{"id":476204,"date":"2023-08-09T07:26:52","date_gmt":"2023-08-09T07:26:52","guid":{"rendered":""},"modified":"2023-09-05T11:12:15","modified_gmt":"2023-09-05T11:12:15","slug":"cgnat","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/jp\/wiki\/cgnat\/","title":{"rendered":"CGNAT"},"content":{"rendered":"<p>\u30ad\u30e3\u30ea\u30a2\u30b0\u30ec\u30fc\u30c9 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a2\u30c9\u30ec\u30b9\u5909\u63db (CGNAT \u3068\u7565\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044) \u306f\u3001IP \u30a2\u30c9\u30ec\u30b9\u7ba1\u7406\u306e\u5206\u91ce\u306b\u304a\u3051\u308b\u6975\u3081\u3066\u91cd\u8981\u306a\u30a4\u30ce\u30d9\u30fc\u30b7\u30e7\u30f3\u3067\u3059\u3002\u3053\u308c\u306f\u3001IPv4 \u30a2\u30c9\u30ec\u30b9\u67af\u6e07\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u7279\u5225\u306b\u8a2d\u8a08\u3055\u308c\u305f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u6280\u8853\u30bf\u30b9\u30af \u30d5\u30a9\u30fc\u30b9 (IETF) \u6a19\u6e96\u3067\u3059\u3002<\/p>\n<h2>CGNAT\u306e\u8d77\u6e90\u3068\u9032\u5316\u306e\u8ffd\u8de1<\/h2>\n<p>CGNAT \u306e\u59cb\u307e\u308a\u306f 21 \u4e16\u7d00\u521d\u982d\u306b\u9061\u308a\u307e\u3059\u3002\u5f53\u521d\u306f 2011 \u5e74\u306b IETF \u306b\u3088\u3063\u3066 RFC 6264 \u3067\u63d0\u6848\u3055\u308c\u3001\u305d\u306e\u5f8c 2012 \u5e74\u306b RFC 6888 \u3067\u6a19\u6e96\u5316\u3055\u308c\u307e\u3057\u305f\u3002\u305d\u306e\u8a95\u751f\u306e\u4e3b\u305f\u308b\u8981\u56e0\u306f\u3001IPv4 \u30a2\u30c9\u30ec\u30b9\u306e\u67af\u6e07\u3068 IPv6 \u306e\u63a1\u7528\u306e\u9045\u308c\u3067\u3057\u305f\u3002<\/p>\n<p>32 \u30d3\u30c3\u30c8 \u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u7528\u3059\u308b IPv4 \u306b\u306f\u3001\u6700\u5927\u3067\u7d04 43 \u5104\u306e\u56fa\u6709\u30a2\u30c9\u30ec\u30b9\u306e\u5236\u9650\u304c\u3042\u308a\u307e\u3059\u3002\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u63a5\u7d9a\u3055\u308c\u308b\u30c7\u30d0\u30a4\u30b9\u306e\u6570\u304c\u3053\u306e\u5236\u9650\u3092\u8d85\u3048\u59cb\u3081\u305f\u305f\u3081\u3001\u8907\u6570\u306e\u30c7\u30d0\u30a4\u30b9\u304c 1 \u3064\u306e\u30d1\u30d6\u30ea\u30c3\u30af IPv4 \u30a2\u30c9\u30ec\u30b9\u3092\u5171\u6709\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b CGNAT \u304c\u5b9f\u7528\u7684\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3068\u3057\u3066\u767b\u5834\u3057\u307e\u3057\u305f\u3002<\/p>\n<h2>CGNAT\u306e\u6982\u5ff5\u3092\u89e3\u660e\u3059\u308b<\/h2>\n<p>CGNAT \u306f\u3001\u8907\u6570\u306e\u30c7\u30d0\u30a4\u30b9\u304c\u5358\u4e00\u306e\u30d1\u30d6\u30ea\u30c3\u30af IPv4 \u30a2\u30c9\u30ec\u30b9\u3092\u5171\u6709\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u3001IPv4 \u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u306e\u5bff\u547d\u3092\u5ef6\u3070\u3059\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u6280\u8853\u3067\u3059\u3002\u3053\u308c\u306f\u3001IP \u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3092\u5225\u306e IP \u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u306b\u518d\u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u3067\u3042\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a2\u30c9\u30ec\u30b9\u5909\u63db (NAT) \u306e\u4e00\u7a2e\u3067\u3059\u3002<\/p>\n<p>\u5f93\u6765\u306e NAT \u74b0\u5883\u3067\u306f\u3001\u30ed\u30fc\u30ab\u30eb \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30c7\u30d0\u30a4\u30b9\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3068\u306e\u901a\u4fe1\u306b\u30d1\u30d6\u30ea\u30c3\u30af IP \u30a2\u30c9\u30ec\u30b9\u3092\u5171\u6709\u3057\u307e\u3059\u3002CGNAT \u306f\u3053\u308c\u3092\u3055\u3089\u306b\u4e00\u6b69\u9032\u3081\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30b5\u30fc\u30d3\u30b9 \u30d7\u30ed\u30d0\u30a4\u30c0\u30fc (ISP) \u30ec\u30d9\u30eb\u3067 NAT \u306e 2 \u756a\u76ee\u306e\u30ec\u30a4\u30e4\u30fc\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u305d\u308c\u305e\u308c\u30ed\u30fc\u30ab\u30eb NAT \u3092\u6301\u3064\u8907\u6570\u306e\u9867\u5ba2\u304c\u30011 \u3064\u306e\u30d1\u30d6\u30ea\u30c3\u30af IP \u30a2\u30c9\u30ec\u30b9\u3092\u5171\u6709\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>CGNAT\u306e\u6a5f\u80fd\u306e\u63a2\u7a76<\/h2>\n<p>CGNAT \u306f\u3001\u672c\u8cea\u7684\u306b\u306f\u5f93\u6765\u306e NAT \u3068\u540c\u3058\u539f\u7406\u3067\u52d5\u4f5c\u3057\u307e\u3059\u304c\u3001\u5909\u63db\u30ec\u30d9\u30eb\u304c\u8ffd\u52a0\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30c7\u30fc\u30bf \u30d1\u30b1\u30c3\u30c8\u304c\u30ed\u30fc\u30ab\u30eb \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304b\u3089\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u79fb\u52d5\u3059\u308b\u3068\u3001\u30ed\u30fc\u30ab\u30eb NAT \u3092\u901a\u904e\u3057\u3001\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8 IP \u30a2\u30c9\u30ec\u30b9\u304c\u30d1\u30d6\u30ea\u30c3\u30af IP \u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u3053\u308c\u3089\u306e\u30d1\u30b1\u30c3\u30c8\u306f ISP \u306e CGNAT \u306b\u5230\u9054\u3057\u3001\u3053\u3053\u3067\u518d\u3073\u30d1\u30d6\u30ea\u30c3\u30af IP \u30a2\u30c9\u30ec\u30b9\u304c\u5909\u66f4\u3055\u308c\u307e\u3059\u3002\u53d7\u4fe1\u30c7\u30fc\u30bf \u30d1\u30b1\u30c3\u30c8\u306e\u5834\u5408\u306f\u3001\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u9006\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>CGNAT \u30b7\u30b9\u30c6\u30e0\u306e\u4e3b\u8981\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ol>\n<li>\u5909\u63db\u3092\u5b9f\u884c\u3059\u308b CGNAT \u30c7\u30d0\u30a4\u30b9\u81ea\u4f53\u3002<\/li>\n<li>CGNAT \u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u30d1\u30d6\u30ea\u30c3\u30af IP \u30a2\u30c9\u30ec\u30b9\u306e\u30d7\u30fc\u30eb\u3002<\/li>\n<li>\u5185\u90e8\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8 IP \u30a2\u30c9\u30ec\u30b9\u3068\u5916\u90e8\u30d1\u30d6\u30ea\u30c3\u30af IP \u30a2\u30c9\u30ec\u30b9\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u3002<\/li>\n<\/ol>\n<h2>CGNAT\u306e\u4e3b\u306a\u7279\u5fb4<\/h2>\n<p>CGNAT \u306b\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u6ce8\u76ee\u3059\u3079\u304d\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>\u4f4f\u6240\u306e\u4fdd\u5b58<\/strong>: CGNAT \u306f\u3001\u8907\u6570\u306e\u30c7\u30d0\u30a4\u30b9\u304c\u5358\u4e00\u306e\u30d1\u30d6\u30ea\u30c3\u30af IP \u30a2\u30c9\u30ec\u30b9\u3092\u5171\u6709\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u3001IPv4 \u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u306e\u5bff\u547d\u3092\u5ef6\u3070\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u900f\u660e\u6027<\/strong>: \u5927\u591a\u6570\u306e\u30e6\u30fc\u30b6\u30fc\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3068\u3063\u3066\u3001CGNAT \u306e\u5b58\u5728\u306f\u5b8c\u5168\u306b\u900f\u904e\u7684\u3067\u3059\u3002<\/li>\n<li><strong>\u4e92\u63db\u6027<\/strong>CGNAT \u306f IPv4 \u30a2\u30c9\u30ec\u30b9\u3068 IPv6 \u30a2\u30c9\u30ec\u30b9\u306e\u4e21\u65b9\u3067\u52d5\u4f5c\u3059\u308b\u305f\u3081\u3001\u3042\u3089\u3086\u308b\u30bf\u30a4\u30d7\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068\u4e92\u63db\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3<\/strong>CGNAT \u306f\u5927\u91cf\u306e IP \u30a2\u30c9\u30ec\u30b9\u5909\u63db\u3092\u51e6\u7406\u3067\u304d\u308b\u305f\u3081\u3001\u5927\u898f\u6a21\u306a ISP \u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n<h2>CGNAT\u306e\u30ab\u30c6\u30b4\u30ea\u30fc<\/h2>\n<p>\u6a5f\u80fd\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u7bc4\u56f2\u306b\u57fa\u3065\u3044\u3066\u3001CGNAT \u306f\u5927\u304d\u304f 2 \u3064\u306e\u30ab\u30c6\u30b4\u30ea\u306b\u5206\u985e\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>\u57fa\u672c\u7684\u306aCGNAT<\/strong>: \u30d1\u30d6\u30ea\u30c3\u30af IP \u30a2\u30c9\u30ec\u30b9\u304b\u3089\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8 IP \u30a2\u30c9\u30ec\u30b9\u3078\u306e\u5358\u7d14\u306a 1 \u5bfe 1 \u5909\u63db\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u4e0a\u7d1aCGNAT<\/strong>: 1\u5bfe1\u306e\u7ffb\u8a33\u306b\u52a0\u3048\u3066\u3001\u30dd\u30fc\u30c8\u30d6\u30ed\u30c3\u30af\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u5236\u9650\u3001\u30ed\u30b0\u8a18\u9332\u306a\u3069\u306e\u9ad8\u5ea6\u306a\u6a5f\u80fd\u3082\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n<h2>CGNAT \u306e\u5229\u7528\u3001\u554f\u984c\u3001\u89e3\u6c7a\u7b56<\/h2>\n<p>CGNAT \u306f\u4e3b\u306b ISP \u306b\u3088\u3063\u3066 IPv4 \u30a2\u30c9\u30ec\u30b9\u306e\u4e0d\u8db3\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306b\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u5927\u898f\u6a21\u306a\u7d44\u7e54\u3067\u306f\u30d1\u30d6\u30ea\u30c3\u30af IP \u30a2\u30c9\u30ec\u30b9\u306e\u4f7f\u7528\u3092\u7d71\u5408\u3059\u308b\u305f\u3081\u306b\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>CGNAT \u306b\u306f\u5229\u70b9\u304c\u3042\u308b\u4e00\u65b9\u3067\u3001\u3044\u304f\u3064\u304b\u306e\u8ab2\u984c\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u7279\u5b9a\u306e\u30d4\u30a2\u30c4\u30fc\u30d4\u30a2 (P2P) \u30b5\u30fc\u30d3\u30b9\u3084\u30aa\u30f3\u30e9\u30a4\u30f3 \u30b2\u30fc\u30e0 \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u52d5\u4f5c\u3092\u59a8\u3052\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li>\u5730\u7406\u7684\u4f4d\u7f6e\u3068 IP \u30d9\u30fc\u30b9\u306e\u8b58\u5225\u304c\u8907\u96d1\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li>\u30dd\u30fc\u30c8\u8ee2\u9001\u3092\u5fc5\u8981\u3068\u3059\u308b\u30b5\u30fc\u30d3\u30b9\u306b\u5f71\u97ff\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u306e\u554f\u984c\u306e\u89e3\u6c7a\u7b56\u3068\u3057\u3066\u306f\u3001\u9ad8\u5ea6\u306a CGNAT \u6a5f\u80fd\u306e\u4f7f\u7528\u3084\u3001IPv6 \u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4 (ALG) \u306a\u3069\u306e\u4ee3\u66ff\u30c6\u30af\u30ce\u30ed\u30b8\u306e\u4f7f\u7528\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n<h2>CGNAT\u3068\u985e\u4f3c\u6982\u5ff5\u306e\u6bd4\u8f03\u6982\u8981<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u30b3\u30f3\u30bb\u30d7\u30c8<\/th>\n<th>\u7c21\u5358\u306a\u8aac\u660e<\/th>\n<th>\u4e3b\u306a\u5229\u70b9<\/th>\n<th>\u4e3b\u306a\u5236\u9650<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>CGNAT<\/td>\n<td>\u4e3b\u306b IPv4 \u30a2\u30c9\u30ec\u30b9\u306e\u7bc0\u7d04\u3092\u76ee\u7684\u3068\u3057\u305f NAT \u306e\u8907\u6570\u30ec\u30a4\u30e4\u30fc<\/td>\n<td>IPv4\u30a2\u30c9\u30ec\u30b9\u306e\u4f7f\u7528\u3092\u6700\u5927\u5316<\/td>\n<td>\u7279\u5b9a\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b<\/td>\n<\/tr>\n<tr>\n<td>\u6a19\u6e96NAT<\/td>\n<td>\u30ed\u30fc\u30ab\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u4f7f\u7528\u3055\u308c\u308b NAT \u306e 1 \u3064\u306e\u30ec\u30a4\u30e4\u30fc<\/td>\n<td>\u5185\u90e8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7ba1\u7406\u3092\u7c21\u7d20\u5316<\/td>\n<td>IPv4\u30a2\u30c9\u30ec\u30b9\u67af\u6e07\u306f\u89e3\u6c7a\u3055\u308c\u306a\u3044<\/td>\n<\/tr>\n<tr>\n<td>IPv6<\/td>\n<td>\u3088\u308a\u5e83\u3044\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3092\u6301\u3064\u65b0\u3057\u3044IP\u30a2\u30c9\u30ec\u30b9\u6a19\u6e96<\/td>\n<td>IPv4\u30a2\u30c9\u30ec\u30b9\u67af\u6e07\u3092\u89e3\u6c7a<\/td>\n<td>\u5c0e\u5165\u30d7\u30ed\u30bb\u30b9\u304c\u9045\u304f\u8907\u96d1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>CGNAT\u306b\u95a2\u9023\u3059\u308b\u5c06\u6765\u306e\u5c55\u671b\u3068\u6280\u8853<\/h2>\n<p>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304c\u9032\u5316\u3059\u308b\u306b\u3064\u308c\u3001CGNAT \u3082\u9032\u5316\u3057\u307e\u3059\u3002CGNAT \u306e\u5c06\u6765\u306f\u3001\u6700\u7d42\u7684\u306b\u306f IPv6 \u3078\u306e\u79fb\u884c\u3068\u7d61\u307f\u5408\u3063\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u3002CGNAT \u306f IPv4 \u67af\u6e07\u306b\u5bfe\u3059\u308b\u89e3\u6c7a\u7b56\u3092\u63d0\u4f9b\u3057\u307e\u3059\u304c\u3001\u305d\u308c\u306f\u4e00\u6642\u7684\u306a\u3082\u306e\u3067\u3059\u3002IPv6 \u304c\u3088\u308a\u5e83\u304f\u63a1\u7528\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308b\u3068\u3001CGNAT \u3078\u306e\u4f9d\u5b58\u306f\u6e1b\u5c11\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e00\u65b9\u3001CGNAT \u306e\u9ad8\u5ea6\u306a\u5f62\u5f0f\u306f\u3001\u95a2\u9023\u3059\u308b\u8ab2\u984c\u3092\u3088\u308a\u9069\u5207\u306b\u51e6\u7406\u3059\u308b\u305f\u3081\u306b\u7d99\u7d9a\u7684\u306b\u958b\u767a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u306f\u3001\u30ed\u30b0\u306e\u6539\u5584\u3001P2P \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u3088\u308a\u9069\u5207\u306a\u51e6\u7406\u3001\u9ad8\u5ea6\u306a\u30bb\u30c3\u30b7\u30e7\u30f3\u7ba1\u7406\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n<h2>\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3068CGNAT<\/h2>\n<p>\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u3068 CGNAT \u306b\u306f\u5171\u901a\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u3069\u3061\u3089\u3082\u30011 \u3064\u306e IP \u30a2\u30c9\u30ec\u30b9\u304c\u8907\u6570\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u8868\u3059\u3068\u3044\u3046\u6982\u5ff5\u3067\u3059\u3002\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f\u533f\u540d\u6027\u3092\u63d0\u4f9b\u3057\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u5236\u9650\u3092\u56de\u907f\u3067\u304d\u307e\u3059\u304c\u3001IPv4 \u30a2\u30c9\u30ec\u30b9\u67af\u6e07\u306e\u554f\u984c\u306f\u89e3\u6c7a\u3057\u307e\u305b\u3093\u3002\u305d\u3053\u3067 CGNAT \u304c\u5f79\u7acb\u3061\u307e\u3059\u3002\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u3068 CGNAT \u306e\u76f8\u4e92\u4f5c\u7528\u306f\u3001\u7279\u5b9a\u306e\u8a2d\u5b9a\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u304c\u3001\u4e00\u822c\u7684\u306b\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u74b0\u5883\u3067\u30b7\u30fc\u30e0\u30ec\u30b9\u306b\u9023\u643a\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/p>\n<h2>\u95a2\u9023\u30ea\u30f3\u30af<\/h2>\n<ol>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc6888\" target=\"_new\" rel=\"noopener nofollow\">RFC 6888 \u2013 IETF<\/a><\/li>\n<li><a href=\"https:\/\/blogs.cisco.com\/sp\/cgn-the-dos-and-donts\" target=\"_new\" rel=\"noopener nofollow\">CGNAT: IPv4 \u67af\u6e07\u306b\u5bfe\u3059\u308b\u77ed\u671f\u7684\u306a\u89e3\u6c7a\u7b56 \u2013 Cisco \u30d6\u30ed\u30b0<\/a><\/li>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc8200\" target=\"_new\" rel=\"noopener nofollow\">IPv6 \u2013 IETF<\/a><\/li>\n<li><a href=\"https:\/\/www.juniper.net\/documentation\/en_US\/junos\/topics\/concept\/nat-overview.html\" target=\"_new\" rel=\"noopener nofollow\">\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a2\u30c9\u30ec\u30b9\u5909\u63db\u306e\u7406\u89e3 \u2013 Juniper Networks<\/a><\/li>\n<\/ol>\n<p>\u3053\u306e\u8a18\u4e8b\u306e\u60c5\u5831\u306f\u3001CGNAT \u306e\u8d77\u6e90\u3001\u7528\u9014\u3001\u5236\u9650\u3001\u304a\u3088\u3073\u5c06\u6765\u306e\u53ef\u80fd\u6027\u306b\u3064\u3044\u3066\u5305\u62ec\u7684\u306b\u7406\u89e3\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u307e\u305f\u3001OneProxy \u304c\u63d0\u4f9b\u3059\u308b\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306a\u3069\u306e\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u304c CGNAT \u3068\u3069\u306e\u3088\u3046\u306b\u3084\u308a\u53d6\u308a\u3059\u308b\u304b\u306b\u3064\u3044\u3066\u3082\u8aac\u660e\u3057\u3001\u3053\u308c\u3089\u306e\u76f8\u4e92\u63a5\u7d9a\u3055\u308c\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u306b\u95a2\u3059\u308b\u7dcf\u5408\u7684\u306a\u8996\u70b9\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>","protected":false},"featured_media":476205,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476204","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Carrier-Grade Network Address Translation (CGNAT): An In-depth Look<\/mark>","faq_items":[{"question":"What is Carrier-Grade Network Address Translation (CGNAT)?","answer":"<p>CGNAT is an Internet Engineering Task Force (IETF) standard specifically designed to mitigate the problem of IPv4 address exhaustion. It allows multiple devices to share a single public IPv4 address, effectively extending the lifespan of the IPv4 address space.<\/p>"},{"question":"When was CGNAT first introduced?","answer":"<p>CGNAT was initially proposed by the IETF in 2011 and later standardized in 2012. Its introduction was driven by the rapidly depleting pool of IPv4 addresses and the slow adoption of IPv6.<\/p>"},{"question":"How does CGNAT work?","answer":"<p>CGNAT operates much like a traditional NAT, but with an extra layer of translation. When data packets move from a local network to the Internet, they pass through the local NAT, which converts the private IP address to a public one. These packets then reach the CGNAT at the ISP, which once again changes the public IP address. The process is reversed for inbound data packets.<\/p>"},{"question":"What are some key features of CGNAT?","answer":"<p>Key features of CGNAT include address conservation (allowing many devices to share a single public IP address), transparency (being unnoticeable to most users and applications), compatibility (working with both IPv4 and IPv6 addresses), and scalability (handling a large number of IP address translations).<\/p>"},{"question":"What types of CGNAT exist?","answer":"<p>There are two broad categories of CGNAT: Basic CGNAT, which performs simple one-to-one translation of public IP addresses to private ones, and Advanced CGNAT, which supports additional features like port blocking, session limiting, and logging.<\/p>"},{"question":"What are some issues with CGNAT and how can they be solved?","answer":"<p>CGNAT can pose problems for certain peer-to-peer (P2P) services and online gaming applications, complicate geo-location and IP-based identification, and impact services that require port forwarding. These issues can be tackled by using advanced CGNAT features or alternative technologies like IPv6 or Application Layer Gateways (ALGs).<\/p>"},{"question":"What is the future of CGNAT?","answer":"<p>The future of CGNAT is likely intertwined with the adoption of IPv6. While CGNAT provides a temporary solution to IPv4 exhaustion, as IPv6 becomes more universally adopted, the reliance on CGNAT may diminish. However, advanced forms of CGNAT continue to evolve to better handle the associated challenges.<\/p>"},{"question":"How do proxy servers interact with CGNAT?","answer":"<p>Proxy servers and CGNAT share a common thread in that they both involve the concept of one IP address representing multiple devices. While proxy servers can provide anonymity and bypass content restrictions, they don't solve the issue of IPv4 address exhaustion. Generally, proxy servers and CGNAT can function together seamlessly in a network environment.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/476204","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\/476204\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media\/476205"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media?parent=476204"}],"curies":[{"name":"\u3046\u30fc\u3093","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}