{"id":330,"date":"2025-06-14T15:28:00","date_gmt":"2025-06-14T06:28:00","guid":{"rendered":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=330"},"modified":"2025-10-18T11:44:36","modified_gmt":"2025-10-18T02:44:36","slug":"vpn","status":"publish","type":"post","link":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=330","title":{"rendered":"VPN"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">VPN\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">VPN\uff08Virtual Private Network\uff09<\/span><\/strong>\u306f\u3001\u65e5\u672c\u8a9e\u3067\u300c\u4eee\u60f3\u7684\u306a\u5c02\u7528\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u300d\u3068\u8868\u73fe\u3055\u308c\u307e\u3059\u3002\u901a\u5e38\u3001\u4f01\u696d\u304c\u62e0\u70b9\u9593\u3067\u901a\u4fe1\u3059\u308b\u969b\u306b\u306f\u5c02\u7528\u7dda\u3084\u5e83\u57df\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306a\u3069\u3092\u5229\u7528\u3057\u3066\u3044\u307e\u3057\u305f\u304c\u3001VPN\u3092\u7528\u3044\u308c\u3070\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3068\u3044\u3063\u305f\u516c\u8846\u7db2\u306e\u4e0a\u306b\u6697\u53f7\u5316\u3055\u308c\u305f\u4eee\u60f3\u56de\u7dda\u3092\u69cb\u7bc9\u3067\u304d\u308b\u305f\u3081\u3001\u5b89\u5168\u306b\u901a\u4fe1\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306bIPsec\u306a\u3069\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6280\u8853\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u76d7\u8074\u3084\u6539\u3056\u3093\u3092\u9632\u6b62\u3057\u306a\u304c\u3089\u4f01\u696dWAN\u3092\u4f4e\u30b3\u30b9\u30c8\u3067\u5b9f\u73fe\u3067\u304d\u308b\u306e\u304c\u5927\u304d\u306a\u30e1\u30ea\u30c3\u30c8\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">VPN\u306e\u7279\u5fb4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">VPN\u3092\u5229\u7528\u3059\u308b\u3068\u3001\u5f93\u6765\u306f\u9ad8\u984d\u3060\u3063\u305fWAN\u63a5\u7d9a\u30b3\u30b9\u30c8\u3092\u524a\u6e1b\u3067\u304d\u3001\u4f8b\u3048\u3070FTTH\u306e\u3088\u3046\u306a\u5b89\u4fa1\u3067\u5e83\u5e2f\u57df\u306a\u56de\u7dda\u3092WAN\u56de\u7dda\u3068\u3057\u3066\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001VPN\u3067\u306f\u6697\u53f7\u5316\u3084\u30ab\u30d7\u30bb\u30eb\u5316\u306b\u3088\u3063\u3066\u5143\u306eIP\u30d1\u30b1\u30c3\u30c8\u306b\u30d8\u30c3\u30c0\u30fc\u304c\u8ffd\u52a0\u3055\u308c\u308b\u305f\u3081\u3001\u30d1\u30b1\u30c3\u30c8\u306e\u30b5\u30a4\u30ba\u304c\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u901a\u5e38\u3088\u308a\u3082MSS\uff08Maximum Segment Size\uff09\u3092\u5c0f\u3055\u304f\u8abf\u6574\u3057\u306a\u3044\u3068\u901a\u4fe1\u52b9\u7387\u304c\u60aa\u5316\u3059\u308b\u70b9\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">VPN\u306e\u7a2e\u985e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">VPN\u306f\u5927\u304d\u304f\u300c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8VPN\u300d\u3068\u300cIP-VPN\u300d\u306b\u5206\u985e\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8VPN<\/strong><br>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306a\u3069\u306e\u516c\u8846\u56de\u7dda\u3092\u5229\u7528\u3057\u3001IPsec\u3084SSL\u3092\u7528\u3044\u3066\u901a\u4fe1\u3092\u6697\u53f7\u5316\u3057\u307e\u3059\u3002\n<ul class=\"wp-block-list\">\n<li><strong>IPsec-VPN<\/strong>\uff1aIPsec\u3092\u5229\u7528\u3057\u3066\u30eb\u30fc\u30bf\u3084VPN\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u9593\u306e\u901a\u4fe1\u3092\u6697\u53f7\u5316<\/li>\n\n\n\n<li><strong>SSL-VPN<\/strong>\uff1aSSL\/TLS\u3092\u5229\u7528\u3057\u3001Web\u30d6\u30e9\u30a6\u30b6\u3084\u5c02\u7528\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u5b89\u5168\u306a\u63a5\u7d9a\u3092\u5b9f\u73fe<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>IP-VPN\uff08MPLS-VPN\uff09<\/strong><br>\u901a\u4fe1\u4e8b\u696d\u8005\u304c\u63d0\u4f9b\u3059\u308b\u9589\u57dfIP\u7db2\u3092\u5229\u7528\u3057\u305fVPN\u3067\u3059\u3002MPLS\u3092\u7528\u3044\u3066\u7d4c\u8def\u60c5\u5831\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u901a\u3089\u305a\u3001\u3088\u308a\u5b89\u5b9a\u3057\u305f\u54c1\u8cea\u3092\u78ba\u4fdd\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8VPN\u306e\u30bf\u30a4\u30d7<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8VPN\u306b\u306f\u3001\u5229\u7528\u5f62\u614b\u306b\u5fdc\u3058\u30662\u3064\u306e\u30bf\u30a4\u30d7\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30b5\u30a4\u30c8\u9593VPN<\/strong><br>\u4f01\u696d\u306e\u8907\u6570\u62e0\u70b9\u3092\u30eb\u30fc\u30bf\u540c\u58eb\u3067\u63a5\u7d9a\u3059\u308b\u65b9\u5f0f\u3067\u3059\u3002\u6697\u53f7\u5316\u3084\u5fa9\u53f7\u306e\u51e6\u7406\u306f\u3059\u3079\u3066\u30eb\u30fc\u30bf\uff08VPN\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\uff09\u304c\u884c\u3046\u305f\u3081\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC\u306b\u7279\u5225\u306a\u30bd\u30d5\u30c8\u3092\u5165\u308c\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u62e0\u70b9\u9593\u901a\u4fe1\u3067\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30ea\u30e2\u30fc\u30c8\u30a2\u30af\u30bb\u30b9VPN<\/strong><br>\u81ea\u5b85\u3084\u5916\u51fa\u5148\u306ePC\u30fb\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u304b\u3089\u793e\u5185\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u5b89\u5168\u306b\u63a5\u7d9a\u3059\u308b\u65b9\u5f0f\u3067\u3059\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u7aef\u672b\u306b\u306fVPN\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\uff08\u4f8b\uff1aCisco AnyConnect\uff09\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3001VPN\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u3068\u76f4\u63a5\u6697\u53f7\u5316\u901a\u4fe1\u3092\u884c\u3044\u307e\u3059\u3002\u30c6\u30ec\u30ef\u30fc\u30af\u3084\u5916\u51fa\u5148\u304b\u3089\u306e\u696d\u52d9\u5229\u7528\u3067\u591a\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a<br>\u30fbVPN\u306f\u300c\u5c02\u7528\u7dda\u306e\u3088\u3046\u306a\u5b89\u5168\u6027\u3092\u3001\u516c\u8846\u7db2\u4e0a\u3067\u5b9f\u73fe\u3059\u308b\u6280\u8853\u300d\u3068\u7406\u89e3\u3059\u308b\u3053\u3068<br>\u30fb\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8VPN\u3068IP-VPN\u306e\u9055\u3044\u3092\u6574\u7406\u3057\u3066\u899a\u3048\u308b<br>\u30fb\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8VPN\u306b\u306f <strong>IPsec-VPN\u3068SSL-VPN<\/strong> \u306e2\u7a2e\u985e\u304c\u3042\u308b<br>\u30fb\u63a5\u7d9a\u5f62\u614b\u306b\u306f <strong>\u30b5\u30a4\u30c8\u9593VPN\u3068\u30ea\u30e2\u30fc\u30c8\u30a2\u30af\u30bb\u30b9VPN<\/strong> \u304c\u3042\u308b<br><br>\u3053\u308c\u3089\u306fCCNA\u8a66\u9a13\u3067\u3082\u983b\u51fa\u30c6\u30fc\u30de\u306a\u306e\u3067\u3001\u4ed5\u7d44\u307f\u3068\u7279\u5fb4\u3092\u3057\u3063\u304b\u308a\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">VPN\u306b\u304a\u3051\u308b\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u3068\u6697\u53f7\u5316<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">VPN\u304c\u5b89\u5168\u306a\u901a\u4fe1\u3092\u5b9f\u73fe\u3067\u304d\u308b\u306e\u306f\u3001<strong>\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0<\/strong>\u3068<strong>\u6697\u53f7\u5316<\/strong>\u3068\u3044\u30462\u3064\u306e\u4ed5\u7d44\u307f\u306b\u3088\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0<\/strong>\u306f\u3001\u516c\u8846\u56de\u7dda\uff08\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306a\u3069\uff09\u306e\u4e0a\u306b\u4eee\u60f3\u7684\u306a\u5c02\u7528\u56de\u7dda\u3092\u69cb\u7bc9\u3059\u308b\u6280\u8853\u3067\u3001\u3042\u305f\u304b\u3082\u76f4\u63a5\u3064\u306a\u304c\u3063\u3066\u3044\u308b\u304b\u306e\u3088\u3046\u306b\u901a\u4fe1\u3092\u884c\u3048\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u6697\u53f7\u5316<\/strong>\u306f\u3001\u901a\u4fe1\u30c7\u30fc\u30bf\u3092\u7b2c\u4e09\u8005\u306b\u8aad\u3081\u306a\u3044\u3088\u3046\u306b\u5909\u63db\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3001\u76d7\u8074\u3084\u6539\u3056\u3093\u3092\u9632\u304e\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">VPN\u3067\u5229\u7528\u3055\u308c\u308b\u4ee3\u8868\u7684\u306a\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u306f <strong>PPTP\u3001L2F\u3001L2TP\u3001GRE\u3001IPsec<\/strong> \u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u4e2d\u3067<strong>\u6697\u53f7\u5316\u6a5f\u80fd\u3092\u6301\u3064\u306e\u306fIPsec\u306e\u307f<\/strong>\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u4ed6\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4f7f\u3046\u5834\u5408\u306f\u6697\u53f7\u5316\u306e\u305f\u3081\u306bIPsec\u3092\u4f75\u7528\u3059\u308b\u30b1\u30fc\u30b9\u304c\u591a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">VPN\u306b\u95a2\u9023\u3059\u308b\u57fa\u672c\u7528\u8a9e<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30c8\u30f3\u30cd\u30eb<\/strong>\uff1a\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306a\u3069\u306e\u516c\u8846\u7db2\u306b\u69cb\u7bc9\u3055\u308c\u305f\u4eee\u60f3\u7684\u306a\u5c02\u7528\u56de\u7dda<\/li>\n\n\n\n<li><strong>\u6697\u53f7\u5316<\/strong>\uff1a\u5e73\u6587\uff08\u3082\u3068\u306e\u30c7\u30fc\u30bf\uff09\u3092\u89e3\u8aad\u4e0d\u80fd\u306a\u6697\u53f7\u6587\u306b\u5909\u63db\u3059\u308b\u51e6\u7406<\/li>\n\n\n\n<li><strong>\u5fa9\u53f7<\/strong>\uff1a\u6697\u53f7\u6587\u3092\u3082\u3068\u306e\u5e73\u6587\u306b\u623b\u3059\u51e6\u7406<\/li>\n\n\n\n<li><strong>\u30cf\u30c3\u30b7\u30e5\u95a2\u6570<\/strong>\uff1a\u5165\u529b\u30c7\u30fc\u30bf\u304b\u3089\u56fa\u5b9a\u9577\u306e\u8981\u7d04\u5024\u3092\u751f\u6210\u3059\u308b\u6f14\u7b97\uff08\u4f8b\uff1aSHA\u3001MD5\uff09<\/li>\n\n\n\n<li><strong>\u8a8d\u8a3c<\/strong>\uff1a\u5229\u7528\u8005\u3084\u30d7\u30ed\u30bb\u30b9\u306e\u8eab\u5143\u3092\u78ba\u8a8d\u3059\u308b\u624b\u7d9a\u304d<\/li>\n\n\n\n<li><strong>\u8a8d\u53ef<\/strong>\uff1a\u8a8d\u8a3c\u6e08\u307f\u306e\u5229\u7528\u8005\u306b\u9069\u5207\u306a\u30a2\u30af\u30bb\u30b9\u6a29\u3092\u4e0e\u3048\u308b\u3053\u3068<\/li>\n\n\n\n<li><strong>\u516c\u958b\u9375\u6697\u53f7\u65b9\u5f0f<\/strong>\uff1a\u516c\u958b\u9375\u3068\u79d8\u5bc6\u9375\u306e\u30da\u30a2\u3092\u7528\u3044\u305f\u6697\u53f7\u5316\u65b9\u5f0f<\/li>\n\n\n\n<li><strong>\u5171\u901a\u9375\u6697\u53f7\u65b9\u5f0f<\/strong>\uff1a\u6697\u53f7\u5316\u3068\u5fa9\u53f7\u306b\u540c\u3058\u9375\u3092\u4f7f\u3046\u65b9\u5f0f<\/li>\n\n\n\n<li><strong>CA\uff08\u8a8d\u8a3c\u5c40\uff09<\/strong>\uff1a\u30c7\u30b8\u30bf\u30eb\u8a3c\u660e\u66f8\u306e\u767a\u884c\u30fb\u7ba1\u7406\u3092\u884c\u3046\u4fe1\u983c\u6a5f\u95a2<\/li>\n\n\n\n<li><strong>Diffie-Hellman\u9375\u4ea4\u63db<\/strong>\uff1a\u5171\u901a\u9375\u3092\u5b89\u5168\u306b\u3084\u308a\u53d6\u308a\u3059\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3b\u306aVPN\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u6bd4\u8f03<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">VPN\u3067\u5229\u7528\u3055\u308c\u308b\u4e3b\u8981\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u306f\u305d\u308c\u305e\u308c\u5f97\u610f\u5206\u91ce\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u6ce8\u76ee\u3059\u3079\u304d\u306f\u3001<strong><span class=\"swl-marker mark_yellow\">IPsec\u306f\u6697\u53f7\u5316\u3082\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u3082\u5358\u72ec\u3067\u53ef\u80fd\u3060\u304c\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u901a\u4fe1\u306f\u6271\u3048\u306a\u3044<\/span><\/strong>\u3068\u3044\u3046\u70b9\u3067\u3059\u3002\u3053\u306e\u305f\u3081\u3001OSPF\u306a\u3069\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u62e0\u70b9\u9593\u3067\u4f7f\u3046\u5834\u5408\u306f\u3001GRE\u3068IPsec\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\uff08GRE over IPsec\uff09\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>VPN\u30d7\u30ed\u30c8\u30b3\u30eb<\/th><th>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8<\/th><th>\u4f1d\u9001\u3067\u304d\u308b\u30d7\u30ed\u30c8\u30b3\u30eb<\/th><th>\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u5bfe\u5fdc<\/th><th>\u6697\u53f7\u5316<\/th><th>\u4e3b\u306a\u5229\u7528\u4f8b<\/th><\/tr><\/thead><tbody><tr><td><strong>IPsec<\/strong><\/td><td>IP<\/td><td>L3\uff08IP\uff09<\/td><td>\u00d7<\/td><td>\u25cb<\/td><td>\u30b5\u30a4\u30c8\u9593VPN\uff08\u30e6\u30cb\u30ad\u30e3\u30b9\u30c8\u901a\u4fe1\uff09<\/td><\/tr><tr><td><strong>GRE<\/strong><\/td><td>IP<\/td><td>L3\uff08IP, IPX\u306a\u3069\uff09<\/td><td>\u25cb<\/td><td>\u00d7<\/td><td>\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\uff08GRE\/IPsec\u4f75\u7528\uff09<\/td><\/tr><tr><td><strong>L2TP<\/strong><\/td><td>UDP\/IP, ATM<\/td><td>L2\uff08PPP\uff09\u3001L3\u5168\u822c<\/td><td>\u25cb<\/td><td>\u00d7<\/td><td>PPP\u62e1\u5f35\u3001\u8a8d\u8a3c\u5f37\u5316\uff08L2TP\/IPsec\u4f75\u7528\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a<br>\u30fb<strong>IPsec\u5358\u72ec\u3067\u306f\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u4e0d\u53ef<\/strong> \u2192 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u5229\u7528\u6642\u306f <strong>GRE\/IPsec<\/strong><br>\u30fb<strong>L2TP\u306fPPP\u3092\u62e1\u5f35\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb<\/strong> \u2192 \u6697\u53f7\u5316\u306f\u3067\u304d\u306a\u3044\u306e\u3067 <strong>L2TP\/IPsec<\/strong> \u304c\u5b9f\u52d9\u3067\u5229\u7528\u3055\u308c\u308b<br>\u30fb<strong>GRE\u306f\u591a\u69d8\u306a\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u53ef\u80fd<\/strong> \u2192 \u62e0\u70b9\u9593\u3067OSPF\u3084EIGRP\u3092\u4f7f\u3046\u969b\u306b\u5fc5\u9808<br><br>\u3053\u3053\u306fCCNA\u3067\u983b\u51fa\u306e\u9818\u57df\u306a\u306e\u3067\u300cIPsec\u3060\u3051\u3067\u5341\u5206\u306a\u306e\u304b\uff1f\u300d\u300c\u306a\u305cGRE\u3092\u4f75\u7528\u3059\u308b\u306e\u304b\uff1f\u300d\u3068\u3044\u3046\u89b3\u70b9\u3067\u6574\u7406\u3057\u3066\u304a\u304f\u3068\u8a66\u9a13\u3067\u5f37\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6697\u53f7\u30b7\u30b9\u30c6\u30e0\u306e\u6982\u8981<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">VPN\u306f\u5358\u306b\u300c\u30c8\u30f3\u30cd\u30eb\u3092\u5f35\u308b\u300d\u3060\u3051\u3067\u306f\u5b89\u5168\u6027\u3092\u78ba\u4fdd\u3067\u304d\u307e\u305b\u3093\u3002\u305d\u306e\u88cf\u3067\u306f\u3001\u8907\u6570\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6280\u8853\u304c\u7d44\u307f\u5408\u308f\u3055\u3063\u3066\u6a5f\u80fd\u3057\u3066\u3044\u307e\u3059\u3002\u4ee3\u8868\u7684\u306a\u8981\u7d20\u306f <strong>\u9375\u7ba1\u7406\u3001\u6697\u53f7\u5316\u3001\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u3001\u8a8d\u8a3c<\/strong> \u306e4\u3064\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u305d\u308c\u305e\u308c\u306e\u6982\u8981\u3092\u6574\u7406\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u9375\u7ba1\u7406\u65b9\u5f0f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">VPN\u3067\u5b89\u5168\u306b\u901a\u4fe1\u3059\u308b\u306b\u306f\u3001\u307e\u305a\u300c\u6697\u53f7\u5316\u306b\u4f7f\u3046\u9375\u300d\u3092\u3069\u3046\u3084\u3063\u3066\u76f8\u624b\u306b\u6e21\u3059\u304b\u3092\u6c7a\u3081\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<br>IPsec\u3067\u306f <strong>Diffie-Hellman\u9375\u4ea4\u63db\u65b9\u5f0f<\/strong> \u3092\u4f7f\u3044\u3001\u5b89\u5168\u3067\u306a\u3044\u901a\u4fe1\u8def\u3067\u3082\u6697\u53f7\u9375\u3092\u76d7\u8074\u3055\u308c\u305a\u306b\u5171\u6709\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3092\u5b9f\u73fe\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6697\u53f7\u5316\u65b9\u5f0f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u4fe1\u30c7\u30fc\u30bf\u305d\u306e\u3082\u306e\u3092\u79d8\u533f\u3059\u308b\u6280\u8853\u304c\u6697\u53f7\u5316\u3067\u3059\u3002\u4ee3\u8868\u7684\u306a\u65b9\u5f0f\u306f2\u7a2e\u985e\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5171\u901a\u9375\u6697\u53f7\u65b9\u5f0f<\/strong><br>\u6697\u53f7\u5316\u3068\u5fa9\u53f7\u306b\u540c\u3058\u9375\u3092\u4f7f\u3046\u65b9\u5f0f\u3002AES\u30843DES\u306a\u3069\u304c\u4ee3\u8868\u7684\u3067\u3001\u51e6\u7406\u304c\u901f\u3044\u305f\u3081\u5b9f\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u306b\u591a\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u516c\u958b\u9375\u6697\u53f7\u65b9\u5f0f<\/strong><br>\u6697\u53f7\u5316\u3068\u5fa9\u53f7\u306b\u7570\u306a\u308b\u9375\uff08\u516c\u958b\u9375\u3068\u79d8\u5bc6\u9375\uff09\u3092\u4f7f\u3046\u65b9\u5f0f\u3002RSA\u306a\u3069\u304c\u4ee3\u8868\u7684\u3002\u51e6\u7406\u306f\u9045\u3044\u3067\u3059\u304c\u3001\u5b89\u5168\u306a\u9375\u4ea4\u63db\u3084\u30c7\u30b8\u30bf\u30eb\u7f72\u540d\u306b\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u30cf\u30c3\u30b7\u30e5\u95a2\u6570<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u30cf\u30c3\u30b7\u30e5\u95a2\u6570<\/strong>\u306f\u3001\u4e0e\u3048\u3089\u308c\u305f\u30c7\u30fc\u30bf\u304b\u3089\u56fa\u5b9a\u9577\u306e\u300c\u8981\u7d04\u5024\u300d\u3092\u751f\u6210\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u4ee3\u8868\u4f8b\u306f <strong>MD5<\/strong> \u3084 <strong>SHA<\/strong>\u3002<br>\u3053\u308c\u81ea\u4f53\u306b\u306f\u6697\u53f7\u5316\u6a5f\u80fd\u306f\u306a\u304f\u3001\u6539\u3056\u3093\u691c\u77e5\u3084\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u78ba\u8a8d\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u53d7\u4fe1\u5074\u304c\u518d\u5ea6\u30cf\u30c3\u30b7\u30e5\u3092\u8a08\u7b97\u3057\u3066\u7167\u5408\u3059\u308b\u3053\u3068\u3067\u3001\u9014\u4e2d\u3067\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8a8d\u8a3c\u65b9\u5f0f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a8d\u8a3c\u306e\u4ed5\u7d44\u307f\u306b\u306f <strong>HMAC<\/strong> \u3068 <strong>\u30c7\u30b8\u30bf\u30eb\u7f72\u540d<\/strong> \u306e2\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>HMAC\uff08Hash-based Message Authentication Code\uff09<\/strong><br>\u5171\u901a\u9375\u3068\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u30c7\u30fc\u30bf\u306e\u6539\u3056\u3093\u3092\u691c\u77e5\u3057\u307e\u3059\u3002\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u306b\u306fMD5\u3084SHA\u304c\u4f7f\u3048\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c7\u30b8\u30bf\u30eb\u7f72\u540d<\/strong><br>\u516c\u958b\u9375\u6697\u53f7\u3092\u5fdc\u7528\u3057\u305f\u4ed5\u7d44\u307f\u3067\u3001\u9001\u4fe1\u8005\u306e\u6b63\u5f53\u6027\u3068\u30c7\u30fc\u30bf\u306e\u6539\u3056\u3093\u691c\u77e5\u3092\u540c\u6642\u306b\u5b9f\u73fe\u3057\u307e\u3059\u3002SHA\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u5229\u7528\u3055\u308c\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">IPsec\u306b\u304a\u3051\u308b\u5229\u7528\u4f8b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPsec-VPN\u3067\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u57fa\u672c\u8981\u7d20\u304c\u6b21\u306e\u3088\u3046\u306b\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>IKE\uff08Internet Key Exchange\uff09<\/strong> \u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u4ea4\u63db\u3067\u3001Diffie-Hellman\u3092\u7528\u3044\u305f\u5b89\u5168\u306a\u9375\u5171\u6709\u3092\u5b9f\u73fe<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u306b\u306f\u5171\u901a\u9375\u6697\u53f7\uff08AES\u306a\u3069\uff09\u3092\u5229\u7528<\/li>\n\n\n\n<li>\u6539\u3056\u3093\u691c\u77e5\u306b\u306f\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\uff08MD5\u3084SHA\uff09\u3092\u5229\u7528<\/li>\n\n\n\n<li>\u8a8d\u8a3c\u306b\u306fHMAC\u307e\u305f\u306f\u30c7\u30b8\u30bf\u30eb\u7f72\u540d\u3092\u5229\u7528<\/li>\n<\/ul>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a<br>\u30fb<strong>Diffie-Hellman = \u9375\u4ea4\u63db\u65b9\u5f0f<\/strong> \u3068\u3057\u3066\u5fc5\u305a\u62bc\u3055\u3048\u308b<br>\u30fb<strong>\u5171\u901a\u9375\u6697\u53f7\u306f\u9ad8\u901f\u3001\u516c\u958b\u9375\u6697\u53f7\u306f\u5b89\u5168\u6027\u91cd\u8996<\/strong> \u3068\u3044\u3046\u5bfe\u6bd4\u3092\u7406\u89e3\u3059\u308b<br>\u30fb<strong>\u30cf\u30c3\u30b7\u30e5\u306f\u6697\u53f7\u5316\u3067\u306f\u306a\u304f\u6574\u5408\u6027\u30c1\u30a7\u30c3\u30af<\/strong> \u306b\u5229\u7528\u3055\u308c\u308b<br>\u30fb<strong>HMAC\u306f\u5171\u901a\u9375\u3001\u30c7\u30b8\u30bf\u30eb\u7f72\u540d\u306f\u516c\u958b\u9375\u3092\u4f7f\u3046\u8a8d\u8a3c\u65b9\u5f0f<\/strong><br><br>\u3053\u3053\u306fIPsec\u306e\u7406\u89e3\u306b\u76f4\u7d50\u3059\u308b\u90e8\u5206\u3067\u3001CCNA\u3067\u3082\u51fa\u984c\u3055\u308c\u3084\u3059\u3044\u91cd\u8981\u30c6\u30fc\u30de\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5171\u901a\u9375\u6697\u53f7\uff08\u5bfe\u79f0\u6697\u53f7\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">\u5171\u901a\u9375\u6697\u53f7<\/span><\/strong>\u3068\u306f\u3001\u6697\u53f7\u5316\u3068\u5fa9\u53f7\u306e\u4e21\u65b9\u3067\u540c\u3058\u9375\u3092\u5229\u7528\u3059\u308b\u65b9\u5f0f\u306e\u3053\u3068\u3067\u3059\u3002\u3053\u306e\u9375\u3092\u300c\u5171\u901a\u9375\u300d\u307e\u305f\u306f\u300c\u79d8\u5bc6\u9375\u300d\u3068\u547c\u3073\u307e\u3059\u3002\u5225\u540d\u300c\u5bfe\u79f0\u6697\u53f7\u300d\u3068\u3082\u8a00\u308f\u308c\u307e\u3059\u3002<br>\u305f\u3068\u3048\u3070\u3001\u53cb\u9054\u3068\u5408\u8a00\u8449\u3092\u6c7a\u3081\u3066\u304a\u3044\u3066\u3001\u305d\u306e\u5408\u8a00\u8449\u3092\u77e5\u3063\u3066\u3044\u308b\u4eba\u3060\u3051\u304c\u6697\u53f7\u6587\u3092\u8aad\u3081\u308b\u3088\u3046\u306b\u3059\u308b\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee3\u8868\u7684\u306a\u65b9\u5f0f\u306b\u306f RC4\u3001DES\u30013DES\u3001AES \u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u73fe\u5728\u306e\u6a19\u6e96\u3068\u3057\u3066\u6700\u3082\u5f37\u529b\u3068\u3055\u308c\u308b\u306e\u306f AES \u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u3067\u3082\u300c\u5171\u901a\u9375\u6697\u53f7\u306e\u4e2d\u3067\u5f37\u5ea6\u304c\u6700\u3082\u9ad8\u3044\u306e\u306f\u3069\u308c\u304b\u300d\u3068\u3044\u3063\u305f\u554f\u984c\u304c\u3088\u304f\u51fa\u984c\u3055\u308c\u307e\u3059\u306e\u3067\u3001AES\u3092\u7b54\u3048\u3089\u308c\u308b\u3088\u3046\u306b\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u516c\u958b\u9375\u6697\u53f7\uff08\u975e\u5bfe\u79f0\u6697\u53f7\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">\u516c\u958b\u9375\u6697\u53f7<\/span><\/strong>\u306f\u30012\u3064\u306e\u7570\u306a\u308b\u9375\u3092\u30da\u30a2\u3067\u4f7f\u7528\u3059\u308b\u65b9\u5f0f\u3067\u3059\u3002\u6697\u53f7\u5316\u306b\u4f7f\u3046\u306e\u304c\u300c\u516c\u958b\u9375\u300d\u3001\u5fa9\u53f7\u306b\u4f7f\u3046\u306e\u304c\u300c\u79d8\u5bc6\u9375\u300d\u3067\u3059\u3002<br>\u9001\u4fe1\u8005\u306f\u53d7\u4fe1\u8005\u304c\u516c\u958b\u3057\u3066\u3044\u308b\u300c\u516c\u958b\u9375\u300d\u3092\u4f7f\u3063\u3066\u6697\u53f7\u5316\u3057\u3001\u53d7\u4fe1\u8005\u306f\u81ea\u5206\u3060\u3051\u304c\u6301\u3064\u300c\u79d8\u5bc6\u9375\u300d\u3067\u5fa9\u53f7\u3057\u307e\u3059\u3002\u516c\u958b\u9375\u306f\u8ab0\u306b\u77e5\u3089\u308c\u3066\u3082\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u79d8\u5bc6\u9375\u3092\u6301\u3064\u672c\u4eba\u3060\u3051\u304c\u6697\u53f7\u3092\u89e3\u3051\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5171\u901a\u9375\u6697\u53f7\u3067\u306f\u300c\u9375\u3092\u76f8\u624b\u306b\u5b89\u5168\u306b\u6e21\u3059\u65b9\u6cd5\u300d\u304c\u8ab2\u984c\u3067\u3057\u305f\u304c\u3001\u516c\u958b\u9375\u6697\u53f7\u3067\u306f\u305d\u306e\u5fc5\u8981\u304c\u306a\u3044\u70b9\u304c\u5927\u304d\u306a\u30e1\u30ea\u30c3\u30c8\u3067\u3059\u3002\u4ee3\u8868\u7684\u306a\u65b9\u5f0f\u306b\u306f RSA \u3068 ElGamal \u304c\u3042\u308a\u3001Cisco\u30eb\u30fc\u30bf\u3067\u306f\u4e3b\u306b RSA \u304c\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u3053\u3053\u306f\u8a66\u9a13\u3067\u300cRSA\u304c\u3069\u3061\u3089\u306e\u65b9\u5f0f\u306b\u5206\u985e\u3055\u308c\u308b\u304b\u300d\u3068\u3044\u3063\u305f\u5f62\u3067\u51fa\u3084\u3059\u3044\u306e\u3067\u3057\u3063\u304b\u308a\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Diffie-Hellman\u9375\u4ea4\u63db<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">Diffie-Hellman\uff08\u30c7\u30a3\u30d5\u30a3\u30fc\u30fb\u30d8\u30eb\u30de\u30f3\uff09\u9375\u4ea4\u63db<\/span><\/strong>\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u3088\u3046\u306a\u5b89\u5168\u3067\u306a\u3044\u901a\u4fe1\u8def\u3092\u901a\u3058\u3066\u3001\u5171\u901a\u9375\u6697\u53f7\u306b\u5fc5\u8981\u306a\u300c\u5171\u901a\u9375\u300d\u3092\u5b89\u5168\u306b\u3084\u308a\u53d6\u308a\u3059\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u3067\u91cd\u8981\u306a\u306e\u306f\u3001\u9375\u305d\u306e\u3082\u306e\u3092\u9001\u3089\u306a\u3044\u3068\u3044\u3046\u70b9\u3067\u3059\u3002\u5b9f\u969b\u306b\u306f\u4e71\u6570\u3084\u516c\u958b\u60c5\u5831\u3092\u4f7f\u3063\u3066\u3084\u308a\u53d6\u308a\u3092\u884c\u3044\u3001\u6700\u7d42\u7684\u306b\u53cc\u65b9\u304c\u540c\u3058\u5171\u901a\u9375\u3092\u5c0e\u304d\u51fa\u3057\u307e\u3059\u3002\u3053\u306e\u65b9\u6cd5\u306b\u3088\u308a\u3001\u76d7\u8074\u3055\u308c\u3066\u3082\u5171\u901a\u9375\u304c\u6f0f\u308c\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPsec\u3067\u306f\u3001IKE\uff08Internet Key Exchange\uff09\u306e\u4ed5\u7d44\u307f\u306e\u4e2d\u3067\u3001\u3053\u306eDiffie-Hellman\u9375\u4ea4\u63db\u304c\u6a19\u6e96\u7684\u306b\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u3067\u306f\u300cDiffie-Hellman\u306f\u6697\u53f7\u5316\u3067\u306f\u306a\u304f\u4f55\u306b\u4f7f\u3046\u304b\uff1f\u300d\u3068\u3044\u3046\u554f\u308f\u308c\u65b9\u304c\u591a\u3044\u306e\u3067\u3001\u300c\u5171\u901a\u9375\u306e\u4ea4\u63db\u65b9\u5f0f\u300d\u3068\u7b54\u3048\u3089\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30cf\u30c3\u30b7\u30f3\u30b0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u30cf\u30c3\u30b7\u30f3\u30b0<\/strong>\u3068\u306f\u3001\u3082\u3068\u306e\u30c7\u30fc\u30bf\u306b\u300c\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u300d\u3068\u3044\u3046\u6570\u5f0f\u3092\u304b\u3051\u3066\u3001\u56fa\u5b9a\u9577\u306e\u6587\u5b57\u5217\uff08\u30cf\u30c3\u30b7\u30e5\u5024\u3001\u30c0\u30a4\u30b8\u30a7\u30b9\u30c8\uff09\u3092\u4f5c\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u306f\u6697\u53f7\u5316\u3068\u306f\u76ee\u7684\u304c\u9055\u3044\u3001\u30c7\u30fc\u30bf\u306e\u5b8c\u5168\u6027\uff08\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\uff09\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u9577\u3044\u6587\u7ae0\u3092\u3059\u3079\u3066\u6bd4\u8f03\u3059\u308b\u306e\u306f\u5927\u5909\u3067\u3059\u304c\u3001\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u6bd4\u3079\u308c\u3070\u4e00\u77ac\u3067\u540c\u3058\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee3\u8868\u7684\u306a\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u306b\u306f MD5 \u3084 SHA-1 \u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u3067\u306f\u300c\u30cf\u30c3\u30b7\u30f3\u30b0\u306e\u76ee\u7684\u306f\u4f55\u304b\uff1f\u300d\u3068\u554f\u308f\u308c\u308b\u306e\u3067\u3001\u300c\u6697\u53f7\u5316\u3067\u306f\u306a\u304f\u5b8c\u5168\u6027\u306e\u4fdd\u8a3c\u300d\u3068\u7b54\u3048\u3089\u308c\u308b\u3088\u3046\u306b\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8a8d\u8a3c\u3068HMAC<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3089\u306b\u5f37\u56fa\u306b\u3059\u308b\u305f\u3081\u306b\u3001<strong><span class=\"swl-marker mark_yellow\">HMAC\uff08Keyed-Hashing for Message Authentication Code\uff09<\/span><\/strong>\u3068\u3044\u3046\u65b9\u5f0f\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u5171\u901a\u9375\u3068\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u9001\u4fe1\u8005\u304c\u672c\u7269\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6d41\u308c\u3092\u6574\u7406\u3059\u308b\u3068\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<br>\u9001\u4fe1\u8005\u306f\u300c\u5143\u30c7\u30fc\u30bf\u300d\u3068\u300c\u5171\u901a\u9375\u300d\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u4f5c\u308a\u3001\u305d\u308c\u3092\u30c7\u30fc\u30bf\u3068\u4e00\u7dd2\u306b\u9001\u308a\u307e\u3059\u3002\u53d7\u4fe1\u8005\u306f\u81ea\u5206\u306e\u6301\u3064\u5171\u901a\u9375\u3067\u540c\u3058\u8a08\u7b97\u3092\u884c\u3044\u3001\u30cf\u30c3\u30b7\u30e5\u5024\u304c\u4e00\u81f4\u3059\u308c\u3070\u300c\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u300d\u300c\u78ba\u304b\u306b\u6b63\u3057\u3044\u76f8\u624b\u304b\u3089\u5c4a\u3044\u305f\u300d\u3068\u5224\u65ad\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HMAC\u306b\u306f\u3001HMAC-MD5 \u3068 HMAC-SHA-1 \u304c\u3042\u308a\u3001\u5f8c\u8005\u306e\u65b9\u304c\u6697\u53f7\u5f37\u5ea6\u304c\u9ad8\u3044\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u3067\u306f\u300cHMAC\u306e\u4ed5\u7d44\u307f\u300d\u3084\u300c\u3069\u306e\u30cf\u30c3\u30b7\u30e5\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u3046\u304b\u300d\u3068\u3044\u3046\u5f62\u3067\u554f\u308f\u308c\u3084\u3059\u3044\u306e\u3067\u6574\u7406\u3057\u3066\u899a\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\/VPN.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" 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