{"id":18674,"date":"2023-11-30T16:26:13","date_gmt":"2023-11-30T16:26:13","guid":{"rendered":"https:\/\/www.rapidseedbox.com\/?p=18674"},"modified":"2025-11-17T13:50:56","modified_gmt":"2025-11-17T13:50:56","slug":"why-is-nat-not-needed-in-ipv6","status":"publish","type":"post","link":"https:\/\/www.rapidseedbox.com\/ja\/blog\/why-is-nat-not-needed-in-ipv6","title":{"rendered":"\u306a\u305cIPv6\u3067\u306fNAT\u304c\u4e0d\u8981\u306a\u306e\u304b\uff1f"},"content":{"rendered":"<figure class=\"wp-block-audio\"><audio controls src=\"https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/Sally-Reads-Why-NAT-is-not-needed-in-IPv6-1.mp3\"><\/audio><figcaption class=\"wp-element-caption\"><strong><em>\u97f3\u58f0\u7248\uff08\u203b\u82f1\u8a9e\u3067\u3059\u3002\u518d\u751f\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u3066\u8a18\u4e8b\u3092\u30b7\u30fc\u30e0\u30ec\u30b9\u306b\u30b9\u30af\u30ed\u30fc\u30eb \u25b6\ufe0f\ud83c\udfb6\uff09<\/em><\/strong><\/figcaption><\/figure>\n\n\n\n<p><strong>\u306a\u305cIPv6\u3067\u306fNAT\u304c\u4e0d\u8981\u306a\u306e\u304b\uff1f <\/strong><em>\u306a\u305cIPv6\u3067\u306fNAT\u304c\u4e0d\u8981\u306a\u306e\u3067\u3059\u304b\uff1fIPv6\u306b\u306f\u5e83\u5927\u306a\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u304c\u3042\u308b\u305f\u3081\u3001IPv6\u30a2\u30c9\u30ec\u30b9\u306bNAT\u306f\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u6a5f\u5668\u9593\u306e\u76f4\u63a5\u901a\u4fe1\u304c\u53ef\u80fd\u306b\u306a\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u7c21\u7d20\u5316\u3055\u308c\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/em><\/p>\n\n\n\n<p><strong>\u3082\u3063\u3068\u8a73\u3057\u304f\u77e5\u308a\u305f\u3044\u3067\u3059\u304b\uff1f <\/strong><\/p>\n\n\n\n<p>\u7d9a\u304d\u3092\u8aad\u3080&nbsp;<\/p>\n\n\n\n<p><em>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001IPv4\u306e\u6587\u8108\u306b\u304a\u3051\u308bNAT\u3001NAT\u306e\u4ed5\u7d44\u307f\u3001\u305d\u3057\u3066NAT\u306e\u5fc5\u8981\u6027\u3092\u306a\u304f\u3059\u305f\u3081\u306bIPv6\u304c\u884c\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001IPv6\u3092\u5fc5\u8981\u3068\u3057\u306a\u304c\u3089\u3082NAT\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u5834\u5408\u306e\u89e3\u6c7a\u7b56\u3082\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002&nbsp;<\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/Why-is-NAT-not-needed-in-IPv6.png\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"531\" src=\"https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/Why-is-NAT-not-needed-in-IPv6-1024x531.png\" alt=\"IPv6\u3067NAT\u304c\u4e0d\u8981\u306a\u7406\u7531\" class=\"wp-image-25714\" srcset=\"https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/Why-is-NAT-not-needed-in-IPv6-1024x531.png 1024w, https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/Why-is-NAT-not-needed-in-IPv6-300x155.png 300w, https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/Why-is-NAT-not-needed-in-IPv6-1536x796.png 1536w, https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/Why-is-NAT-not-needed-in-IPv6-18x9.png 18w, https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/Why-is-NAT-not-needed-in-IPv6.png 1748w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u76ee\u6b21<\/h2>\n\n\n\n<ol>\n<li><a href=\"#01\">IPv4\u306e\u6587\u8108\u3067NAT\u3092\u7406\u89e3\u3057\u3088\u3046<\/a><\/li>\n\n\n\n<li><a href=\"#02\">\u306a\u305cIPv6\u3067\u306fNAT\u304c\u4e0d\u8981\u306a\u306e\u304b\uff1f<\/a>\n<ul>\n<li>\u5e83\u5927\u306a\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593<\/li>\n\n\n\n<li>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5f37\u5316<\/li>\n\n\n\n<li>\u30b7\u30f3\u30d7\u30eb\u306a\u63a5\u7d9a\u6027\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><a href=\"#03\">IPv6\u306b\u304a\u3051\u308bNAT\u306e\u4ee3\u66ff\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3<\/a><\/li>\n\n\n\n<li><a href=\"#04\">\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/a><\/li>\n\n\n\n<li><a href=\"#05\">\u307e\u3068\u3081<\/a><\/li>\n<\/ol>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"01\">1.IPv4\u306e\u6587\u8108\u3067NAT\u3092\u7406\u89e3\u3057\u3088\u3046&nbsp;<\/h2>\n\n\n\n<p>IPv4\u306f32\u30d3\u30c3\u30c8\u306e\u30a2\u30c9\u30ec\u30b9\u69cb\u9020\u3092\u6301\u3061\u300143\u5104\u306e\u30e6\u30cb\u30fc\u30af\u306a\u30a2\u30c9\u30ec\u30b9\u3092\u8a31\u5bb9\u3057\u307e\u3059\u3002\u8003\u3048\u3066\u307f\u308c\u3070\u5927\u304d\u306a\u6570\u5b57\u3067\u3059\u3002\u3057\u304b\u3057\u60b2\u3057\u3044\u3053\u3068\u306b\u3001\u4eca\u65e5\u306b\u81f3\u308b\u307e\u3067\u3001\u305d\u306e\u6570\uff08IPv4\u304c\u63d0\u4f9b\u3059\u308b\u6570\uff09\u306f\u6210\u9577\u3059\u308b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u5bfe\u5fdc\u3059\u308b\u306b\u306f\u5341\u5206\u306a\u5927\u304d\u3055\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u300280\u5e74\u4ee3\u306eIP\u79d1\u5b66\u8005\u305f\u3061\u306f\u3053\u306e\u3053\u3068\u3092\u77e5\u3063\u3066\u3044\u307e\u3057\u305f\u3002\u3044\u305a\u308c <a href=\"https:\/\/www.rapidseedbox.com\/ja\/ipv4-rental\/?blog=why-is-nat-not-needed-in-ipv6\" target=\"_blank\" rel=\"noreferrer noopener\">IPv6<\/a> \u304cIPv4\u3092\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u3092\u3002<\/p>\n\n\n\n<p>\u3064\u307e\u308a\u3001IPv6\u306f128\u30d3\u30c3\u30c8\u306e\u30a2\u30c9\u30ec\u30b9\u30b7\u30b9\u30c6\u30e0\u3092\u6301\u3064\u3002\u3053\u308c\u306f\u3001IPv6\u304cIPv4\u3088\u308a\u3082\u306f\u308b\u304b\u306b\u5e83\u3044\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3092\u30ab\u30d0\u30fc\u3059\u308b\u3053\u3068\u3092\u610f\u5473\u3059\u308b(<a href=\"https:\/\/www.rapidseedbox.com\/ja\/blog\/ipv6-vs-ipv4\">IPv6\u3068IPv4\u306e\u6bd4\u8f03<\/a>).\u4eca\u306e\u3068\u3053\u308d\uff08\u305d\u3057\u3066\u9577\u3044\u9593\uff09\u3001IPv6\u306f\u30a2\u30c9\u30ec\u30b9\u4e0d\u8db3\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3057\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u7ba1\u7406\u3092\u5bb9\u6613\u306b\u3059\u308b\u3002<\/p>\n\n\n\n<p>\u3057\u304b\u3057\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5168\u4f53\u3067IPv6\u3092\u5c55\u958b\u3059\u308b\u3053\u3068\u306f\u3001\u8a00\u3046\u306e\u306f\u7c21\u5358\u3067\u3059\u304c\u3001\u884c\u3046\u306e\u306f\u96e3\u3057\u3044\u306e\u3067\u3059\u3002\uff08<a href=\"https:\/\/www.rapidseedbox.com\/ja\/blog\/ipv6-migration\">IPv6\u3078\u306e\u79fb\u884c\u3068\u30e1\u30ea\u30c3\u30c8<\/a>)\u6587\u5b57\u901a\u308a\u4f55\u5341\u5104\u3082\u306e\u30b5\u30fc\u30d3\u30b9\u3001\u30c7\u30d0\u30a4\u30b9\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u3001\u3044\u307e\u3060\u306bIPv4\u3067\u76f8\u4e92\u306b\u901a\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u3060\u304b\u3089\u3001NAT\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u5909\u63db\u3002NAT44\u3068\u3082\u547c\u3070\u308c\u308b\uff09 <strong>\u306a\u3069\u306e<\/strong><\/strong> <strong>\u56de\u907f\u7b56\u304c\u4e00\u6642\u7684\u306a\u89e3\u6c7a\u7b56\u3068\u3057\u3066\u4f5c\u3089\u308c\u307e\u3057\u305f\u3002&nbsp;<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>a.NAT\u306f\u3069\u306e\u3088\u3046\u306a\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u306e\u304b\uff1f&nbsp;<\/strong><\/h4>\n\n\n\n<p>NAT\uff08Network Address Translation\uff09\u306f\u3001IPv4\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u3068\u3063\u3066\u5927\u304d\u306a\u610f\u5473\u3092\u6301\u3061\u307e\u3059\u3002 <strong>\u30eb\u30fc\u30bf\u30fc\u3084\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u306a\u30ed\u30fc\u30ab\u30ebIP\u30a2\u30c9\u30ec\u30b9\u3092\u30d1\u30d6\u30ea\u30c3\u30afIP\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3057\u305f\u308a\u3001\u305d\u306e\u9006\u306b\u5909\u63db\u3057\u305f\u308a\u3059\u308b\u306e\u306b\u4f7f\u3046\u3002 <\/strong>\u8a00\u3044\u63db\u3048\u308c\u3070\u3001NAT\u306f1\u3064\u306e\u30d1\u30d6\u30ea\u30c3\u30afIP\u30a2\u30c9\u30ec\u30b9\u3092\u30ed\u30fc\u30ab\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u8907\u6570\u306e\u30c7\u30d0\u30a4\u30b9\u3068\u5171\u6709\u3059\u308b\u65b9\u6cd5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u30011\u3064\u306e\u5bb6\u5ead\uff08\u591a\u6570\u306e\u30c7\u30d0\u30a4\u30b9\u3001\u591a\u6570\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\uff09\uff1d1\u3064\u306e\u30d1\u30d6\u30ea\u30c3\u30afIP\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u307e\u305f <a href=\"https:\/\/www.rapidseedbox.com\/ja\/blog\/cgnat\" target=\"_blank\" rel=\"noreferrer noopener\">\u30ad\u30e3\u30ea\u30a2\u30b0\u30ec\u30fc\u30c9NAT\uff08CGNAT\uff09<\/a> \u306f\u3001\u3053\u308c\u3092\u306f\u308b\u304b\u306b\u5927\u898f\u6a21\u306b\u884c\u3046\u3082\u306e\u3067\u3059\u3002\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u3001\u8fd1\u96a3\u3001\u30be\u30fc\u30f3\u5168\u4f53\u304c\u3001CGNAT\u3092\u901a\u3058\u3066\u5358\u4e00\u306e\u30d1\u30d6\u30ea\u30c3\u30afIP\u3092\u5171\u6709\u3057\u307e\u3059\u3002&nbsp;<\/p>\n\n\n\n<p>\u524d\u8ff0\u3057\u305f\u3088\u3046\u306b\u3001NAT\u306e\u80cc\u666f\u306b\u306f\u3001\uff08\u4e00\u7a2e\u306e\u5fdc\u6025\u51e6\u7f6e\u3068\u3057\u3066\uff09IPv4\u30a2\u30c9\u30ec\u30b9\u306e\u4e0d\u8db3\u306b\u5bfe\u51e6\u3059\u308b\u3068\u3044\u3046\u7406\u7531\u304c\u3042\u308a\u307e\u3057\u305f\u3002 <strong>\u3053\u306e\u5de7\u5999\u306a\u8a2d\u8a08\u306f\u3001IPv4\u30a2\u30c9\u30ec\u30b9\u3092\u7bc0\u7d04\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u30ed\u30fc\u30ab\u30eb\u30fb\u30c7\u30d0\u30a4\u30b9\u306e\u5185\u90e8IP\u30a2\u30c9\u30ec\u30b9\u3092\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304b\u3089\u96a0\u3059\u3053\u3068\u3067\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fb\u30ec\u30a4\u30e4\u30fc\u3092\u8ffd\u52a0\u3057\u3066\u3044\u307e\u3059\u3002<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>b.IPv4\u306eNAT\u306e\u4ed5\u7d44\u307f&nbsp;<\/strong><\/h4>\n\n\n\n<p>\u6b21\u306e\u56f3\u306f\u3001IPv4\u306b\u304a\u3051\u308bNAT\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u793a\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"982\" height=\"532\" src=\"https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/NAT-in-IPv6-03.png\" alt=\"\u306a\u305cIPv6\u3067\u306fNAT\u304c\u4e0d\u8981\u306a\u306e\u304b\uff1f\" class=\"wp-image-18677\" srcset=\"https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/NAT-in-IPv6-03.png 982w, https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/NAT-in-IPv6-03-300x163.png 300w, https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/NAT-in-IPv6-03-18x10.png 18w\" sizes=\"(max-width: 982px) 100vw, 982px\" \/><\/figure>\n\n\n\n<p><strong>\u5730\u5143\u306e\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\uff1a<\/strong> \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IPv4\u30a2\u30c9\u30ec\u30b9\uff0810.0.0.1\uff09\u3092\u6301\u3064\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30db\u30b9\u30c8\u304c\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3057\u305f\u3044\u5834\u5408\u3001\u30eb\u30fc\u30bf\u30fc\u306f\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u9593\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306bNAT\u3067\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u9001\u4fe1\u30d1\u30b1\u30c3\u30c8\u5909\u63db\uff1a <\/strong>\u30db\u30b9\u30c8\u304c\u30b5\u30fc\u30d0\u30fc\u306b\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u3068\u304d\u3001\u30d1\u30b1\u30c3\u30c8\u306b\u306f\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\uff08\u30db\u30b9\u30c8\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30a2\u30c9\u30ec\u30b9\u3067\u3042\u308b10.0.0.1\uff09\u3068\u5b9b\u5148IP\u30a2\u30c9\u30ec\u30b9\uff08\u30b5\u30fc\u30d0\u30fc\u306e\u30d1\u30d6\u30ea\u30c3\u30af\u30a2\u30c9\u30ec\u30b9\u3067\u3042\u308b200.100.10.1\uff09\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u30d1\u30b1\u30c3\u30c8\u304cNAT\u4ed8\u304d\u30eb\u30fc\u30bf\u30fc\u306b\u5230\u9054\u3059\u308b\u3068\u3001\u30eb\u30fc\u30bf\u30fc\u306f\u30bd\u30fc\u30b9IP\u30a2\u30c9\u30ec\u30b9\u3092\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30a2\u30c9\u30ec\u30b9\uff0810.0.0.1\uff09\u304b\u3089\u30eb\u30fc\u30bf\u30fc\u306e\u30d1\u30d6\u30ea\u30c3\u30afIP\u30a2\u30c9\u30ec\u30b9\uff08150.150.0.1\uff09\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u3053\u306e\u5909\u63db\u306b\u3088\u308a\u3001\u30d1\u30b1\u30c3\u30c8\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u7d4c\u7531\u3067\u30b5\u30fc\u30d0\u30fc\u306b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3055\u308c\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u7740\u4fe1\u30d1\u30b1\u30c3\u30c8\u5909\u63db\uff1a <\/strong>\u30b5\u30fc\u30d0\u30fc\u304c\u8fd4\u4fe1\u3059\u308b\u3068\u304d\u3001\u53d7\u4fe1\u30d1\u30b1\u30c3\u30c8\u306b\u306f\u30bd\u30fc\u30b9\u3068\u3057\u3066\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\uff08200.100.10.1\uff09\u3068\u5b9b\u5148\u3068\u3057\u3066\u30eb\u30fc\u30bf\u30fc\u306e\u516c\u958bIP\u30a2\u30c9\u30ec\u30b9\uff08150.150.0.1\uff09\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30d1\u30b1\u30c3\u30c8\u304cNAT\u30eb\u30fc\u30bf\u30fc\u306b\u5230\u9054\u3059\u308b\u3068\u3001NAT\u306f\u5b9b\u5148\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30db\u30b9\u30c8\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9\uff0810.0.0.1\uff09\u306b\u518d\u5909\u63db\u3057\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30db\u30b9\u30c8\u306f\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u8fd4\u4fe1\u3092\u53d7\u3051\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>c.IPv4\u306b\u304a\u3051\u308bNAT\u306e\u5236\u7d04\u306f\uff1f<\/strong><\/h4>\n\n\n\n<p>IPv4\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3051\u308bNAT\u306f\u305d\u306e\u5229\u70b9\u3092\u6301\u3061\u307e\u3059\u304c\u3001\u8907\u96d1\u3055\u3084\u30a8\u30f3\u30c9\u30c4\u30fc\u30a8\u30f3\u30c9\u901a\u4fe1\u306e\u59a8\u3052\u3001\u4e92\u63db\u6027\u306e\u554f\u984c\u306a\u3069\u3001\u516c\u5e73\u306a\u5206\u3051\u524d\u306e\u6b20\u70b9\u3082\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u5236\u9650\u306f\u3001IPv6\u306e\u3088\u3046\u306a\u3088\u308a\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb\u306a\u89e3\u6c7a\u7b56\u3078\u306e\u5fc5\u8981\u6027\u3092\u5f37\u8abf\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"02\">2.\u306a\u305cIPv6\u3067\u306fNAT\u304c\u4e0d\u8981\u306a\u306e\u304b\uff1f<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>a.\u5e83\u5927\u306a\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3002<\/strong><\/h4>\n\n\n\n<p>IPv6\u3067NAT\u304c\u4e0d\u8981\u306a\u4e3b\u306a\u7406\u7531\u306f\u3001IPv6\u304c\u5de8\u5927\u306a\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\uff08\u6b63\u78ba\u306b\u306f340\u5146\u500b\uff09\u3092\u6301\u3064\u305f\u3081\u3001NAT\u304c\u4e0d\u8981\u306b\u306a\u3063\u305f\u304b\u3089\u3060\u3002NAT\u306f\u3001IPv4\u306e\u9650\u3089\u308c\u305f\u30d7\u30fc\u30eb\u3092\u7bc0\u7d04\u3059\u308b\u305f\u3081\u306b\u3001\u3053\u306e\u305f\u3081\u306b\u660e\u78ba\u306b\u8a2d\u8a08\u3055\u308c\u307e\u3057\u305f\u3002\u3064\u307e\u308a\u3001\u3053\u306e\u81a8\u5927\u306a\u6570\u306e\u5229\u7528\u53ef\u80fd\u306a <a href=\"https:\/\/www.rapidseedbox.com\/ja\/blog\/what-is-ipv6\" target=\"_blank\" rel=\"noreferrer noopener\">IPv6\u30a2\u30c9\u30ec\u30b9<\/a>\u3069\u306e\u30db\u30b9\u30c8\u3084\u30e6\u30fc\u30b6\u30fc\u3082\u30d1\u30d6\u30ea\u30c3\u30afIPv6\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>b.\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5f37\u5316\u3002<\/strong><\/h4>\n\n\n\n<p>IPv4\u3068\u306f\u7570\u306a\u308a\u3001IPv6\u306f\u5f8c\u4ed8\u3051\u3067\u306f\u306a\u304f\u3001\u57fa\u672c\u7684\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3068\u3057\u3066\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5099\u3048\u3066\u3044\u308b\u3002IPv6\u306b\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\uff08IPsec\u3001\u30a8\u30f3\u30c9\u30c4\u30fc\u30a8\u30f3\u30c9\u6697\u53f7\u5316\u3001\u30bb\u30ad\u30e5\u30a2\u30cd\u30a4\u30d0\u30fc\u30c7\u30a3\u30b9\u30ab\u30d0\u30ea\u30fc\uff09\u304c\u30cd\u30a4\u30c6\u30a3\u30d6\u306b\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002 <strong>\u3053\u308c\u306b\u3088\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u5f37\u5316\u3055\u308c\u3001NAT\u306e\u5fc5\u8981\u6027\u304c\u306a\u304f\u306a\u308b\u3002 <\/strong>NAT\u306e\u76ee\u7684\u306fIPv4\u306e\u5236\u9650\u306b\u5bfe\u51e6\u3059\u308b\u3053\u3068\u3067\u3042\u308a\u3001NAT\u304c\u63d0\u4f9b\u3059\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306f\u8a2d\u8a08\u306e\u526f\u7523\u7269\u3067\u3042\u308b\u3002NAT\u306f\u5185\u90e8IP\u30a2\u30c9\u30ec\u30b9\u3092\u5916\u90e8\u306e\u8105\u5a01\u304b\u3089\u96a0\u3059\u305f\u3081\u3001\u4eba\u3005\u306fNAT\u3092\u4e8b\u5b9f\u4e0a\u306e\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3068\u3057\u3066\u4f7f\u3063\u3066\u3044\u308b\u306b\u904e\u304e\u306a\u3044\u3002<\/p>\n\n\n\n<p><strong><em>\u6ce8\u610f\uff1a<\/em><\/strong><em> IPv4 NAT\u306f\u771f\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u96a0\u853d\u3057\u3001IPSec\uff08IPv4\u3067\u3082\u5229\u7528\u53ef\u80fd\uff09\u306f\u6697\u53f7\u5316\u3068\u8a8d\u8a3c\u3092\u63d0\u4f9b\u3059\u308b\u304b\u3089\u3060\u3002\u5b9f\u969b\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08\u306e\u89b3\u70b9\u304b\u3089\u306f\u3001IPSec\u3068NAT\u306f\u4e92\u3044\u306b\u88dc\u5b8c\u3057\u5408\u3046\u53ef\u80fd\u6027\u3055\u3048\u3042\u308b\u3002&nbsp;<\/em><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>c.\u30b7\u30f3\u30d7\u30eb\u306a\u63a5\u7d9a\u6027\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08&nbsp;<\/strong><\/h4>\n\n\n\n<p>IPv6\u3067\u306f\u3001\u30a8\u30f3\u30c9\u30c4\u30fc\u30a8\u30f3\u30c9\u306e\u63a5\u7d9a\u6027\u306e\u5411\u4e0a\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08\u306e\u7c21\u7d20\u5316\u304c\u91cd\u8996\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001NAT\u306e\u5fc5\u8981\u6027\u304c\u5426\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u901a\u4fe1\u7d4c\u8def\u3092\u5f37\u5316\u3057\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306e\u8ee2\u9001\u3092\u5bb9\u6613\u306b\u3057\u3001NAT\u30c7\u30d0\u30a4\u30b9\uff08\u307e\u305f\u306f\u305d\u306e\u4ed6\u306e\u56de\u907f\u7b56\uff09\u306e\u3088\u3046\u306a\u4ef2\u4ecb\u8005\u3092\u6392\u9664\u3057\u3066\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5168\u4f53\u3067\u30c7\u30d0\u30a4\u30b9\u9593\u306e\u63a5\u7d9a\u3092\u6307\u793a\u3057\u307e\u3059\u3002IPv6\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u306b\u4e00\u610f\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08\u3092\u7c21\u7d20\u5316\u3057\u3001IPv4\u306b\u5b58\u5728\u3059\u308b\u30a2\u30c9\u30ec\u30b9\u5909\u63db\u306e\u8907\u96d1\u3055\u3092\u56de\u907f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"03\">3.IPv6\u306b\u304a\u3051\u308bNAT\u306e\u4ee3\u66ff\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\uff1f<\/h2>\n\n\n\n<p>\u307b\u3068\u3093\u3069\u306eIPv6\u5c0e\u5165\u3067\u306fNAT\u306f\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u304c\u3001NAT\u306e\u3088\u3046\u306a\u6a5f\u80fd\u304c\u6709\u7528\u306a\u4f7f\u7528\u30b1\u30fc\u30b9\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u3082\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u3088\u3046\u306a\u5834\u5408\u3001IPv4\u306e\u5f93\u6765\u306eNAT\u306e\u6b20\u70b9\u306a\u3057\u306b\u540c\u69d8\u306e\u76ee\u6a19\u3092\u9054\u6210\u3059\u308b\u305f\u3081\u306b\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ea\u30d5\u30a3\u30c3\u30af\u30b9\u5909\u63db\uff08NPTv6\uff09\u3084\u30dd\u30fc\u30c8\u5236\u5fa1\u30d7\u30ed\u30c8\u30b3\u30eb\uff08PCP\uff09\u306e\u3088\u3046\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <\/p>\n\n\n\n<p class=\"has-background\" style=\"background-color:#abc6df\"><em><strong>\u6ce8\u610f\uff1a<\/strong> \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u81a8\u5927\u306a\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3068\u30a8\u30f3\u30c9\u30c4\u30fc\u30a8\u30f3\u30c9\u306e\u63a5\u7d9a\u6027\u306b\u4f9d\u5b58\u3059\u308b\u3053\u3068\u3067\u3042\u308b\u305f\u3081\u3001\u3053\u308c\u3089\u306e\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306fIPv6\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u614e\u91cd\u304b\u3064\u63a7\u3048\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u3079\u304d\u3067\u3042\u308b\u3002\u3053\u308c\u3089\u306e\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306fNAT44\u306e\u4ee3\u66ff\u3067\u306f\u306a\u304f\u3001IPv6\u3068IPv4\u306e\u76f8\u4e92\u904b\u7528\u6027\u3092\u4fc3\u9032\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u3066\u3044\u308b\u3002 <\/em><\/p>\n\n\n\n<ul>\n<li><strong>NPTv6\uff1a<\/strong> \u3053\u308c\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u8b58\u5225\u5b50\u3092\u5909\u66f4\u305b\u305a\u306bIPv6\u30a2\u30c9\u30ec\u30b9\u306e\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u3092\u5909\u66f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002NPTv6\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30ea\u30ca\u30f3\u30d0\u30ea\u30f3\u30b0\u3001\u30de\u30eb\u30c1\u30db\u30fc\u30df\u30f3\u30b0\u3001\u30dd\u30ea\u30b7\u30fc\u5b9f\u65bd\u306a\u3069\u306e\u72b6\u6cc1\u3067\u4f7f\u7528\u53ef\u80fd\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>NAT64\uff1a<\/strong>IPv6\u30a2\u30c9\u30ec\u30b9\u3092IPv4\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001IPv6\u5c02\u7528\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304cIPv4\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u30ea\u30bd\u30fc\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30a8\u30f3\u30b8\u30a7\u30eb\u30fb\u30c0\u30b9\u30c8\uff1a<\/strong>\u30dd\u30fc\u30c8\u5236\u5fa1\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001IPv6\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3044\u3066\u3001NAT64\u306a\u3069\u306eNAT\u30c7\u30d0\u30a4\u30b9\u306b\u3088\u308b\u53d7\u4fe1\u30d1\u30b1\u30c3\u30c8\u306e\u8ee2\u9001\u65b9\u6cd5\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b21\u306e\u56f3\u306f\u3001IPv4\u306eNAT\u3068IPv6\u306e2\u3064\u306e\u30b7\u30ca\u30ea\u30aa\u306e\u9055\u3044\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002&nbsp;<\/h4>\n\n\n\n<ol>\n<li>IPv4\u306eNAT<\/li>\n\n\n\n<li>NAT\u30ec\u30b9IPv6&nbsp;<\/li>\n\n\n\n<li>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ea\u30d5\u30a3\u30c3\u30af\u30b9\u5909\u63db\uff08NPTv6\uff09<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"993\" height=\"537\" src=\"https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/NAT-in-IPv6-04.png\" alt=\"\u306a\u305cIPv6\u3067\u306fNAT\u304c\u4e0d\u8981\u306a\u306e\u304b\uff1f\" class=\"wp-image-18678\" srcset=\"https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/NAT-in-IPv6-04.png 993w, https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/NAT-in-IPv6-04-300x162.png 300w, https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/NAT-in-IPv6-04-18x10.png 18w\" sizes=\"(max-width: 993px) 100vw, 993px\" \/><figcaption class=\"wp-element-caption\"><em>\u3053\u306e\u56f3\u3067\u306f\u3001IPv4\u306e\u30a2\u30c9\u30ec\u30b9\u304c\u9650\u3089\u308c\u3066\u3044\u308b\u305f\u3081\u306bNAT\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u3053\u3068\u3068\u3001IPv6\u306e\u30a2\u30c9\u30ec\u30b9\u304c\u8c4a\u5bcc\u3067\u3042\u308b\u305f\u3081\u306b\u4e00\u822c\u7684\u306bNAT\u304c\u4e0d\u8981\u3067\u3042\u308b\u3053\u3068\u304c\u5bfe\u7167\u7684\u306b\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001NPTv6\u306f\u7279\u5b9a\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306e\u305f\u3081\u306e\u4ee3\u66ff\u624b\u6bb5\u3068\u3057\u3066\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/em><\/figcaption><\/figure>\n\n\n\n<p><strong>\u56f3\u4e2d\u306e\u5404\u30d1\u30fc\u30c4\u304c\u4f55\u3092\u8868\u3057\u3066\u3044\u308b\u304b\uff1a<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>IPv4\u306eNAT\uff1a <\/strong>\u6700\u521d\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u56f3\u306f\u3001\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u3042\u308b\u30ed\u30fc\u30ab\u30eb\u30db\u30b9\u30c8\u304c\u3001NAT\u3092\u5b9f\u88c5\u3057\u305f\u30eb\u30fc\u30bf\u30fc\/\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u4ecb\u3057\u3066\u516c\u958bIPv4\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3055\u308c\u3066\u3044\u308b\u69d8\u5b50\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u7834\u7dda\u306e\u8d64\u3044\u7dda\u3068\u77e2\u5370\u306f\u5909\u63db\u30d7\u30ed\u30bb\u30b9\u3092\u793a\u3057\u3001\u516c\u958b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u30ea\u30e2\u30fc\u30c8\u30db\u30b9\u30c8\u304c\u901a\u4fe1\u306e\u5bfe\u8c61\u3068\u3057\u3066\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<ul>\n<li><strong>NAT\u30ec\u30b9\u306eIPv6\uff1a <\/strong>2\u3064\u76ee\u306e\u56f3\u3067\u306f\u3001IPv6\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3064\u30ed\u30fc\u30ab\u30eb\u30db\u30b9\u30c8\u304c\u3001IPv6\u304c\u81a8\u5927\u306a\u6570\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u53ef\u80fd\u306b\u3059\u308b\u305f\u3081NAT\u3092\u5fc5\u8981\u3068\u305b\u305a\u306b\u3001\u76f4\u63a5IPv6\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u63a5\u7d9a\u3055\u308c\u3066\u3044\u308b\u69d8\u5b50\u304c\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30a2\u30c9\u30ec\u30b9\u306e\u7bc0\u7d04\u306e\u305f\u3081\u306bNAT\u304c\u4e0d\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u77e2\u5370\u306e\u3064\u3044\u305f\u7dd1\u8272\u306e\u7dda\u306f\u3001\u30ed\u30fc\u30ab\u30eb\u30db\u30b9\u30c8\u3068\u30ea\u30e2\u30fc\u30c8\u30db\u30b9\u30c8\u9593\u306e\u5909\u63db\u3055\u308c\u3066\u3044\u306a\u3044\u30d1\u30b9\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u3053\u306e\u30b7\u30ca\u30ea\u30aa\u3067\u306f\u3001\u5404\u30c7\u30d0\u30a4\u30b9\u306f\u901a\u5e38\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u306b\u4e00\u610f\u306aIPv6\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3061\u3001\u30a2\u30c9\u30ec\u30b9\u5909\u63db\u306e\u5fc5\u8981\u306a\u304f\u30a8\u30f3\u30c9\u30c4\u30fc\u30a8\u30f3\u30c9\u306e\u76f4\u63a5\u901a\u4fe1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/strong><\/li>\n<\/ul>\n\n\n\n<ul>\n<li><strong>NPTv6\uff1a <\/strong>3\u3064\u76ee\u306e\u56f3\u306f\u3001IPv6\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u63a5\u7d9a\u3055\u308c\u3066\u3044\u308b\u3001NPTv6\u3092\u5b9f\u88c5\u3057\u305f\u30eb\u30fc\u30bf\u30fc\/\u30d5\u30a1\u30a4\u30a2 \u30a6\u30a9\u30fc\u30eb\u306e\u80cc\u5f8c\u306b\u3042\u308bIPv6\u30a4\u30f3\u30c8\u30e9\u30cd\u30c3\u30c8\u5185\u306e\u30ed\u30fc\u30ab\u30eb\u30db\u30b9\u30c8\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002NPTv6\u306f\u3001IPv6\u30a2\u30c9\u30ec\u30b9\u306e\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u3092\u5909\u63db\u3059\u308b\u30e1\u30ab\u30cb\u30ba\u30e0\u3067\u3001IPv4\u306eNAT\u306e\u4ed5\u7d44\u307f\u3068\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001\u30a2\u30c9\u30ec\u30b9\u306e\u30db\u30b9\u30c8\u90e8\u5206\u306f\u5909\u66f4\u3055\u308c\u307e\u305b\u3093\u3002\u7d2b\u8272\u306e\u7834\u7dda\u306f\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u5909\u63db\u30d7\u30ed\u30bb\u30b9\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"04\">4.\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>a.NAT\u306a\u3057\u3067\u9054\u6210\u3055\u308c\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u52b9\u7387\u306e\u5411\u4e0a\u306e\u5b9f\u4f8b\u306f\uff1f<\/strong><\/h4>\n\n\n\n<p>\u826f\u3044\u5b9f\u4f8b\u304c\u3042\u308a\u307e\u3059\u3002 <a href=\"https:\/\/corporate.comcast.com\/comcast-voices\/ipv6-deployment-technology\" target=\"_blank\" rel=\"noreferrer noopener\">\u30b3\u30e0\u30ad\u30e3\u30b9\u30c8\uff08\u73feXfinity\uff09<\/a>\u306f\u3001\u7c73\u56fd\u6700\u5927\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30fb\u30b5\u30fc\u30d3\u30b9\u30fb\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306e1\u3064\u3067\u3059\u3002\u540c\u793e\u306f\u3001IPv6\u306b\u5207\u308a\u66ff\u3048\u305f\u3053\u3068\u3067\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u7ba1\u7406\u304c\u5927\u5e45\u306b\u6539\u5584\u3055\u308c\u307e\u3057\u305f\u3002IPv6\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306bNAT\u304c\u306a\u3044\u305f\u3081\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u30b7\u30f3\u30d7\u30eb\u306b\u306a\u308a\u3001\u5f85\u3061\u6642\u9593\u304c\u77ed\u7e2e\u3055\u308c\u3001\u9867\u5ba2\u306e\u63a5\u7d9a\u6027\u304c\u5411\u4e0a\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u3001NAT44\u306b\u4f9d\u5b58\u3057\u306a\u3044\u5927\u898f\u6a21\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3051\u308bIPv6\u306e\u5b9f\u7528\u7684\u306a\u5229\u70b9\u3092\u8868\u3057\u3066\u3044\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>b.NAT64\u3068\u306f\uff1f&nbsp;<\/strong><\/h4>\n\n\n\n<p>NAT64 translates IPv6 addresses to IPv4 addresses, enabling communication between IPv6 and IPv4 devices. This protocol allows IPv6-only devices to access IPv4 resources. NAT64 bridges the IPv4-<a href=\"https:\/\/www.rapidseedbox.com\/blog\/ipv6-transition-mechanisms\" target=\"_blank\" rel=\"noreferrer noopener\">IPv6 transition<\/a>, allowing IPv6-only networks to access IPv4 resources. However, it can introduce complexities such as application compatibility and address exhaustion.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>c.IPv6\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u304cIPv4\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3059\u308b\u969b\u306bNAT\u3092\u30d0\u30a4\u30d1\u30b9\u3057\u3001\u30a8\u30f3\u30c9\u30c4\u30fc\u30a8\u30f3\u30c9\u306e\u63a5\u7d9a\u6027\u3092\u7dad\u6301\u3059\u308b\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3088\u3044\u3067\u3057\u3087\u3046\u304b\uff1f<\/strong><\/h4>\n\n\n\n<p>IPv6\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u3042\u308b\u3002 <a href=\"https:\/\/www.rapidseedbox.com\/blog\/teredo\" target=\"_blank\" rel=\"noreferrer noopener\">\u30c6\u30ec\u30c9<\/a> \u30846to4\u306a\u3069\u3001IPv6\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u304cIPv4\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3059\u308b\u969b\u306bNAT\u30c7\u30d0\u30a4\u30b9\u3092\u901a\u904e\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u4ed5\u7d44\u307f\u304c\u3042\u308b\u3002\u3053\u308c\u3089\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u306f\u3001IPv6\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067NAT\u306b\u983c\u308b\u3053\u3068\u306a\u304f\u30a8\u30f3\u30c9\u30c4\u30fc\u30a8\u30f3\u30c9\u306e\u63a5\u7d9a\u6027\u3092\u7dad\u6301\u3059\u308b\u306e\u306b\u5f79\u7acb\u3064\u3002<\/p>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"05\">5.\u307e\u3068\u3081<\/h2>\n\n\n\n<p><strong>NAT\u306fIPv4\u3092\u5b58\u7d9a\u3055\u305b\u308b\u4e0a\u3067\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u305f\u304c\u3001\u73fe\u5728\u3067\u306f\u6642\u4ee3\u9045\u308c\u3068\u306a\u3063\u3066\u3044\u308b\u3002 <a href=\"https:\/\/www.rapidseedbox.com\/ja\/ipv4-rental\/?blog=why-is-nat-not-needed-in-ipv6\" target=\"_blank\" rel=\"noreferrer noopener\">IPv6\u74b0\u5883<\/a>\u3059\u3079\u3066\u306e\u30c7\u30d0\u30a4\u30b9\u304c\u72ec\u81ea\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/strong> \u3053\u306e\u5909\u5316\u306f\u3001\u63a5\u7d9a\u6027\u3092\u5408\u7406\u5316\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u5b89\u5168\u3067\u3001\u5897\u3048\u7d9a\u3051\u308b\u63a5\u7d9a\u30c7\u30d0\u30a4\u30b9\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30fb\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u65b0\u6642\u4ee3\u3092\u544a\u3052\u308b\u3082\u306e\u3067\u3059\u3002 <\/p>\n\n\n\n<p>\u5927\u898f\u6a21\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e8b\u4f8b\u3068\u79fb\u884c\u30b7\u30ca\u30ea\u30aa\u306e\u4ee3\u66ff\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306b\u3088\u308a\u3001IPv6\u3078\u306e\u79fb\u884c\u306f\u5358\u306a\u308b\u6280\u8853\u7684\u306a\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3067\u306f\u306a\u304f\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u63a5\u7d9a\u6027\u306e\u5c06\u6765\u306b\u3068\u3063\u3066\u5fc5\u8981\u306a\u9032\u5316\u3067\u3042\u308b\u3068\u3044\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading has-text-align-center has-background\" style=\"background-color:#b0f2b6\"><strong>NAT\u306e\u7169\u308f\u3057\u3055\u306b\u30b5\u30e8\u30ca\u30e9<\/strong>! <em><strong>\ud83c\udf10<\/strong><\/em><br><br><em>RapidSeedbox\u3067IPv6\u306e\u7121\u9650\u306e\u4e16\u754c\u306b\u98db\u3073\u8fbc\u3082\u3046\uff01 <br><\/em><br>\u4ef2\u4ecb\u8005\u3092\u4ecb\u3055\u305a\u3001\u76f4\u63a5IP\u3092\u6240\u6709\u3059\u308b\u3002<br>24\u6642\u9593\u5e74\u4e2d\u7121\u4f11\u306e\u30b5\u30dd\u30fc\u30c8\u3067\u3001\u3044\u3064\u3067\u3082\u3042\u306a\u305f\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002<br>\u30aa\u30fc\u30c0\u30fc\u30e1\u30a4\u30c9\u306e\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3067\u3001\u3042\u306a\u305f\u306b\u3074\u3063\u305f\u308a\u306e\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3092\u3002<br>\u660e\u78ba\u306a\u30b3\u30b9\u30c8\u3001\u30b5\u30d7\u30e9\u30a4\u30ba\u306a\u3057\u3002<br><br><em>NAT\u30d5\u30ea\u30fc\u306e\u65c5\u3092\u59cb\u3081\u3088\u3046<\/em><\/h4>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-2\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/www.rapidseedbox.com\/ja\/ipv4-rental\/?promocode=IPV620OFF&amp;billingcycle=monthly#pricing\" style=\"background-color:#22c55e\"><strong>\u4eca\u3059\u3050Rapidseedbox\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3001\u521d\u670820%\u306e\u7279\u5225\u5272\u5f15\u3092\u624b\u306b\u5165\u308c\u3088\u3046\uff01<\/strong><\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>\u306a\u305cIPv6\u3067\u306fNAT\u304c\u4e0d\u8981\u306a\u306e\u3067\u3059\u304b\uff1fIPv6\u306b\u306f\u5e83\u5927\u306a\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u304c\u3042\u308b\u305f\u3081\u3001IPv6\u30a2\u30c9\u30ec\u30b9\u306bNAT\u306f\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u6a5f\u5668\u9593\u306e\u76f4\u63a5\u901a\u4fe1\u304c\u53ef\u80fd\u306b\u306a\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u7c21\u7d20\u5316\u3055\u308c\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>","protected":false},"author":145,"featured_media":25714,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[39],"tags":[455,410,735,310,736,688,737,319,453,440,734,454],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Why IPv6 Doesn\u2019t Need NAT: Explained with NAT66 &amp; NPTv6<\/title>\n<meta name=\"description\" content=\"See why IPv6 removes the need for NAT and how routing and security work instead. Learn when NAT66 or NPTv6 apply and if IPv6 uses NAT at all.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rapidseedbox.com\/ja\/blog\/why-is-nat-not-needed-in-ipv6\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why IPv6 Doesn\u2019t Need NAT: Explained with NAT66 &amp; NPTv6\" \/>\n<meta property=\"og:description\" content=\"See why IPv6 removes the need for NAT and how routing and security work instead. Learn when NAT66 or NPTv6 apply and if IPv6 uses NAT at all.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.rapidseedbox.com\/ja\/blog\/why-is-nat-not-needed-in-ipv6\" \/>\n<meta property=\"og:site_name\" content=\"RapidSeedbox\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/RapidSeedbox\/\" \/>\n<meta property=\"article:published_time\" content=\"2023-11-30T16:26:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-17T13:50:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.rapidseedbox.com\/wp-content\/uploads\/Why-is-NAT-not-needed-in-IPv6.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1748\" \/>\n\t<meta property=\"og:image:height\" content=\"906\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Diego Asturias\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@rapidseedbox\" \/>\n<meta name=\"twitter:site\" content=\"@rapidseedbox\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"Diego Asturias\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"9\u5206\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Why IPv6 Doesn\u2019t Need NAT: Explained with NAT66 & NPTv6","description":"See why IPv6 removes the need for NAT and how routing and security work instead. 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