Cách lấy chứng chỉ Let’s Encrypt bằng DNS trên Ubuntu 18.04
11/08/2025
Về tác giả
I have over 5 years of experience writing technical documentation for tech products, making them accessible and user-friendly. My focus is always on providing clear and precise information.
@#@
Tôi đã có hơn 5 năm kinh nghiệm viết tài liệu kỹ thuật cho các sản phẩm công nghệ, giúp người dùng dễ dàng tiếp cận và sử dụng. Tôi luôn tập trung vào việc cung cấp thông tin chính xác và dễ hiểu.
Cập nhật thông tin mới nhấtNhận các thông tin mới nhất về mối đe dọa, báo cáo an ninh mạng từ CyStack về hòm thư điện tử của bạn
{"success":true,"head":"<title>Cách lấy chứng chỉ Let's Encrypt bằng DNS trên Ubuntu 18.04 - CyStack Tutorial</title>\n<meta name=\"description\" content=\"Hướng dẫn chi tiết cách lấy chứng chỉ Let's Encrypt bằng DNS trên Ubuntu 18.04. Thiết lập SSL miễn phí, bảo mật website và cấu hình tự động gia hạn chứng chỉ nhanh chóng.\"/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-video-preview:-1, max-image-preview:large\"/>\n<link rel=\"canonical\" href=\"https://blog.cystack.org/tutorial/vi/2025/08/11/lay-chung-chi-lets-encrypt-bang-dns/\" />\n<meta property=\"og:locale\" content=\"en_US\" />\n<meta property=\"og:type\" content=\"article\" />\n<meta property=\"og:title\" content=\"Cách lấy chứng chỉ Let's Encrypt bằng DNS trên Ubuntu 18.04 - CyStack Tutorial\" />\n<meta property=\"og:description\" content=\"Hướng dẫn chi tiết cách lấy chứng chỉ Let's Encrypt bằng DNS trên Ubuntu 18.04. Thiết lập SSL miễn phí, bảo mật website và cấu hình tự động gia hạn chứng chỉ nhanh chóng.\" />\n<meta property=\"og:url\" content=\"https://blog.cystack.org/tutorial/vi/2025/08/11/lay-chung-chi-lets-encrypt-bang-dns/\" />\n<meta property=\"og:site_name\" content=\"CyStack Tutorial\" />\n<meta property=\"article:tag\" content=\"vi\" />\n<meta property=\"article:section\" content=\"Bảo mật\" />\n<meta property=\"og:updated_time\" content=\"2026-08-03T16:50:25+07:00\" />\n<meta property=\"og:image\" content=\"https://s2.cystack.net/tutorial/11211532/lay-chung-chi-lets-encrypt-bang-dns.jpg\" />\n<meta property=\"og:image:secure_url\" content=\"https://s2.cystack.net/tutorial/11211532/lay-chung-chi-lets-encrypt-bang-dns.jpg\" />\n<meta property=\"og:image:width\" content=\"1200\" />\n<meta property=\"og:image:height\" content=\"630\" />\n<meta property=\"og:image:alt\" content=\"lấy chứng chỉ Let's Encrypt bằng DNS\" />\n<meta property=\"og:image:type\" content=\"image/jpeg\" />\n<meta property=\"article:published_time\" content=\"2025-08-11T21:17:10+07:00\" />\n<meta property=\"article:modified_time\" content=\"2026-08-03T16:50:25+07:00\" />\n<meta name=\"twitter:card\" content=\"summary_large_image\" />\n<meta name=\"twitter:title\" content=\"Cách lấy chứng chỉ Let's Encrypt bằng DNS trên Ubuntu 18.04 - CyStack Tutorial\" />\n<meta name=\"twitter:description\" content=\"Hướng dẫn chi tiết cách lấy chứng chỉ Let's Encrypt bằng DNS trên Ubuntu 18.04. Thiết lập SSL miễn phí, bảo mật website và cấu hình tự động gia hạn chứng chỉ nhanh chóng.\" />\n<meta name=\"twitter:image\" content=\"https://s2.cystack.net/tutorial/11211532/lay-chung-chi-lets-encrypt-bang-dns.jpg\" />\n<meta name=\"twitter:label1\" content=\"Written by\" />\n<meta name=\"twitter:data1\" content=\"Chris Pham\" />\n<meta name=\"twitter:label2\" content=\"Time to read\" />\n<meta name=\"twitter:data2\" content=\"12 minutes\" />\n<script type=\"application/ld+json\" class=\"rank-math-schema\">{\"@context\":\"https://schema.org\",\"@graph\":[{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https://blog.cystack.org/tutorial/#person\",\"name\":\"CyStack Tutorial\"},{\"@type\":\"WebSite\",\"@id\":\"https://blog.cystack.org/tutorial/#website\",\"url\":\"https://blog.cystack.org/tutorial\",\"name\":\"CyStack Tutorial\",\"publisher\":{\"@id\":\"https://blog.cystack.org/tutorial/#person\"},\"inLanguage\":\"en-US\"},{\"@type\":\"ImageObject\",\"@id\":\"https://s2.cystack.net/tutorial/11211532/lay-chung-chi-lets-encrypt-bang-dns.jpg\",\"url\":\"https://s2.cystack.net/tutorial/11211532/lay-chung-chi-lets-encrypt-bang-dns.jpg\",\"width\":\"1200\",\"height\":\"630\",\"caption\":\"l\\u1ea5y ch\\u1ee9ng ch\\u1ec9 Let's Encrypt b\\u1eb1ng DNS\",\"inLanguage\":\"en-US\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https://blog.cystack.org/tutorial/vi/2025/08/11/lay-chung-chi-lets-encrypt-bang-dns/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":\"1\",\"item\":{\"@id\":\"https://blog.cystack.org/tutorial\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"position\":\"2\",\"item\":{\"@id\":\"https://blog.cystack.org/tutorial/vi/category/bao-mat/\",\"name\":\"B\\u1ea3o m\\u1eadt\"}},{\"@type\":\"ListItem\",\"position\":\"3\",\"item\":{\"@id\":\"https://blog.cystack.org/tutorial/vi/2025/08/11/lay-chung-chi-lets-encrypt-bang-dns/\",\"name\":\"C\\u00e1ch l\\u1ea5y ch\\u1ee9ng ch\\u1ec9 Let’s Encrypt b\\u1eb1ng DNS tr\\u00ean Ubuntu 18.04\"}}]},{\"@type\":\"WebPage\",\"@id\":\"https://blog.cystack.org/tutorial/vi/2025/08/11/lay-chung-chi-lets-encrypt-bang-dns/#webpage\",\"url\":\"https://blog.cystack.org/tutorial/vi/2025/08/11/lay-chung-chi-lets-encrypt-bang-dns/\",\"name\":\"C\\u00e1ch l\\u1ea5y ch\\u1ee9ng ch\\u1ec9 Let's Encrypt b\\u1eb1ng DNS tr\\u00ean Ubuntu 18.04 - CyStack Tutorial\",\"datePublished\":\"2025-08-11T21:17:10+07:00\",\"dateModified\":\"2026-08-03T16:50:25+07:00\",\"isPartOf\":{\"@id\":\"https://blog.cystack.org/tutorial/#website\"},\"primaryImageOfPage\":{\"@id\":\"https://s2.cystack.net/tutorial/11211532/lay-chung-chi-lets-encrypt-bang-dns.jpg\"},\"inLanguage\":\"en-US\",\"breadcrumb\":{\"@id\":\"https://blog.cystack.org/tutorial/vi/2025/08/11/lay-chung-chi-lets-encrypt-bang-dns/#breadcrumb\"}},{\"@type\":\"Person\",\"@id\":\"https://blog.cystack.org/tutorial/author/codeweaver/\",\"name\":\"Chris Pham\",\"url\":\"https://blog.cystack.org/tutorial/author/codeweaver/\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https://secure.gravatar.com/avatar/7a3584c941fa360ac061b2a8f15684ced7b92daa1f09481be135a684d989e9b9?s=96&d=mm&r=g\",\"url\":\"https://secure.gravatar.com/avatar/7a3584c941fa360ac061b2a8f15684ced7b92daa1f09481be135a684d989e9b9?s=96&d=mm&r=g\",\"caption\":\"Chris Pham\",\"inLanguage\":\"en-US\"}},{\"@type\":\"BlogPosting\",\"headline\":\"C\\u00e1ch l\\u1ea5y ch\\u1ee9ng ch\\u1ec9 Let's Encrypt b\\u1eb1ng DNS tr\\u00ean Ubuntu 18.04 - CyStack Tutorial\",\"keywords\":\"Let's Encrypt\",\"datePublished\":\"2025-08-11T21:17:10+07:00\",\"dateModified\":\"2026-08-03T16:50:25+07:00\",\"articleSection\":\"B\\u1ea3o m\\u1eadt, Chuy\\u00ean gia, M\\u1ea1ng m\\u00e1y t\\u00ednh\",\"author\":{\"@id\":\"https://blog.cystack.org/tutorial/author/codeweaver/\",\"name\":\"Chris Pham\"},\"publisher\":{\"@id\":\"https://blog.cystack.org/tutorial/#person\"},\"description\":\"H\\u01b0\\u1edbng d\\u1eabn chi ti\\u1ebft c\\u00e1ch l\\u1ea5y ch\\u1ee9ng ch\\u1ec9 Let's Encrypt b\\u1eb1ng DNS tr\\u00ean Ubuntu 18.04. Thi\\u1ebft l\\u1eadp SSL mi\\u1ec5n ph\\u00ed, b\\u1ea3o m\\u1eadt website v\\u00e0 c\\u1ea5u h\\u00ecnh t\\u1ef1 \\u0111\\u1ed9ng gia h\\u1ea1n ch\\u1ee9ng ch\\u1ec9 nhanh ch\\u00f3ng.\",\"name\":\"C\\u00e1ch l\\u1ea5y ch\\u1ee9ng ch\\u1ec9 Let's Encrypt b\\u1eb1ng DNS tr\\u00ean Ubuntu 18.04 - CyStack Tutorial\",\"@id\":\"https://blog.cystack.org/tutorial/vi/2025/08/11/lay-chung-chi-lets-encrypt-bang-dns/#richSnippet\",\"isPartOf\":{\"@id\":\"https://blog.cystack.org/tutorial/vi/2025/08/11/lay-chung-chi-lets-encrypt-bang-dns/#webpage\"},\"image\":{\"@id\":\"https://s2.cystack.net/tutorial/11211532/lay-chung-chi-lets-encrypt-bang-dns.jpg\"},\"inLanguage\":\"en-US\",\"mainEntityOfPage\":{\"@id\":\"https://blog.cystack.org/tutorial/vi/2025/08/11/lay-chung-chi-lets-encrypt-bang-dns/#webpage\"}}]}</script>\n"}
