{"id":30,"date":"2026-09-18T16:24:13","date_gmt":"2026-09-18T07:24:13","guid":{"rendered":"https:\/\/www.theipv6portal.org\/column\/ssl-certificate-basics\/"},"modified":"2026-09-18T16:24:13","modified_gmt":"2026-09-18T07:24:13","slug":"ssl-certificate-basics","status":"publish","type":"post","link":"https:\/\/www.theipv6portal.org\/column\/ssl-certificate-basics\/","title":{"rendered":"SSL\u8a3c\u660e\u66f8\u306e\u4ed5\u7d44\u307f\u3068\u78ba\u8a8d\u65b9\u6cd5 \u2014 \u6709\u52b9\u671f\u9650\u5207\u308c\u30fb\u540d\u524d\u4e0d\u4e00\u81f4\u3092\u9632\u3050"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u300c\u8a3c\u660e\u66f8\u306e\u6709\u52b9\u671f\u9650\u304c\u5207\u308c\u3066\u30b5\u30a4\u30c8\u304c\u771f\u3063\u8d64\u306b\u306a\u3063\u305f\u300d\u2014\u2014Web\u904b\u7528\u3067\u3082\u3063\u3068\u3082\u8d77\u3053\u308a\u3084\u3059\u304f\u3001\u3082\u3063\u3068\u3082\u9632\u304e\u3084\u3059\u3044\u4e8b\u6545\u3067\u3059\u3002SSL\/TLS\u8a3c\u660e\u66f8\u304c<strong>\u4f55\u3092\u8a3c\u660e\u3057\u3066\u3044\u3066\u3001\u3069\u3046\u691c\u8a3c\u3055\u308c\u3066\u3044\u308b\u306e\u304b<\/strong>\u3092\u62bc\u3055\u3048\u308b\u3068\u3001\u8b66\u544a\u306e\u539f\u56e0\u304c\u4e00\u76ee\u3067\u308f\u304b\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8a3c\u660e\u66f8\u304c\u8a3c\u660e\u3057\u3066\u3044\u308b\u306e\u306f\u300c\u3053\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u6301\u3061\u4e3b\u3060\u300d\u3068\u3044\u3046\u3053\u3068<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SSL\u8a3c\u660e\u66f8\u306b\u306f2\u3064\u306e\u5f79\u5272\u304c\u3042\u308a\u307e\u3059\u3002\u3072\u3068\u3064\u306f<strong>\u901a\u4fe1\u306e\u6697\u53f7\u5316<\/strong>\u3001\u3082\u3046\u3072\u3068\u3064\u306f<strong>\u76f8\u624b\u304c\u672c\u7269\u3067\u3042\u308b\u3053\u3068\u306e\u8a3c\u660e<\/strong>\u3067\u3059\u3002\u6df7\u540c\u3055\u308c\u304c\u3061\u3067\u3059\u304c\u3001\u8b66\u544a\u304c\u51fa\u308b\u539f\u56e0\u306f\u307b\u307c\u5f8c\u8005\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d6\u30e9\u30a6\u30b6\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u53d7\u3051\u53d6\u3063\u305f\u8a3c\u660e\u66f8\u304c<strong>\u4fe1\u983c\u3067\u304d\u308b\u8a8d\u8a3c\u5c40\u307e\u3067\u8fbf\u308c\u308b\u304b<\/strong>\u3092\u691c\u8a3c\u3057\u307e\u3059\u3002\u3053\u306e\u9023\u306a\u308a\u3092\u8a3c\u660e\u66f8\u30c1\u30a7\u30fc\u30f3\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.theipv6portal.org\/column\/wp-content\/uploads\/2026\/09\/fig-ssl-chain.png\" alt=\"\u30eb\u30fc\u30c8\u8a3c\u660e\u66f8\u2192\u4e2d\u9593\u8a3c\u660e\u66f8\u2192\u30b5\u30fc\u30d0\u30fc\u8a3c\u660e\u66f8\u3068\u3044\u3046\u8a3c\u660e\u66f8\u30c1\u30a7\u30fc\u30f3\u306e\u56f3\u3068\u3001\u30d6\u30e9\u30a6\u30b6\u304c\u8b66\u544a\u3092\u51fa\u3059\u4e3b\u306a\u539f\u56e0\u306e\u4e00\u89a7\"\/><figcaption class=\"wp-element-caption\">\u30c1\u30a7\u30fc\u30f3\u304c\u672b\u7aef\u304b\u3089\u30eb\u30fc\u30c8\u307e\u3067\u7e4b\u304c\u3063\u3066\u521d\u3081\u3066\u300c\u4fe1\u983c\u3067\u304d\u308b\u300d\u3068\u5224\u65ad\u3055\u308c\u308b<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u8b66\u544a\u304c\u51fa\u308b4\u3064\u306e\u539f\u56e0<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u6709\u52b9\u671f\u9650\u5207\u308c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3082\u3063\u3068\u3082\u591a\u3044\u539f\u56e0\u3067\u3059\u3002Let&#8217;s Encrypt\u306e\u8a3c\u660e\u66f8\u306f90\u65e5\u3068\u77ed\u3044\u305f\u3081\u81ea\u52d5\u66f4\u65b0\u304c\u524d\u63d0\u3067\u3059\u304c\u3001<strong>\u66f4\u65b0\u7528\u306ecron\u3084certbot\u306e\u30bf\u30a4\u30de\u30fc\u304c\u9759\u304b\u306b\u6b62\u307e\u3063\u3066\u3044\u308b<\/strong>\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u66f4\u65b0\u304c\u52d5\u3044\u3066\u3044\u3066\u3082\u3001Web\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u518d\u8aad\u307f\u8fbc\u307f\uff08reload\uff09\u304c\u6f0f\u308c\u3066\u3044\u3066\u53e4\u3044\u8a3c\u660e\u66f8\u304c\u914d\u4fe1\u3055\u308c\u7d9a\u3051\u308b\u3001\u3068\u3044\u3046\u30d1\u30bf\u30fc\u30f3\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bfe\u7b56\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3001<strong>\u671f\u9650\u3092\u76e3\u8996\u3057\u3066\u304a\u304f\u3053\u3068<\/strong>\u306b\u5c3d\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u540d\u524d\u306e\u4e0d\u4e00\u81f4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a3c\u660e\u66f8\u306b\u306f\u5bfe\u8c61\u306e\u30db\u30b9\u30c8\u540d\u304c\u8a18\u8f09\u3055\u308c\u3066\u304a\u308a\u3001\u30a2\u30af\u30bb\u30b9\u3057\u305fURL\u3068\u4e00\u81f4\u3057\u306a\u3051\u308c\u3070\u8b66\u544a\u306b\u306a\u308a\u307e\u3059\u3002\u5178\u578b\u7684\u306a\u306e\u306f\u6b21\u306e2\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>example.com<\/code> \u3067\u306f\u6709\u52b9\u3060\u304c <code>www.example.com<\/code> \u304c<strong>SAN\uff08Subject Alternative Name\uff09\u306b\u5165\u3063\u3066\u3044\u306a\u3044<\/strong><\/li>\n<li>\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u8a3c\u660e\u66f8\uff08<code>*.example.com<\/code>\uff09\u306f <code>a.example.com<\/code> \u3092\u30ab\u30d0\u30fc\u3059\u308b\u304c\u3001<strong><code>a.b.example.com<\/code> \u306f\u30ab\u30d0\u30fc\u3057\u306a\u3044<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u4e2d\u9593\u8a3c\u660e\u66f8\u306e\u8a2d\u5b9a\u6f0f\u308c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3084\u3063\u304b\u3044\u306a\u306e\u304c\u3053\u308c\u3067\u3059\u3002<strong>\u81ea\u5206\u306ePC\u3067\u306f\u6b63\u5e38\u306b\u898b\u3048\u308b\u306e\u306b\u3001\u7279\u5b9a\u306e\u30b9\u30de\u30db\u3084\u53e4\u3044\u7aef\u672b\u3060\u3051\u3067\u30a8\u30e9\u30fc\u306b\u306a\u308b<\/strong>\u3068\u3044\u3046\u75c7\u72b6\u3067\u73fe\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u539f\u56e0\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u304c\u30b5\u30fc\u30d0\u30fc\u8a3c\u660e\u66f8\u3060\u3051\u3092\u9001\u308a\u4e2d\u9593\u8a3c\u660e\u66f8\u3092\u9001\u3063\u3066\u3044\u306a\u3044\u3053\u3068\u3067\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u306b\u3088\u3063\u3066\u306f\u904e\u53bb\u306b\u53d6\u5f97\u3057\u305f\u4e2d\u9593\u8a3c\u660e\u66f8\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3066\u3044\u3066\u7e4b\u304c\u3063\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u74b0\u5883\u306b\u3088\u3063\u3066\u7d50\u679c\u304c\u5909\u308f\u308a\u307e\u3059\u3002\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3067\u306f<strong>\u30b5\u30fc\u30d0\u30fc\u8a3c\u660e\u66f8\u3068\u4e2d\u9593\u8a3c\u660e\u66f8\u3092\u9023\u7d50\u3057\u305f\u30d5\u30a1\u30a4\u30eb\uff08fullchain\uff09<\/strong>\u3092\u6307\u5b9a\u3059\u308b\u306e\u304c\u78ba\u5b9f\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u81ea\u5df1\u7f72\u540d\u8a3c\u660e\u66f8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u81ea\u5206\u3067\u767a\u884c\u3057\u305f\u8a3c\u660e\u66f8\u306f\u3001\u4fe1\u983c\u3055\u308c\u305f\u30eb\u30fc\u30c8\u307e\u3067\u8fbf\u308c\u306a\u3044\u305f\u3081\u5fc5\u305a\u8b66\u544a\u304c\u51fa\u307e\u3059\u3002\u958b\u767a\u74b0\u5883\u3067\u306f\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u672c\u756a\u3067\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9f\u969b\u306b\u78ba\u8a8d\u3059\u308b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.theipv6portal.org\/sslcheck\" target=\"_blank\" rel=\"noopener\">SSL\u8a3c\u660e\u66f8\u30c1\u30a7\u30c3\u30ab\u30fc<\/a>\u306b\u30db\u30b9\u30c8\u540d\u3092\u5165\u529b\u3059\u308b\u3068\u3001<strong>\u767a\u884c\u8005\u30fb\u6709\u52b9\u671f\u9650\u30fb\u6b8b\u308a\u65e5\u6570\u30fb\u5bfe\u8c61\u30c9\u30e1\u30a4\u30f3\uff08CN \/ SAN\uff09<\/strong>\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u6b8b\u308a\u65e5\u6570\u304c14\u65e5\u3092\u5207\u308b\u3068\u8d64\u304f\u8868\u793a\u3055\u308c\u308b\u306e\u3067\u3001\u66f4\u65b0\u6f0f\u308c\u306e\u65e9\u671f\u767a\u898b\u306b\u4f7f\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u8a3c\u660e\u66f8\u306f\u6b63\u5e38\u306a\u306e\u306b\u30b5\u30a4\u30c8\u304c\u8868\u793a\u3055\u308c\u306a\u3044\u300d\u3068\u3044\u3046\u5834\u5408\u306f\u3001\u8a3c\u660e\u66f8\u3067\u306f\u306a\u304f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5074\u306e\u554f\u984c\u3067\u3059\u3002<a href=\"https:\/\/www.theipv6portal.org\/column\/network-troubleshooting-order\/\">\u5207\u308a\u5206\u3051\u306e\u624b\u9806<\/a>\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8b66\u544a\u306e\u539f\u56e0\u306f\u6697\u53f7\u5316\u3067\u306f\u306a\u304f\u300c\u672c\u7269\u3067\u3042\u308b\u3053\u3068\u306e\u8a3c\u660e\u300d\u5074\u306b\u3042\u308b<\/li>\n<li>\u671f\u9650\u5207\u308c\u306f\u81ea\u52d5\u66f4\u65b0\u306e\u505c\u6b62\u304breload\u6f0f\u308c\u3002\u76e3\u8996\u3057\u3066\u304a\u3051\u3070\u9632\u3052\u308b<\/li>\n<li>www\u3042\u308a\uff0f\u306a\u3057\u3001\u591a\u6bb5\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306fSAN\u3068\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u306e\u7bc4\u56f2\u306b\u6ce8\u610f<\/li>\n<li>\u300c\u81ea\u5206\u306e\u74b0\u5883\u3060\u3051\u6b63\u5e38\u300d\u306a\u3089\u4e2d\u9593\u8a3c\u660e\u66f8\u306e\u8a2d\u5b9a\u6f0f\u308c\u3092\u7591\u3046<\/li>\n<\/ul>\n\n","protected":false},"excerpt":{"rendered":"<p>\u30d6\u30e9\u30a6\u30b6\u304c\u8b66\u544a\u3092\u51fa\u3059\u539f\u56e0\u306f\u6697\u53f7\u5316\u3067\u306f\u306a\u304f\u300c\u672c\u7269\u3067\u3042\u308b\u3053\u3068\u306e\u8a3c\u660e\u300d\u5074\u306b\u3042\u308a\u307e\u3059\u3002\u8a3c\u660e\u66f8\u30c1\u30a7\u30fc\u30f3\u306e\u4ed5\u7d44\u307f\u3068\u30014\u3064\u306e\u5178\u578b\u7684\u306a\u30a8\u30e9\u30fc\u539f\u56e0\u3092\u56f3\u89e3\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"author":0,"featured_media":24,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[6],"tags":[],"class_list":["post-30","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server-ssl"],"_links":{"self":[{"href":"https:\/\/www.theipv6portal.org\/column\/wp-json\/wp\/v2\/posts\/30","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.theipv6portal.org\/column\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.theipv6portal.org\/column\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/www.theipv6portal.org\/column\/wp-json\/wp\/v2\/comments?post=30"}],"version-history":[{"count":0,"href":"https:\/\/www.theipv6portal.org\/column\/wp-json\/wp\/v2\/posts\/30\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.theipv6portal.org\/column\/wp-json\/wp\/v2\/media\/24"}],"wp:attachment":[{"href":"https:\/\/www.theipv6portal.org\/column\/wp-json\/wp\/v2\/media?parent=30"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.theipv6portal.org\/column\/wp-json\/wp\/v2\/categories?post=30"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.theipv6portal.org\/column\/wp-json\/wp\/v2\/tags?post=30"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}