{"id":2594,"date":"2024-11-15T13:12:15","date_gmt":"2024-11-15T04:12:15","guid":{"rendered":"https:\/\/open-insight.net\/intersect\/?post_type=column&p=2594"},"modified":"2025-06-10T14:29:41","modified_gmt":"2025-06-10T05:29:41","slug":"l2tp-2","status":"publish","type":"column","link":"https:\/\/open-insight.net\/intersect\/column\/l2tp-2\/","title":{"rendered":"\u30d3\u30b8\u30cd\u30b9\u6210\u9577\u306e\u305f\u3081\u306eL2TP\u6d3b\u7528\u6cd5\uff1a\u5b89\u5168\u3067\u52b9\u7387\u7684\u306aVPN\u63a5\u7d9a\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"\n

\u73fe\u4ee3\u306e\u30d3\u30b8\u30cd\u30b9\u74b0\u5883\u306b\u304a\u3044\u3066\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u52b9\u7387\u6027\u306f\u4f01\u696d\u306e\u6210\u9577\u306b\u6b20\u304b\u305b\u306a\u3044\u8981\u7d20\u3067\u3059\u3002\u7279\u306b\u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30af\u306e\u666e\u53ca\u306b\u4f34\u3044\u3001\u5b89\u5168\u306aVPN\u63a5\u7d9a\u306e\u91cd\u8981\u6027\u304c\u9ad8\u307e\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u3053\u3067\u6ce8\u76ee\u3055\u308c\u308b\u306e\u304c\u300cL2TP\uff08Layer 2 Tunneling Protocol\uff09\u300d\u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001L2TP\u306e\u57fa\u672c\u6982\u5ff5\u304b\u3089\u3001IPsec\u3068\u306e\u9023\u643a\u3001\u8a2d\u5b9a\u65b9\u6cd5\u3001\u6d3b\u7528\u4f8b\u307e\u3067\u3092\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3001\u30d3\u30b8\u30cd\u30b9\u30d1\u30fc\u30bd\u30f3\u304c\u7406\u89e3\u3057\u3084\u3059\u3044\u5f62\u3067\u304a\u4f1d\u3048\u3057\u307e\u3059\u3002L2TP\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5b89\u5168\u3067\u52b9\u7387\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u74b0\u5883\u3092\u69cb\u7bc9\u3057\u3001\u30d3\u30b8\u30cd\u30b9\u306e\u6210\u9577\u3092\u652f\u3048\u308b\u77e5\u8b58\u3092\u8eab\u306b\u3064\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

1. L2TP\u3068\u306f\u4f55\u304b<\/h2>\n\n\n\n

1.1 L2TP\u306e\u57fa\u672c\u6982\u5ff5<\/h3>\n\n\n\n

L2TP\uff08Layer 2 Tunneling Protocol\uff09\u306f\u3001\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3067\u306e\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u3092\u63d0\u4f9b\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u7d50\u3076\u305f\u3081\u306b\u30c7\u30fc\u30bf\u30d1\u30b1\u30c3\u30c8\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u3001\u5b89\u5168\u306b\u8ee2\u9001\u3059\u308b\u624b\u6bb5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002L2TP\u306f\u3001\u4e3b\u306bVPN\uff08Virtual Private Network\uff09\u63a5\u7d9a\u306b\u4f7f\u7528\u3055\u308c\u3001\u7279\u306b\u30ea\u30e2\u30fc\u30c8\u30e6\u30fc\u30b6\u30fc\u304c\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u3001\u305d\u306e\u5b89\u5168\u6027\u3068\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002 L2TP\u306f\u3001PPTP\uff08Point-to-Point Tunneling Protocol\uff09\u306b\u6bd4\u3079\u3066\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u9762\u3067\u5f37\u5316\u3055\u308c\u3066\u304a\u308a\u3001\u7279\u306bIPsec\uff08Internet Protocol Security\uff09\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u304c\u6697\u53f7\u5316\u3055\u308c\u3001\u5b89\u5168\u306a\u30c8\u30f3\u30cd\u30eb\u304c\u5f62\u6210\u3055\u308c\u308b\u305f\u3081\u3001\u4f01\u696d\u306e\u60c5\u5831\u304c\u5916\u90e8\u304b\u3089\u306e\u653b\u6483\u306b\u5bfe\u3057\u3066\u4fdd\u8b77\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

1.2 L2TP\u306e\u5229\u70b9\u3068\u6b20\u70b9<\/h3>\n\n\n\n

L2TP\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306b\u306f\u591a\u304f\u306e\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u5f37\u5316\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002IPsec\u3068\u306e\u9023\u643a\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u304c\u53ef\u80fd\u3068\u306a\u308a\u3001\u60c5\u5831\u6f0f\u6d29\u306e\u30ea\u30b9\u30af\u304c\u8efd\u6e1b\u3055\u308c\u307e\u3059\u3002\u307e\u305f\u3001L2TP\u306f\u3001\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u67d4\u8edf\u6027\u304c\u9ad8\u3044\u3068\u3044\u3046\u30e1\u30ea\u30c3\u30c8\u3082\u3042\u308a\u307e\u3059\u3002 \u3057\u304b\u3057\u3001L2TP\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u6b20\u70b9\u3082\u5b58\u5728\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u8a2d\u5b9a\u304c\u8907\u96d1\u3067\u3042\u308b\u305f\u3081\u3001\u7279\u306b\u6280\u8853\u7684\u306a\u77e5\u8b58\u304c\u4e0d\u8db3\u3057\u3066\u3044\u308b\u5834\u5408\u306b\u306f\u3001\u9069\u5207\u306a\u8a2d\u5b9a\u304c\u96e3\u3057\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001L2TP\/IPsec\u306e\u63a5\u7d9a\u306f\u3001PPTP\u306b\u6bd4\u3079\u3066\u901f\u5ea6\u304c\u9045\u304f\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u6697\u53f7\u5316\u51e6\u7406\u304c\u8ffd\u52a0\u3055\u308c\u308b\u305f\u3081\u3067\u3042\u308a\u3001\u30d3\u30b8\u30cd\u30b9\u74b0\u5883\u306b\u304a\u3044\u3066\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u6c42\u3081\u3089\u308c\u308b\u5834\u9762\u3067\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u3068\u306a\u308a\u5f97\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

2. L2TP\u3068IPsec\u306e\u95a2\u4fc2<\/h2>\n\n\n\n

2.1 IPsec\u3068\u306f\u4f55\u304b<\/h3>\n\n\n\n

IPsec\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30d7\u30ed\u30c8\u30b3\u30eb\uff08IP\uff09\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3059\u308b\u305f\u3081\u306b\u8a2d\u8a08\u3055\u308c\u305f\u30d7\u30ed\u30c8\u30b3\u30eb\u30b9\u30a4\u30fc\u30c8\u3067\u3059\u3002\u4e3b\u306b\u3001\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u3068\u8a8d\u8a3c\u3092\u63d0\u4f9b\u3057\u3001VPN\u306e\u69cb\u7bc9\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002IPsec\u306f\u3001L2TP\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u3053\u308c\u306b\u3088\u308a\u30c7\u30fc\u30bf\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u4e00\u5c64\u5f37\u5316\u3055\u308c\u307e\u3059\u3002 IPsec\u306f\u3001\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u30e2\u30fc\u30c9\u3068\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\u306e2\u3064\u306e\u52d5\u4f5c\u30e2\u30fc\u30c9\u3092\u6301\u3061\u3001\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u30e2\u30fc\u30c9\u3067\u306f\u3001\u30d1\u30b1\u30c3\u30c8\u5168\u4f53\u304c\u6697\u53f7\u5316\u3055\u308c\u3001\u9001\u4fe1\u3055\u308c\u308b\u305f\u3081\u3001\u5b89\u5168\u6027\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u3001L2TP\/IPsec\u306f\u3001\u5b89\u5168\u306aVPN\u63a5\u7d9a\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u975e\u5e38\u306b\u5f37\u529b\u306a\u7d44\u307f\u5408\u308f\u305b\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

2.2 L2TP\/IPsec\u306e\u52d5\u4f5c\u539f\u7406<\/h3>\n\n\n\n

L2TP\/IPsec\u306f\u3001L2TP\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4f7f\u7528\u3057\u3066\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u3092\u884c\u3044\u3001IPsec\u3092\u5229\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u30c7\u30fc\u30bf\u304cL2TP\u30c8\u30f3\u30cd\u30eb\u3092\u901a\u904e\u3059\u308b\u969b\u306b\u3001IPsec\u304c\u305d\u306e\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3057\u3001\u9001\u4fe1\u3057\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u304c\u7b2c\u4e09\u8005\u306b\u76d7\u8074\u3055\u308c\u308b\u30ea\u30b9\u30af\u304c\u5927\u5e45\u306b\u6e1b\u5c11\u3057\u307e\u3059\u3002 L2TP\/IPsec\u306e\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u307e\u305aL2TP\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u958b\u59cb\u3057\u3001\u305d\u306e\u5f8c\u306bIPsec\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u78ba\u7acb\u3057\u307e\u3059\u3002\u3053\u306e\u4e8c\u6bb5\u968e\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u3088\u308a\u3001\u30c8\u30f3\u30cd\u30eb\u306e\u5b89\u5168\u6027\u304c\u4fdd\u8a3c\u3055\u308c\u3001\u30c7\u30fc\u30bf\u304c\u5b89\u5168\u306b\u8ee2\u9001\u3055\u308c\u308b\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002 \u4ee5\u4e0a\u306e\u3088\u3046\u306b\u3001L2TP\u3068IPsec\u306e\u95a2\u4fc2\u306f\u3001\u30d3\u30b8\u30cd\u30b9\u306e\u6210\u9577\u306b\u4e0d\u53ef\u6b20\u306a\u5b89\u5168\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u74b0\u5883\u306e\u69cb\u7bc9\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u3066\u3044\u307e\u3059\u3002\u4f01\u696d\u306f\u3001L2TP\/IPsec\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30af\u3084\u62e0\u70b9\u9593\u63a5\u7d9a\u306b\u304a\u3044\u3066\u3082\u3001\u5b89\u5fc3\u3057\u3066\u30c7\u30fc\u30bf\u901a\u4fe1\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

3. L2TP\u63a5\u7d9a\u306e\u30e1\u30ea\u30c3\u30c8<\/h2>\n\n\n\n

3.1 \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5f37\u5316<\/h3>\n\n\n\n

L2TP\uff08Layer 2 Tunneling Protocol\uff09\u306f\u3001\u305d\u306e\u7279\u6027\u306b\u3088\u308a\u3001\u30d3\u30b8\u30cd\u30b9\u74b0\u5883\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u9ad8\u3044\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u7279\u306b\u3001L2TP\u306fIPsec\uff08Internet Protocol Security\uff09\u3068\u9023\u643a\u3059\u308b\u3053\u3068\u3067\u3001\u5f37\u529b\u306a\u6697\u53f7\u5316\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u306f\u5b89\u5168\u306a\u30c8\u30f3\u30cd\u30eb\u3092\u901a\u3058\u3066\u9001\u4fe1\u3055\u308c\u3001\u5916\u90e8\u304b\u3089\u306e\u653b\u6483\u3084\u60c5\u5831\u6f0f\u6d29\u306e\u30ea\u30b9\u30af\u304c\u5927\u5e45\u306b\u6e1b\u5c11\u3057\u307e\u3059\u3002 \u4f01\u696d\u304c\u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30af\u3092\u5c0e\u5165\u3059\u308b\u969b\u3001\u5f93\u696d\u54e1\u304c\u793e\u5185\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u306e\u5b89\u5168\u306a\u624b\u6bb5\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002L2TP\/IPsec\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u540d\u3084\u30d1\u30b9\u30ef\u30fc\u30c9\u306a\u3069\u306e\u8a8d\u8a3c\u60c5\u5831\u304c\u6697\u53f7\u5316\u3055\u308c\u3001\u7b2c\u4e09\u8005\u306b\u53d6\u5f97\u3055\u308c\u308b\u5371\u967a\u3092\u8efd\u6e1b\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3001L2TP\u306f\u30d3\u30b8\u30cd\u30b9\u306e\u6210\u9577\u3092\u652f\u3048\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u57fa\u76e4\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

3.2 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u67d4\u8edf\u6027<\/h3>\n\n\n\n

L2TP\u306e\u3082\u3046\u4e00\u3064\u306e\u5927\u304d\u306a\u30e1\u30ea\u30c3\u30c8\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u67d4\u8edf\u6027\u3067\u3059\u3002L2TP\u306f\u3001\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001\u4f01\u696d\u306e\u30cb\u30fc\u30ba\u306b\u5fdc\u3058\u3066\u67d4\u8edf\u306b\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u7570\u306a\u308b\u62e0\u70b9\u3084\u30e6\u30fc\u30b6\u30fc\u304c\u540c\u3058VPN\u74b0\u5883\u3067\u63a5\u7d9a\u3067\u304d\u308b\u305f\u3081\u3001\u30d3\u30b8\u30cd\u30b9\u306e\u751f\u7523\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002 \u305f\u3068\u3048\u3070\u3001L2TP\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30ea\u30e2\u30fc\u30c8\u306e\u5f93\u696d\u54e1\u304c\u81ea\u5b85\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u3092\u4ecb\u3057\u3066\u793e\u5185\u306e\u30ea\u30bd\u30fc\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u67d4\u8edf\u6027\u306f\u3001\u7279\u306b\u30b0\u30ed\u30fc\u30d0\u30eb\u306b\u5c55\u958b\u3057\u3066\u3044\u308b\u4f01\u696d\u306b\u3068\u3063\u3066\u91cd\u8981\u3067\u3042\u308a\u3001\u5404\u62e0\u70b9\u9593\u3067\u306e\u30c7\u30fc\u30bf\u306e\u5171\u6709\u3084\u9023\u643a\u304c\u5186\u6ed1\u306b\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

4. L2TP\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h2>\n\n\n\n

4.1 Windows\u306b\u304a\u3051\u308b\u8a2d\u5b9a\u624b\u9806<\/h3>\n\n\n\n

L2TP\/IPsec\u3092Windows\u74b0\u5883\u3067\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306e\u624b\u9806\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002\u3053\u306e\u624b\u9806\u3092\u8e0f\u3080\u3053\u3068\u3067\u3001\u30ea\u30e2\u30fc\u30c8\u30e6\u30fc\u30b6\u30fc\u304c\u5b89\u5168\u306bVPN\u63a5\u7d9a\u3092\u78ba\u7acb\u3067\u304d\u307e\u3059\u3002 1. VPN\u63a5\u7d9a\u306e\u8ffd\u52a0<\/strong>: \u300c\u8a2d\u5b9a\u300d\u2192\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u300d\u2192\u300cVPN\u300d\u304b\u3089\u300cVPN\u63a5\u7d9a\u3092\u8ffd\u52a0\u300d\u3092\u9078\u629e\u3057\u307e\u3059\u3002 2. \u63a5\u7d9a\u306e\u8a73\u7d30\u5165\u529b<\/strong>: \u300cVPN\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u300d\u3068\u3057\u3066\u300cWindows\uff08\u5185\u8535\uff09\u300d\u3092\u9078\u629e\u3057\u3001\u63a5\u7d9a\u540d\u3084\u30b5\u30fc\u30d0\u30fc\u540d\u3001VPN\u30bf\u30a4\u30d7\u3068\u3057\u3066\u300cL2TP\/IPsec\u300d\u3092\u9078\u629e\u3057\u307e\u3059\u3002 3. \u8a8d\u8a3c\u60c5\u5831\u306e\u8a2d\u5b9a<\/strong>: \u30e6\u30fc\u30b6\u30fc\u540d\u3068\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u5165\u529b\u3057\u3001\u300c\u63a5\u7d9a\u300d\u3092\u9078\u629e\u3057\u307e\u3059\u3002 4. IPsec\u306e\u8a2d\u5b9a<\/strong>: \u8a73\u7d30\u8a2d\u5b9a\u3067\u300c\u4e8b\u524d\u5171\u6709\u30ad\u30fc\u300d\u3092\u5165\u529b\u3057\u3001\u63a5\u7d9a\u5148\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3057\u307e\u3059\u3002 \u3053\u308c\u3089\u306e\u624b\u9806\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u3001L2TP\/IPsec\u63a5\u7d9a\u304c\u78ba\u7acb\u3055\u308c\u3001\u30ea\u30e2\u30fc\u30c8\u30e6\u30fc\u30b6\u30fc\u306f\u793e\u5185\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u5b89\u5168\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

4.2 \u30eb\u30fc\u30bf\u30fc\u3067\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h3>\n\n\n\n

\u6b21\u306b\u3001L2TP\/IPsec\u3092\u30eb\u30fc\u30bf\u30fc\u3067\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u4f01\u696d\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3044\u3066\u3001\u30eb\u30fc\u30bf\u30fc\u306e\u8a2d\u5b9a\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002 1. \u30eb\u30fc\u30bf\u30fc\u306e\u7ba1\u7406\u753b\u9762\u306b\u30a2\u30af\u30bb\u30b9<\/strong>: \u30d6\u30e9\u30a6\u30b6\u3092\u4f7f\u7528\u3057\u3066\u30eb\u30fc\u30bf\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u3001\u7ba1\u7406\u753b\u9762\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u307e\u3059\u3002 2. VPN\u8a2d\u5b9a\u3092\u9078\u629e<\/strong>: \u300cVPN\u300d\u307e\u305f\u306f\u300c\u4eee\u60f3\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u300d\u30bb\u30af\u30b7\u30e7\u30f3\u3092\u898b\u3064\u3051\u307e\u3059\u3002 3. L2TP\/IPsec\u306e\u8a2d\u5b9a<\/strong>: L2TP\/IPsec\u63a5\u7d9a\u306e\u8a2d\u5b9a\u3092\u884c\u3044\u3001\u4e8b\u524d\u5171\u6709\u30ad\u30fc\u3084\u63a5\u7d9a\u5148\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u307e\u3059\u3002 4. \u30e6\u30fc\u30b6\u30fc\u30a2\u30ab\u30a6\u30f3\u30c8\u306e\u8a2d\u5b9a<\/strong>: VPN\u63a5\u7d9a\u3092\u884c\u3046\u30e6\u30fc\u30b6\u30fc\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u4f5c\u6210\u3057\u3001\u5fc5\u8981\u306a\u8a8d\u8a3c\u60c5\u5831\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002 \u3053\u308c\u306b\u3088\u308a\u3001\u4f01\u696d\u306e\u30eb\u30fc\u30bf\u30fc\u3092\u4ecb\u3057\u3066L2TP\/IPsec\u63a5\u7d9a\u304c\u78ba\u7acb\u3055\u308c\u3001\u8907\u6570\u306e\u30ea\u30e2\u30fc\u30c8\u30e6\u30fc\u30b6\u30fc\u304c\u793e\u5185\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

5. L2TP\/IPsec\u306e\u30c7\u30e1\u30ea\u30c3\u30c8<\/h2>\n\n\n\n

5.1 \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u5f71\u97ff<\/h3>\n\n\n\n

L2TP\/IPsec\u306f\u3001\u305d\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u9ad8\u3055\u3086\u3048\u306b\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u6697\u53f7\u5316\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u901a\u4fe1\u306e\u901f\u5ea6\u304c\u9045\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u7279\u306b\u5927\u5bb9\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u30d3\u30b8\u30cd\u30b9\u74b0\u5883\u306b\u304a\u3044\u3066\u306f\u3001\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002 \u307e\u305f\u3001L2TP\u81ea\u4f53\u3082\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u3057\u3066\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u3042\u308b\u305f\u3081\u3001\u901a\u4fe1\u304c\u9045\u5ef6\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u30d3\u30b8\u30cd\u30b9\u306b\u304a\u3044\u3066\u306f\u3001L2TP\/IPsec\u306e\u5c0e\u5165\u3092\u691c\u8a0e\u3059\u308b\u969b\u306b\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n

5.2 \u4e92\u63db\u6027\u306e\u554f\u984c<\/h3>\n\n\n\n

L2TP\/IPsec\u306f\u3001\u53e4\u3044\u6a5f\u5668\u3084\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3068\u306e\u4e92\u63db\u6027\u306b\u554f\u984c\u304c\u3042\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u3001L2TP\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u306a\u3044\u53e4\u3044\u30eb\u30fc\u30bf\u30fc\u3084\u30c7\u30d0\u30a4\u30b9\u304c\u5b58\u5728\u3059\u308b\u305f\u3081\u3001\u3059\u3079\u3066\u306e\u74b0\u5883\u3067\u30b9\u30e0\u30fc\u30ba\u306b\u52d5\u4f5c\u3059\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u306e\u305f\u3081\u3001\u5c0e\u5165\u3092\u691c\u8a0e\u3059\u308b\u969b\u306b\u306f\u3001\u65e2\u5b58\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u74b0\u5883\u3068\u306e\u6574\u5408\u6027\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002 \u307e\u305f\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3084NAT\uff08Network Address Translation\uff09\u306e\u8a2d\u5b9a\u306b\u3088\u3063\u3066\u306f\u3001L2TP\u63a5\u7d9a\u304c\u59a8\u3052\u3089\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u9069\u5207\u306a\u8a2d\u5b9a\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

6. L2TP\u306e\u6d3b\u7528\u30b7\u30fc\u30f3<\/h2>\n\n\n\n

6.1 \u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30af\u3067\u306e\u6d3b\u7528<\/h3>\n\n\n\n

L2TP\u306f\u3001\u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30af\u306e\u5b9f\u73fe\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u52b9\u679c\u7684\u3067\u3059\u3002\u5f93\u696d\u54e1\u304c\u81ea\u5b85\u3084\u5916\u51fa\u5148\u304b\u3089\u4f01\u696d\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u3001L2TP\/IPsec\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5b89\u5168\u306b\u30c7\u30fc\u30bf\u3092\u3084\u308a\u53d6\u308a\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u74b0\u5883\u3092\u6574\u3048\u308b\u3053\u3068\u3067\u3001\u4f01\u696d\u306f\u67d4\u8edf\u306a\u50cd\u304d\u65b9\u3092\u652f\u63f4\u3057\u3001\u751f\u7523\u6027\u306e\u5411\u4e0a\u3092\u56f3\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002 \u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30af\u3092\u884c\u3046\u969b\u306b\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u78ba\u4fdd\u304c\u6700\u3082\u91cd\u8981\u3067\u3059\u3002L2TP\/IPsec\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u3084\u8a8d\u8a3c\u304c\u884c\u308f\u308c\u3001\u5b89\u5fc3\u3057\u3066\u696d\u52d9\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

6.2 \u62e0\u70b9\u9593\u63a5\u7d9a\u306e\u4e8b\u4f8b<\/h3>\n\n\n\n

L2TP\u306f\u3001\u62e0\u70b9\u9593\u63a5\u7d9a\u306b\u304a\u3044\u3066\u3082\u6709\u52b9\u3067\u3059\u3002\u8907\u6570\u306e\u30aa\u30d5\u30a3\u30b9\u304c\u7570\u306a\u308b\u5834\u6240\u306b\u3042\u308b\u4f01\u696d\u306b\u304a\u3044\u3066\u3001L2TP\/IPsec\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5404\u62e0\u70b9\u9593\u3067\u5b89\u5168\u306b\u30c7\u30fc\u30bf\u3092\u5171\u6709\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4f01\u696d\u5185\u306e\u60c5\u5831\u306e\u6d41\u901a\u304c\u5186\u6ed1\u306b\u306a\u308a\u3001\u696d\u52d9\u52b9\u7387\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002 \u4f8b\u3048\u3070\u3001\u55b6\u696d\u90e8\u9580\u304c\u672c\u793e\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u3001L2TP\/IPsec\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5916\u90e8\u304b\u3089\u5b89\u5168\u306b\u793e\u5185\u30ea\u30bd\u30fc\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3001L2TP\u306f\u4f01\u696d\u306e\u5404\u62e0\u70b9\u3092\u3064\u306a\u3050\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002 \u4ee5\u4e0a\u304c\u3001L2TP\u63a5\u7d9a\u306e\u30e1\u30ea\u30c3\u30c8\u3001\u8a2d\u5b9a\u65b9\u6cd5\u3001\u30c7\u30e1\u30ea\u30c3\u30c8\u3001\u6d3b\u7528\u30b7\u30fc\u30f3\u306b\u3064\u3044\u3066\u306e\u89e3\u8aac\u3067\u3059\u3002L2TP\/IPsec\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30d3\u30b8\u30cd\u30b9\u306e\u6210\u9577\u3092\u652f\u3048\u308b\u5b89\u5168\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u74b0\u5883\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

7. L2TP\/IPsec\u3068\u4ed6\u306eVPN\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u6bd4\u8f03<\/h2>\n\n\n\n

7.1 PPTP\u3068\u306e\u9055\u3044<\/h3>\n\n\n\n

L2TP\uff08Layer 2 Tunneling Protocol\uff09\u3068PPTP\uff08Point-to-Point Tunneling Protocol\uff09\u306f\u3001\u3069\u3061\u3089\u3082\u5e83\u304f\u4f7f\u7528\u3055\u308c\u308bVPN\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u304c\u3001\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u89b3\u70b9\u304b\u3089\u898b\u308b\u3068\u3001L2TP\u306fIPsec\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3055\u308c\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u3068\u8a8d\u8a3c\u304c\u5f37\u5316\u3055\u308c\u307e\u3059\u3002\u4e00\u65b9\u3001PPTP\u306f\u57fa\u672c\u7684\u306a\u6697\u53f7\u5316\u3092\u63d0\u4f9b\u3057\u307e\u3059\u304c\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u6bd4\u8f03\u7684\u5f31\u304f\u3001\u60aa\u7528\u3055\u308c\u308b\u30ea\u30b9\u30af\u304c\u9ad8\u3044\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002 \u6b21\u306b\u3001\u63a5\u7d9a\u306e\u5b89\u5b9a\u6027\u3084\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u89b3\u70b9\u3067\u306f\u3001L2TP\/IPsec\u306f\u3001\u6697\u53f7\u5316\u51e6\u7406\u306e\u305f\u3081\u306b\u3084\u3084\u9045\u5ef6\u304c\u751f\u3058\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u9ad8\u3044\u5206\u3001\u30d3\u30b8\u30cd\u30b9\u7528\u9014\u3067\u306f\u3088\u308a\u4fe1\u983c\u6027\u304c\u3042\u308a\u307e\u3059\u3002PPTP\u306f\u3001\u8a2d\u5b9a\u304c\u7c21\u5358\u3067\u63a5\u7d9a\u304c\u901f\u3044\u3068\u3044\u3046\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u5206\u3001\u5b89\u5168\u6027\u304c\u72a0\u7272\u306b\u306a\u308b\u305f\u3081\u3001\u6a5f\u5bc6\u60c5\u5831\u3092\u6271\u3046\u30d3\u30b8\u30cd\u30b9\u306b\u306f\u9069\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n\n\n\n

7.2 IKEv2\u3068\u306e\u6bd4\u8f03<\/h3>\n\n\n\n

IKEv2\uff08Internet Key Exchange version 2\uff09\u306f\u3001L2TP\/IPsec\u3068\u540c\u69d8\u306b\u5b89\u5168\u306aVPN\u63a5\u7d9a\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002IKEv2\u306f\u3001\u7279\u306b\u30e2\u30d0\u30a4\u30eb\u30c7\u30d0\u30a4\u30b9\u306b\u304a\u3044\u3066\u63a5\u7d9a\u306e\u518d\u78ba\u7acb\u304c\u5bb9\u6613\u3067\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u5207\u308a\u66ff\u3048\uff08Wi-Fi\u304b\u3089\u30e2\u30d0\u30a4\u30eb\u30c7\u30fc\u30bf\u3078\u306e\u79fb\u884c\u306a\u3069\uff09\u306b\u5f37\u3044\u3068\u3044\u3046\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u5bfe\u3057\u3066\u3001L2TP\/IPsec\u306f\u3001\u63a5\u7d9a\u304c\u5207\u308c\u308b\u3068\u518d\u63a5\u7d9a\u304c\u3084\u3084\u8907\u96d1\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002 \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u9762\u3067\u306f\u3001IKEv2\u3082IPsec\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3059\u308b\u305f\u3081\u3001\u9ad8\u3044\u5b89\u5168\u6027\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001L2TP\/IPsec\u3068\u6bd4\u8f03\u3059\u308b\u3068\u3001IKEv2\u306f\u3088\u308a\u65b0\u3057\u3044\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308a\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u8106\u5f31\u6027\u304c\u5c11\u306a\u304f\u3001\u6700\u65b0\u306e\u6697\u53f7\u5316\u6280\u8853\u3092\u6d3b\u7528\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u4f01\u696d\u306b\u3068\u3063\u3066\u306f\u975e\u5e38\u306b\u9b45\u529b\u7684\u306a\u9078\u629e\u80a2\u3067\u3059\u3002 \u4e21\u8005\u3092\u6bd4\u8f03\u3057\u305f\u5834\u5408\u3001L2TP\/IPsec\u306f\u305d\u306e\u5805\u7262\u6027\u304b\u3089\u591a\u304f\u306e\u4f01\u696d\u306b\u53d7\u3051\u5165\u308c\u3089\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u7279\u306b\u30e2\u30d0\u30a4\u30eb\u74b0\u5883\u3067\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3084\u30e6\u30fc\u30b6\u30d3\u30ea\u30c6\u30a3\u3092\u91cd\u8996\u3059\u308b\u5834\u5408\u306b\u306f\u3001IKEv2\u304c\u9069\u3057\u305f\u9078\u629e\u80a2\u3068\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

8. \u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u9078\u3073\u65b9<\/h2>\n\n\n\n

8.1 \u30d3\u30b8\u30cd\u30b9\u30cb\u30fc\u30ba\u306b\u5fdc\u3058\u305f\u9078\u629e<\/h3>\n\n\n\n

\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u9078\u629e\u306f\u3001\u4f01\u696d\u306e\u30d3\u30b8\u30cd\u30b9\u30cb\u30fc\u30ba\u306b\u3088\u3063\u3066\u5927\u304d\u304f\u7570\u306a\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30af\u3084\u30e2\u30d0\u30a4\u30eb\u30a2\u30af\u30bb\u30b9\u304c\u91cd\u8981\u306a\u4f01\u696d\u3067\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u63a5\u7d9a\u306e\u5b89\u5b9a\u6027\u3092\u91cd\u8996\u3057\u3066L2TP\/IPsec\u3084IKEv2\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u671b\u307e\u3057\u3044\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5f93\u696d\u54e1\u304c\u5b89\u5168\u306b\u793e\u5185\u30ea\u30bd\u30fc\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002 \u4e00\u65b9\u3067\u3001\u5358\u306b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u5b89\u5168\u306a\u5229\u7528\u3092\u76ee\u7684\u3068\u3059\u308b\u5834\u5408\u3084\u3001\u6bd4\u8f03\u7684\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8981\u6c42\u304c\u4f4e\u3044\u74b0\u5883\u3067\u306f\u3001PPTP\u306e\u3088\u3046\u306a\u7c21\u6613\u306a\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3082\u5341\u5206\u306a\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u6a5f\u5bc6\u60c5\u5831\u3092\u6271\u3046\u696d\u52d9\u306e\u5834\u5408\u3001L2TP\/IPsec\u306e\u5229\u7528\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

8.2 \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ec\u30d9\u30eb\u306e\u8003\u616e<\/h3>\n\n\n\n

\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u9078\u3076\u969b\u306b\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ec\u30d9\u30eb\u3082\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u7279\u306bL2TP\/IPsec\u306f\u3001\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u3068\u8a8d\u8a3c\u304c\u5f37\u5316\u3055\u308c\u3066\u304a\u308a\u3001\u6a5f\u5bc6\u6027\u304c\u6c42\u3081\u3089\u308c\u308b\u30d3\u30b8\u30cd\u30b9\u74b0\u5883\u306b\u6700\u9069\u3067\u3059\u3002\u307e\u305f\u3001IPsec\u306f\u3001\u30c8\u30f3\u30cd\u30eb\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u62c5\u4fdd\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u3001L2TP\u3068\u9023\u643a\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u5b89\u5168\u6027\u304c\u78ba\u4fdd\u3055\u308c\u307e\u3059\u3002 \u9006\u306b\u3001PPTP\u306e\u3088\u3046\u306a\u53e4\u3044\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u8106\u5f31\u6027\u304c\u6307\u6458\u3055\u308c\u3066\u304a\u308a\u3001\u6a5f\u5bc6\u60c5\u5831\u3092\u6271\u3046\u74b0\u5883\u306b\u306f\u4e0d\u5411\u304d\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u4f01\u696d\u306f\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u9078\u629e\u3059\u308b\u969b\u306b\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u89b3\u70b9\u3092\u91cd\u8996\u3057\u3001\u30ea\u30b9\u30af\u3092\u8a55\u4fa1\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

9. L2TP\u63a5\u7d9a\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/h2>\n\n\n\n

9.1 \u3088\u304f\u3042\u308b\u63a5\u7d9a\u554f\u984c\u3068\u305d\u306e\u5bfe\u51e6\u6cd5<\/h3>\n\n\n\n

L2TP\/IPsec\u63a5\u7d9a\u3092\u5229\u7528\u3059\u308b\u969b\u306b\u3001\u30c8\u30e9\u30d6\u30eb\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3088\u304f\u3042\u308b\u554f\u984c\u306e\u4e00\u3064\u306f\u3001\u63a5\u7d9a\u304c\u78ba\u7acb\u3067\u304d\u306a\u3044\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u8a2d\u5b9a\u30df\u30b9\u3084\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u8a2d\u5b9a\u304c\u539f\u56e0\u3067\u3042\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u7279\u306b\u3001L2TP\u306fUDP\u30dd\u30fc\u30c81701\u3001IPsec\u306fUDP\u30dd\u30fc\u30c8500\u30684500\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u3001\u3053\u308c\u3089\u306e\u30dd\u30fc\u30c8\u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u307e\u305f\u3001\u30e6\u30fc\u30b6\u30fc\u540d\u3084\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u8aa4\u5165\u529b\u3082\u4e00\u822c\u7684\u306a\u554f\u984c\u3067\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u6b63\u3057\u3044\u8a8d\u8a3c\u60c5\u5831\u3092\u518d\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u63a5\u7d9a\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u78ba\u8a8d\u3057\u3001\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u57fa\u3065\u3044\u3066\u554f\u984c\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u304c\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n

9.2 \u8a2d\u5b9a\u30df\u30b9\u3092\u9632\u3050\u305f\u3081\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n

L2TP\/IPsec\u306e\u8a2d\u5b9a\u3092\u884c\u3046\u969b\u306b\u3001\u30df\u30b9\u3092\u9632\u3050\u305f\u3081\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u3044\u304f\u3064\u304b\u6319\u3052\u307e\u3059\u3002\u307e\u305a\u3001\u8a2d\u5b9a\u624b\u9806\u3092\u4e8b\u524d\u306b\u78ba\u8a8d\u3057\u3001\u5fc5\u8981\u306a\u60c5\u5831\uff08\u30b5\u30fc\u30d0\u30fc\u540d\u3001\u30e6\u30fc\u30b6\u30fc\u540d\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u3001\u4e8b\u524d\u5171\u6709\u30ad\u30fc\u306a\u3069\uff09\u3092\u6574\u3048\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u307e\u305f\u3001\u30eb\u30fc\u30bf\u30fc\u3084\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u8a2d\u5b9a\u3082\u78ba\u8a8d\u3057\u3001\u5fc5\u8981\u306a\u30dd\u30fc\u30c8\u3092\u958b\u653e\u3059\u308b\u3053\u3068\u3092\u5fd8\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002 \u3055\u3089\u306b\u3001\u63a5\u7d9a\u30c6\u30b9\u30c8\u3092\u884c\u3044\u3001\u8a2d\u5b9a\u304c\u6b63\u3057\u3044\u304b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001\u8a2d\u5b9a\u3092\u898b\u76f4\u3057\u3001\u6587\u66f8\u5316\u3057\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u6b21\u56de\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

10. L2TP\u306e\u5c06\u6765\u5c55\u671b<\/h2>\n\n\n\n

10.1 \u65b0\u6280\u8853\u3068\u306e\u7d71\u5408\u306e\u53ef\u80fd\u6027<\/h3>\n\n\n\n

L2TP\u306f\u3001VPN\u6280\u8853\u306e\u4e2d\u3067\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u4eca\u5f8c\u65b0\u3057\u3044\u6280\u8853\u3068\u306e\u7d71\u5408\u304c\u671f\u5f85\u3055\u308c\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30af\u30e9\u30a6\u30c9\u30b5\u30fc\u30d3\u30b9\u306e\u666e\u53ca\u306b\u4f34\u3044\u3001L2TP\/IPsec\u304c\u30af\u30e9\u30a6\u30c9\u74b0\u5883\u3067\u3082\u5229\u7528\u3055\u308c\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u5b89\u5168\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u304c\u5b9f\u73fe\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u307e\u305f\u3001AI\uff08\u4eba\u5de5\u77e5\u80fd\uff09\u3084\u6a5f\u68b0\u5b66\u7fd2\u3092\u6d3b\u7528\u3057\u305f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3068\u306e\u9023\u643a\u3082\u8003\u3048\u3089\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u306e\u8105\u5a01\u691c\u77e5\u3084\u81ea\u52d5\u7684\u306a\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002L2TP\u304c\u65b0\u6280\u8853\u3068\u7d71\u5408\u3055\u308c\u308b\u3053\u3068\u3067\u3001\u3055\u3089\u306a\u308b\u9032\u5316\u304c\u671f\u5f85\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

10.2 \u30d3\u30b8\u30cd\u30b9\u74b0\u5883\u306b\u304a\u3051\u308b\u5f79\u5272<\/h3>\n\n\n\n

L2TP\/IPsec\u306f\u3001\u30bb\u30ad\u30e5\u30a2\u306a\u901a\u4fe1\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u3001\u4eca\u5f8c\u3082\u30d3\u30b8\u30cd\u30b9\u74b0\u5883\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3059\u3067\u3057\u3087\u3046\u3002\u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30af\u306e\u666e\u53ca\u3084\u4f01\u696d\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u5316\u304c\u9032\u3080\u4e2d\u3067\u3001\u5b89\u5168\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u306f\u307e\u3059\u307e\u3059\u6c42\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002L2TP\u306f\u305d\u306e\u7279\u6027\u304b\u3089\u3001\u4f01\u696d\u304c\u30c7\u30fc\u30bf\u3092\u5b89\u5168\u306b\u3084\u308a\u53d6\u308a\u3059\u308b\u305f\u3081\u306e\u57fa\u76e4\u3092\u63d0\u4f9b\u3057\u7d9a\u3051\u308b\u3067\u3057\u3087\u3046\u3002 \u4eca\u5f8c\u3082L2TP\/IPsec\u306e\u904b\u7528\u306f\u3001\u30d3\u30b8\u30cd\u30b9\u306e\u6210\u9577\u3092\u652f\u3048\u308b\u305f\u3081\u306b\u6b20\u304b\u305b\u306a\u3044\u8981\u7d20\u3068\u306a\u308a\u3001\u4f01\u696d\u306f\u305d\u306e\u5c0e\u5165\u3068\u904b\u7528\u3092\u901a\u3058\u3066\u3001\u7af6\u4e89\u529b\u3092\u7dad\u6301\u3057\u3066\u3044\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5b89\u5168\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u74b0\u5883\u306e\u69cb\u7bc9\u306f\u3001\u4f01\u696d\u306e\u4fe1\u983c\u6027\u3092\u9ad8\u3081\u3001\u9867\u5ba2\u3068\u306e\u95a2\u4fc2\u3092\u5f37\u5316\u3059\u308b\u91cd\u8981\u306a\u30b9\u30c6\u30c3\u30d7\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

11. L2TP\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u306f\u3044\u304f\u3064\u3067\u3059\u304b\uff1f<\/h2>\n\n\n\n

11.1 L2TP\u3067\u4f7f\u7528\u3055\u308c\u308b\u30dd\u30fc\u30c8\u756a\u53f7<\/h3>\n\n\n\n

L2TP\uff08Layer 2 Tunneling Protocol\uff09\u306f\u3001\u7279\u5b9a\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u8ee2\u9001\u3057\u307e\u3059\u3002L2TP\u306f\u3001\u4e3b\u306bUDP\uff08User Datagram Protocol\uff09\u3092\u5229\u7528\u3057\u3066\u304a\u308a\u3001\u30dd\u30fc\u30c8\u756a\u53f71701\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u30dd\u30fc\u30c8\u306f\u3001L2TP\u30c8\u30f3\u30cd\u30eb\u306e\u78ba\u7acb\u3084\u7ba1\u7406\u306b\u5229\u7528\u3055\u308c\u308b\u305f\u3081\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3084\u30eb\u30fc\u30bf\u30fc\u306e\u8a2d\u5b9a\u3067\u958b\u653e\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u307e\u305f\u3001L2TP\/IPsec\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001\u8ffd\u52a0\u306e\u30dd\u30fc\u30c8\u3082\u5fc5\u8981\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001IPsec\u306e\u305f\u3081\u306bUDP\u30dd\u30fc\u30c8500\u304a\u3088\u30734500\u3082\u958b\u653e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30dd\u30fc\u30c8\u304c\u9069\u5207\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u3001L2TP\/IPsec\u63a5\u7d9a\u306e\u5b89\u5b9a\u6027\u3068\u5b89\u5168\u6027\u304c\u78ba\u4fdd\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

11.2 \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305f\u8a2d\u5b9a<\/h3>\n\n\n\n

L2TP\u3092\u5229\u7528\u3059\u308b\u969b\u306f\u3001\u30dd\u30fc\u30c8\u8a2d\u5b9a\u3060\u3051\u3067\u306a\u304f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3082\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u30dd\u30fc\u30c8\u756a\u53f7\u306e\u958b\u653e\u306b\u52a0\u3048\u3066\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u30eb\u30fc\u30eb\u3092\u898b\u76f4\u3057\u3001\u5916\u90e8\u304b\u3089\u306e\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u3092\u9632\u3050\u305f\u3081\u306e\u5bfe\u7b56\u3092\u8b1b\u3058\u308b\u3053\u3068\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002\u7279\u306b\u3001L2TP\/IPsec\u63a5\u7d9a\u3092\u884c\u3046\u5834\u5408\u3001\u5404\u30dd\u30fc\u30c8\u304c\u9069\u5207\u306b\u958b\u653e\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u3001VPN\u304c\u6b63\u5e38\u306b\u6a5f\u80fd\u3059\u308b\u74b0\u5883\u3092\u6574\u3048\u308b\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059\u3002 \u307e\u305f\u3001\u4e8b\u524d\u5171\u6709\u30ad\u30fc\uff08Pre-Shared Key\uff09\u3084\u30e6\u30fc\u30b6\u30fc\u540d\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u7ba1\u7406\u3082\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u60c5\u5831\u3092\u5f37\u5316\u3057\u3001\u5b9a\u671f\u7684\u306b\u5909\u66f4\u3059\u308b\u3053\u3068\u3067\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

12. L2TP\/IPsec\u3067\u4f7f\u308f\u308c\u308b\u30dd\u30fc\u30c8\u306f\uff1f<\/h2>\n\n\n\n

12.1 L2TP\/IPsec\u306b\u5fc5\u8981\u306a\u30dd\u30fc\u30c8<\/h3>\n\n\n\n

L2TP\/IPsec\u3092\u5229\u7528\u3059\u308b\u5834\u5408\u3001\u3044\u304f\u3064\u304b\u306e\u30dd\u30fc\u30c8\u304c\u5fc5\u8981\u3067\u3059\u3002\u307e\u305a\u3001L2TP\u306e\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u306b\u4f7f\u308f\u308c\u308bUDP\u30dd\u30fc\u30c81701\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306fL2TP\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u78ba\u7acb\u306b\u5fc5\u8981\u306a\u30dd\u30fc\u30c8\u3067\u3059\u3002\u3053\u306e\u30dd\u30fc\u30c8\u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u3068\u3001L2TP\u63a5\u7d9a\u304c\u6b63\u5e38\u306b\u6a5f\u80fd\u3057\u306a\u3044\u305f\u3081\u3001\u5fc5\u305a\u958b\u653e\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u6b21\u306b\u3001IPsec\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u80fd\u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u3001UDP\u30dd\u30fc\u30c8500\u30684500\u304c\u5fc5\u8981\u3067\u3059\u3002\u30dd\u30fc\u30c8500\u306f\u3001IPsec\u306e\u305f\u3081\u306eIKE\uff08Internet Key Exchange\uff09\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u4f7f\u7528\u3055\u308c\u3001\u30dd\u30fc\u30c84500\u306f\u3001NAT\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\uff08Network Address Translation\uff09\u3092\u884c\u3046\u305f\u3081\u306e\u30dd\u30fc\u30c8\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30dd\u30fc\u30c8\u304c\u9069\u5207\u306b\u958b\u653e\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u3001\u5b89\u5168\u306aL2TP\/IPsec\u63a5\u7d9a\u304c\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

12.2 \u30dd\u30fc\u30c8\u8a2d\u5b9a\u306e\u91cd\u8981\u6027<\/h3>\n\n\n\n

\u30dd\u30fc\u30c8\u8a2d\u5b9a\u306f\u3001L2TP\/IPsec\u3092\u5229\u7528\u3059\u308b\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u9069\u5207\u306a\u30dd\u30fc\u30c8\u304c\u958b\u653e\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3001\u63a5\u7d9a\u304c\u5931\u6557\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u4f01\u696d\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u74b0\u5883\u3067\u306f\u3001\u53b3\u683c\u306a\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u8a2d\u5b9a\u304c\u884c\u308f\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u591a\u3044\u305f\u3081\u3001L2TP\/IPsec\u306b\u5fc5\u8981\u306a\u30dd\u30fc\u30c8\u3092\u4e8b\u524d\u306b\u78ba\u8a8d\u3057\u3001\u958b\u653e\u3059\u308b\u3053\u3068\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002 \u307e\u305f\u3001\u30dd\u30fc\u30c8\u8a2d\u5b9a\u3092\u884c\u3063\u305f\u5f8c\u306f\u3001\u63a5\u7d9a\u30c6\u30b9\u30c8\u3092\u5b9f\u65bd\u3057\u3001VPN\u304c\u6b63\u5e38\u306b\u6a5f\u80fd\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001\u30ed\u30b0\u3092\u78ba\u8a8d\u3057\u3001\u9069\u5207\u306a\u5bfe\u51e6\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

13. UDP\u30dd\u30fc\u30c8500\u756a\u30684500\u756a\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h2>\n\n\n\n

13.1 UDP\u30dd\u30fc\u30c8500\u756a\u306e\u5f79\u5272<\/h3>\n\n\n\n

UDP\u30dd\u30fc\u30c8500\u756a\u306f\u3001IPsec\u306e\u305f\u3081\u306eIKE\uff08Internet Key Exchange\uff09\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30dd\u30fc\u30c8\u306f\u3001IPsec\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u78ba\u7acb\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u3067\u3042\u308a\u3001VPN\u63a5\u7d9a\u306b\u304a\u3051\u308b\u521d\u671f\u306e\u8a8d\u8a3c\u3068\u9375\u4ea4\u63db\u3092\u884c\u3044\u307e\u3059\u3002L2TP\/IPsec\u3092\u5229\u7528\u3059\u308b\u969b\u3001\u3053\u306e\u30dd\u30fc\u30c8\u304c\u958b\u653e\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306e\u78ba\u7acb\u304c\u3067\u304d\u305a\u3001\u63a5\u7d9a\u304c\u5931\u6557\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

13.2 UDP\u30dd\u30fc\u30c84500\u756a\u306e\u5f79\u5272<\/h3>\n\n\n\n

UDP\u30dd\u30fc\u30c84500\u756a\u306f\u3001NAT\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\uff08Network Address Translation\uff09\u3092\u884c\u3046\u305f\u3081\u306e\u30dd\u30fc\u30c8\u3067\u3059\u3002\u7279\u306b\u3001NAT\u74b0\u5883\u4e0b\u3067L2TP\/IPsec\u63a5\u7d9a\u3092\u884c\u3046\u5834\u5408\u3001\u30dd\u30fc\u30c84500\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001IPsec\u30c8\u30f3\u30cd\u30eb\u306e\u30c7\u30fc\u30bf\u3092NAT\u30c7\u30d0\u30a4\u30b9\u3092\u901a\u904e\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30dd\u30fc\u30c8\u304c\u958b\u653e\u3055\u308c\u3066\u3044\u308b\u3068\u3001NAT\u3092\u8d8a\u3048\u3066VPN\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002 \u3053\u306e\u3088\u3046\u306b\u3001UDP\u30dd\u30fc\u30c8500\u756a\u30684500\u756a\u306f\u3001\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u5f79\u5272\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u304c\u3001L2TP\/IPsec\u63a5\u7d9a\u3092\u6210\u529f\u3055\u305b\u308b\u305f\u3081\u306b\u306f\u4e21\u65b9\u306e\u30dd\u30fc\u30c8\u304c\u5fc5\u8981\u3067\u3059\u3002\u9069\u5207\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u3001\u5b89\u5168\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044VPN\u63a5\u7d9a\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

14. IPsec\u3067\u958b\u653e\u304c\u5fc5\u8981\u306a\u30dd\u30fc\u30c8\u306f\uff1f<\/h2>\n\n\n\n

14.1 IPsec\u306b\u5fc5\u8981\u306a\u30dd\u30fc\u30c8\u306e\u78ba\u8a8d<\/h3>\n\n\n\n

IPsec\u3092\u5229\u7528\u3059\u308b\u969b\u306b\u958b\u653e\u304c\u5fc5\u8981\u306a\u30dd\u30fc\u30c8\u306f\u3001\u4e3b\u306bUDP\u30dd\u30fc\u30c8500\u30684500\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30dd\u30fc\u30c8\u306f\u3001IPsec\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u80fd\u3092\u6b63\u5e38\u306b\u6a5f\u80fd\u3055\u305b\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u30dd\u30fc\u30c8500\u306fIKE\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u4f7f\u7528\u3055\u308c\u3001\u30dd\u30fc\u30c84500\u306fNAT\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u3092\u884c\u3046\u305f\u3081\u306b\u5fc5\u8981\u3067\u3059\u3002 \u3053\u308c\u3089\u306e\u30dd\u30fc\u30c8\u304c\u958b\u653e\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001L2TP\/IPsec\u63a5\u7d9a\u304c\u6b63\u5e38\u306b\u884c\u308f\u308c\u305a\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306e\u78ba\u7acb\u3084\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u304c\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u3053\u308c\u3089\u306e\u30dd\u30fc\u30c8\u304c\u9069\u5207\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n

14.2 \u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u8a2d\u5b9a\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n

IPsec\u3092\u5229\u7528\u3059\u308b\u969b\u306e\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u8a2d\u5b9a\u306f\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u304c\u30dd\u30fc\u30c8500\u30844500\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3066\u3044\u308b\u3068\u3001VPN\u63a5\u7d9a\u304c\u78ba\u7acb\u3067\u304d\u305a\u3001\u696d\u52d9\u306b\u652f\u969c\u3092\u304d\u305f\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u30eb\u30fc\u30eb\u3092\u898b\u76f4\u3057\u3001L2TP\/IPsec\u306b\u5fc5\u8981\u306a\u30dd\u30fc\u30c8\u304c\u958b\u653e\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002 \u307e\u305f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3068\u3057\u3066\u3001\u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u306e\u63a5\u7d9a\u306e\u307f\u3092\u8a31\u53ef\u3059\u308b\u8a2d\u5b9a\u3092\u884c\u3046\u3053\u3068\u3082\u6709\u52b9\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u306e\u30ea\u30b9\u30af\u3092\u8efd\u6e1b\u3057\u3001\u3088\u308a\u5b89\u5168\u306aVPN\u74b0\u5883\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

15. IPsec-VPN\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h2>\n\n\n\n

15.1 IPsec-VPN\u306e\u57fa\u672c\u6982\u5ff5<\/h3>\n\n\n\n

IPsec-VPN\u306f\u3001IPsec\uff08Internet Protocol Security\uff09\u3092\u5229\u7528\u3057\u3066\u3001\u30c7\u30fc\u30bf\u901a\u4fe1\u3092\u5b89\u5168\u306b\u884c\u3046\u305f\u3081\u306e\u4eee\u60f3\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08VPN\uff09\u306e\u4e00\u7a2e\u3067\u3059\u3002IPsec\u306f\u3001\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u3068\u8a8d\u8a3c\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u901a\u4fe1\u5185\u5bb9\u3092\u4fdd\u8b77\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u4ecb\u3057\u3066\u9001\u4fe1\u3055\u308c\u308b\u60c5\u5831\u304c\u7b2c\u4e09\u8005\u306b\u76d7\u8074\u3055\u308c\u308b\u30ea\u30b9\u30af\u3092\u8efd\u6e1b\u3057\u307e\u3059\u3002 IPsec-VPN\u306f\u3001\u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30ab\u30fc\u3084\u62e0\u70b9\u9593\u63a5\u7d9a\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u52b9\u679c\u7684\u3067\u3042\u308a\u3001\u4f01\u696d\u304c\u5b89\u5168\u306a\u901a\u4fe1\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u624b\u6bb5\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u7279\u306b\u3001L2TP\u3084IKEv2\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u5f37\u5316\u3055\u308c\u305fVPN\u63a5\u7d9a\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

15.2 IPsec-VPN\u306e\u5229\u70b9\u3068\u6d3b\u7528\u30b7\u30fc\u30f3<\/h3>\n\n\n\n

IPsec-VPN\u306e\u4e3b\u306a\u5229\u70b9\u306f\u3001\u5f37\u529b\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u80fd\u306b\u3042\u308a\u307e\u3059\u3002\u30c7\u30fc\u30bf\u304c\u6697\u53f7\u5316\u3055\u308c\u308b\u305f\u3081\u3001\u60c5\u5831\u6f0f\u6d29\u306e\u30ea\u30b9\u30af\u304c\u5927\u5e45\u306b\u6e1b\u5c11\u3057\u307e\u3059\u3002\u307e\u305f\u3001IPsec\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u5229\u7528\u3057\u3066\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3068\u8a8d\u8a3c\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002 IPsec-VPN\u306f\u3001\u7279\u306b\u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30af\u3084\u591a\u62e0\u70b9\u9593\u306e\u901a\u4fe1\u306b\u304a\u3044\u3066\u6d3b\u7528\u3055\u308c\u307e\u3059\u3002\u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30ab\u30fc\u304c\u4f01\u696d\u306e\u5185\u90e8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u3001\u5b89\u5168\u306a\u30c8\u30f3\u30cd\u30eb\u3092\u901a\u3058\u3066\u30c7\u30fc\u30bf\u3092\u3084\u308a\u53d6\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u696d\u52d9\u306e\u52b9\u7387\u5316\u3092\u56f3\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002\u307e\u305f\u3001\u8907\u6570\u306e\u62e0\u70b9\u9593\u3067\u306e\u30c7\u30fc\u30bf\u5171\u6709\u306b\u3082\u9069\u3057\u3066\u304a\u308a\u3001\u4f01\u696d\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u5316\u3092\u652f\u3048\u308b\u91cd\u8981\u306a\u6280\u8853\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\u3088\u304f\u3042\u308b\u8cea\u554f\u3068\u56de\u7b54<\/h2>\n\n\n\n

L2TP\u3068\u306f\u3069\u3046\u3044\u3046\u610f\u5473\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n

L2TP\uff08Layer 2 Tunneling Protocol\uff09\u306f\u3001\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3067\u306e\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002\u4e3b\u306bVPN\u63a5\u7d9a\u306b\u4f7f\u7528\u3055\u308c\u3001\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u5b89\u5168\u306b\u7d50\u3076\u305f\u3081\u306b\u30c7\u30fc\u30bf\u30d1\u30b1\u30c3\u30c8\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u307e\u3059\u3002\u30ea\u30e2\u30fc\u30c8\u30e6\u30fc\u30b6\u30fc\u304c\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u3001L2TP\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u4fe1\u983c\u6027\u3092\u9ad8\u3081\u308b\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

IPsec\u3068L2TP\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n

IPsec\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3059\u308b\u305f\u3081\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u30b9\u30a4\u30fc\u30c8\u3067\u3042\u308a\u3001\u4e3b\u306b\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u3068\u8a8d\u8a3c\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u4e00\u65b9\u3001L2TP\u306f\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308a\u3001IPsec\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u5b89\u5168\u306a\u9001\u4fe1\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002L2TP\u5358\u4f53\u3067\u306f\u6697\u53f7\u5316\u6a5f\u80fd\u304c\u306a\u3044\u305f\u3081\u3001IPsec\u3068\u306e\u4f75\u7528\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

L2TP\/IPsec\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u306f\uff1f<\/h3>\n\n\n\n

L2TP\/IPsec\u306e\u4e3b\u306a\u30c7\u30e1\u30ea\u30c3\u30c8\u306b\u306f\u3001\u8a2d\u5b9a\u306e\u8907\u96d1\u3055\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u5f71\u97ff\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u6697\u53f7\u5316\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u901a\u4fe1\u306e\u901f\u5ea6\u304c\u9045\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u4e92\u63db\u6027\u306e\u554f\u984c\u3082\u3042\u308a\u3001\u53e4\u3044\u6a5f\u5668\u3084\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3068\u306e\u63a5\u7d9a\u304c\u96e3\u3057\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

IKEv2 L2TP\u3069\u3063\u3061\u304c\u826f\u3044\uff1f<\/h3>\n\n\n\n

IKEv2\u306f\u3001\u63a5\u7d9a\u306e\u518d\u78ba\u7acb\u304c\u5bb9\u6613\u3067\u3001\u7279\u306b\u30e2\u30d0\u30a4\u30eb\u30c7\u30d0\u30a4\u30b9\u306b\u5f37\u3044\u3068\u3044\u3046\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u65b9\u3067\u3001L2TP\/IPsec\u306f\u305d\u306e\u5805\u7262\u6027\u304b\u3089\u591a\u304f\u306e\u4f01\u696d\u306b\u53d7\u3051\u5165\u308c\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u30d3\u30b8\u30cd\u30b9\u306e\u30cb\u30fc\u30ba\u306b\u5fdc\u3058\u3066\u3001\u3069\u3061\u3089\u304c\u9069\u3057\u3066\u3044\u308b\u304b\u3092\u8a55\u4fa1\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n

L2TP\u65b9\u5f0f\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n

L2TP\u65b9\u5f0f\u306f\u3001\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3067\u306e\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u3092\u5b9f\u73fe\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3001\u4e3b\u306bVPN\u63a5\u7d9a\u306b\u5229\u7528\u3055\u308c\u307e\u3059\u3002L2TP\u306f\u3001\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u7d50\u3076\u305f\u3081\u306b\u30c7\u30fc\u30bf\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3059\u308b\u305f\u3081\u306bIPsec\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

L2TP\/IPsec VPN\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n

L2TP\/IPsec VPN\u306f\u3001L2TP\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u7528\u3044\u3066\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u3092\u884c\u3044\u3001IPsec\u3092\u5229\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3059\u308bVPN\u306e\u4e00\u7a2e\u3067\u3059\u3002\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308a\u3001\u5b89\u5168\u306a\u30c7\u30fc\u30bf\u901a\u4fe1\u304c\u53ef\u80fd\u3068\u306a\u308a\u3001\u30ea\u30e2\u30fc\u30c8\u30e6\u30fc\u30b6\u30fc\u304c\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u5b89\u5168\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

VPN\u63a5\u7d9a\u65b9\u5f0f\u306b\u306f\u3069\u306e\u3088\u3046\u306a\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n

VPN\u63a5\u7d9a\u65b9\u5f0f\u306b\u306f\u3001PPTP\u3001L2TP\/IPsec\u3001OpenVPN\u3001IKEv2\/IPsec\u306a\u3069\u306e\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002L2TP\/IPsec\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30d0\u30e9\u30f3\u30b9\u304c\u53d6\u308c\u305f\u63a5\u7d9a\u65b9\u5f0f\u3068\u3057\u3066\u5e83\u304f\u5229\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

VPN\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u5f97\u3089\u308c\u308b\u30e1\u30ea\u30c3\u30c8\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n

VPN\u3092\u5229\u7528\u3059\u308b\u3068\u3001\u30ea\u30e2\u30fc\u30c8\u74b0\u5883\u304b\u3089\u5b89\u5168\u306b\u793e\u5185\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3078\u30a2\u30af\u30bb\u30b9\u3067\u304d\u3001\u901a\u4fe1\u5185\u5bb9\u306e\u6697\u53f7\u5316\u306b\u3088\u308a\u30c7\u30fc\u30bf\u6f0f\u6d29\u30ea\u30b9\u30af\u304c\u4f4e\u6e1b\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u9060\u9694\u52e4\u52d9\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5fc5\u8981\u3068\u3059\u308b\u901a\u4fe1\u306b\u304a\u3044\u3066\u3001\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u901a\u4fe1\u624b\u6bb5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

LAN\u540c\u58eb\u3092\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306eVPN\u306e\u4f7f\u3044\u65b9\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044<\/h3>\n\n\n\n

LAN\u540c\u58eb\u3092VPN\u3067\u63a5\u7d9a\u3059\u308b\u3053\u3068\u3067\u3001\u7570\u306a\u308b\u62e0\u70b9\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u7d71\u5408\u3057\u3001\u540c\u4e00\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u8907\u6570\u62e0\u70b9\u9593\u306e\u5b89\u5168\u306a\u901a\u4fe1\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\u30ea\u30e2\u30fc\u30c8\u30a2\u30af\u30bb\u30b9\u306b\u304a\u3051\u308b\u30e6\u30fc\u30b6\u30fc\u540d\u306e\u8a2d\u5b9a\u65b9\u6cd5\u306f\uff1f<\/h3>\n\n\n\n

\u30ea\u30e2\u30fc\u30c8\u30a2\u30af\u30bb\u30b9\u3092\u8a2d\u5b9a\u3059\u308b\u969b\u3001\u30e6\u30fc\u30b6\u30fc\u540d\u3068\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u305f\u8a8d\u8a3c\u3092\u884c\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5916\u90e8\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u304c\u5236\u9650\u3055\u308c\u3001\u6307\u5b9a\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc\u306e\u307f\u304c\u63a5\u7d9a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u30ea\u30e2\u30fc\u30c8\u30a2\u30af\u30bb\u30b9VPN\u3068\u306f\u3069\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n

\u30ea\u30e2\u30fc\u30c8\u30a2\u30af\u30bb\u30b9VPN\u306f\u3001\u30ea\u30e2\u30fc\u30c8\u74b0\u5883\u304b\u3089\u793e\u5185\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u306eVPN\u63a5\u7d9a\u65b9\u5f0f\u3067\u3059\u3002\u793e\u54e1\u304c\u5916\u51fa\u5148\u3084\u5728\u5b85\u52e4\u52d9\u6642\u306b\u3001\u5b89\u5168\u306a\u901a\u4fe1\u74b0\u5883\u3092\u78ba\u4fdd\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\u4e8b\u524d\u5171\u6709\u9375\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n

\u4e8b\u524d\u5171\u6709\u9375\u306f\u3001VPN\u63a5\u7d9a\u306e\u969b\u306b\u8a8d\u8a3c\u306b\u4f7f\u7528\u3055\u308c\u308b\u9375\u3067\u3059\u3002\u4e8b\u524d\u306b\u5171\u6709\u3055\u308c\u305f\u9375\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u901a\u4fe1\u76f8\u624b\u3092\u8a8d\u8a3c\u3057\u3001\u30c7\u30fc\u30bf\u306e\u5b89\u5168\u6027\u3092\u78ba\u4fdd\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

RADIUS\u8a8d\u8a3c\u3092VPN\u3067\u4f7f\u7528\u3059\u308b\u30e1\u30ea\u30c3\u30c8\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n

RADIUS\u8a8d\u8a3c\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u7ba1\u7406\u3084\u30ed\u30b0\u30a4\u30f3\u306e\u7d71\u5408\u7ba1\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u5927\u898f\u6a21\u306a\u30e6\u30fc\u30b6\u30fc\u74b0\u5883\u3067\u52b9\u7387\u7684\u306a\u30a2\u30af\u30bb\u30b9\u7ba1\u7406\u304c\u5b9f\u73fe\u3067\u304d\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3082\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

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