{"id":332,"date":"2025-06-14T15:33:00","date_gmt":"2025-06-14T06:33:00","guid":{"rendered":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=332"},"modified":"2025-10-22T00:05:58","modified_gmt":"2025-10-21T15:05:58","slug":"ipsec","status":"publish","type":"post","link":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=332","title":{"rendered":"IPsec"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">IPsec\u3068\u306f\u4f55\u304b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">IPsec\uff08\u30a2\u30a4\u30d4\u30fc\u30bb\u30c3\u30af\uff09<\/span><\/strong>\u306f\u3001<strong><span class=\"swl-marker mark_yellow\">\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u3088\u3046\u306a\u516c\u958b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u3082\u5b89\u5168\u306b\u901a\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f<\/span><\/strong>\u3067\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u3067\u52d5\u4f5c\u3057\u3001\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3057\u305f\u308a\u3001\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3057\u305f\u308a\u3059\u308b\u5f79\u5272\u3092\u6301\u3061\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5916\u90e8\u304b\u3089\u76d7\u8074\u3055\u308c\u305f\u308a\u3001\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u63db\u3048\u3089\u308c\u305f\u308a\u3059\u308b\u30ea\u30b9\u30af\u3092\u5927\u304d\u304f\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002IPsec\u3092\u5229\u7528\u3057\u305fVPN\uff08\u4eee\u60f3\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff09\u306f\u3001\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u62e0\u70b9\u9593\u901a\u4fe1\u3084\u30ea\u30e2\u30fc\u30c8\u30a2\u30af\u30bb\u30b9\u306b\u5e83\u304f\u5229\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPsec\u306f\u5358\u72ec\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u306f\u306a\u304f\u3001AH\uff08\u8a8d\u8a3c\u30d8\u30c3\u30c0\uff09\u3001ESP\uff08\u6697\u53f7\u5316\u30da\u30a4\u30ed\u30fc\u30c9\uff09\u3001IKE\uff08\u9375\u4ea4\u63db\uff09\u3068\u3044\u3063\u305f\u8907\u6570\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u52d5\u4f5c\u3057\u307e\u3059\u3002\u8a66\u9a13\u3067\u3082\u983b\u51fa\u3059\u308b\u90e8\u5206\u306a\u306e\u3067\u3001\u3053\u3053\u306f\u78ba\u5b9f\u306b\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">IPsec\u304c\u52d5\u4f5c\u3059\u308b\u30ec\u30a4\u30e4\u30fc<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPsec\u306f<strong><span class=\"swl-marker mark_yellow\">\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\uff08IP\u5c64\uff09<\/span><\/strong>\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u4e0a\u4f4d\u5c64\u3067\u4f7f\u3046\u901a\u4fe1\u65b9\u5f0f\u304cTCP\u3067\u3042\u3063\u3066\u3082UDP\u3067\u3042\u3063\u3066\u3082\u554f\u984c\u306a\u304f\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3054\u3068\u306b\u7279\u5225\u306a\u8a2d\u5b9a\u3092\u3057\u306a\u304f\u3066\u3082\u3001IP\u901a\u4fe1\u3067\u3042\u308c\u3070\u3059\u3079\u3066\u4fdd\u8b77\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u65b9\u3067\u3001<strong><span class=\"swl-marker mark_yellow\">SSL\uff08\u73fe\u5728\u3067\u306fTLS\u3068\u547c\u3070\u308c\u308b\u3053\u3068\u304c\u591a\u3044\uff09\u306f\u30bb\u30c3\u30b7\u30e7\u30f3\u5c64<\/span><\/strong>\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u7279\u5b9a\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff08\u4f8b\uff1aHTTPS\uff09\u306b\u9650\u5b9a\u3055\u308c\u308b\u306e\u306b\u5bfe\u3057\u3001IPsec\u306f\u3082\u3063\u3068\u4e0b\u306e\u30ec\u30a4\u30e4\u30fc\u3067\u52d5\u304f\u305f\u3081\u5e45\u5e83\u3044\u901a\u4fe1\u3092\u5b88\u308c\u308b\u306e\u304c\u7279\u5fb4\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u3053\u3053\u306f\u8a66\u9a13\u3067\u300cSSL\u3068IPsec\u306e\u9055\u3044\u306f\u3069\u306e\u30ec\u30a4\u30e4\u30fc\u3067\u52d5\u4f5c\u3059\u308b\u304b\u300d\u3068\u3044\u3046\u5f62\u3067\u51fa\u984c\u3055\u308c\u3084\u3059\u3044\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">IPsec\u3092\u69cb\u6210\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPsec\u306f\u8907\u6570\u306e\u8981\u7d20\u304b\u3089\u6210\u308a\u7acb\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u5f79\u5272\u3092\u6574\u7406\u3059\u308b\u3068\u7406\u89e3\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d7\u30ed\u30c8\u30b3\u30eb<\/th><th>\u4e3b\u306a\u5f79\u5272<\/th><th>\u4f7f\u7528\u756a\u53f7<\/th><\/tr><\/thead><tbody><tr><td>AH\uff08Authentication Header\uff09<\/td><td>\u30d1\u30b1\u30c3\u30c8\u306e\u6539\u3056\u3093\u9632\u6b62\uff08\u8a8d\u8a3c\u6a5f\u80fd\u306e\u307f\uff09\u3002\u6697\u53f7\u5316\u306f\u884c\u308f\u306a\u3044\u3002<\/td><td>IP\u30d7\u30ed\u30c8\u30b3\u30eb\u756a\u53f7 51<\/td><\/tr><tr><td>ESP\uff08Encapsulating Security Payload\uff09<\/td><td>\u30d1\u30b1\u30c3\u30c8\u306e\u6697\u53f7\u5316\u3068\u6539\u3056\u3093\u9632\u6b62\uff08HMAC + \u6697\u53f7\u5316\uff09\u3002\u30c7\u30fc\u30bf\u90e8\u5206\u3092\u5b88\u308b\u3002<\/td><td>IP\u30d7\u30ed\u30c8\u30b3\u30eb\u756a\u53f7 50<\/td><\/tr><tr><td>IKE\uff08Internet Key Exchange\uff09<\/td><td>\u901a\u4fe1\u76f8\u624b\u3068\u5b89\u5168\u306b\u9375\u3092\u4ea4\u63db\u3059\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3002ISAKMP\u3068Oakley\u3092\u30d9\u30fc\u30b9\u306b\u52d5\u4f5c\u3057\u3001Diffie-Hellman\u9375\u4ea4\u63db\u3092\u5229\u7528\u3059\u308b\u3002<\/td><td>UDP\u30dd\u30fc\u30c8\u756a\u53f7 500<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u3053\u3053\u3067\u7279\u306b\u899a\u3048\u3066\u304a\u304d\u305f\u3044\u306e\u306f\u3001AH\u306f\u6697\u53f7\u5316\u3067\u304d\u306a\u3044\u3001ESP\u306f\u6697\u53f7\u5316\u3068\u8a8d\u8a3c\u306e\u4e21\u65b9\u304c\u53ef\u80fd\u3068\u3044\u3046\u70b9\u3067\u3059\u3002\u73fe\u5728\u306e\u5b9f\u88c5\u3067\u306f\u3001\u591a\u304f\u306e\u5834\u5408\u300cESP\u3068IKE\u300d\u3060\u3051\u3092\u5229\u7528\u3059\u308b\u65b9\u5f0f\u304c\u4e3b\u6d41\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">AH\u3068ESP\u306e\u4ed5\u7d44\u307f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">AH\u3068ESP\u306b\u306f\u3001\u305d\u308c\u305e\u308c\u5c02\u7528\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u7528\u610f\u3055\u308c\u3066\u304a\u308a\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u62c5\u4fdd\u3059\u308b\u305f\u3081\u306b\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">AH\u306e\u30d5\u30a3\u30fc\u30eb\u30c9<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Next Header\uff1a\u5f8c\u7d9a\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\uff08TCP\/UDP\u306a\u3069\uff09\u3092\u793a\u3059<\/li>\n\n\n\n<li>Payload Length\uff1aAH\u30d8\u30c3\u30c0\u306e\u9577\u3055<\/li>\n\n\n\n<li>SPI\uff08Security Parameters Index\uff09\uff1a\u3069\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u3092\u4f7f\u3046\u304b\u3092\u8b58\u5225<\/li>\n\n\n\n<li>Sequence Number\uff1a\u30ea\u30d7\u30ec\u30a4\u653b\u6483\u3092\u9632\u3050\u305f\u3081\u306e\u756a\u53f7<\/li>\n\n\n\n<li>Authentication Data\uff1a\u6539\u3056\u3093\u691c\u51fa\u306e\u305f\u3081\u306e\u5024\uff08HMAC\u306b\u3088\u308bICV\uff09<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">ESP\u306e\u30d5\u30a3\u30fc\u30eb\u30c9<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SPI\uff1a\u5229\u7528\u3059\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8b58\u5225<\/li>\n\n\n\n<li>Sequence Number\uff1a\u30ea\u30d7\u30ec\u30a4\u653b\u6483\u5bfe\u7b56<\/li>\n\n\n\n<li>Payload Data\uff1a\u6697\u53f7\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u672c\u4f53<\/li>\n\n\n\n<li>Padding \/ Pad Length\uff1a\u6697\u53f7\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306b\u5408\u308f\u305b\u308b\u305f\u3081\u306e\u8abf\u6574\u30c7\u30fc\u30bf<\/li>\n\n\n\n<li>Next Header\uff1a\u6b21\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u793a\u3059<\/li>\n\n\n\n<li>Authentication Data\uff1a\u30c7\u30fc\u30bf\u6539\u3056\u3093\u3092\u9632\u3050HMAC\u306e\u5024<\/li>\n<\/ul>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u3053\u3053\u3067\u306fSPI\u3001Sequence Number\u3001Authentication Data\u304c\u4e21\u65b9\u306b\u5171\u901a\u3057\u3066\u3044\u308b\u70b9\u3092\u62bc\u3055\u3048\u3066\u304a\u304f\u3068\u6574\u7406\u3057\u3084\u3059\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">IPsec\u3092\u7406\u89e3\u3059\u308b\u5168\u4f53\u50cf<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPsec\u306f\u5358\u306a\u308b\u67a0\u7d44\u307f\uff08\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\uff09\u3067\u3042\u308a\u3001\u5b9f\u969b\u306e\u901a\u4fe1\u3067\u306f\u6b21\u306e\u3088\u3046\u306a\u9078\u629e\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>AH\u304bESP\u304b\u3001\u305d\u306e\u4e21\u65b9\u3092\u4f7f\u3046\u304b<\/li>\n\n\n\n<li>\u3069\u306e\u6697\u53f7\u5316\u65b9\u5f0f\u3092\u4f7f\u3046\u304b\uff08AES\u30013DES\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u8a8d\u8a3c\u65b9\u5f0f\u306b\u4f55\u3092\u4f7f\u3046\u304b\uff08HMAC-SHA\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u9375\u4ea4\u63db\u3092\u3069\u3046\u884c\u3046\u304b\uff08IKE\u306e\u5229\u7528\uff09<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306b\u8907\u6570\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u30bb\u30ad\u30e5\u30a2\u306a\u901a\u4fe1\u3092\u69cb\u7bc9\u3067\u304d\u308b\u306e\u304cIPsec\u306e\u7279\u5fb4\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u3067\u306f\u3001\u300c\u3069\u306e\u30ec\u30a4\u30e4\u30fc\u3067\u52d5\u4f5c\u3059\u308b\u306e\u304b\u300d\u300c\u3069\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u304c\u4f55\u3092\u62c5\u5f53\u3057\u3066\u3044\u308b\u306e\u304b\u300d\u3068\u3044\u3063\u305f\u90e8\u5206\u304c\u554f\u308f\u308c\u3084\u3059\u3044\u305f\u3081\u3001\u5f79\u5272\u3092\u3057\u3063\u304b\u308a\u6574\u7406\u3057\u3066\u899a\u3048\u3066\u304a\u304f\u3068\u5b89\u5fc3\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">IPsec\u306e\u901a\u4fe1\u30e2\u30fc\u30c9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPsec\u306b\u306f2\u3064\u306e\u901a\u4fe1\u30e2\u30fc\u30c9\u304c\u3042\u308a\u3001\u305d\u308c\u305e\u308c\u3069\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u4f7f\u3046\u304b\u306b\u3088\u3063\u3066\u4f7f\u3044\u5206\u3051\u3089\u308c\u307e\u3059\u3002\u30e2\u30fc\u30c9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001VPN\u304c\u3069\u306e\u3088\u3046\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u8b77\u3057\u3066\u3044\u308b\u306e\u304b\u304c\u30a4\u30e1\u30fc\u30b8\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\u3067\u306f\u3001\u9001\u4fe1\u5143\u30d1\u30b1\u30c3\u30c8\u306e<strong><span class=\"swl-marker mark_yellow\">\u5143\u306eIP\u30d8\u30c3\u30c0\u306f\u305d\u306e\u307e\u307e\u5229\u7528<\/span><\/strong>\u3057\u307e\u3059\u3002\u6697\u53f7\u5316\u3055\u308c\u308b\u306e\u306f\u3001IP\u30d8\u30c3\u30c0\u4ee5\u964d\u306e<strong><span class=\"swl-marker mark_yellow\">\u4e0a\u4f4d\u5c64\uff08\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u4ee5\u4e0a\uff09\u306e\u30c7\u30fc\u30bf\u90e8\u5206<\/span><\/strong>\u3060\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5143\u306eIP\u30d8\u30c3\u30c0\u306f\u6697\u53f7\u5316\u3057\u306a\u3044<\/li>\n\n\n\n<li>TCP\u3084UDP\u306a\u3069\u306e\u30c7\u30fc\u30bf\u90e8\u306e\u307f\u3092\u6697\u53f7\u5316\u3059\u308b<\/li>\n\n\n\n<li>AH\u3084ESP\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u8a8d\u8a3c\u7bc4\u56f2\u304c\u5909\u308f\u308b<\/li>\n\n\n\n<li>\u8ee2\u9001\u6642\u306f\u5143\u306eIP\u30d8\u30c3\u30c0\u3092\u4f7f\u3063\u3066\u5b9b\u5148\u306b\u5c4a\u3051\u308b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4ed5\u7d44\u307f\u306f\u3001IPsec\u3092\u76f4\u63a5\u5b9f\u88c5\u3057\u305f\u30db\u30b9\u30c8\u540c\u58eb\u306e\u901a\u4fe1\u3067\u3088\u304f\u5229\u7528\u3055\u308c\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u30b5\u30fc\u30d0\u3068\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u76f4\u63a5IPsec\u3092\u4f7f\u3063\u3066\u5b89\u5168\u306b\u3084\u308a\u53d6\u308a\u3059\u308b\u3088\u3046\u306a\u5834\u9762\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c8\u30f3\u30cd\u30eb\u30e2\u30fc\u30c9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c8\u30f3\u30cd\u30eb\u30e2\u30fc\u30c9\u3067\u306f\u3001\u9001\u4fe1\u5143\u30d1\u30b1\u30c3\u30c8\u306e<strong><span class=\"swl-marker mark_yellow\">\u5143\u306eIP\u30d8\u30c3\u30c0\u3054\u3068\u6697\u53f7\u5316<\/span><\/strong>\u3057\u307e\u3059\u3002\u305d\u306e\u4e0a\u306b\u3001\u65b0\u3057\u3044IP\u30d8\u30c3\u30c0\u3092\u4ed8\u3051\u52a0\u3048\u3066\u30d1\u30b1\u30c3\u30c8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5143\u306eIP\u30d8\u30c3\u30c0\u3082\u6697\u53f7\u5316\u3055\u308c\u308b<\/li>\n\n\n\n<li>\u4e0a\u4f4d\u5c64\u306e\u30c7\u30fc\u30bf\u3082\u542b\u3081\u3001\u30d1\u30b1\u30c3\u30c8\u5168\u4f53\u304c\u4fdd\u8b77\u3055\u308c\u308b<\/li>\n\n\n\n<li>\u65b0\u3057\u3044IP\u30d8\u30c3\u30c0\u3092\u8ffd\u52a0\u3057\u3066\u8ee2\u9001\u3055\u308c\u308b<\/li>\n\n\n\n<li>AH\u3084ESP\u3067\u8a8d\u8a3c\u7bc4\u56f2\u304c\u5909\u308f\u308b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30e2\u30fc\u30c9\u306f\u3001\u62e0\u70b9\u9593\u3092\u7d50\u3076VPN\u30eb\u30fc\u30bf\u540c\u58eb\u306e\u901a\u4fe1\u3067\u5229\u7528\u3055\u308c\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u30e6\u30fc\u30b6\u306ePC\u306fIPsec\u3092\u610f\u8b58\u305b\u305a\u3001\u901a\u5e38\u306eLAN\u901a\u4fe1\u3092\u884c\u3046\u3060\u3051\u3067\u3001\u30eb\u30fc\u30bf\u9593\u3067\u5b89\u5168\u306a\u30c8\u30f3\u30cd\u30eb\u3092\u901a\u3057\u3066\u30c7\u30fc\u30bf\u304c\u9001\u3089\u308c\u308b\u4ed5\u7d44\u307f\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u3067\u306f\u300c\u30db\u30b9\u30c8\u9593\u306a\u3089\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\u3001\u30eb\u30fc\u30bf\u9593\u306a\u3089\u30c8\u30f3\u30cd\u30eb\u30e2\u30fc\u30c9\u300d\u3068\u3044\u3063\u305f\u5f62\u3067\u554f\u308f\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u306e\u3067\u3001\u5229\u7528\u5834\u9762\u3068\u3042\u308f\u305b\u3066\u6574\u7406\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\u3068\u30c8\u30f3\u30cd\u30eb\u30e2\u30fc\u30c9\u306b\u304a\u3051\u308bAH\u30d1\u30b1\u30c3\u30c8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">AH\uff08Authentication Header\uff09\u306f\u30d1\u30b1\u30c3\u30c8\u306e\u6539\u3056\u3093\u3092\u9632\u3050\u8a8d\u8a3c\u7528\u306e\u30d8\u30c3\u30c0\u3067\u3059\u3002\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\u3067\u306f\u5143\u306eIP\u30d8\u30c3\u30c0\u3092\u6b8b\u3057\u305f\u307e\u307e\u8a8d\u8a3c\u304c\u884c\u308f\u308c\u3001\u30c8\u30f3\u30cd\u30eb\u30e2\u30fc\u30c9\u3067\u306f\u65b0\u3057\u3044IP\u30d8\u30c3\u30c0\u304c\u52a0\u308f\u308a\u3001\u305d\u306e\u4e0b\u306b\u3042\u308b\u30d1\u30b1\u30c3\u30c8\u5168\u4f53\u304c\u8a8d\u8a3c\u5bfe\u8c61\u3068\u306a\u308a\u307e\u3059\u3002IPv4\u74b0\u5883\u3067\u306fAH\u306f\u3042\u307e\u308a\u4f7f\u308f\u308c\u306a\u3044\u70b9\u3082\u899a\u3048\u3066\u304a\u304f\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\u3068\u30c8\u30f3\u30cd\u30eb\u30e2\u30fc\u30c9\u306b\u304a\u3051\u308bESP\u30d1\u30b1\u30c3\u30c8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ESP\uff08Encapsulating Security Payload\uff09\u306f\u6697\u53f7\u5316\u3068\u8a8d\u8a3c\u306e\u4e21\u65b9\u3092\u62c5\u3046\u305f\u3081\u3001IPsec\u3067\u6700\u3082\u3088\u304f\u5229\u7528\u3055\u308c\u308b\u5f62\u5f0f\u3067\u3059\u3002\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\u3067\u306f\u30c7\u30fc\u30bf\u90e8\u5206\u3092\u6697\u53f7\u5316\u3057\u3001\u30c8\u30f3\u30cd\u30eb\u30e2\u30fc\u30c9\u3067\u306f\u5143\u306eIP\u30d8\u30c3\u30c0\u3092\u542b\u3080\u30d1\u30b1\u30c3\u30c8\u5168\u4f53\u3092\u6697\u53f7\u5316\u3067\u304d\u307e\u3059\u3002\u73fe\u5728\u306eVPN\u306e\u5b9f\u88c5\u3067\u306f\u3001\u3053\u306eESP\u3092\u5229\u7528\u3057\u305f\u69cb\u6210\u304c\u4e3b\u6d41\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">AH\u3068ESP\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u30d1\u30b1\u30c3\u30c8\u5f62\u5f0f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">AH\u3068ESP\u3092\u540c\u6642\u306b\u5229\u7528\u3059\u308b\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001ESP\u304c\u6697\u53f7\u5316\u3092\u62c5\u5f53\u3057\u3001AH\u304c\u30d1\u30b1\u30c3\u30c8\u5168\u4f53\u306e\u8a8d\u8a3c\u3092\u884c\u3044\u307e\u3059\u3002ESP\u306e\u8a8d\u8a3c\u6a5f\u80fd\u306f\u4e0d\u8981\u3068\u306a\u308a\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u80fd\u3092\u5206\u62c5\u3055\u305b\u308b\u5f62\u306b\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u30d8\u30c3\u30c0\u304c\u5897\u3048\u308b\u305f\u3081\u30d1\u30b1\u30c3\u30c8\u304c\u5927\u304d\u304f\u306a\u308b\u70b9\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u65b9\u5f0f\u306f\u8a66\u9a13\u3067\u306f\u300cAH\u304c\u5168\u4f53\u306e\u8a8d\u8a3c\u3092\u62c5\u5f53\u3059\u308b\u300d\u300cESP\u306f\u6697\u53f7\u5316\u306b\u5c02\u5ff5\u3059\u308b\u300d\u3068\u3044\u3046\u4ed5\u7d44\u307f\u304c\u554f\u308f\u308c\u3084\u3059\u3044\u90e8\u5206\u306a\u306e\u3067\u3001\u6574\u7406\u3057\u3066\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SA\uff08Security Association\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPsec\u3067\u306f\u3001\u30d1\u30b1\u30c3\u30c8\u3092\u6697\u53f7\u5316\u3057\u305f\u308a\u8a8d\u8a3c\u3057\u305f\u308a\u3059\u308b\u305f\u3081\u306b<strong><span class=\"swl-marker mark_yellow\">SA\uff08\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\uff09<\/span><\/strong>\u3068\u3044\u3046\u4ed5\u7d44\u307f\u3092\u4f7f\u3044\u307e\u3059\u3002\u3053\u308c\u306fVPN\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u540c\u58eb\u304c\u300c\u3069\u3093\u306a\u65b9\u6cd5\u3067\u901a\u4fe1\u3059\u308b\u304b\u300d\u3092\u53d6\u308a\u6c7a\u3081\u308b\u305f\u3081\u306e\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002IPsec\u306e\u901a\u4fe1\u306f\u5fc5\u305a\u3053\u306eSA\u3092\u5229\u7528\u3057\u3066\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SA\u306f\u4e00\u65b9\u5411\u306e\u901a\u4fe1\u306b\u5bfe\u3057\u3066\u8a2d\u5b9a\u3055\u308c\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u3068\u53d7\u4fe1\u306b\u306f\u305d\u308c\u305e\u308c\u5225\u306eSA\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u53cc\u65b9\u5411\u3067\u901a\u4fe1\u3092\u884c\u3046\u305f\u3081\u306b\u306f\u6700\u4f4e\u3067\u30822\u3064\u306eSA\u304c\u78ba\u7acb\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u3082\u3057AH\u3068ESP\u306e\u4e21\u65b9\u3092\u4f7f\u3063\u3066\u901a\u4fe1\u3059\u308b\u5834\u5408\u306b\u306f\u3001\u9001\u53d7\u4fe1\u305d\u308c\u305e\u308c\u306b\u5bfe\u3057\u3066SA\u304c\u5fc5\u8981\u306b\u306a\u308b\u305f\u3081\u3001\u5408\u8a08\u30674\u3064\u306eSA\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SA\u306e\u8b58\u5225\u3068\u7ba1\u7406<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u969b\u306bIPsec\u901a\u4fe1\u304c\u884c\u308f\u308c\u308b\u3068\u3001\u8907\u6570\u306eSA\u304c\u540c\u6642\u306b\u5b58\u5728\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u4e2d\u3067\u300c\u3069\u306eSA\u3092\u4f7f\u3063\u3066\u51e6\u7406\u3059\u3079\u304d\u304b\u300d\u3092\u8b58\u5225\u3059\u308b\u305f\u3081\u306b\u3001<strong><span class=\"swl-marker mark_yellow\">SPI\uff08Security Parameters Index\uff09<\/span><\/strong>\u3068\u3044\u3046\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u5229\u7528\u3055\u308c\u307e\u3059\u3002AH\u3084ESP\u306e\u30d1\u30b1\u30c3\u30c8\u30d8\u30c3\u30c0\u306b\u542b\u307e\u308c\u308bSPI\u306e\u5024\u306b\u3088\u3063\u3066\u3001\u305d\u306e\u30d1\u30b1\u30c3\u30c8\u304c\u3069\u306eSA\u306b\u57fa\u3065\u304f\u901a\u4fe1\u306a\u306e\u304b\u3092\u5224\u5225\u3067\u304d\u308b\u4ed5\u7d44\u307f\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5404VPN\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u306f\u6709\u52b9\u306aSA\u306e\u60c5\u5831\u3092<strong><span class=\"swl-marker mark_yellow\">SA\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\uff08SAD: Security Association Database\uff09<\/span><\/strong>\u306b\u4fdd\u5b58\u3057\u3066\u304a\u308a\u3001SPI\u3092\u30ad\u30fc\u3068\u3057\u3066\u9069\u5207\u306a\u51e6\u7406\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SA\u3092\u69cb\u6210\u3059\u308b\u8981\u7d20<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SA\u306f\u5358\u306a\u308b\u300c\u63a5\u7d9a\u306e\u6982\u5ff5\u300d\u3067\u306f\u306a\u304f\u3001\u5b9f\u969b\u306b\u306fIPsec\u901a\u4fe1\u3092\u884c\u3046\u305f\u3081\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u96c6\u5408\u4f53\u3067\u3059\u3002\u305d\u306e\u5185\u5bb9\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SPI\uff08\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30d1\u30e9\u30e1\u30fc\u30bf\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff09<\/li>\n\n\n\n<li>\u5229\u7528\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\uff08AH \u307e\u305f\u306f ESP\uff09<\/li>\n\n\n\n<li>\u901a\u4fe1\u30e2\u30fc\u30c9\uff08\u30c8\u30f3\u30cd\u30eb\u30e2\u30fc\u30c9 \u307e\u305f\u306f \u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\uff09<\/li>\n\n\n\n<li>\u6697\u53f7\u5316\u65b9\u5f0f\uff08DES\u30013DES\u3001AES\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u6697\u53f7\u9375<\/li>\n\n\n\n<li>\u8a8d\u8a3c\u65b9\u5f0f\uff08HMAC-MD5\u3001HMAC-SHA1\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u8a8d\u8a3c\u9375<\/li>\n\n\n\n<li>\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\u30ab\u30a6\u30f3\u30bf\uff08\u30ea\u30d7\u30ec\u30a4\u653b\u6483\u9632\u6b62\u7528\uff09<\/li>\n\n\n\n<li>DSCP\u5024\uff08\u30b5\u30fc\u30d3\u30b9\u54c1\u8cea\u306b\u95a2\u9023\uff09<\/li>\n\n\n\n<li>Path MTU\uff08\u6700\u5927\u8ee2\u9001\u5358\u4f4d\u306e\u7ba1\u7406\uff09<\/li>\n\n\n\n<li>\u30c8\u30f3\u30cd\u30eb\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306eIP\u30a2\u30c9\u30ec\u30b9<\/li>\n\n\n\n<li>SA\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\uff08\u6709\u52b9\u671f\u9593\uff09<\/li>\n<\/ul>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u3067\u306f\u300cSA\u306f\u4e00\u65b9\u5411\u306e\u30c8\u30f3\u30cd\u30eb\u3067\u3042\u308a\u3001\u9001\u4fe1\u3068\u53d7\u4fe1\u306b\u305d\u308c\u305e\u308c\u5fc5\u8981\u306b\u306a\u308b\u300d\u3068\u3044\u3046\u70b9\u3084\u300cSPI\u306b\u3088\u3063\u3066SA\u304c\u8b58\u5225\u3055\u308c\u308b\u300d\u3068\u3044\u3046\u70b9\u304c\u72d9\u308f\u308c\u3084\u3059\u3044\u306e\u3067\u7279\u306b\u6ce8\u610f\u3057\u3066\u899a\u3048\u3066\u304a\u304f\u3068\u826f\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SPD\uff08Security Policy Database\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SA\u3068\u95a2\u9023\u3057\u3066\u3001\u3082\u3046\u4e00\u3064\u91cd\u8981\u306a\u306e\u304c<strong><span class=\"swl-marker mark_yellow\">SPD\uff08\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30dd\u30ea\u30b7\u30fc\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\uff09<\/span><\/strong>\u3067\u3059\u3002SPD\u306f\u300c\u3069\u306e\u901a\u4fe1\u3092IPsec\u3067\u51e6\u7406\u3059\u308b\u304b\u300d\u300c\u3069\u306e\u901a\u4fe1\u306fIPsec\u3092\u901a\u3055\u306a\u3044\u304b\u300d\u3068\u3044\u3063\u305f\u30eb\u30fc\u30eb\u3092\u5b9a\u3081\u305f\u3082\u306e\u3067\u3059\u3002Cisco\u30eb\u30fc\u30bf\u306e\u8a2d\u5b9a\u3067\u306f\u3001\u3053\u306eSPD\u306f\u30a2\u30af\u30bb\u30b9\u30ea\u30b9\u30c8\uff08ACL\uff09\u3068\u3057\u3066\u8868\u73fe\u3055\u308c\u3001\u5bfe\u8c61\u3068\u306a\u308b\u901a\u4fe1\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u3064\u307e\u308a\u3001SPD\u3067\u901a\u4fe1\u5bfe\u8c61\u3092\u6c7a\u5b9a\u3057\u3001\u305d\u306e\u5f8cSAD\u306b\u4fdd\u5b58\u3055\u308c\u305fSA\u306e\u5185\u5bb9\u3092\u3082\u3068\u306b\u6697\u53f7\u5316\u3084\u8a8d\u8a3c\u304c\u884c\u308f\u308c\u308b\u3068\u3044\u3046\u6d41\u308c\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u306f\u8a66\u9a13\u3067\u3082\u300cSPD\u306f\u4f55\u3092\u6c7a\u3081\u308b\u3082\u306e\u304b\u300d\u3068\u3044\u3063\u305f\u5f62\u3067\u554f\u308f\u308c\u308b\u3053\u3068\u304c\u3042\u308b\u306e\u3067\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u25c6\u307e\u3068\u3081\u30b9\u30e9\u30a4\u30c9<\/h2>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/ccna-curriculum.tech-village.co.jp\/wp-content\/uploads\/2025\/06\/IPsec.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"IPsec\u306e\u57cb\u3081\u8fbc\u307f\u3002\"><\/object><a id=\"wp-block-file--media-bb0965ff-ad45-4ec2-b4a1-591c39549c35\" href=\"https:\/\/ccna-curriculum.tech-village.co.jp\/wp-content\/uploads\/2025\/06\/IPsec.pdf\">IPsec<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>IPsec\u3068\u306f\u4f55\u304b IPsec\uff08\u30a2\u30a4\u30d4\u30fc\u30bb\u30c3\u30af\uff09\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u3088\u3046\u306a\u516c\u958b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u3082\u5b89\u5168\u306b\u901a\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u3067\u52d5\u4f5c\u3057\u3001\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3057\u305f\u308a\u3001\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3057\u305f\u308a\u3059 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[15],"tags":[],"class_list":["post-332","post","type-post","status-publish","format-standard","hentry","category-security"],"_links":{"self":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=332"}],"version-history":[{"count":4,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/332\/revisions"}],"predecessor-version":[{"id":825,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/332\/revisions\/825"}],"wp:attachment":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}