rel=\"noopener nofollow\">DNS \u306e\u56de\u5fa9\u529b\u3068\u5197\u9577\u6027<\/a><\/li>\n<\/ul>\n<p>\u7d50\u8ad6\u3068\u3057\u3066\u3001DNS \u5197\u9577\u6027\u306f\u3001\u4fe1\u983c\u6027\u3001\u30d5\u30a9\u30fc\u30eb\u30c8 \u30c8\u30ec\u30e9\u30f3\u30b9\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u5411\u4e0a\u3092\u5b9f\u73fe\u3059\u308b\u3001\u73fe\u4ee3\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306e\u91cd\u8981\u306a\u5074\u9762\u3067\u3059\u3002DNS \u5197\u9577\u6027\u306e\u6b74\u53f2\u3001\u52d5\u4f5c\u539f\u7406\u3001\u7a2e\u985e\u3001\u304a\u3088\u3073\u5c06\u6765\u306e\u958b\u767a\u306e\u53ef\u80fd\u6027\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001OneProxy \u306f\u30e6\u30fc\u30b6\u30fc\u306b\u5805\u7262\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30b5\u30fc\u30d3\u30b9\u3092\u4fdd\u8a3c\u3057\u3001\u30e6\u30fc\u30b6\u30fc \u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u3068\u6e80\u8db3\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>","protected":false},"featured_media":476928,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476927","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>DNS Redundancy: Ensuring Resilience and Reliability<\/mark>","faq_items":[{"question":"What is DNS redundancy?","answer":"<p>DNS redundancy is a crucial aspect of internet infrastructure that involves deploying multiple redundant DNS servers. It ensures high availability and fault tolerance by distributing domain name resolution queries across these servers. This redundancy prevents service disruptions and improves overall performance.<\/p>"},{"question":"How did DNS redundancy originate?","answer":"<p>The concept of DNS redundancy emerged alongside the development of the Domain Name System (DNS) in the 1980s. It was first mentioned in RFC 882 in November 1983, highlighting the need for a distributed DNS system to mitigate single points of failure.<\/p>"},{"question":"How does DNS redundancy work?","answer":"<p>DNS redundancy works by setting up primary and secondary DNS servers. The primary server holds the master copy of the DNS zone data, while secondary servers regularly synchronize with it to stay up-to-date. When a DNS query is received, any of the redundant servers can respond, distributing the load and providing fault tolerance.<\/p>"},{"question":"What are the key features of DNS redundancy?","answer":"<p>The key features of DNS redundancy include high availability, load distribution, fault tolerance, geo-redundancy, and support for dynamic updates. These features ensure a stable and resilient DNS service.<\/p>"},{"question":"What types of DNS redundancy exist?","answer":"<p>There are several types of DNS redundancy, including:<\/p><ul><li>Primary-Secondary: One primary server with multiple secondary servers syncing with it.<\/li><li>Hidden Master: A non-public primary server replicating data to public-facing secondary servers.<\/li><li>Master-Master: Multiple primary servers with the ability to accept updates.<\/li><li>Anycast: Deploying identical DNS servers in different locations, directing queries to the nearest available server.<\/li><\/ul>"},{"question":"How is DNS redundancy used, and what challenges does it face?","answer":"<p>DNS redundancy is used to ensure continuous service availability. However, challenges such as synchronization delays and DNS cache consistency may arise. To address these, shorter TTL values and automation tools can be employed.<\/p>"},{"question":"How does DNS redundancy compare to load balancing and failover?","answer":"<p>DNS redundancy complements load balancing and failover mechanisms. While load balancing distributes network traffic across servers, DNS redundancy ensures redundancy in DNS resolution. Failover switches to redundant systems when the primary fails, and DNS redundancy supports this by providing alternate servers to handle queries.<\/p>"},{"question":"What are the future technologies related to DNS redundancy?","answer":"<p>Future technologies may include DNS over HTTPS (DoH) and DNS over TLS (DoT) for encrypted DNS communications, IPv6 support, and exploration of blockchain-based DNS systems for decentralized redundancy.<\/p>"},{"question":"How can proxy servers benefit from DNS redundancy?","answer":"<p>Proxy servers can enhance their reliability and performance by leveraging DNS redundancy. Integrating redundant DNS servers before reaching the proxy ensures minimized DNS-related issues, while proxy servers themselves can implement load balancing and failover mechanisms for added reliability.<\/p>"},{"question":"Where can I find more information about DNS redundancy?","answer":"<p>For more in-depth information about DNS redundancy, you can explore the following resources:<\/p><ul><li><a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/glossary\/dns-redundancy\/\" target=\"_new\">Introduction to DNS Redundancy<\/a><\/li><li><a href=\"https:\/\/tools.ietf.org\/html\/rfc1035\" target=\"_new\">RFC 1035 - Domain Names - Implementation and Specification<\/a><\/li><li><a href=\"https:\/\/www.apnic.net\/community\/security\/dnssec\/dns-resilience-and-redundancy\/\" target=\"_new\">DNS Resilience and Redundancy<\/a><\/li><\/ul>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/476927","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\/476927\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media\/476928"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media?parent=476927"}],"curies":[{"name":"\u3046\u30fc\u3093","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}