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8px;\">\u901a\u4fe1\u7528\u3068\u306f\u5225\u306e\u30bb\u30b0\u30e1\u30f3\u30c8\u306b\u8a2d\u3051\u3089\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u3053\u306e\u3088\u3046\u306b\u5f79\u5272\u3092\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u901a\u4fe1\u91cf\u304c\u591a\u3044\u3068\u304d\u3067\u3082\u5b89\u5b9a\u3057\u3066\u6a5f\u5668\u3092\u7ba1\u7406\u3067\u304d\u305f\u308a\u3001\u7ba1\u7406\u7d4c\u8def\u3092\u5206\u96e2\u3057\u3066\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u9ad8\u3081\u305f\u308a\u3059\u308b\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\u539f\u5247\uff1a\u300c\u540c\u3058\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u3082\u5fc5\u305aIP\u306f\u5b58\u5728\u3059\u308b\u300d<\/h3>\n<p>\u300c\u540c\u3058\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u901a\u4fe1\u306f\u3001\u6700\u7d42\u7684\u306bMAC\u30a2\u30c9\u30ec\u30b9\u3067\u884c\u308f\u308c\u308b\u306e\u306b\u3001\u306a\u305cIP\u30a2\u30c9\u30ec\u30b9\u304c\u5fc5\u8981\u306a\u306e\uff1f\u300d\u3068\u7591\u554f\u306b\u601d\u3046\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<br \/>\n\u78ba\u304b\u306b\u3001\u540c\u4e00\u30bb\u30b0\u30e1\u30f3\u30c8\u5185\u3067\u306fARP\uff08Address Resolution Protocol\uff09\u306b\u3088\u3063\u3066IP\u30a2\u30c9\u30ec\u30b9\u304b\u3089MAC\u30a2\u30c9\u30ec\u30b9\u3092\u7279\u5b9a\u3057\u3001\u6700\u7d42\u7684\u306b\u306fMAC\u30a2\u30c9\u30ec\u30b9\u5b9b\u306b\u30d5\u30ec\u30fc\u30e0\u304c\u9001\u3089\u308c\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u305d\u306eARP\u3067\u554f\u3044\u5408\u308f\u305b\u308b\u305f\u3081\u306b\u306f\u3001<strong>\u305d\u3082\u305d\u3082\u5b9b\u5148\u3068\u306a\u308b\u6a5f\u5668\u304cIP\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3063\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/strong><\/p>\n<p>\u3064\u307e\u308a\u3001\u901a\u4fe1\u306e\u300c\u8d77\u70b9\u300d\u3084\u300c\u7d42\u70b9\u300d\u3001\u300c\u4e2d\u7d99\u70b9\u300d\u3068\u306a\u308b\u6a5f\u5668\u306f\u3001TCP\/IP\u306e\u30eb\u30fc\u30eb\u306b\u5f93\u3046\u305f\u3081\u306b\u5fc5\u305aIP\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3063\u3066\u3044\u308b\u3001\u3068\u7406\u89e3\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002\uff08\u203b\u30ec\u30a4\u30e42\u30b9\u30a4\u30c3\u30c1\u306a\u3069\u3001\u4e00\u90e8IP\u3092\u6301\u305f\u306a\u3044\u6a5f\u5668\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u5fdc\u7528\u60c5\u5831\u306e\u8a66\u9a13\u3067\u7d4c\u8def\u3092\u8003\u3048\u308b\u4e0a\u3067\u306f\u3001\u30eb\u30fc\u30bf\u30fc\u3084\u30b5\u30fc\u30d0\u30fc\u7b49\u306e\u4e3b\u8981\u6a5f\u5668\u306f\u3059\u3079\u3066IP\u3092\u6301\u3064\u524d\u63d0\u3067\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002\uff09<\/p>\n<h2>IP\u30a2\u30c9\u30ec\u30b9\u3092\u5909\u63db\u3059\u308b\u6a5f\u5668\u3068\u306f\uff1fNAT\u30fbNAPT\u306e\u9055\u3044\u3068\u5404\u88c5\u7f6e\u306e\u52d5\u4f5c\u3092\u56f3\u89e3<\/h2>\n<p>\u901a\u4fe1\u306e\u9014\u4e2d\u3067IP\u30a2\u30c9\u30ec\u30b9\u304c\u66f8\u304d\u63db\u3048\u3089\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9\u3068\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\u3092\u76f8\u4e92\u306b\u5909\u63db\u3059\u308b\u6280\u8853\u306f\u3001\u73fe\u4ee3\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u3053\u306e\u4e2d\u6838\u3092\u306a\u3059\u306e\u304c\u300cNAT\u300d\u3068\u300cNAPT\u300d\u3067\u3059\u3002\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u9055\u3044\u3092\u6b63\u78ba\u306b\u7406\u89e3\u3057\u3066\u3044\u308b\u304b\u304c\u554f\u308f\u308c\u307e\u3059\u3002<\/p>\n<h3>NAT\u3068NAPT\u306e\u6c7a\u5b9a\u7684\u306a\u9055\u3044<\/h3>\n<p>NAT\u3068NAPT\u306f\u3069\u3061\u3089\u3082IP\u30a2\u30c9\u30ec\u30b9\u3092\u5909\u63db\u3059\u308b\u6280\u8853\u3067\u3059\u304c\u3001\u305d\u306e\u5909\u63db\u65b9\u5f0f\u306b\u5927\u304d\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>NAT (Network Address Translation)<\/strong><br \/>\n    IP\u30a2\u30c9\u30ec\u30b9\u3092<strong>1\u5bfe1<\/strong>\u3067\u5909\u63db\u3059\u308b\u6280\u8853\u3067\u3059\u3002\u4f8b\u3048\u3070\u30011\u3064\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9\u3092\u3001\u3042\u3089\u304b\u3058\u3081\u7528\u610f\u3057\u3066\u304a\u3044\u305f1\u3064\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u5909\u63db\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9\u306e\u6570\u3060\u3051\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\u304c\u5fc5\u8981\u306b\u306a\u308b\u305f\u3081\u3001IP\u30a2\u30c9\u30ec\u30b9\u306e\u7bc0\u7d04\u52b9\u679c\u306f\u3042\u307e\u308a\u3042\u308a\u307e\u305b\u3093\u3002\u4e3b\u306b\u3001\u7279\u5b9a\u306e\u30b5\u30fc\u30d0\u30fc\u3092\u5916\u90e8\u306b\u516c\u958b\u3059\u308b\u969b\u306a\u3069\u306b\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n<li><strong>NAPT (Network Address Port Translation)<\/strong><br \/>\n    IP\u30a2\u30c9\u30ec\u30b9\u3068<strong>\u30dd\u30fc\u30c8\u756a\u53f7<\/strong>\u3092\u30bb\u30c3\u30c8\u3067\u5909\u63db\u3059\u308b\u6280\u8853\u3067\u3059\u3002\u300cIP\u30de\u30b9\u30ab\u30ec\u30fc\u30fc\u30c9\u300d\u3068\u3082\u547c\u3070\u308c\u3001\u73fe\u5728\u6700\u3082\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u8907\u6570\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9\u3092\u3001<strong>1\u3064\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9<\/strong>\u306b\u96c6\u7d04\u3057\u3066\u5909\u63db\u3067\u304d\u307e\u3059\u3002\u30dd\u30fc\u30c8\u756a\u53f7\u3092\u5909\u3048\u308b\u3053\u3068\u3067\u3001\u3069\u306e\u7aef\u672b\u304b\u3089\u306e\u901a\u4fe1\u304b\u3092\u8b58\u5225\u3059\u308b\u305f\u3081\u3001\u300c\u591a\u5bfe1\u300d\u306e\u5909\u63db\u304c\u53ef\u80fd\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\u3092\u5927\u5e45\u306b\u7bc0\u7d04\u3067\u304d\u307e\u3059\u3002\u5bb6\u5ead\u3084\u4f01\u696d\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u306e\u306f\u3001\u307b\u3068\u3093\u3069\u304c\u3053\u306eNAPT\u3067\u3059\u3002<\/li>\n<\/ul>\n<h3>\u3010\u91cd\u8981\u3011\u5404\u6a5f\u5668\u306f\u300c\u9001\u4fe1\u5143\u300d\u300c\u5b9b\u5148\u300d\u306e\u3069\u3061\u3089\u3092\u66f8\u304d\u63db\u3048\u308b\u304b\uff1f<\/h3>\n<p>IP\u30a2\u30c9\u30ec\u30b9\u306e\u66f8\u304d\u63db\u3048\u306f\u3001\u4e3b\u306b\u300c\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u300d\u306e\u66f8\u304d\u63db\u3048\u3068\u300c\u5b9b\u5148IP\u30a2\u30c9\u30ec\u30b9\u300d\u306e\u66f8\u304d\u63db\u3048\u306e2\u30d1\u30bf\u30fc\u30f3\u306b\u5206\u3051\u3089\u308c\u307e\u3059\u3002\u6a5f\u5668\u306b\u3088\u3063\u3066\u3069\u3061\u3089\u3092\u66f8\u304d\u63db\u3048\u308b\u304b\u304c\u6c7a\u307e\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<table border=\"1\" style=\"width:100%; border-collapse: collapse;\">\n<thead>\n<tr>\n<th style=\"padding: 8px; background-color: #f2f2f2;\">\u6a5f\u5668<\/th>\n<th style=\"padding: 8px; background-color: #f2f2f2;\">\u66f8\u304d\u63db\u3048\u308bIP\u30a2\u30c9\u30ec\u30b9<\/th>\n<th style=\"padding: 8px; background-color: #f2f2f2;\">\u4e3b\u306a\u76ee\u7684\u30fb\u52d5\u4f5c<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>NAPT\u30eb\u30fc\u30bf\u30fc<\/strong><\/td>\n<td style=\"padding: 8px;\"><strong>\u9001\u4fe1\u5143<\/strong>IP<\/td>\n<td style=\"padding: 8px;\">\u5185\u90e8LAN\u304b\u3089\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3078\u51fa\u308b\u969b\u3001\u9001\u4fe1\u5143\u3092\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u304b\u3089\u30b0\u30ed\u30fc\u30d0\u30ebIP\u3078\u5909\u63db\u3059\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0<\/strong><\/td>\n<td style=\"padding: 8px;\"><strong>\u9001\u4fe1\u5143<\/strong>IP<\/td>\n<td style=\"padding: 8px;\">\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u4ee3\u7406\u3068\u3057\u3066\u901a\u4fe1\u3059\u308b\u305f\u3081\u3001\u9001\u4fe1\u5143IP\u304c\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u81ea\u8eab\u306eIP\u306b\u7f6e\u304d\u63db\u308f\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5<\/strong><\/td>\n<td style=\"padding: 8px;\"><strong>\u5b9b\u5148<\/strong>IP<\/td>\n<td style=\"padding: 8px;\">\u4ee3\u8868IP\uff08\u4eee\u60f3IP\uff09\u5b9b\u306e\u901a\u4fe1\u3092\u53d7\u3051\u3001\u8ca0\u8377\u306e\u5c11\u306a\u3044\u914d\u4e0b\u306e\u5b9f\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u306b\u5b9b\u5148\u3092\u66f8\u304d\u63db\u3048\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u30ea\u30d0\u30fc\u30b9\u30d7\u30ed\u30ad\u30b7<\/strong><\/td>\n<td style=\"padding: 8px;\"><strong>\u5b9b\u5148<\/strong>IP<\/td>\n<td style=\"padding: 8px;\">\u5916\u90e8\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u3092\u4ee3\u7406\u3067\u53d7\u3051\u4ed8\u3051\u3001\u9069\u5207\u306a\u5185\u90e8\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u306b\u5b9b\u5148\u3092\u66f8\u304d\u63db\u3048\u308b\u3002\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u3068\u4f3c\u305f\u52d5\u304d\u3092\u3059\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>NAT\u6a5f\u80fd\u4ed8\u304d\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/strong><\/td>\n<td style=\"padding: 8px;\">\u9001\u4fe1\u5143 or \u5b9b\u5148<\/td>\n<td style=\"padding: 8px;\">\u8a2d\u5b9a\u306b\u3088\u308a\u3001NAPT\u30eb\u30fc\u30bf\u30fc\u306e\u3088\u3046\u306b\u9001\u4fe1\u5143\u3092\u5909\u63db\u3057\u305f\u308a\u3001\u7279\u5b9a\u306e\u30b5\u30fc\u30d0\u30fc\u516c\u958b\u306e\u305f\u3081\u306b\u5b9b\u5148\u3092\u5909\u63db\uff08\u9759\u7684NAT\uff09\u3057\u305f\u308a\u3059\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u30d1\u30b1\u30c3\u30c8\u4f8b\u3067\u898b\u308bIP\u30a2\u30c9\u30ec\u30b9\u5909\u63db\u306eBefore\/After<\/h3>\n<p>\u5b9f\u969b\u306bNAPT\u30eb\u30fc\u30bf\u30fc\u3092\u901a\u904e\u3059\u308b\u969b\u306e\u30d1\u30b1\u30c3\u30c8\u304c\u3069\u306e\u3088\u3046\u306b\u5909\u5316\u3059\u308b\u304b\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><strong>\u3010\u524d\u63d0\u3011<\/strong><\/p>\n<ul>\n<li>\u3042\u306a\u305f\u306ePC\uff1a <code>192.168.1.10<\/code> \uff08\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\uff09<\/li>\n<li>NAPT\u30eb\u30fc\u30bf\u30fc\uff1a <code>203.0.113.1<\/code> \uff08\u30b0\u30ed\u30fc\u30d0\u30ebIP\uff09<\/li>\n<li>Web\u30b5\u30fc\u30d0\u30fc\uff1a <code>198.51.100.50<\/code> \uff08\u516c\u958b\u30b5\u30fc\u30d0\u30fc\uff09<\/li>\n<\/ul>\n<p><strong>\u3010\u884c\u304d\uff1aPC \u2192 Web\u30b5\u30fc\u30d0\u30fc\u3011<\/strong><\/p>\n<pre style=\"background-color:#eee; padding:10px; border-radius:5px;\">\n<strong>\u25bc Before: LAN\u5185\u90e8 (\u30eb\u30fc\u30bf\u30fc\u901a\u904e\u524d)<\/strong>\n\u9001\u4fe1\u5143IP: 192.168.1.10\n\u9001\u4fe1\u5143\u30dd\u30fc\u30c8: 50000 (\u4efb\u610f)\n\u5b9b\u5148IP: 198.51.100.50\n\u5b9b\u5148\u30dd\u30fc\u30c8: 443 (HTTPS)\n\n<strong>\u25bc After: \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 (\u30eb\u30fc\u30bf\u30fc\u901a\u904e\u5f8c)<\/strong>\n\u9001\u4fe1\u5143IP: <span style=\"color:red; font-weight:bold;\">203.0.113.1<\/span>\n\u9001\u4fe1\u5143\u30dd\u30fc\u30c8: <span style=\"color:red; font-weight:bold;\">12345 (\u30eb\u30fc\u30bf\u30fc\u304c\u5909\u63db)<\/span>\n\u5b9b\u5148IP: 198.51.100.50\n\u5b9b\u5148\u30dd\u30fc\u30c8: 443\n<\/pre>\n<p>\u30eb\u30fc\u30bf\u30fc\u306f\u300c<code>192.168.1.10:50000<\/code>\u300d\u304b\u3089\u306e\u901a\u4fe1\u3092\u300c<code>203.0.113.1:12345<\/code>\u300d\u306b\u5909\u63db\u3057\u305f\u3001\u3068\u3044\u3046\u5bfe\u5fdc\u3092\u5909\u63db\u30c6\u30fc\u30d6\u30eb\u306b\u8a18\u9332\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u3010\u5e30\u308a\uff1aWeb\u30b5\u30fc\u30d0\u30fc \u2192 PC\u3011<\/strong><\/p>\n<pre style=\"background-color:#eee; padding:10px; border-radius:5px;\">\n<strong>\u25bc Before: \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 (\u30eb\u30fc\u30bf\u30fc\u5230\u7740\u6642)<\/strong>\n\u9001\u4fe1\u5143IP: 198.51.100.50\n\u9001\u4fe1\u5143\u30dd\u30fc\u30c8: 443\n\u5b9b\u5148IP: 203.0.113.1\n\u5b9b\u5148\u30dd\u30fc\u30c8: 12345\n\n<strong>\u25bc After: LAN\u5185\u90e8 (\u30eb\u30fc\u30bf\u30fc\u901a\u904e\u5f8c)<\/strong>\n\u9001\u4fe1\u5143IP: 198.51.100.50\n\u9001\u4fe1\u5143\u30dd\u30fc\u30c8: 443\n\u5b9b\u5148IP: <span style=\"color:red; font-weight:bold;\">192.168.1.10<\/span>\n\u5b9b\u5148\u30dd\u30fc\u30c8: <span style=\"color:red; font-weight:bold;\">50000<\/span>\n<\/pre>\n<p>\u30eb\u30fc\u30bf\u30fc\u306f\u8a18\u9332\u3057\u3066\u304a\u3044\u305f\u5909\u63db\u30c6\u30fc\u30d6\u30eb\u3092\u53c2\u7167\u3057\u3001\u5b9b\u5148\u3092\u5143\u306ePC\u306eIP\u30a2\u30c9\u30ec\u30b9\u3068\u30dd\u30fc\u30c8\u756a\u53f7\u306b\u623b\u3057\u3066LAN\u5185\u90e8\u306b\u30d1\u30b1\u30c3\u30c8\u3092\u5c4a\u3051\u307e\u3059\u3002\u3053\u306e\u4e00\u9023\u306e\u52d5\u304d\u306b\u3088\u308a\u3001\u8907\u6570\u306e\u7aef\u672b\u304c1\u3064\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP\u3092\u5171\u6709\u3057\u3066\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u901a\u4fe1\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n<h2>DNS\u767b\u9332\u304c\u5fc5\u9808\u306a\u6a5f\u5668\u3068\u4e0d\u8981\u306a\u6a5f\u5668\uff5c\u540d\u524d\u89e3\u6c7a\u306e\u57fa\u672c\u539f\u5247\u3092\u6574\u7406<\/h2>\n<p>\u3059\u3079\u3066\u306e\u6a5f\u5668\u304cIP\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3064\u306e\u306a\u3089\u3001\u3059\u3079\u3066\u306e\u6a5f\u5668\u3092DNS\u306b\u767b\u9332\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f\u7b54\u3048\u306f\u300c\u3044\u3044\u3048\u300d\u3067\u3059\u3002DNS\u3078\u306e\u767b\u9332\u8981\u5426\u306f\u3001\u305d\u306e\u6a5f\u5668\u306e\u5f79\u5272\u306b\u3088\u3063\u3066\u660e\u78ba\u306b\u5206\u304b\u308c\u307e\u3059\u3002\u3053\u306e\u533a\u5225\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u306e\u8a2d\u8a08\u3084\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u9375\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u5927\u539f\u5247\uff1a\u300c\u540d\u524d\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5bfe\u8c61\u300d\u3060\u3051\u3092DNS\u306b\u767b\u9332\u3059\u308b<\/h3>\n<p>DNS\uff08Domain Name System\uff09\u306e\u5f79\u5272\u306f\u3001<code>www.example.com<\/code>\u306e\u3088\u3046\u306a\u4eba\u9593\u304c\u899a\u3048\u3084\u3059\u3044\u300c\u540d\u524d\uff08\u30c9\u30e1\u30a4\u30f3\u540d\uff09\u300d\u3092\u3001<code>198.51.100.50<\/code>\u306e\u3088\u3046\u306a\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u7406\u89e3\u3067\u304d\u308b\u300cIP\u30a2\u30c9\u30ec\u30b9\u300d\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u306e\u5f79\u5272\u3092\u8003\u3048\u308c\u3070\u3001\u539f\u5247\u306f\u975e\u5e38\u306b\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u3002<\/p>\n<p><strong>DNS\u3078\u306e\u767b\u9332\u304c\u5fc5\u8981\u306a\u306e\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u3084\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u300c\u540d\u524d\u3067\u300d\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3044\u6a5f\u5668\u3060\u3051\u3067\u3059\u3002<\/strong><\/p>\n<p>\u9006\u306b\u8a00\u3048\u3070\u3001IP\u30a2\u30c9\u30ec\u30b9\u3055\u3048\u5206\u304b\u3063\u3066\u3044\u308c\u3070\u901a\u4fe1\u3067\u304d\u308b\u6a5f\u5668\u3001\u7279\u306b\u901a\u4fe1\u306e\u7d4c\u8def\u4e0a\u306b\u5b58\u5728\u3059\u308b\u3060\u3051\u306e\u6a5f\u5668\u306f\u3001\u57fa\u672c\u7684\u306bDNS\u306b\u767b\u9332\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h3>\u306a\u305c\u7d4c\u8def\u4e0a\uff08\u30eb\u30fc\u30bf\u30fc\u30fbFW\uff09\u306e\u6a5f\u5668\u306fDNS\u767b\u9332\u304c\u4e0d\u8981\u306a\u306e\u304b\uff1f<\/h3>\n<p>PC\u304b\u3089\u30b5\u30fc\u30d0\u30fc\u3078\u30d1\u30b1\u30c3\u30c8\u304c\u9001\u3089\u308c\u308b\u3068\u304d\u3001\u901a\u4fe1\u7d4c\u8def\u4e0a\u306e\u30eb\u30fc\u30bf\u30fc\u3084\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306f\u300c\u6b21\u306e\u5b9b\u5148\uff08\u30cd\u30af\u30b9\u30c8\u30db\u30c3\u30d7\uff09\u300d\u3092IP\u30a2\u30c9\u30ec\u30b9\u3067\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u5404\u30eb\u30fc\u30bf\u30fc\u304c\u6301\u3063\u3066\u3044\u308b\u300c\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u300d\u3068\u3044\u3046\u7d4c\u8def\u60c5\u5831\u306b\u57fa\u3065\u3044\u3066\u884c\u308f\u308c\u307e\u3059\u3002\u305d\u3053\u306b\u306f\u300c\u3053\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5b9b\u306e\u30d1\u30b1\u30c3\u30c8\u306f\u3001\u6b21\u306f\u3053\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3064\u30eb\u30fc\u30bf\u30fc\u306b\u9001\u308c\u300d\u3068\u3044\u3063\u305f\u60c5\u5831\u304c\u66f8\u304b\u308c\u3066\u304a\u308a\u3001\u540d\u524d\u89e3\u6c7a\uff08DNS\uff09\u3092\u4ecb\u3059\u308b\u4f59\u5730\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3064\u307e\u308a\u3001\u901a\u4fe1\u3092\u4e2d\u7d99\u3059\u308b\u3060\u3051\u306e\u6a5f\u5668\u306f\u3001\u6a5f\u5668\u540c\u58eb\u304cIP\u30a2\u30c9\u30ec\u30b9\u3067\u76f4\u63a5\u3084\u308a\u53d6\u308a\u3059\u308b\u305f\u3081\u3001\u4eba\u9593\u304c\u540d\u524d\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044\u306e\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001DNS\u3078\u306e\u767b\u9332\u306f\u901a\u5e38\u884c\u3044\u307e\u305b\u3093\u3002\uff08\u203b\u7ba1\u7406\u76ee\u7684\u3067\u767b\u9332\u3059\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u3059\uff09<\/p>\n<h3>\u516c\u958b\u7cfb\uff08\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u30fbWeb\u30b5\u30fc\u30d0\uff09\u306e\u6a5f\u5668\u306f\u306a\u305cDNS\u767b\u9332\u304c\u5fc5\u9808\u306a\u306e\u304b\uff1f<\/h3>\n<p>\u4e00\u65b9\u3067\u3001Web\u30b5\u30a4\u30c8\u306e\u30b5\u30fc\u30d0\u30fc\u3084\u3001\u305d\u306e\u7a93\u53e3\u3068\u306a\u308b\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u3001\u30ea\u30d0\u30fc\u30b9\u30d7\u30ed\u30ad\u30b7\u306a\u3069\u306f\u3001\u4e0d\u7279\u5b9a\u591a\u6570\u306e\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u3092\u53d7\u3051\u4ed8\u3051\u307e\u3059\u3002\u30e6\u30fc\u30b6\u30fc\u306f<code>https:\/\/www.example.com\/<\/code>\u306e\u3088\u3046\u306bURL\uff08\u30c9\u30e1\u30a4\u30f3\u540d\uff09\u3092\u4f7f\u3063\u3066\u30a2\u30af\u30bb\u30b9\u3057\u3066\u304d\u307e\u3059\u3002\u3053\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u306b\u5bfe\u5fdc\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9\u3092\u30e6\u30fc\u30b6\u30fc\u306ePC\u306b\u6559\u3048\u308b\u305f\u3081\u306b\u3001DNS\u3078\u306e\u767b\u9332\u304c\u7d76\u5bfe\u306b\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3082\u3057DNS\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u306fIP\u30a2\u30c9\u30ec\u30b9\u3092\u76f4\u63a5\u30d6\u30e9\u30a6\u30b6\u306b\u5165\u529b\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u305a\u3001\u73fe\u5b9f\u7684\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h3>DNS\u767b\u9332\u5bfe\u8c61\u3068\u975e\u5bfe\u8c61\u306e\u307e\u3068\u3081\u4e00\u89a7\u8868<\/h3>\n<p>\u3053\u308c\u307e\u3067\u306e\u5185\u5bb9\u3092\u3001\u6a5f\u5668\u306e\u7a2e\u985e\u3054\u3068\u306b\u8868\u3067\u6574\u7406\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<table border=\"1\" style=\"width:100%; border-collapse: collapse;\">\n<thead>\n<tr>\n<th style=\"padding: 8px; background-color: #f2f2f2;\">DNS\u767b\u9332<\/th>\n<th style=\"padding: 8px; background-color: #f2f2f2;\">\u8a72\u5f53\u3059\u308b\u4e3b\u306a\u6a5f\u5668<\/th>\n<th style=\"padding: 8px; background-color: #f2f2f2;\">\u7406\u7531<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u539f\u5247\u3001\u5fc5\u9808<\/strong><\/td>\n<td style=\"padding: 8px;\">Web\u30b5\u30fc\u30d0\u3001\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u3001DNS\u30b5\u30fc\u30d0\u3001\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\uff08\u4eee\u60f3IP\uff09\u3001\u30ea\u30d0\u30fc\u30b9\u30d7\u30ed\u30ad\u30b7<\/td>\n<td style=\"padding: 8px;\">\u4e0d\u7279\u5b9a\u591a\u6570\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u300c\u540d\u524d\u300d\u3067\u30a2\u30af\u30bb\u30b9\u3057\u3066\u304f\u308b\u30b5\u30fc\u30d3\u30b9\u306e\u7a93\u53e3\u3068\u306a\u308b\u305f\u3081\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u539f\u5247\u3001\u4e0d\u8981<\/strong><\/td>\n<td style=\"padding: 8px;\">\u30eb\u30fc\u30bf\u30fc\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3001L2\/L3\u30b9\u30a4\u30c3\u30c1<\/td>\n<td style=\"padding: 8px;\">\u901a\u4fe1\u7d4c\u8def\u3092\u69cb\u6210\u3059\u308b\u6a5f\u5668\u3067\u3042\u308a\u3001\u6a5f\u5668\u9593\u306e\u901a\u4fe1\u306fIP\u30a2\u30c9\u30ec\u30b9\u3067\u884c\u308f\u308c\u308b\u305f\u3081\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u5834\u5408\u306b\u3088\u308b<\/strong><\/td>\n<td style=\"padding: 8px;\">\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u3001\u7ba1\u7406\u7528\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/td>\n<td style=\"padding: 8px;\">\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u8a2d\u5b9a\u3067\u540d\u524d\u6307\u5b9a\u304c\u4fbf\u5229\u306a\u5834\u5408\u3084\u3001\u7ba1\u7406\u8005\u304c\u540d\u524d\u3067\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3044\u5834\u5408\u306b\u767b\u9332\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>NAPT\u306e\u4ed5\u7d44\u307f\u3092ASCII\u56f3\u3067\u7406\u89e3\u3059\u308b\uff5c1\u3064\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP\u3092\u5171\u6709\u3067\u304d\u308b\u7406\u7531<\/h2>\n<p>NAPT\uff08Network Address Port Translation\uff09\u306f\u3001\u73fe\u4ee3\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u306b\u304a\u3044\u3066\u6700\u3082\u91cd\u8981\u306a\u6280\u8853\u306e\u4e00\u3064\u3067\u3059\u3002\u306a\u305c\u306a\u3089\u30011\u3064\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\u3055\u3048\u3042\u308c\u3070\u3001\u793e\u5185\u3084\u5bb6\u5ead\u5185\u306e\u591a\u6570\u306e\u7aef\u672b\uff08PC\u3084\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\uff09\u304c\u540c\u6642\u306b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u5229\u7528\u3067\u304d\u308b\u304b\u3089\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001NAPT\u304c\u3069\u306e\u3088\u3046\u306b\u3057\u3066\u305d\u308c\u3092\u5b9f\u73fe\u3057\u3066\u3044\u308b\u306e\u304b\u3001\u305d\u306e\u5fc3\u81d3\u90e8\u3067\u3042\u308b\u300c\u30dd\u30fc\u30c8\u756a\u53f7\u3092\u4f7f\u3063\u305f\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u8b58\u5225\u300d\u306e\u4ed5\u7d44\u307f\u3092\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>NAPT\u306e\u6982\u8981\uff1aIP\u30a2\u30c9\u30ec\u30b9\u3068\u30dd\u30fc\u30c8\u756a\u53f7\u306e\u5909\u63db<\/h3>\n<p>NAPT\u306e\u57fa\u672c\u52d5\u4f5c\u306f\u3001\u5185\u90e8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08LAN\uff09\u304b\u3089\u5916\u90e8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\uff09\u3078\u30d1\u30b1\u30c3\u30c8\u304c\u51fa\u3066\u3044\u304f\u969b\u306b\u3001<strong>\u9001\u4fe1\u5143\u306e\u300c\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9\uff0b\u30dd\u30fc\u30c8\u756a\u53f7\u300d\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u3001NAPT\u30eb\u30fc\u30bf\u30fc\u306e\u300c\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\uff0b\u5225\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u300d\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u66f8\u304d\u63db\u3048\u308b<\/strong>\u3053\u3068\u3067\u3059\u3002\u3053\u306e\u3068\u304d\u3001\u3069\u306e\u5185\u90e8\u7aef\u672b\u306e\u3069\u306e\u901a\u4fe1\u304c\u3001\u3069\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u306b\u5909\u63db\u3055\u308c\u305f\u304b\u3092\u300cNAPT\u30c6\u30fc\u30d6\u30eb\uff08\u5909\u63db\u30c6\u30fc\u30d6\u30eb\uff09\u300d\u306b\u8a18\u9332\u3057\u307e\u3059\u3002<\/p>\n<p>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304b\u3089\u5fdc\u7b54\u30d1\u30b1\u30c3\u30c8\u304c\u8fd4\u3063\u3066\u304f\u308b\u3068\u3001NAPT\u30eb\u30fc\u30bf\u30fc\u306fNAPT\u30c6\u30fc\u30d6\u30eb\u3092\u53c2\u7167\u3057\u3001\u5b9b\u5148\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u304b\u3089\u5143\u306e\u5185\u90e8\u7aef\u672b\u3092\u7279\u5b9a\u3057\u3066\u3001\u30d1\u30b1\u30c3\u30c8\u3092\u6b63\u78ba\u306b\u5c4a\u3051\u307e\u3059\u3002<\/p>\n<h3>\u30dd\u30fc\u30c8\u756a\u53f7\u3067\u901a\u4fe1\u3092\u8b58\u5225\u3059\u308b\u4ed5\u7d44\u307f<\/h3>\n<p>\u3082\u3057\u3001LAN\u5185\u306ePC-A\u3068PC-B\u304c\u540c\u6642\u306b\u540c\u3058Web\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3089\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\uff1f\u3069\u3061\u3089\u3082\u5b9b\u5148\u306f\u540c\u3058\u3067\u3059\u304c\u3001NAPT\u30eb\u30fc\u30bf\u30fc\u306f\u3053\u308c\u3089\u3092\u7570\u306a\u308b\u901a\u4fe1\u3068\u3057\u3066\u6b63\u3057\u304f\u8b58\u5225\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u79d8\u5bc6\u304c\u30dd\u30fc\u30c8\u756a\u53f7\u3067\u3059\u3002<\/p>\n<p>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\uff08PC\uff09\u304c\u901a\u4fe1\u3092\u958b\u59cb\u3059\u308b\u3068\u304d\u3001OS\u306f\u4e00\u6642\u7684\u306b\u4f7f\u7528\u3059\u308b\u30dd\u30fc\u30c8\u756a\u53f7\uff08\u30a8\u30d5\u30a7\u30e1\u30e9\u30eb\u30dd\u30fc\u30c8\uff09\u3092\u30e9\u30f3\u30c0\u30e0\u306b\u5272\u308a\u5f53\u3066\u307e\u3059\u3002PC-A\u3068PC-B\u3067\u306f\u3001\u3053\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u304c\u7570\u306a\u308b\u305f\u3081\u3001NAPT\u30eb\u30fc\u30bf\u30fc\u306f\u305d\u308c\u3089\u3092\u5225\u3005\u306e\u30bb\u30c3\u30b7\u30e7\u30f3\u3068\u3057\u3066\u7ba1\u7406\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n<h3>ASCII\u56f3\u3067\u7406\u89e3\u3059\u308bNAPT\u5909\u63db\u306e\u6d41\u308c<\/h3>\n<p>\u5177\u4f53\u7684\u306a\u5909\u63db\u306e\u6d41\u308c\u3092\u3001ASCII\u30a2\u30fc\u30c8\u3092\u4f7f\u3063\u305f\u56f3\u3067\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre style=\"background-color:#f0f0f0; padding:15px; border-radius:5px; font-family: 'Courier New', Courier, monospace; line-height: 1.4;\">\n\u3010LAN\u5185\u90e8\u3011                                 \u3010NAPT\u30eb\u30fc\u30bf\u30fc (203.0.113.1)\u3011                                \u3010\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3011\n\n[PC-A: 192.168.1.10]                         +-----------------------+                                [Web\u30b5\u30fc\u30d0]\n   |                                         |      NAPT\u30c6\u30fc\u30d6\u30eb     |                                    |\n   |---(1) \u9001\u4fe1\u5143:192.168.1.10:50001 ----->| | 192.168.1.10:50001 |---(2) \u9001\u4fe1\u5143:203.0.113.1:60001 --->|\n   |     \u5b9b\u5148  :198.51.100.50:443      | |  &lt;--&gt; 203.0.113.1:60001 |     \u5b9b\u5148  :198.51.100.50:443      |\n   |                                         |                       |                                    |\n[PC-B: 192.168.1.20]                         | 192.168.1.20:50002 |                                    |\n   |                                         |  &lt;--&gt; 203.0.113.1:60002 |                                    |\n   |---(3) \u9001\u4fe1\u5143:192.168.1.20:50002 ----->| +-----------------------+                                    |\n         \u5b9b\u5148  :198.51.100.50:443                                                                      |\n                                                                                                         |\n   |                                         |                       |                                    |\n   |&lt;---(5) \u5b9b\u5148  :192.168.1.10:50001 ------| | \u30c6\u30fc\u30d6\u30eb\u3092\u53c2\u7167\u3057\u3066\u5909\u63db |&lt;---(4) \u5b9b\u5148  :203.0.113.1:60001 ------|\n         \u9001\u4fe1\u5143:198.51.100.50:443                                                                      |\n<\/pre>\n<p><strong>\u3010\u901a\u4fe1\u306e\u6d41\u308c\u3011<\/strong><\/p>\n<ol>\n<li><strong>PC-A (192.168.1.10)<\/strong> \u304c\u3001\u9001\u4fe1\u5143\u30dd\u30fc\u30c8<code>50001<\/code>\u3067Web\u30b5\u30fc\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<\/li>\n<li>NAPT\u30eb\u30fc\u30bf\u30fc\u306f\u3001\u9001\u4fe1\u5143\u3092\u81ea\u8eab\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP <code>203.0.113.1<\/code> \u3068\u3001\u7a7a\u3044\u3066\u3044\u308b\u30dd\u30fc\u30c8<code>60001<\/code>\u306b\u5909\u63db\u3057\u3066\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u9001\u51fa\u3057\u307e\u3059\u3002\u3053\u306e\u5bfe\u5fdc\u95a2\u4fc2\u3092NAPT\u30c6\u30fc\u30d6\u30eb\u306b\u8a18\u9332\u3057\u307e\u3059\u3002<\/li>\n<li>\u307b\u307c\u540c\u6642\u306b\u3001<strong>PC-B (192.168.1.20)<\/strong> \u3082\u9001\u4fe1\u5143\u30dd\u30fc\u30c8<code>50002<\/code>\u3067\u540c\u3058Web\u30b5\u30fc\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<\/li>\n<li>NAPT\u30eb\u30fc\u30bf\u30fc\u306f\u3001\u540c\u69d8\u306b\u9001\u4fe1\u5143\u3092 <code>203.0.113.1:60002<\/code> \u306b\u5909\u63db\u3057\u3001\u30c6\u30fc\u30d6\u30eb\u306b\u8a18\u9332\u3057\u307e\u3059\u3002<\/li>\n<li>Web\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u5fdc\u7b54\u304c\u3001\u5b9b\u5148 <code>203.0.113.1:60001<\/code> \u3067\u30eb\u30fc\u30bf\u30fc\u306b\u5230\u7740\u3057\u307e\u3059\u3002\u30eb\u30fc\u30bf\u30fc\u306fNAPT\u30c6\u30fc\u30d6\u30eb\u3092\u898b\u3066\u3001\u3053\u308c\u304cPC-A\u304b\u3089\u306e\u901a\u4fe1\u306e\u623b\u308a\u30d1\u30b1\u30c3\u30c8\u3060\u3068\u5224\u65ad\u3057\u3001\u5b9b\u5148\u3092 <code>192.168.1.10:50001<\/code> \u306b\u66f8\u304d\u63db\u3048\u3066PC-A\u306b\u8ee2\u9001\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u30dd\u30fc\u30c8\u756a\u53f7\u3092\u5de7\u307f\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u305f\u3063\u305f\u4e00\u3064\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\u3067\u3082\u3001\u591a\u6570\u306e\u7aef\u672b\u304b\u3089\u306e\u901a\u4fe1\u3092\u6b63\u78ba\u306b\u634c\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002\u3053\u308c\u304cNAPT\u306e\u6839\u5e79\u3092\u306a\u3059\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n<h2>\u540c\u4e00\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u306eDNS\u306e\u8981\u5426\uff5c\u5bb6\u5ead\u30fb\u4f01\u696dLAN\u3067\u306e\u9055\u3044\u3068\u540d\u524d\u89e3\u6c7a\u306e\u4ed5\u7d44\u307f<\/h2>\n<p>\u300c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u304d\u306bDNS\u304c\u5fc5\u8981\u306a\u306e\u306f\u5206\u304b\u3063\u305f\u3002\u3067\u306f\u3001\u30d7\u30ea\u30f3\u30bf\u30fc\u3084\u30d5\u30a1\u30a4\u30eb\u30b5\u30fc\u30d0\u30fc\u306a\u3069\u3001\u540c\u3058LAN\u306e\u4e2d\u306b\u3042\u308b\u6a5f\u5668\u3068\u901a\u4fe1\u3059\u308b\u3068\u304d\u3082DNS\u306f\u5fc5\u8981\u306a\u306e\u304b\uff1f\u300d\u3053\u308c\u306f\u591a\u304f\u306e\u5b66\u7fd2\u8005\u304c\u62b1\u304f\u7591\u554f\u3067\u3059\u3002\u7d50\u8ad6\u304b\u3089\u8a00\u3046\u3068\u3001<strong>\u72b6\u6cc1\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u3001\u5bb6\u5ead\u74b0\u5883\u3068\u4f01\u696d\u74b0\u5883\u3067\u306f\u305d\u306e\u7b54\u3048\u304c\u5927\u304d\u304f\u5909\u308f\u308a\u307e\u3059\u3002<\/strong><\/p>\n<h3>\u539f\u5247\uff1a\u300c\u540d\u524d\u3067\u901a\u4fe1\u3059\u308b\u306a\u3089DNS\u304c\u5fc5\u8981\u3001IP\u76f4\u6307\u5b9a\u306a\u3089\u4e0d\u8981\u300d<\/h3>\n<p>\u3053\u3053\u3067\u3082\u57fa\u672c\u539f\u5247\u306f\u540c\u3058\u3067\u3059\u3002\u3042\u306a\u305f\u304c\u30d5\u30a1\u30a4\u30eb\u30b5\u30fc\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u3001<code>\\\\fileserver<\/code> \u306e\u3088\u3046\u306b\u300c\u540d\u524d\u300d\u3067\u6307\u5b9a\u3059\u308b\u306a\u3089\u3001\u305d\u306e\u540d\u524d\u3092IP\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3059\u308b\u4ed5\u7d44\u307f\u3001\u3064\u307e\u308aDNS\uff08\u3042\u308b\u3044\u306f\u305d\u308c\u306b\u4ee3\u308f\u308b\u540d\u524d\u89e3\u6c7a\u306e\u4ed5\u7d44\u307f\uff09\u304c\u5fc5\u8981\u3067\u3059\u3002\u4e00\u65b9\u3001<code>\\\\192.168.1.100<\/code> \u306e\u3088\u3046\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u76f4\u63a5\u6307\u5b9a\u3059\u308b\u306a\u3089\u3001\u540d\u524d\u89e3\u6c7a\u306f\u4e0d\u8981\u306a\u306e\u3067DNS\u3082\u4f7f\u308f\u308c\u307e\u305b\u3093\u3002<\/p>\n<h3>\u5bb6\u5eadLAN\u3067\u306fDNS\u306b\u4f9d\u5b58\u3057\u306a\u3044\u3053\u3068\u304c\u591a\u3044<\/h3>\n<p>\u5bb6\u5ead\u7528\u306e\u5c0f\u898f\u6a21\u306aLAN\u3067\u306f\u3001\u5404PC\u304cDNS\u30b5\u30fc\u30d0\u30fc\u3092\u7acb\u3066\u3066\u4e92\u3044\u306e\u540d\u524d\u3092\u767b\u9332\u3059\u308b\u3001\u3068\u3044\u3046\u3053\u3068\u306f\u307e\u305a\u3042\u308a\u307e\u305b\u3093\u3002\u3067\u306f\u3001\u306a\u305c\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u300d\u306e\u4e00\u89a7\u306b\u4ed6\u306ePC\u540d\u304c\u898b\u3048\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f\u3053\u308c\u306f\u3001DNS\u3068\u306f\u7570\u306a\u308b\u4ed5\u7d44\u307f\u304c\u50cd\u3044\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>ARP (Address Resolution Protocol)<\/strong>: IP\u30a2\u30c9\u30ec\u30b9\u304c\u5206\u304b\u3063\u3066\u3044\u308b\u76f8\u624b\u3068\u901a\u4fe1\u3059\u308b\u969b\u306b\u3001MAC\u30a2\u30c9\u30ec\u30b9\u3092\u554f\u3044\u5408\u308f\u305b\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002DNS\u306f\u95a2\u4fc2\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li><strong>NetBIOS over TCP\/IP, LLMNR, mDNS<\/strong>: \u3053\u308c\u3089\u306fDNS\u30b5\u30fc\u30d0\u30fc\u304c\u306a\u304f\u3066\u3082\u3001\u540c\u3058\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u6a5f\u5668\u540c\u58eb\u3067\u300c\u3053\u306e\u540d\u524d\u306ePC\u306f\u3069\u3053\uff1f\u300d\u3068\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\uff0f\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u3067\u554f\u3044\u5408\u308f\u305b\u3001\u540d\u524d\u89e3\u6c7a\u3092\u884c\u3046\u4ed5\u7d44\u307f\u3067\u3059\u3002Windows\u306e\u30d5\u30a1\u30a4\u30eb\u5171\u6709\u306a\u3069\u3067\u53e4\u304f\u304b\u3089\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u3064\u307e\u308a\u3001\u5bb6\u5eadLAN\u3067\u306fPC\u3084\u30d7\u30ea\u30f3\u30bf\u30fc\u306bIP\u30a2\u30c9\u30ec\u30b9\u3055\u3048\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308c\u3070\uff08\u901a\u5e38\u306fDHCP\u3067\u81ea\u52d5\u8a2d\u5b9a\uff09\u3001\u3053\u308c\u3089\u306e\u4ed5\u7d44\u307f\u306b\u3088\u3063\u3066\u5927\u62b5\u306e\u901a\u4fe1\u304c\u6210\u7acb\u3059\u308b\u305f\u3081\u3001DNS\u306e\u5fc5\u8981\u6027\u3092\u610f\u8b58\u3059\u308b\u5834\u9762\u306f\u307b\u3068\u3093\u3069\u306a\u3044\u306e\u3067\u3059\u3002<\/p>\n<h3>\u4f01\u696dLAN\uff08Active Directory\u74b0\u5883\uff09\u3067\u306fDNS\u304c\u5fc5\u9808<\/h3>\n<p>\u4e00\u65b9\u3001\u591a\u304f\u306e\u4f01\u696d\u3067\u5c0e\u5165\u3055\u308c\u3066\u3044\u308bActive Directory (AD) \u74b0\u5883\u3067\u306f\u3001\u8a71\u304c\u5168\u304f\u7570\u306a\u308a\u307e\u3059\u3002AD\u74b0\u5883\u306b\u304a\u3044\u3066\u3001DNS\u306f<strong>\u6975\u3081\u3066\u91cd\u8981\u306a\u5f79\u5272<\/strong>\u3092\u62c5\u3063\u3066\u304a\u308a\u3001\u5fc5\u9808\u306e\u5b58\u5728\u3067\u3059\u3002<\/p>\n<p>\u306a\u305c\u306a\u3089\u3001AD\u306b\u53c2\u52a0\u3057\u3066\u3044\u308b\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30fc\u3084\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u3092\u63a2\u3057\u305f\u308a\u3001\u5404\u7a2e\u30b5\u30fc\u30d3\u30b9\uff08\u30d5\u30a1\u30a4\u30eb\u5171\u6709\u3001\u8a8d\u8a3c\u306a\u3069\uff09\u306e\u5834\u6240\u3092\u7279\u5b9a\u3057\u305f\u308a\u3059\u308b\u305f\u3081\u306b\u3001\u3059\u3079\u3066DNS\u3092\u5229\u7528\u3059\u308b\u304b\u3089\u3067\u3059\u3002AD\u74b0\u5883\u3067\u306f\u3001\u7279\u5b9a\u306e\u547d\u540d\u898f\u5247\uff08\u4f8b\uff1a<code>PC01.corp.example.com<\/code>\uff09\u3067\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30fc\u540d\u304cDNS\u306b\u81ea\u52d5\u767b\u9332\u3055\u308c\u3001\u305f\u3068\u3048\u540c\u3058\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30b0\u30e1\u30f3\u30c8\u5185\u306b\u3042\u3063\u3066\u3082\u3001\u901a\u4fe1\u76f8\u624b\u3092\u63a2\u3059\u969b\u306b\u306f\u307e\u305aDNS\u306b\u554f\u3044\u5408\u308f\u305b\u308b\u306e\u304c\u57fa\u672c\u52d5\u4f5c\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u3010\u6bd4\u8f03\u8868\u3011\u74b0\u5883\u306b\u3088\u308b\u540d\u524d\u89e3\u6c7a\u306e\u5b9f\u904b\u7528\u306e\u9055\u3044<\/h3>\n<table border=\"1\" style=\"width:100%; border-collapse: collapse;\">\n<thead>\n<tr>\n<th style=\"padding: 8px; background-color: #f2f2f2;\">\u74b0\u5883<\/th>\n<th style=\"padding: 8px; background-color: #f2f2f2;\">\u4e3b\u306a\u540d\u524d\u89e3\u6c7a\u306e\u4ed5\u7d44\u307f<\/th>\n<th style=\"padding: 8px; background-color: #f2f2f2;\">\u540c\u4e00\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u306eDNS<\/th>\n<th style=\"padding: 8px; background-color: #f2f2f2;\">\u7279\u5fb4<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u5c0f\u898f\u6a21\u30fb\u5bb6\u5eadLAN<\/strong><\/td>\n<td style=\"padding: 8px;\">LLMNR, NetBIOS, mDNS<\/td>\n<td style=\"padding: 8px;\"><strong>\u539f\u5247\u3001\u4e0d\u8981<\/strong><\/td>\n<td style=\"padding: 8px;\">IP\u30a2\u30c9\u30ec\u30b9\u304c\u5206\u304b\u308c\u3070ARP\u3067\u901a\u4fe1\u53ef\u80fd\u3002\u540d\u524d\u3067\u306e\u30a2\u30af\u30bb\u30b9\u306f\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u7b49\u306b\u4f9d\u5b58\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u4f01\u696dLAN (AD\u74b0\u5883)<\/strong><\/td>\n<td style=\"padding: 8px;\"><strong>DNS<\/strong><\/td>\n<td style=\"padding: 8px;\"><strong>\u5fc5\u9808<\/strong><\/td>\n<td style=\"padding: 8px;\">\u30b5\u30fc\u30d3\u30b9\u306e\u5834\u6240\u691c\u7d22\u3084\u8a8d\u8a3c\u306a\u3069\u3001\u30c9\u30e1\u30a4\u30f3\u6a5f\u80fd\u306e\u6839\u5e79\u3092DNS\u304c\u652f\u3048\u3066\u3044\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u30af\u30e9\u30a6\u30c9 (VPC\/VNet)<\/strong><\/td>\n<td style=\"padding: 8px;\"><strong>DNS (\u30af\u30e9\u30a6\u30c9\u63d0\u4f9b)<\/strong><\/td>\n<td style=\"padding: 8px;\"><strong>\u307b\u307c\u5fc5\u9808<\/strong><\/td>\n<td style=\"padding: 8px;\">\u30af\u30e9\u30a6\u30c9\u5074\u304c\u63d0\u4f9b\u3059\u308b\u5185\u90e8DNS\u6a5f\u80fd\u306b\u3088\u308a\u3001\u4eee\u60f3\u30de\u30b7\u30f3\u540d\u3067\u306e\u901a\u4fe1\u304c\u6a19\u6e96\u3068\u306a\u3063\u3066\u3044\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u300c\u540c\u4e00\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u300d\u3068\u3044\u3046\u8a00\u8449\u3060\u3051\u3067\u306f\u3001DNS\u306e\u8981\u5426\u3092\u4e00\u6982\u306b\u5224\u65ad\u3067\u304d\u306a\u3044\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u3067\u306f\u3001\u7279\u306b\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u60f3\u5b9a\u3057\u305f\u554f\u984c\u304c\u591a\u3044\u305f\u3081\u3001\u300cActive Directory\u74b0\u5883\u3067\u306f\u3001\u305f\u3068\u3048\u540c\u4e00\u30bb\u30b0\u30e1\u30f3\u30c8\u5185\u3067\u3082\u540d\u524d\u3067\u306e\u901a\u4fe1\u306b\u306fDNS\u304c\u4f7f\u308f\u308c\u308b\u300d\u3068\u899a\u3048\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<h2>\u540c\u4e00\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306eDNS\u30b5\u30fc\u30d0\u306e\u52d5\u4f5c\uff5cARP\u3068\u540d\u524d\u89e3\u6c7a\u306e\u5f79\u5272\u5206\u62c5<\/h2>\n<p>\u524d\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u300c\u4f01\u696dLAN\u306a\u3069\u3067\u306f\u3001\u540c\u3058\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u3082DNS\u304c\u5fc5\u9808\u300d\u3068\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002\u3067\u306f\u3001\u3082\u3057\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3044\u30b5\u30fc\u30d0\u30fc\u3068\u3001\u305d\u306e\u540d\u524d\u3092\u89e3\u6c7a\u3059\u308bDNS\u30b5\u30fc\u30d0\u30fc\u304c\u3001\u81ea\u5206\u81ea\u8eab\uff08\u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC\uff09\u3068\u5168\u304f\u540c\u3058\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30b0\u30e1\u30f3\u30c8\u306b\u3042\u3063\u305f\u5834\u5408\u3001\u901a\u4fe1\u306f\u3069\u306e\u3088\u3046\u306a\u9806\u756a\u3067\u884c\u308f\u308c\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u300cDNS\u306e\u5f79\u5272\u300d\u3068\u300cARP\u306e\u5f79\u5272\u300d\u3092\u660e\u78ba\u306b\u533a\u5225\u3059\u308b\u3053\u3068\u304c\u9375\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>DNS\u3092\u4f7f\u3046\u5224\u65ad\u57fa\u6e96\u306f\u300c\u540d\u524d\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u304b\u300d\u3069\u3046\u304b\u3060\u3051<\/h3>\n<p>PC\u304c\u901a\u4fe1\u3092\u958b\u59cb\u3059\u308b\u969b\u3001OS\u306f\u307e\u305a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304b\u3089\u6e21\u3055\u308c\u305f\u5b9b\u5148\u304c\u300cIP\u30a2\u30c9\u30ec\u30b9\u300d\u306a\u306e\u304b\u300c\u540d\u524d\u300d\u306a\u306e\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002\u3053\u306e\u6700\u521d\u306e\u5224\u65ad\u304c\u3059\u3079\u3066\u3092\u6c7a\u3081\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>IP\u30a2\u30c9\u30ec\u30b9\u3067\u6307\u5b9a\u3057\u305f\u5834\u5408 (\u4f8b: <code>ping 192.168.1.50<\/code>)<\/strong><br \/>\n    OS\u306f\u300c\u5b9b\u5148IP\u30a2\u30c9\u30ec\u30b9\u304c\u65e2\u306b\u5206\u304b\u3063\u3066\u3044\u308b\u300d\u3068\u5224\u65ad\u3059\u308b\u305f\u3081\u3001\u540d\u524d\u89e3\u6c7a\u306e\u30b9\u30c6\u30c3\u30d7\u3092\u5b8c\u5168\u306b\u30b9\u30ad\u30c3\u30d7\u3057\u307e\u3059\u3002DNS\u30b5\u30fc\u30d0\u30fc\u306b\u554f\u3044\u5408\u308f\u305b\u308b\u3053\u3068\u306f\u4e00\u5207\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li><strong>\u540d\u524d\u3067\u6307\u5b9a\u3057\u305f\u5834\u5408 (\u4f8b: <code>ping web-server<\/code>)<\/strong><br \/>\n    OS\u306f\u300c\u5b9b\u5148\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u4e0d\u660e\u3060\u300d\u3068\u5224\u65ad\u3057\u3001IP\u30a2\u30c9\u30ec\u30b9\u3092\u8abf\u3079\u308b\u305f\u3081\u306b\u3001PC\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bDNS\u30b5\u30fc\u30d0\u30fc\u3078\u554f\u3044\u5408\u308f\u305b\u3092\u884c\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u91cd\u8981\u306a\u306e\u306f\u3001<strong>\u3053\u306e\u6bb5\u968e\u3067\u306fDNS\u30b5\u30fc\u30d0\u30fc\u304c\u3069\u3053\u306b\u3042\u308b\u304b\uff08\u540c\u3058\u90e8\u5c4b\u304b\u3001\u5730\u7403\u306e\u88cf\u5074\u304b\uff09\u306f\u5168\u304f\u95a2\u4fc2\u306a\u3044<\/strong>\u3068\u3044\u3046\u70b9\u3067\u3059\u3002PC\u306f\u305f\u3060\u3001\u8a2d\u5b9a\u3055\u308c\u305fDNS\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u5b9b\u306b\u300c\u3053\u306e\u540d\u524d\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u300d\u3068\u3044\u3046\u30d1\u30b1\u30c3\u30c8\u3092\u9001\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n<h3>DNS\u554f\u3044\u5408\u308f\u305b\u3068ARP\u306e\u9023\u643a\u30d7\u30ec\u30fc<\/h3>\n<p>\u3067\u306f\u3001\u540c\u3058\u30bb\u30b0\u30e1\u30f3\u30c8\u5185\uff08\u4f8b\uff1a<code>192.168.1.0\/24<\/code>\uff09\u306b\u3042\u308bDNS\u30b5\u30fc\u30d0\u30fc\uff08<code>192.168.1.10<\/code>\uff09\u306b\u554f\u3044\u5408\u308f\u305b\u308b\u5177\u4f53\u7684\u306a\u6d41\u308c\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u3053\u3053\u3067ARP\u304c\u767b\u5834\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u3010\u524d\u63d0\u3011<\/strong><\/p>\n<ul>\n<li>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC: <code>192.168.1.100<\/code><\/li>\n<li>DNS\u30b5\u30fc\u30d0\u30fc: <code>192.168.1.10<\/code><\/li>\n<li>\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3044Web\u30b5\u30fc\u30d0\u30fc\u540d: <code>web-server<\/code> (IP\u30a2\u30c9\u30ec\u30b9\u306f\u307e\u3060\u4e0d\u660e)<\/li>\n<\/ul>\n<p><strong>\u3010\u901a\u4fe1\u30b7\u30fc\u30b1\u30f3\u30b9\u3011<\/strong><\/p>\n<ol>\n<li><strong>\u540d\u524d\u89e3\u6c7a\u306e\u8981\u6c42<\/strong><br \/>\n    \u30e6\u30fc\u30b6\u30fc\u304c\u30d6\u30e9\u30a6\u30b6\u3067 <code>http:\/\/web-server\/<\/code> \u3092\u958b\u3053\u3046\u3068\u3057\u307e\u3059\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304b\u3089OS\u306b\u5bfe\u3057\u3001\u300c<code>web-server<\/code>\u3068\u901a\u4fe1\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u8981\u6c42\u304c\u51fa\u3055\u308c\u307e\u3059\u3002<\/li>\n<li><strong>DNS\u3078\u306e\u554f\u3044\u5408\u308f\u305b\u6c7a\u5b9a<\/strong><br \/>\n    OS\u306f\u5b9b\u5148\u304c\u540d\u524d\u306a\u306e\u3067\u3001\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bDNS\u30b5\u30fc\u30d0\u30fc\uff08<code>192.168.1.10<\/code>\uff09\u306b\u554f\u3044\u5408\u308f\u305b\u308b\u3053\u3068\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<li><strong>ARP\u306b\u3088\u308bMAC\u30a2\u30c9\u30ec\u30b9\u89e3\u6c7a (\u5bfeDNS\u30b5\u30fc\u30d0\u30fc)<\/strong><br \/>\n    OS\u306fDNS\u554f\u3044\u5408\u308f\u305b\u30d1\u30b1\u30c3\u30c8\u3092\u9001\u308b\u305f\u3081\u3001\u5b9b\u5148IP\u3092<code>192.168.1.10<\/code>\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u3053\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u81ea\u5206\u3068\u540c\u3058\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u3042\u308b\u305f\u3081\u3001OS\u306fARP\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u3001\u300c<code>192.168.1.10<\/code>\u306eMAC\u30a2\u30c9\u30ec\u30b9\u306f\u4f55\u3067\u3059\u304b\uff1f\u300d\u3068\u554f\u3044\u5408\u308f\u305b\u307e\u3059\u3002<\/li>\n<li><strong>DNS\u554f\u3044\u5408\u308f\u305b\u30d1\u30b1\u30c3\u30c8\u306e\u9001\u4fe1<\/strong><br \/>\n    DNS\u30b5\u30fc\u30d0\u30fc\u304b\u3089ARP\u5fdc\u7b54\u3067MAC\u30a2\u30c9\u30ec\u30b9\u304c\u8fd4\u3063\u3066\u304f\u308b\u3068\u3001PC\u306f\u3088\u3046\u3084\u304f\u5b9b\u5148MAC\u30a2\u30c9\u30ec\u30b9\u3092\u30bb\u30c3\u30c8\u3057\u3001DNS\u554f\u3044\u5408\u308f\u305b\u306e\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30d5\u30ec\u30fc\u30e0\u3092\u9001\u4fe1\u3067\u304d\u307e\u3059\u3002<\/li>\n<li><strong>DNS\u304b\u3089\u306e\u5fdc\u7b54<\/strong><br \/>\n    DNS\u30b5\u30fc\u30d0\u30fc\u306f\u554f\u3044\u5408\u308f\u305b\u3092\u53d7\u3051\u3001\u300c<code>web-server<\/code>\u306eIP\u30a2\u30c9\u30ec\u30b9\u306f<code>192.168.1.50<\/code>\u3067\u3059\u300d\u3068\u3044\u3046\u5fdc\u7b54\u30d1\u30b1\u30c3\u30c8\u3092PC\u306b\u8fd4\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u672c\u6765\u306e\u901a\u4fe1\u3092\u958b\u59cb (\u5bfeWeb\u30b5\u30fc\u30d0\u30fc)<\/strong><br \/>\n    \u3053\u308c\u3067\u3088\u3046\u3084\u304f\u3001PC\u306f\u30a2\u30af\u30bb\u30b9\u3057\u305f\u304b\u3063\u305fWeb\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\uff08<code>192.168.1.50<\/code>\uff09\u3092\u77e5\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u6b21\u306bPC\u306f\u3001Web\u30b5\u30fc\u30d0\u30fc\u5b9b\u306bHTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u3068\u304d\u3082\u5b9b\u5148IP <code>192.168.1.50<\/code> \u306eMAC\u30a2\u30c9\u30ec\u30b9\u3092\u77e5\u308b\u305f\u3081\u306b\u3001<strong>\u518d\u5ea6ARP\u306b\u3088\u308b\u554f\u3044\u5408\u308f\u305b<\/strong>\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001DNS\u306f\u3042\u304f\u307e\u3067\u30ec\u30a4\u30e4\u30fc7\uff08\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\uff09\u30ec\u30d9\u30eb\u3067\u300c\u540d\u524d\u304b\u3089IP\u30a2\u30c9\u30ec\u30b9\u3092\u5f15\u304f\u300d\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3059\u3002\u4e00\u65b9\u3001ARP\u306f\u30ec\u30a4\u30e4\u30fc2\u30ec\u30d9\u30eb\u3067\u300cIP\u30a2\u30c9\u30ec\u30b9\u304b\u3089MAC\u30a2\u30c9\u30ec\u30b9\u3092\u5f15\u304f\u300d\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3059\u3002\u305f\u3068\u3048DNS\u30b5\u30fc\u30d0\u30fc\u304c\u96a3\u306b\u3042\u3063\u3066\u3082\u3001\u540d\u524d\u3067\u901a\u4fe1\u3092\u958b\u59cb\u3059\u308b\u9650\u308a\u3001\u307e\u305aDNS\u3078\u306e\u554f\u3044\u5408\u308f\u305b\u304c\u767a\u751f\u3057\u3001\u305d\u306e\u300cDNS\u30b5\u30fc\u30d0\u30fc\u3068\u306e\u901a\u4fe1\u300d\u81ea\u4f53\u3092\u6210\u7acb\u3055\u305b\u308b\u305f\u3081\u306bARP\u304c\u4f7f\u308f\u308c\u308b\u3001\u3068\u3044\u3046\u4e8c\u6bb5\u69cb\u3048\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3059\u3002<\/p>\n<h2>\u7dcf\u307e\u3068\u3081\uff5c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u3054\u3068\u306eIP\u30a2\u30c9\u30ec\u30b9\u30fb\u5909\u63db\u30fbDNS\u5bfe\u5fdc\u65e9\u898b\u8868<\/h2>\n<p>\u3053\u308c\u307e\u3067\u306e\u89e3\u8aac\u306e\u7dcf\u4ed5\u4e0a\u3052\u3068\u3057\u3066\u3001\u4e3b\u8981\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u304c\u300cIP\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3064\u304b\u300d\u300cIP\u30a2\u30c9\u30ec\u30b9\u3092\u66f8\u304d\u63db\u3048\u308b\u304b\u300d\u300cDNS\u767b\u9332\u306f\u5fc5\u8981\u304b\u300d\u3068\u3044\u30463\u3064\u306e\u89b3\u70b9\u3067\u3069\u306e\u3088\u3046\u306b\u632f\u308b\u821e\u3046\u304b\u3092\u3001\u4e00\u89a7\u8868\u3068\u56f3\u89e3\u3067\u6574\u7406\u3057\u307e\u3059\u3002\u3053\u306e\u8868\u3092\u982d\u306b\u5165\u308c\u3066\u304a\u3051\u3070\u3001\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c\u306a\u3069\u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u69cb\u6210\u56f3\u304c\u51fa\u3066\u304d\u3066\u3082\u3001\u5404\u6a5f\u5668\u306e\u5f79\u5272\u3092\u5373\u5ea7\u306b\u898b\u629c\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u6a5f\u5668\u3054\u3068\u306e\u5f79\u5272\u3068\u8a2d\u5b9a\u65e9\u898b\u8868<\/h3>\n<table border=\"1\" style=\"width:100%; border-collapse: collapse;\">\n<thead style=\"background-color: #f2f2f2;\">\n<tr>\n<th style=\"padding: 8px;\">\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668<\/th>\n<th style=\"padding: 8px;\">IP\u30a2\u30c9\u30ec\u30b9\u306f<br \/>\u3042\u308b\u304b\uff1f<\/th>\n<th style=\"padding: 8px;\">IP\u30a2\u30c9\u30ec\u30b9\u3092<br \/>\u66f8\u304d\u63db\u3048\u308b\u304b\uff1f<\/th>\n<th style=\"padding: 8px;\">DNS\u767b\u9332\u306f<br \/>\u5fc5\u8981\u304b\uff1f<\/th>\n<th style=\"padding: 8px;\">\u4e3b\u306a\u5f79\u5272\u30fb\u30dd\u30a4\u30f3\u30c8<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u30eb\u30fc\u30bf\u30fc<\/strong><\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<br \/>(\u5404IF)<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2717<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2717<\/td>\n<td style=\"padding: 8px;\">\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9593\u306e\u7d4c\u8def\u5236\u5fa1\uff08\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\uff09\u3002\u901a\u4fe1\u3092\u4e2d\u7d99\u3059\u308b\u3060\u3051\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/strong><\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<br \/>(\u5404IF)<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u25b3<br \/>(NAT\u6a5f\u80fd)<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2717<\/td>\n<td style=\"padding: 8px;\">\u901a\u4fe1\u306e\u8a31\u53ef\uff0f\u62d2\u5426\uff08\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\uff09\u3002NAT\u6a5f\u80fd\u3092\u6301\u3064\u3053\u3068\u304c\u591a\u3044\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>NAPT\u30eb\u30fc\u30bf\u30fc<\/strong><\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<br \/>(\u5185\/\u5916)<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<br \/>(<strong>\u9001\u4fe1\u5143<\/strong>)<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2717<\/td>\n<td style=\"padding: 8px;\">\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u3068\u30b0\u30ed\u30fc\u30d0\u30ebIP\u3092\u76f8\u4e92\u5909\u63db\u3002LAN\u2192\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u306e\u8981\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5<\/strong><\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<br \/>(\u4eee\u60f3IP\/\u5b9fIP)<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<br \/>(<strong>\u5b9b\u5148<\/strong>)<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<\/td>\n<td style=\"padding: 8px;\">\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u901a\u4fe1\u3092\u5206\u6563\u3002\u30b5\u30fc\u30d3\u30b9\u306e\u7a93\u53e3\u3068\u3057\u3066DNS\u767b\u9332\u304c\u5fc5\u9808\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc<\/strong><\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<br \/>(<strong>\u9001\u4fe1\u5143<\/strong>)<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u25b3<br \/>(\u8a2d\u5b9a\u306b\u3088\u308b)<\/td>\n<td style=\"padding: 8px;\">\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u4ee3\u7406\u3067\u901a\u4fe1\u3002\u9001\u4fe1\u5143IP\u304c\u30d7\u30ed\u30ad\u30b7\u81ea\u8eab\u306b\u5909\u308f\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>Web\/AP\/DB\u30b5\u30fc\u30d0\u30fc<\/strong><\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2717<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<\/td>\n<td style=\"padding: 8px;\">\u30b5\u30fc\u30d3\u30b9\u63d0\u4f9b\u306e\u4e3b\u4f53\u3002\u540d\u524d\u3067\u30a2\u30af\u30bb\u30b9\u3055\u308c\u308b\u305f\u3081DNS\u767b\u9332\u304c\u5fc5\u9808\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>DNS\u30b5\u30fc\u30d0\u30fc<\/strong><\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2717<\/td>\n<td style=\"padding: 8px; text-align: center;\">\u2713<br \/>(\u81ea\u8eab\u3092\u767b\u9332)<\/td>\n<td style=\"padding: 8px;\">\u540d\u524d\u89e3\u6c7a\u30b5\u30fc\u30d3\u30b9\u3092\u63d0\u4f9b\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC\u304b\u3089\u53c2\u7167\u3055\u308c\u308b\u305f\u3081IP\u30a2\u30c9\u30ec\u30b9\u304c\u5fc5\u8981\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u56f3\u89e3\u3067\u6574\u7406\u3059\u308b\u901a\u4fe1\u7d4c\u8def\u3068\u5404\u6a5f\u5668\u306e\u5f79\u5272<\/h3>\n<p>\u5178\u578b\u7684\u306a\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u4f8b\u306b\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089Web\u30b5\u30fc\u30d0\u30fc\u307e\u3067\u306e\u901a\u4fe1\u7d4c\u8def\u4e0a\u3067\u5404\u6a5f\u5668\u304c\u3069\u306e\u3088\u3046\u306b\u95a2\u308f\u308b\u304b\u3092\u56f3\u3067\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre style=\"background-color:#f0f0f0; padding:15px; border-radius:5px; font-family: 'Courier New', Courier, monospace; line-height: 1.5;\">\n[\u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC]\n       |\n       | (1) DNS\u554f\u3044\u5408\u308f\u305b (www.example.com\u306f\uff1f)\n       v\n[\u5185\u90e8DNS\u30b5\u30fc\u30d0] --- IP\u30a2\u30c9\u30ec\u30b9(203.0.113.100)\u3092\u5fdc\u7b54\n       |\n       | (2) Web\u30a2\u30af\u30bb\u30b9 (\u5b9b\u5148: 203.0.113.100)\n       v\n[ (LAN) \u30b9\u30a4\u30c3\u30c1 ]\n       |\n       v\n[NAPT\u30eb\u30fc\u30bf\u30fc\/FW] -- (3) \u9001\u4fe1\u5143IP\u3092\u30b0\u30ed\u30fc\u30d0\u30ebIP\u306b\u5909\u63db\n       |\n       v\n================= \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 =================\n       |\n       v\n[\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5(VIP: 203.0.113.100)] -- (4) \u5b9b\u5148IP\u3092\u5b9f\u30b5\u30fc\u30d0IP(172.16.1.10)\u306b\u5909\u63db\n       |\n       v\n[Web\u30b5\u30fc\u30d01 (172.16.1.10)] --- \u5fdc\u7b54\u30d1\u30b1\u30c3\u30c8\u3092\u8fd4\u3059\n<\/pre>\n<p><strong>\u3010\u56f3\u89e3\u306e\u30dd\u30a4\u30f3\u30c8\u3011<\/strong><\/p>\n<ol>\n<li><strong>DNS\u89e3\u6c7a<\/strong>: \u901a\u4fe1\u306e\u59cb\u70b9\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u307e\u305a\u300c\u540d\u524d\u300d\u3092\u300cIP\u30a2\u30c9\u30ec\u30b9\u300d\u306b\u5909\u3048\u308b\u305f\u3081\u306bDNS\u30b5\u30fc\u30d0\u30fc\u3068\u901a\u4fe1\u3057\u307e\u3059\u3002<\/li>\n<li><strong>Web\u30a2\u30af\u30bb\u30b9\u958b\u59cb<\/strong>: IP\u30a2\u30c9\u30ec\u30b9\u304c\u5224\u660e\u3057\u3001\u5b9f\u969b\u306eWeb\u30b5\u30fc\u30d0\u30fc\uff08\u306e\u7a93\u53e3\u3067\u3042\u308b\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\uff09\u5b9b\u306b\u30d1\u30b1\u30c3\u30c8\u304c\u9001\u51fa\u3055\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u9001\u4fe1\u5143IP\u5909\u63db (NAPT)<\/strong>: \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u51fa\u308b\u76f4\u524d\u3001NAPT\u30eb\u30fc\u30bf\u30fc\u304c\u9001\u4fe1\u5143IP\u3092\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u304b\u3089\u30b0\u30ed\u30fc\u30d0\u30ebIP\u306b\u66f8\u304d\u63db\u3048\u307e\u3059\u3002<\/li>\n<li><strong>\u5b9b\u5148IP\u5909\u63db (\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5)<\/strong>: Web\u30b5\u30fc\u30d0\u30fc\u7fa4\u306e\u5165\u53e3\u3067\u3001\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u304c\u5b9b\u5148IP\u3092\u81ea\u8eab\u306e\u4eee\u60f3IP\u304b\u3089\u914d\u4e0b\u306b\u3042\u308b\u5b9f\u30b5\u30fc\u30d0\u30fc\u306eIP\u306b\u66f8\u304d\u63db\u3048\u307e\u3059\u3002<\/li>\n<\/ol>\n<h3>\u8a66\u9a13\u3067\u6df7\u4e71\u3057\u306a\u3044\u305f\u3081\u306e\u899a\u3048\u65b9<\/h3>\n<p>\u8907\u96d1\u306a\u69cb\u6210\u3067\u3082\u3001\u6b21\u306e3\u3064\u306e\u8996\u70b9\u3067\u6a5f\u5668\u3092\u5206\u985e\u3059\u308b\u3068\u3001\u5f79\u5272\u304c\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u901a\u4fe1\u306e\u300c\u7d4c\u8def\u300d\u3092\u4f5c\u308b\u6a5f\u5668 (\u30eb\u30fc\u30bf\u30fc\u3001FW)<\/strong>: IP\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3064\u304c\u3001\u57fa\u672c\u7684\u306b\u66f8\u304d\u63db\u3048\u305a\u3001DNS\u306b\u3082\u8f09\u3089\u306a\u3044\u3002\u300c\u4ea4\u901a\u6574\u7406\u54e1\u300d\u3068\u899a\u3048\u308b\u3002<\/li>\n<li><strong>\u901a\u4fe1\u306e\u300c\u4ee3\u7406\u4eba\u30fb\u7a93\u53e3\u300d\u3068\u306a\u308b\u6a5f\u5668 (NAPT\u3001\u30d7\u30ed\u30ad\u30b7\u3001LB)<\/strong>: IP\u30a2\u30c9\u30ec\u30b9\u3092\u7a4d\u6975\u7684\u306b\u66f8\u304d\u63db\u3048\u308b\u3002\u300c\u53d7\u4ed8\u4fc2\u300d\u3084\u300c\u5909\u8eab\uff08\u30de\u30b9\u30ab\u30ec\u30fc\u30c9\uff09\u3059\u308b\u30ad\u30e3\u30e9\u300d\u3068\u899a\u3048\u308b\u3002DNS\u306b\u8f09\u308b\u304b\u3069\u3046\u304b\u306f\u3001\u5916\u90e8\u304b\u3089\u76f4\u63a5\u6307\u540d\u3055\u308c\u308b\u7a93\u53e3\uff08LB\uff09\u304b\u3069\u3046\u304b\u3067\u5224\u65ad\u3059\u308b\u3002<\/li>\n<li><strong>\u901a\u4fe1\u306e\u300c\u76ee\u7684\u5730\u300d\u3068\u306a\u308b\u6a5f\u5668 (Web\u30b5\u30fc\u30d0\u30fc\u3001DNS\u30b5\u30fc\u30d0\u30fc)<\/strong>: \u30b5\u30fc\u30d3\u30b9\u3092\u63d0\u4f9b\u3059\u308b\u5927\u5143\u3002\u30e6\u30fc\u30b6\u30fc\u304c\u540d\u524d\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u3001\u5fc5\u305aDNS\u306b\u767b\u9332\u3055\u308c\u308b\u3002\u300c\u304a\u5e97\u300d\u305d\u306e\u3082\u306e\u3068\u899a\u3048\u308b\u3002<\/li>\n<\/ul>\n<p>\u3053\u306e\u5206\u985e\u3092\u610f\u8b58\u3059\u308b\u3060\u3051\u3067\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u7d4c\u8def\u554f\u984c\u306b\u5bfe\u3059\u308b\u898b\u901a\u3057\u304c\u683c\u6bb5\u306b\u826f\u304f\u306a\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n<h2>9. \u6a5f\u5668\u306bDNS\u8a2d\u5b9a\u3092\u3059\u308b\u3068\u306f\u4f55\u3092\u610f\u5473\u3059\u308b\u306e\u304b<\/h2>\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u3084\u30b5\u30fc\u30d0\u30fc\u306b\u300cDNS\u8a2d\u5b9a\u3092\u884c\u3046\u300d\u3068\u306f\u3001<strong>\u305d\u306e\u6a5f\u5668\u81ea\u8eab\u304c\u540d\u524d\uff08FQDN\uff09\u3092\u4f7f\u3063\u3066\u901a\u4fe1\u3092\u884c\u3046\u3068\u304d\u3001\u3069\u306eDNS\u30b5\u30fc\u30d0\u30fc\u306b\u554f\u3044\u5408\u308f\u305b\u308b\u304b\u3092\u6307\u5b9a\u3059\u308b\u8a2d\u5b9a<\/strong>\u306e\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002<br \/>\n\u3064\u307e\u308a\u300c\u3053\u306e\u30db\u30b9\u30c8\u540d\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u77e5\u308a\u305f\u3044\u300d\u3068\u304d\u306b\u3001\u3069\u306eDNS\u30b5\u30fc\u30d0\u30fc\u3078\u8cea\u554f\u3059\u308b\u304b\u3092\u6c7a\u3081\u308b\u64cd\u4f5c\u3067\u3059\u3002<\/p>\n<h3>DNS\u8a2d\u5b9a\u306e\u76ee\u7684<\/h3>\n<ul>\n<li><strong>PC\u30fb\u30b9\u30de\u30db\u306a\u3069\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u7aef\u672b\uff1a<\/strong> Web\u30b5\u30a4\u30c8\u306a\u3069FQDN\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u5fc5\u9808\u3002<\/li>\n<li><strong>\u30b5\u30fc\u30d0\u30fc\uff08Web\uff0f\u30e1\u30fc\u30eb\u306a\u3069\uff09\uff1a<\/strong> \u5916\u90e8\u30db\u30b9\u30c8\u3078\u306e\u63a5\u7d9a\u3084\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u53d6\u5f97\u306a\u3069\u3067\u540d\u524d\u89e3\u6c7a\u304c\u5fc5\u8981\u3002<\/li>\n<li><strong>\u30eb\u30fc\u30bf\u30fc\u30fb\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\uff1a<\/strong> FQDN\u30d9\u30fc\u30b9\u306e\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3084\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u901a\u4fe1\u3001NTP\u540c\u671f\u3067\u5229\u7528\u3002<\/li>\n<li><strong>\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u30fc\u30fb\u30d7\u30ed\u30ad\u30b7\uff1a<\/strong> \u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u30db\u30b9\u30c8\u540d\u3067\u6307\u5b9a\u3057\u3066\u3044\u308b\u5834\u5408\u306b\u5fc5\u8981\u3002<\/li>\n<li><strong>DNS\u30b5\u30fc\u30d0\u30fc\u81ea\u8eab\uff1a<\/strong> \u4e0a\u4f4dDNS\u3078\u306e\u554f\u3044\u5408\u308f\u305b\uff08\u30d5\u30a9\u30ef\u30fc\u30c0\u8a2d\u5b9a\uff09\u306b\u4f7f\u308f\u308c\u308b\u3002<\/li>\n<\/ul>\n<h3>\u8a2d\u5b9a\u306e\u5177\u4f53\u4f8b<\/h3>\n<h4>\u2460 \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u7aef\u672b\uff08Windows \/ Linux\uff09<\/h4>\n<ul>\n<li><strong>Windows\uff1a<\/strong> \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a &gt; TCP\/IP\u30d7\u30ed\u30d1\u30c6\u30a3 &gt; \u300cDNS\u30b5\u30fc\u30d0\u30fc\u306e\u30a2\u30c9\u30ec\u30b9\u300d\u306b <code>192.168.1.1<\/code> \u3084 <code>8.8.8.8<\/code> \u3092\u6307\u5b9a\u3002<\/li>\n<li><strong>Linux\uff1a<\/strong> <code>\/etc\/resolv.conf<\/code> \u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8f09\u3002\n<pre><code>nameserver 192.168.1.1\nnameserver 8.8.8.8<\/code><\/pre>\n<\/li>\n<\/ul>\n<h4>\u2461 \u30eb\u30fc\u30bf\u30fc\u3084\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306a\u3069\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668<\/h4>\n<p>CLI\u3084\u7ba1\u7406\u753b\u9762\u3067\u300cDNS\u30b5\u30fc\u30d0\u30fc\u8a2d\u5b9a\u300d\u9805\u76ee\u304c\u3042\u308a\u3001\u4f8b\u3048\u3070Cisco\u30eb\u30fc\u30bf\u30fc\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<pre><code>Router(config)# ip name-server 8.8.8.8\nRouter(config)# ip domain-lookup\n<\/code><\/pre>\n<p>\u3053\u308c\u306b\u3088\u308a\u30eb\u30fc\u30bf\u30fc\u81ea\u8eab\u304c\u300cntp.nict.jp\u300d\u306a\u3069\u30db\u30b9\u30c8\u540d\u3092\u89e3\u6c7a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h4>\u2462 DNS\u30b5\u30fc\u30d0\u30fc\u81ea\u8eab<\/h4>\n<p>DNS\u30b5\u30fc\u30d0\u30fc\u304c\u4e0a\u4f4dDNS\u306b\u554f\u3044\u5408\u308f\u305b\u308b\u305f\u3081\u306e\u300c\u30d5\u30a9\u30ef\u30fc\u30c0\u8a2d\u5b9a\u300d\u3092\u884c\u3046\u4f8b\uff08BIND\u306a\u3069\uff09\u3002<\/p>\n<pre><code>forwarders {\n  8.8.8.8;\n  1.1.1.1;\n};\n<\/code><\/pre>\n<h3>DNS\u8a2d\u5b9a\u304c\u5fc5\u8981\u306b\u306a\u308b\u4ee3\u8868\u7684\u306a\u30b1\u30fc\u30b9<\/h3>\n<ul>\n<li>OS\u3084\u6a5f\u5668\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u5148\u304c\u30db\u30b9\u30c8\u540d\u3067\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u5834\u5408<\/li>\n<li>syslog\u3084\u30af\u30e9\u30a6\u30c9\u9023\u643a\u306a\u3069\u3067\u9001\u4fe1\u5148\u304cFQDN\u6307\u5b9a\u306e\u5834\u5408<\/li>\n<li>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3084\u30d7\u30ed\u30ad\u30b7\u3067FQDN\u30d9\u30fc\u30b9\u306e\u30eb\u30fc\u30eb\u3092\u8a2d\u5b9a\u3059\u308b\u5834\u5408<\/li>\n<li>NTP\u30b5\u30fc\u30d0\u30fc\u3092\u300cntp.nict.jp\u300d\u306a\u3069\u30db\u30b9\u30c8\u540d\u3067\u6307\u5b9a\u3059\u308b\u5834\u5408<\/li>\n<li>\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u30fc\u306e\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u30db\u30b9\u30c8\u540d\u3067\u767b\u9332\u3057\u3066\u3044\u308b\u5834\u5408<\/li>\n<\/ul>\n<h3>DNS\u8a2d\u5b9a\u304c\u4e0d\u8981\u306a\u30b1\u30fc\u30b9<\/h3>\n<ul>\n<li>\u5b9b\u5148\u3092\u5e38\u306bIP\u30a2\u30c9\u30ec\u30b9\u3067\u76f4\u63a5\u6307\u5b9a\u3057\u3066\u3044\u308b\u5834\u5408<\/li>\n<li>\u9589\u57df\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306a\u3069\u3067\u540d\u524d\u89e3\u6c7a\u3092\u884c\u308f\u306a\u3044\u5834\u5408<\/li>\n<li>DHCP\u3067DNS\u8a2d\u5b9a\u3092\u81ea\u52d5\u53d6\u5f97\u3057\u3066\u3044\u308b\u5834\u5408\uff08\u624b\u52d5\u8a2d\u5b9a\u4e0d\u8981\uff09<\/li>\n<\/ul>\n<h3>\u307e\u3068\u3081<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u89b3\u70b9<\/th>\n<th>\u5185\u5bb9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u4f55\u3092\u3059\u308b\u304b<\/td>\n<td>\u540d\u524d\uff08FQDN\uff09\u3092IP\u306b\u5909\u63db\u3059\u308b\u305f\u3081\u306e\u554f\u3044\u5408\u308f\u305b\u5148DNS\u30b5\u30fc\u30d0\u30fc\u3092\u6307\u5b9a\u3059\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u3069\u3053\u306b\u8a2d\u5b9a\u3059\u308b\u304b<\/td>\n<td>\u6a5f\u5668\u306eTCP\/IP\u8a2d\u5b9a\u3001\u307e\u305f\u306fCLI\u3067\u300cDNS\u30b5\u30fc\u30d0\u30fc\u30a2\u30c9\u30ec\u30b9\u300d\u3092\u767b\u9332\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u4f55\u3092\u6307\u5b9a\u3059\u308b\u304b<\/td>\n<td>DNS\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\uff08\u4f8b\uff1a192.168.1.1\u30018.8.8.8\u306a\u3069\uff09\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u8a2d\u5b9a\u3057\u306a\u3044\u3068\u3069\u3046\u306a\u308b\u304b<\/td>\n<td>\u30db\u30b9\u30c8\u540d\u3084URL\u3067\u306e\u901a\u4fe1\u304c\u3067\u304d\u305a\u3001IP\u76f4\u6307\u5b9a\u3057\u304b\u901a\u3089\u306a\u3044\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u8981\u3059\u308b\u306b\uff1a<\/strong> \u6a5f\u5668\u306bDNS\u8a2d\u5b9a\u3092\u3059\u308b\u3068\u306f\u3001\u300c\u3053\u306e\u6a5f\u5668\u304c\u30db\u30b9\u30c8\u540d\u3067\u901a\u4fe1\u3059\u308b\u3068\u304d\u306b\u3001\u3069\u306eDNS\u30b5\u30fc\u30d0\u30fc\u306b\u554f\u3044\u5408\u308f\u305b\u308b\u304b\u300d\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u591a\u304f\u306e\u5834\u5408\u306f\u3001DNS\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3059\u308b\u64cd\u4f5c\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081\uff1aDNS\u30fbNAT\/NAPT\u306e\u5f79\u5272\u3092\u7406\u89e3\u3059\u308c\u3070\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u50cf\u304c\u898b\u3048\u308b<\/h2>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u3068IP\u30a2\u30c9\u30ec\u30b9\u3001\u305d\u3057\u3066DNS\u306e\u95a2\u4fc2\u6027\u306b\u3064\u3044\u3066\u3001\u69d8\u3005\u306a\u89d2\u5ea6\u304b\u3089\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u6700\u5f8c\u306b\u3001\u8907\u96d1\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u8996\u70b9\u30923\u3064\u306b\u307e\u3068\u3081\u3066\u632f\u308a\u8fd4\u308a\u307e\u3059\u3002<\/p>\n<p>\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306e\u3088\u3046\u306a\u30b7\u30ca\u30ea\u30aa\u554f\u984c\u3067\u901a\u4fe1\u7d4c\u8def\u3092\u8aad\u307f\u89e3\u304f\u969b\u3001\u3053\u306e3\u3064\u306e\u5f79\u5272\u5206\u62c5\u3092\u610f\u8b58\u3059\u308b\u3060\u3051\u3067\u3001\u30d1\u30b1\u30c3\u30c8\u306e\u52d5\u304d\u304c\u9a5a\u304f\u307b\u3069\u30af\u30ea\u30a2\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>DNS\u306e\u5f79\u5272 = \u300c\u540d\u524d\u89e3\u6c7a\u300d<\/strong><br \/>\n    \u901a\u4fe1\u306e\u7b2c\u4e00\u6b69\u306f\u3001\u591a\u304f\u306e\u5834\u5408\u300c\u540d\u524d\u300d\u304b\u3089\u59cb\u307e\u308a\u307e\u3059\u3002\u300c<code>www.example.com<\/code>\u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u4eba\u9593\u306e\u610f\u56f3\u3092\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u7406\u89e3\u3067\u304d\u308b\u300cIP\u30a2\u30c9\u30ec\u30b9\u300d\u306b\u7ffb\u8a33\u3059\u308b\u306e\u304cDNS\u306e\u4ed5\u4e8b\u3067\u3059\u3002DNS\u304c\u5fc5\u8981\u304b\u3069\u3046\u304b\u306f\u3001\u300c<strong>\u30e6\u30fc\u30b6\u30fc\u304c\u540d\u524d\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u304b\u3069\u3046\u304b<\/strong>\u300d\u3067\u6c7a\u307e\u308a\u307e\u3059\u3002<\/li>\n<li><strong>NAT\/NAPT\u30fb\u30d7\u30ed\u30ad\u30b7\u306e\u5f79\u5272 = \u300cIP\u30a2\u30c9\u30ec\u30b9\u5909\u63db\u300d<\/strong><br \/>\n    \u7279\u306bLAN\u3068\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u5883\u754c\u3067\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u306e\u66f8\u304d\u63db\u3048\u304c\u983b\u7e41\u306b\u884c\u308f\u308c\u307e\u3059\u3002\u5185\u90e8\u304b\u3089\u5916\u90e8\u3078\u51fa\u308b\u969b\u306e\u300c<strong>\u9001\u4fe1\u5143IP\u5909\u63db\uff08NAPT\u306a\u3069\uff09<\/strong>\u300d\u3068\u3001\u5916\u90e8\u304b\u3089\u5185\u90e8\u306e\u30b5\u30fc\u30d3\u30b9\u3078\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306e\u300c<strong>\u5b9b\u5148IP\u5909\u63db\uff08\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u306a\u3069\uff09<\/strong>\u300d\u306e2\u30d1\u30bf\u30fc\u30f3\u3092\u533a\u5225\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u30d1\u30b1\u30c3\u30c8\u306e\u30d8\u30c3\u30c0\u60c5\u5831\u304c\u52d5\u7684\u306b\u5909\u308f\u308b\u30dd\u30a4\u30f3\u30c8\u3092\u628a\u63e1\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<li><strong>\u30eb\u30fc\u30bf\u30fc\/FW\u306e\u5f79\u5272 = \u300c\u7d4c\u8def\u5236\u5fa1\u3068\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u300d<\/strong><br \/>\n    IP\u30a2\u30c9\u30ec\u30b9\u304c\u66f8\u304d\u63db\u3048\u3089\u308c\u306a\u3044\u7d4c\u8def\u4e0a\u3067\u306f\u3001\u30eb\u30fc\u30bf\u30fc\u3084\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u304c\u9ed9\u3005\u3068\u30d1\u30b1\u30c3\u30c8\u3092\u4e2d\u7d99\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5b88\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u901a\u4fe1\u306e\u300c<strong>\u4ea4\u901a\u6574\u7406\u54e1<\/strong>\u300d\u3067\u3042\u308a\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3084\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u30eb\u30fc\u30eb\u306b\u5f93\u3063\u3066\u3001\u30d1\u30b1\u30c3\u30c8\u3092\u6b21\u306b\u3069\u3053\u3078\u9001\u308b\u304b\u3001\u3042\u308b\u3044\u306f\u7834\u68c4\u3059\u308b\u304b\u3092\u5224\u65ad\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u306e3\u3064\u306e\u7570\u306a\u308b\u30ec\u30a4\u30e4\u30fc\u306e\u52d5\u4f5c\u304c\u7d44\u307f\u5408\u308f\u3055\u3063\u3066\u3001\u4e00\u3064\u306e\u901a\u4fe1\u304c\u6210\u308a\u7acb\u3063\u3066\u3044\u307e\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3084\u8a2d\u8a08\u3092\u884c\u3046\u969b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u5b9f\u52d9\u3067\u3082\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u901a\u4fe1\u3067\u304d\u306a\u3044\u6642\u3001\u307e\u305a\u4f55\u3092\u7591\u3046\u304b\uff1f<\/strong> \u2192 \u307e\u305a\u306f\u300c\u540d\u524d\u89e3\u6c7a\uff08DNS\uff09\u304c\u3067\u304d\u3066\u3044\u308b\u304b\u300d\u300c\u7d4c\u8def\uff08\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\uff09\u306f\u6b63\u3057\u3044\u304b\u300d\u300c\u9014\u4e2d\u3067\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\uff08FW\uff09\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u300d\u306e\u9806\u3067\u5207\u308a\u5206\u3051\u308b\u306e\u304c\u5b9a\u77f3\u3067\u3059\u3002<\/li>\n<p>  &#8211; <strong>\u3069\u3053\u3067IP\u30a2\u30c9\u30ec\u30b9\u304c\u5909\u308f\u308b\u306e\u304b\uff1f<\/strong> \u2192 \u69cb\u6210\u56f3\u3092\u898b\u305f\u3089\u3001NAPT\u30eb\u30fc\u30bf\u30fc\u3084\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u306a\u3069\u3001\u30a2\u30c9\u30ec\u30b9\u5909\u63db\u3092\u884c\u3046\u6a5f\u5668\u3092\u6700\u521d\u306b\u30de\u30fc\u30af\u3059\u308b\u3068\u3001\u901a\u4fe1\u306e\u5168\u4f53\u50cf\u3092\u8ffd\u3044\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<p>  &#8211; <strong>\u306a\u305c\u3053\u306e\u6a5f\u5668\u306fDNS\u306b\u767b\u9332\u3059\u308b\u306e\u304b\uff1f<\/strong> \u2192 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