{"id":34761,"date":"2026-08-03T17:00:40","date_gmt":"2026-08-03T09:00:40","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/how-to-troubleshoot-dns-pollution-on-a-hk-server-domain\/"},"modified":"2026-08-03T17:08:47","modified_gmt":"2026-08-03T09:08:47","slug":"how-to-troubleshoot-dns-pollution-on-a-hk-server-domain","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/blog\/how-to-troubleshoot-dns-pollution-on-a-hk-server-domain\/","title":{"rendered":"\u5982\u4f55\u6392\u67e5\u9999\u6e2f\u670d\u52a1\u5668\u57df\u540d\u7684 DNS \u6c61\u67d3\u95ee\u9898"},"content":{"rendered":"<style>\n    table, th, td {\n        border: 1px solid black;\n        border-collapse: collapse;\n    }\n<\/style>\n<p>\u4f60\u53ef\u4ee5\u901a\u8fc7\u5c06\u672c\u5730\u89e3\u6790\u7ed3\u679c\u4e0e<a target=\"_blank\" href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/how-to-set-up-an-internal-dns-server\/\">DNS \u6c61\u67d3<\/a>\u7684\u68c0\u67e5\u7ed3\u5408\u8d77\u6765\uff0c\u5728\u4f60\u7684<a target=\"_blank\" href=\"https:\/\/www.varidata.com\/zh-cn\/server\/hk\/cn2\/\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\u4e0a\u5feb\u901f\u6392\u67e5\u9999\u6e2f\u57df\u540d\u7684 DNS \u6c61\u67d3\u95ee\u9898\u3002\u5c06\u672c\u5730\u89e3\u6790\u7ed3\u679c\u4e0e Cloudflare 1.1.1.1 \u7b49\u5e72\u51c0\u7684\u5916\u90e8\u89e3\u6790\u5668\u8fdb\u884c\u5bf9\u6bd4\u3002\u5728\u7ec8\u7aef\u4e2d\u8fd0\u884c dig domain.com @1.1.1.1\uff0c\u5e76\u901a\u8fc7\u5168\u7403\u89e3\u6790\u68c0\u6d4b\u5de5\u5177\u68c0\u67e5\u662f\u5426\u5b58\u5728\u4f2a\u9020 IP \u5730\u5740\uff0c\u4ece\u800c\u5feb\u901f\u8bc6\u522b\u5f02\u5e38\u3002<\/p>\n<blockquote>\n<p>\ud83d\udca1 <strong>\u5feb\u901f\u6062\u590d\u63d0\u793a<\/strong>\uff1a\u5982\u679c\u4f60\u7684\u672c\u5730\u7f51\u7edc\u8fd4\u56de\u4f2a\u9020\u5730\u5740\uff0c\u8bf7\u7acb\u5373\u6e05\u7406 DNS \u7f13\u5b58\uff0c\u5e76\u5c06\u670d\u52a1\u5668\u7684\u89e3\u6790\u7aef\u70b9\u5207\u6362\u5230\u5b89\u5168\u7684\u516c\u5171 DNS \u89e3\u6790\u5668\uff0c\u4ee5\u5c3d\u5feb\u6062\u590d\u8bbf\u95ee\u3002<\/p>\n<\/blockquote>\n<pre><code># \u5728 Linux \u4e0a\u6e05\u7406\u672c\u5730 DNS \u7f13\u5b58\r\nsudo systemd-resolve --flush-caches\r\n<\/code><\/pre>\n<h2>\u5173\u952e\u8981\u70b9<\/h2>\n<ul>\n<li>\n<p>\u5bf9\u6bd4\u672c\u5730\u57df\u540d\u67e5\u8be2\u7ed3\u679c\u4e0e Cloudflare \u8fd4\u56de\u7ed3\u679c\uff0c\u8bc6\u522b\u4f2a\u9020 IP \u5730\u5740\u3002<\/p>\n<\/li>\n<li>\n<p>\u6e05\u7406\u8bbe\u5907\u548c\u670d\u52a1\u5668\u7684 DNS \u7f13\u5b58\uff0c\u79fb\u9664\u4f2a\u9020 IP \u8bb0\u5f55\u3002<\/p>\n<\/li>\n<li>\n<p>\u5c06\u670d\u52a1\u5668\u914d\u7f6e\u5207\u6362\u4e3a\u4f7f\u7528 Cloudflare \u6216 Google \u7b49\u5b89\u5168\u516c\u5171 DNS \u89e3\u6790\u5668\u3002<\/p>\n<\/li>\n<li>\n<p>\u542f\u7528 DoH \u6216 DoT \u7b49\u52a0\u5bc6 DNS \u534f\u8bae\uff0c\u9632\u6b62\u9ed1\u5ba2\u7be1\u6539\u6d41\u91cf\u3002<\/p>\n<\/li>\n<li>\n<p>\u5f00\u542f DNSSEC \u52a0\u5bc6\u7b7e\u540d\uff0c\u9a8c\u8bc1\u57df\u540d\u5b89\u5168\u6027\u5e76\u62e6\u622a\u4f2a\u9020\u54cd\u5e94\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u5982\u4f55\u6392\u67e5\u9999\u6e2f\u57df\u540d\u7684 DNS \u6c61\u67d3<\/h2>\n<p>\u4f60\u53ef\u4ee5\u901a\u8fc7\u68c0\u67e5\u5173\u952e\u8bca\u65ad\u4fe1\u53f7\uff0c\u5feb\u901f\u6392\u67e5\u9999\u6e2f\u57df\u540d\u7684 DNS \u6c61\u67d3\u95ee\u9898\uff1a<\/p>\n<ul>\n<li>\n<p><strong>\u5730\u7406\u7ed3\u679c\u4e0d\u4e00\u81f4<\/strong>\uff1a\u4ece\u4e0d\u540c\u5730\u533a\u67e5\u8be2\u4f60\u7684\u57df\u540d\u65f6\uff0c\u8fd4\u56de\u5b8c\u5168\u65e0\u5173\u7684 IP \u5730\u5740\uff0c\u6216\u51fa\u73b0 <code>NXDOMAIN<\/code> \u9519\u8bef\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8de8\u5883\u89e3\u6790\u5931\u8d25<\/strong>\uff1a\u57df\u540d\u5728\u67d0\u4e00\u7f51\u7edc\u533a\u57df\u5185\u89e3\u6790\u6b63\u5e38\uff0c\u4f46\u5728\u6d77\u5916\u5730\u533a\u5b8c\u5168\u65e0\u6cd5\u89e3\u6790\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u89e3\u6790\u65f6\u597d\u65f6\u574f<\/strong>\uff1a\u8bbf\u95ee\u7ed3\u679c\u5728\u6210\u529f\u89e3\u6790\u4e0e\u8d85\u65f6\u5931\u8d25\u4e4b\u95f4\u6765\u56de\u5207\u6362\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u6743\u5a01 DNS \u4e0e\u672c\u5730 DNS \u4e0d\u4e00\u81f4<\/strong>\uff1a\u6743\u5a01 DNS \u670d\u52a1\u5668\u8fd4\u56de\u7684 IP \u5730\u5740\u6b63\u5e38\uff0c\u800c\u672c\u5730\u9012\u5f52 DNS \u89e3\u6790\u5668\u8fd4\u56de\u88ab\u7be1\u6539\u7684\u503c\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>\u901a\u8fc7\u5728\u7ebf\u5de5\u5177\u68c0\u6d4b\u5168\u7403\u89e3\u6790\u60c5\u51b5<\/h3>\n<p>\u4f60\u9700\u8981\u786e\u8ba4\u57df\u540d\u8bb0\u5f55\u662f\u5728\u5168\u7403\u8303\u56f4\u8fd8\u662f\u4ec5\u5728\u67d0\u4e9b\u533a\u57df\u8fd4\u56de\u9519\u8bef IP\u3002\u8bf8\u5982 Whatsmydns.net \u548c DNSChecker \u7b49\u5728\u7ebf\u5de5\u5177\uff0c\u53ef\u4ee5\u8ba9\u4f60\u540c\u65f6\u4ece\u51e0\u5341\u4e2a\u5168\u7403\u8282\u70b9\u5bf9\u57df\u540d\u8fdb\u884c\u68c0\u6d4b\u3002\u5728\u8fd9\u4e9b\u5e73\u53f0\u4e2d\u8f93\u5165\u4f60\u7684\u9999\u6e2f\u57df\u540d\uff0c\u5e76\u9009\u62e9 A \u8bb0\u5f55\u67e5\u8be2\u7c7b\u578b\u3002<\/p>\n<p>\u5bf9\u6bd4\u5404\u4e2a\u5730\u7406\u8282\u70b9\u8fd4\u56de\u7684 IP \u5730\u5740\u3002\u5065\u5eb7\u7684\u914d\u7f6e\u5e94\u5728\u6240\u6709\u4f4d\u7f6e\u90fd\u8fd4\u56de\u4f60\u7684\u771f\u5b9e\u670d\u52a1\u5668 IP\uff1b\u800c\u88ab\u6c61\u67d3\u65f6\uff0c\u5219\u4f1a\u5728\u67d0\u4e9b\u5730\u533a\u663e\u793a\u968f\u673a\u3001\u4e0d\u53ef\u8fbe\u6216\u865a\u5047\u7684 IP \u5730\u5740\u3002<\/p>\n<h3>\u4f7f\u7528 Dig \u548c Nslookup \u5b9a\u4f4d\u4f2a\u9020 IP<\/h3>\n<p><code>dig<\/code> \u548c <code>nslookup<\/code> \u7b49\u547d\u4ee4\u884c\u5de5\u5177\u53ef\u4ee5\u901a\u8fc7\u4e00\u7cfb\u5217\u8bca\u65ad\u6b65\u9aa4\u8f85\u52a9\u8bc6\u522b\u88ab\u4f2a\u9020\u7684 IP \u5730\u5740\uff1a<\/p>\n<ul>\n<li>\n<p><strong>IP \u68c0\u67e5<\/strong>\uff1a\u67e5\u8be2\u57df\u540d\uff0c\u68c0\u67e5\u8fd4\u56de\u7684 IP \u5730\u5740\uff0c\u6807\u8bb0\u4efb\u4f55\u5f02\u5e38\u6216\u610f\u5916\u7684\u76ee\u6807 IP\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8de8\u89e3\u6790\u5668\u5bf9\u6bd4<\/strong>\uff1a\u5bf9 Google <code>8.8.8.8<\/code> \u7b49\u53ef\u4fe1\u516c\u5171\u89e3\u6790\u5668\u53d1\u8d77\u67e5\u8be2\uff0c\u5e76\u5c06\u8fd4\u56de\u7ed3\u679c\u4e0e\u672c\u5730\u89e3\u6790\u7ed3\u679c\u8fdb\u884c\u5bf9\u6bd4\uff0c\u627e\u51fa\u4e0d\u4e00\u81f4\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u591a\u670d\u52a1\u5668\u6bd4\u5bf9<\/strong>\uff1a\u5411\u591a\u53f0\u4e0d\u540c\u7684 DNS \u670d\u52a1\u5668\u8bf7\u6c42\u8bb0\u5f55\uff0c\u8bc6\u522b\u88ab\u7be1\u6539\u7684\u54cd\u5e94\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u4ece\u4f60\u7684\u9999\u6e2f\u7f51\u7edc\u8282\u70b9\u4e0a\u6267\u884c\u5982\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code># \u901a\u8fc7\u672c\u5730\u9ed8\u8ba4\u89e3\u6790\u5668\u67e5\u8be2\r\ndig example.com +short\r\n\r\n# \u901a\u8fc7 Google Public DNS \u76f4\u63a5\u67e5\u8be2\r\ndig example.com @8.8.8.8 +short\r\n<\/code><\/pre>\n<p>\u5982\u679c\u672c\u5730\u8f93\u51fa\u4e0e\u516c\u5171\u89e3\u6790\u5668\u8fd4\u56de\u7684 IP \u5730\u5740\u4e0d\u540c\uff0c\u5c31\u53ef\u4ee5\u786e\u8ba4\u5b58\u5728 DNS \u6b3a\u9a97\u6216\u6c61\u67d3\u3002<\/p>\n<h3>\u4f7f\u7528 Dig Trace \u8ffd\u8e2a\u6743\u5a01\u89e3\u6790\u8def\u5f84<\/h3>\n<p>\u4f60\u53ef\u4ee5\u8ffd\u8e2a\u5b8c\u6574\u7684\u89e3\u6790\u94fe\u8def\uff0c\u4ee5\u5b9a\u4f4d\u53d1\u751f\u7be1\u6539\u7684\u5177\u4f53\u4f4d\u7f6e\u3002\u5bf9\u4f60\u7684\u6743\u5a01\u57df\u540d\u670d\u52a1\u5668\u6267\u884c\u9012\u5f52\u8def\u5f84\u8ffd\u8e2a\uff1a<\/p>\n<pre><code>dig example.com +trace\r\n<\/code><\/pre>\n<p>\u68c0\u67e5\u4ece\u6839\u670d\u52a1\u5668\u5230\u4f60\u57df\u540d\u6743\u5a01\u670d\u52a1\u5668\u7684\u6bcf\u4e00\u8df3\u3002\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u8ffd\u8e2a\u4f1a\u5728\u4f60\u7684\u6743\u5a01\u670d\u52a1\u5668\u5904\u8fd4\u56de\u6700\u7ec8\u7b54\u6848\u3002\u82e5\u94fe\u8def\u4e2d\u51fa\u73b0\u7be1\u6539\uff0c\u4f2a\u9020\u7684\u7ed3\u679c\u4f1a\u5728\u5230\u8fbe\u771f\u6b63\u7684\u6743\u5a01\u670d\u52a1\u5668\u4e4b\u524d\u88ab\u6ce8\u5165\u3002\u901a\u8fc7\u8bc6\u522b\u8fd9\u4e00\u6b65\u7684\u62e6\u622a\u4f4d\u7f6e\uff0c\u4f60\u5c31\u53ef\u4ee5\u6709\u6548\u6392\u67e5 DNS \u6c61\u67d3\u95ee\u9898\u3002\u7cfb\u7edf\u5316\u5730\u4f7f\u7528\u8fd9\u4e9b\u547d\u4ee4\uff0c\u53ef\u4ee5\u5728\u95ee\u9898\u5f71\u54cd\u7ec8\u7aef\u7528\u6237\u4e4b\u524d\u5b8c\u6210\u6392\u67e5\u4e0e\u5904\u7406\u3002<\/p>\n<h2>\u6e05\u7406\u88ab\u6c61\u67d3\u7684 DNS \u7f13\u5b58<\/h2>\n<p>\u4e00\u65e6\u9519\u8bef\u6570\u636e\u8fdb\u5165\u7f51\u7edc\uff0c\u53d7\u6c61\u67d3\u7684\u8bb0\u5f55\u4f1a\u88ab\u7f13\u5b58\u5728\u7cfb\u7edf\u5185\u5b58\u4e2d\u3002\u4f60\u5fc5\u987b\u5728\u5ba2\u6237\u7aef\u3001\u670d\u52a1\u5668\u5b9e\u4f8b\u4ee5\u53ca\u4e0a\u6e38\u89e3\u6790\u5668\u5c42\u9762\u6e05\u7406\u8fd9\u4e9b\u9648\u65e7\u8bb0\u5f55\uff0c\u624d\u80fd\u6062\u590d\u6b63\u5e38\u8def\u7531\u3002<\/p>\n<h3>\u6e05\u7406\u672c\u5730\u64cd\u4f5c\u7cfb\u7edf\u548c\u6d4f\u89c8\u5668\u7f13\u5b58<\/h3>\n<p>\u672c\u5730\u8bbe\u5907\u4f1a\u7f13\u5b58 DNS \u54cd\u5e94\uff0c\u4ee5\u52a0\u901f\u540e\u7eed\u8fde\u63a5\u3002\u5982\u679c\u672c\u5730\u7f13\u5b58\u4e2d\u5b58\u5728\u88ab\u6c61\u67d3\u7684\u8bb0\u5f55\uff0c\u6d41\u91cf\u4f1a\u88ab\u6301\u7eed\u5bfc\u5411\u9519\u8bef IP\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u4e0d\u540c\u64cd\u4f5c\u7cfb\u7edf\u548c\u6d4f\u89c8\u5668\u7684\u7279\u5b9a\u64cd\u4f5c\u6e05\u7406\u5ba2\u6237\u7aef\u7f13\u5b58\uff1a<\/p>\n<div fullwidth=\"\" class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 75px;\">\n<colgroup>\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u5e73\u53f0 \/ \u8f6f\u4ef6<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u64cd\u4f5c\u6b65\u9aa4<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u547d\u4ee4 \/ \u64cd\u4f5c<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>Windows<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5728\u547d\u4ee4\u63d0\u793a\u7b26\u4e2d\u8fd0\u884c\u547d\u4ee4<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p><code>ipconfig \/flushdns<\/code><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>macOS<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5728\u7ec8\u7aef\u4e2d\u8fd0\u884c\u547d\u4ee4<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p><code>sudo dscacheutil -flushcache;sudo killall -HUP mDNSResponder<\/code><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>Google Chrome<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6253\u5f00\u5185\u90e8\u8bbe\u7f6e\u9875\u9762<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8fdb\u5165 <code>chrome:\/\/net-internals\/#dns<\/code>\uff0c\u70b9\u51fb <strong>Clear host cache<\/strong><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>\u6e05\u7406\u9999\u6e2f\u670d\u52a1\u5668\u4e0a\u7684 DNS \u7f13\u5b58<\/h3>\n<p>\u8fd0\u884c\u672c\u5730\u9012\u5f52\u89e3\u6790\u5668\u6216\u7f13\u5b58\u5b88\u62a4\u8fdb\u7a0b\u7684\u9999\u6e2f\u670d\u52a1\u5668\uff0c\u540c\u6837\u4f1a\u4fdd\u5b58\u65e0\u6548\u54cd\u5e94\u3002\u4f60\u9700\u8981\u901a\u8fc7\u7ba1\u7406\u547d\u4ee4\u91cd\u542f\u8fd9\u4e9b\u670d\u52a1\u5668\u7ea7\u7684\u89e3\u6790\u670d\u52a1\u3002<\/p>\n<blockquote>\n<p>\ud83d\udca1 <strong>\u4e13\u4e1a\u63d0\u793a<\/strong>\uff1a\u6bcf\u6b21\u66f4\u65b0\u7f51\u7edc\u914d\u7f6e\u540e\uff0c\u8bf7\u52a1\u5fc5\u7acb\u5373\u91cd\u542f\u672c\u5730\u89e3\u6790\u670d\u52a1\uff0c\u4ee5\u5f7b\u5e95\u6e05\u9664\u65e7\u7f13\u5b58\u8bb0\u5f55\u3002<\/p>\n<\/blockquote>\n<div fullwidth=\"\" class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 75px;\">\n<colgroup>\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u64cd\u4f5c\u7cfb\u7edf \/ \u670d\u52a1<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u7ba1\u7406\u547d\u4ee4<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u76ee\u6807\u4f5c\u7528<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>Ubuntu Linux<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p><code>sudo resolvectl flush-caches<\/code><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6e05\u7406 systemd-resolved \u7f13\u5b58<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>AlmaLinux \/ CloudLinux<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p><code>sudo systemctl restart nscd<\/code><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u91cd\u542f NSCD \u5b88\u62a4\u8fdb\u7a0b<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>DNSMASQ \u670d\u52a1<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p><code>sudo systemctl restart dnsmasq<\/code><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6e05\u7406\u672c\u5730\u8f6c\u53d1\u7f13\u5b58<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>\u5411\u516c\u5171\u89e3\u6790\u670d\u52a1\u63d0\u4ea4\u7f13\u5b58\u6e05\u7406\u8bf7\u6c42<\/h3>\n<p>\u516c\u5171\u9012\u5f52 DNS \u63d0\u4f9b\u5546\u4f1a\u5728\u8bb0\u5f55 TTL \u5230\u671f\u524d\u4e00\u76f4\u4fdd\u7559\u6570\u636e\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u5f3a\u5236\u8fd9\u4e9b\u5168\u7403\u89e3\u6790\u5668\u76f4\u63a5\u4ece\u6743\u5a01\u670d\u52a1\u5668\u62c9\u53d6\u65b0\u8bb0\u5f55\uff0c\u6765\u66f4\u6709\u6548\u5730\u6392\u67e5 DNS \u6c61\u67d3\u3002<\/p>\n<p>\u5bf9\u4e8e Cloudflare (1.1.1.1)\uff0c\u53ef\u4ee5\u901a\u8fc7 Cloudflare \u7684\u5728\u7ebf\u7f13\u5b58\u6e05\u7406\u5de5\u5177\u63d0\u4ea4\u4f60\u7684\u57df\u540d\u3002\u8be5\u5de5\u5177\u4f1a\u5f3a\u5236 Cloudflare \u5404\u8282\u70b9\u6e05\u7a7a\u65e7\u8bb0\u5f55\uff0c\u5e76\u7acb\u5373\u5411\u6743\u5a01\u670d\u52a1\u5668\u8bf7\u6c42\u5e72\u51c0\u6570\u636e\u3002<\/p>\n<h2>\u5b9e\u65bd\u4e3b\u52a8\u4fee\u590d\u65b9\u6848<\/h2>\n<p>\u901a\u8fc7\u4e3b\u52a8\u7ed5\u8fc7\u88ab\u7be1\u6539\u7684\u7f51\u7edc\u8def\u5f84\uff0c\u4f60\u53ef\u4ee5\u6062\u590d\u57df\u540d\u89e3\u6790\u7684\u53ef\u9760\u6027\u3002\u90e8\u7f72\u5b89\u5168\u516c\u5171 DNS \u89e3\u6790\u5668\u4e0e\u73b0\u4ee3\u52a0\u5bc6\u534f\u8bae\uff0c\u53ef\u4ee5\u6709\u6548\u4fdd\u62a4\u57df\u540d\u6d41\u91cf\u514d\u53d7\u672c\u5730\u5e72\u6270\u3002<\/p>\n<h3>\u5207\u6362\u5230\u5176\u4ed6\u516c\u5171 DNS \u670d\u52a1<\/h3>\n<p>\u672c\u5730\u4e92\u8054\u7f51\u670d\u52a1\u63d0\u4f9b\u5546\uff08ISP\uff09\u5f80\u5f80\u4f9d\u8d56\u5b58\u5728\u98ce\u9669\u7684\u9012\u5f52\u89e3\u6790\u5668\u3002\u901a\u8fc7\u5c06\u57df\u540d\u67e5\u8be2\u6307\u5411\u53ef\u4fe1\u7684\u5168\u7403\u516c\u5171 DNS \u63d0\u4f9b\u5546\uff0c\u4f60\u53ef\u4ee5\u7acb\u5373\u7ed5\u5f00\u53d7\u6c61\u67d3\u7684\u672c\u5730\u7f51\u7edc\u3002Cloudflare\uff08<code>1.1.1.1<\/code>\uff09\u3001Google Public DNS\uff08<code>8.8.8.8<\/code>\uff09\u7b49\u670d\u52a1\uff0c\u4f1a\u5728\u5168\u7403\u5e72\u51c0\u8282\u70b9\u4e0a\u5904\u7406\u8bf7\u6c42\u3002<\/p>\n<p>\u5728\u7f51\u7edc\u9002\u914d\u5668\u8bbe\u7f6e\u4e2d\u5c06 DNS \u66f4\u6539\u4e3a\u4e0a\u8ff0 IP \u5730\u5740\uff0c\u53ef\u4ee5\u5b8c\u5168\u7ed5\u8fc7\u672c\u5730 ISP \u7684\u62e6\u622a\u70b9\u3002\u4f60\u7684\u670d\u52a1\u5668\u4f1a\u76f4\u63a5\u5411\u5b89\u5168\u7684\u5916\u90e8\u9012\u5f52\u89e3\u6790\u5668\u53d1\u8d77\u8bf7\u6c42\uff0c\u786e\u4fdd\u7528\u6237\u83b7\u5f97\u771f\u5b9e\u7684 IP \u54cd\u5e94\u3002<\/p>\n<h3>\u90e8\u7f72\u52a0\u5bc6\u534f\u8bae DoH \u548c DoT<\/h3>\n<p>\u4f20\u7edf UDP DNS \u67e5\u8be2\u901a\u5e38\u4ee5\u660e\u6587\u5f62\u5f0f\u901a\u8fc7 53 \u7aef\u53e3\u4f20\u8f93\u3002\u4e2d\u95f4\u8bbe\u5907\u53ef\u4ee5\u8f7b\u677e\u68c0\u67e5\u5e76\u7be1\u6539\u8de8\u5883\u4f20\u8f93\u7684\u660e\u6587\u6d41\u91cf\u3002<\/p>\n<p>\u8fd0\u884c\u5728\u660e\u6587\u901a\u9053\uff08\u5982\u4f20\u7edf 53 \u7aef\u53e3\uff09\u4e0a\u7684\u672a\u52a0\u5bc6 DNS \u4ea4\u4e92\uff0c\u6781\u6613\u906d\u5230\u4e2d\u95f4\u4eba\u653b\u51fb\u7be1\u6539\u3002\u4e3a\u4e86\u964d\u4f4e\u8fd9\u4e00\u98ce\u9669\uff0c\u5b89\u5168\u534f\u8bae\u8981\u6c42\u820d\u5f03\u901a\u8fc7\u660e\u6587\u4f20\u8f93\u7684\u670d\u52a1\u5668\u80fd\u529b\u4fe1\u606f\u3002<\/p>\n<p>\u90e8\u7f72\u52a0\u5bc6 DNS \u534f\u8bae\uff0c\u53ef\u4ee5\u4fdd\u62a4\u4f60\u7684\u670d\u52a1\u5668\u7aef\u70b9\u514d\u53d7\u4e3b\u52a8\u4f2a\u9020\u653b\u51fb\uff1a<\/p>\n<div fullwidth=\"\" class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 100px;\">\n<colgroup>\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u534f\u8bae<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u4f20\u8f93\u65b9\u5f0f<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u7aef\u53e3<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u9632\u7be1\u6539\u673a\u5236<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>DNS-over-TLS (DoT)<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5c01\u88c5\u5728 TLS \u6d41\u4e2d\u4f20\u8f93<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>TCP 853<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5728\u5ba2\u6237\u7aef\u4e0e\u89e3\u6790\u5668\u4e4b\u95f4\u52a0\u5bc6\u901a\u4fe1\u8def\u5f84\uff0c\u963b\u6b62\u7a83\u542c\u4e0e\u4e3b\u52a8\u7be1\u6539\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>DNS-over-HTTPS (DoH)<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u901a\u8fc7 HTTPS\uff08HTTP\/2 \u6216 HTTP\/3\uff09\u627f\u8f7d<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>TCP 443<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5c06 DNS \u62a5\u6587\u5c01\u88c5\u5728\u53d7 TLS \u52a0\u5bc6\u4fdd\u62a4\u7684 HTTP \u8bf7\u6c42\u4f53\u4e2d\uff0c\u4e0e\u666e\u901a Web \u6d41\u91cf\u6df7\u5408\uff0c\u4ece\u800c\u7ed5\u8fc7\u5e76\u9632\u6b62\u62e6\u622a\u4e0e\u7be1\u6539\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>\u91cd\u65b0\u914d\u7f6e\u4e0a\u6e38\u670d\u52a1\u5668\u89e3\u6790\u5668<\/h3>\n<p>\u4f60\u9700\u8981\u5728\u670d\u52a1\u5668\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u5f3a\u5236\u4f7f\u7528\u52a0\u5bc6\u7684\u4e0a\u6e38\u8fde\u63a5\u3002\u901a\u8fc7\u5c06\u4f20\u7edf\u4e0a\u6e38 DNS \u670d\u52a1\u5668\u5730\u5740\u66ff\u6362\u4e3a\u5b89\u5168\u7aef\u70b9\uff08\u5982 <code>https:\/\/dns.cloudflare.com\/dns-query<\/code> \u6216 <code>https:\/\/dns.google\/dns-query<\/code>\uff09\uff0c\u5373\u53ef\u4fdd\u62a4 DNS \u8bf7\u6c42\u7684\u5b89\u5168\u6027\u3002\u8bf7\u8bb0\u5f97\u914d\u7f6e\u57fa\u4e8e IP \u7684\u5f15\u5bfc DNS \u670d\u52a1\u5668\uff08\u4f8b\u5982 <code>1.1.1.1<\/code>\uff09\uff0c\u4ee5\u4fbf\u5728\u9996\u6b21\u89e3\u6790\u8fd9\u4e9b\u5b89\u5168\u7aef\u70b9\u7684\u57df\u540d\u65f6\u4f7f\u7528\u3002<\/p>\n<p>\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u7ba1\u7406\u65b9\u5f0f\uff0c\u4e3a\u4f60\u7684\u7aef\u70b9\u5f3a\u5236\u542f\u7528\u4e25\u683c\u7684\u52a0\u5bc6\uff1a<\/p>\n<div fullwidth=\"\" class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 75px;\">\n<colgroup>\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u914d\u7f6e\u65b9\u5f0f<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u8bbe\u7f6e \/ \u547d\u4ee4<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u8fd0\u884c\u8981\u6c42<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>DoH \u89e3\u6790\u534f\u8bae<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4ec5\u5141\u8bb8\u52a0\u5bc6\uff08DNS over HTTPS\uff09<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5f3a\u5236\u6240\u6709 DNS \u6d41\u91cf\u901a\u8fc7 HTTPS\uff1b\u82e5\u4e0a\u6e38\u4e0d\u652f\u6301 DoH\uff0c\u5219\u89e3\u6790\u5931\u8d25\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>\u7ec4\u7b56\u7565<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u914d\u7f6e DNS over HTTPS (DoH) \u540d\u79f0\u89e3\u6790 -&gt; \u8bbe\u4e3a\u201cRequire DoH\u201d<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5728\u8def\u5f84 <code>Computer Configuration\\Policies\\Administrative Templates\\Network\\DNS Client<\/code> \u4e2d\u5f3a\u5236\u542f\u7528 DoH\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>PowerShell Cmdlet<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p><code>Add-DnsClientDohServerAddress -ServerAddress '1.1.1.1' -DohTemplate 'https:\/\/cloudflare-dns.com\/dns-query' -AllowFallbackToUdp $False -AutoUpgrade $True<\/code><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6ce8\u518c\u65b0\u7684\u52a0\u5bc6\u7aef\u70b9\uff0c\u5e76\u660e\u786e\u7981\u6b62\u56de\u9000\u5230\u672a\u52a0\u5bc6\u7684 UDP \u67e5\u8be2\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>\u4f7f\u7528\u9ad8\u7ea7\u534f\u8bae\u52a0\u5f3a\u57df\u540d\u5b89\u5168<\/h2>\n<p>\u4f60\u53ef\u4ee5\u901a\u8fc7\u90e8\u7f72\u9ad8\u7ea7\u52a0\u5bc6\u534f\u8bae\u548c\u4f18\u5316\u914d\u7f6e\uff0c\u4fdd\u62a4\u9999\u6e2f\u57df\u540d\u514d\u53d7\u6301\u7eed\u7be1\u6539\u653b\u51fb\u3002\u8fd9\u4e9b\u524d\u77bb\u6027\u7b56\u7565\u53ef\u4ee5\u5f3a\u5316\u57fa\u7840\u8bbe\u65bd\uff0c\u9632\u6b62\u672a\u7ecf\u6388\u6743\u7684\u4fee\u6539\u3002<\/p>\n<h3>\u542f\u7528 DNSSEC \u52a0\u5bc6\u7b7e\u540d<\/h3>\n<p>DNSSEC\uff08Domain Name System Security Extensions\uff09\u4e3a DNS \u8bb0\u5f55\u589e\u52a0\u4e86\u52a0\u5bc6\u9a8c\u8bc1\u5c42\u3002\u901a\u8fc7\u9a8c\u8bc1\u57df\u540d\u6570\u636e\u7684\u6765\u6e90\uff0c\u4f60\u53ef\u4ee5\u4ece\u6839\u672c\u4e0a\u6d88\u9664\u7f13\u5b58\u6295\u6bd2\u98ce\u9669\u3002<\/p>\n<p>DNSSEC \u901a\u8fc7\u4ee5\u4e0b\u7ed3\u6784\u5316\u9a8c\u8bc1\u6d41\u7a0b\u4fdd\u62a4\u4f60\u7684 DNS \u89e3\u6790\u8def\u5f84\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u975e\u5bf9\u79f0\u5bc6\u94a5\u5206\u914d<\/strong>\uff1a\u5728\u6743\u5a01 DNS \u670d\u52a1\u5668\u4e0a\u751f\u6210\u516c\u94a5\/\u79c1\u94a5\u5bf9\u3002\u59a5\u5584\u4fdd\u7ba1\u79c1\u94a5\uff0c\u5e76\u5c06\u516c\u94a5\u4ee5\u8bb0\u5f55\u5f62\u5f0f\u53d1\u5e03\u5230 DNS \u533a\u57df\u4e2d\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u6570\u5b57\u7b7e\u540d<\/strong>\uff1a\u6743\u5a01\u670d\u52a1\u5668\u4f7f\u7528\u79c1\u94a5\u5bf9\u6bcf\u4e00\u7ec4 DNS \u8d44\u6e90\u8bb0\u5f55\u96c6\u8fdb\u884c\u7b7e\u540d\uff0c\u751f\u6210\u6570\u5b57\u7b7e\u540d\uff08RRSIG 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\u503c\u4ee5\u52a0\u901f\u6062\u590d<\/h3>\n<p>TTL\uff08Time-To-Live\uff09\u51b3\u5b9a\u4e86\u89e3\u6790\u5668\u5728\u672c\u5730\u7f13\u5b58 DNS \u8bb0\u5f55\u7684\u65f6\u95f4\u957f\u5ea6\u3002\u8bbe\u7f6e TTL \u65f6\uff0c\u9700\u8981\u5728\u7f51\u7edc\u6027\u80fd\u4e0e\u6545\u969c\u5feb\u901f\u6062\u590d\u80fd\u529b\u4e4b\u95f4\u627e\u5230\u5e73\u8861\u3002<\/p>\n<blockquote>\n<p>\ud83d\udca1 <strong>\u8fd0\u7ef4\u5efa\u8bae<\/strong>\uff1a\u5728\u8fdb\u884c\u7f51\u7edc\u53d8\u66f4\u4e4b\u524d\uff0c\u5c06 A \u8bb0\u5f55 TTL \u4e34\u65f6\u964d\u4f4e\u5230 300 \u79d2\uff085 \u5206\u949f\uff09\u3002\u8f83\u77ed\u7684 TTL \u53ef\u4ee5\u5e2e\u52a9\u5404\u89e3\u6790\u5668\u66f4\u5feb\u5730\u540c\u6b65\u5230\u65b0\u7684\u6709\u6548\u8bb0\u5f55\u3002<\/p>\n<\/blockquote>\n<p>TTL \u8bbe\u7f6e\u8fc7\u9ad8\u4f1a\u5bfc\u81f4\u7f13\u5b58\u4e2d\u7684\u9519\u8bef IP \u4fdd\u6301\u6570\u5929\u4e0d\u53d8\uff1b\u800c\u5728\u65e5\u5e38\u8fd0\u7ef4\u4e2d\u4f7f\u7528\u9002\u4e2d\u7684 TTL \u503c\uff0c\u5219\u53ef\u4ee5\u5728\u4f60\u6392\u67e5\u8de8\u5883 DNS \u6c61\u67d3\u65f6\uff0c\u5b9e\u73b0\u66f4\u5feb\u7684\u6062\u590d\u901f\u5ea6\u3002<\/p>\n<h3>\u76d1\u63a7\u8de8\u5883\u89e3\u6790\u5b8c\u6574\u6027<\/h3>\n<p>\u4f60\u9700\u8981\u6301\u7eed\u76d1\u63a7\u57df\u540d\u5728\u5916\u90e8\u89c6\u89d2\u4e0b\u7684\u89e3\u6790\u5065\u5eb7\u72b6\u51b5\u3002\u81ea\u52a8\u5316\u76d1\u63a7\u7cfb\u7edf\u4f1a\u5b9a\u671f\u4ece\u591a\u4e2a\u5730\u533a\u5411\u4f60\u7684\u6743\u5a01\u670d\u52a1\u5668\u548c\u672c\u5730\u9012\u5f52\u89e3\u6790\u5668\u53d1\u9001\u67e5\u8be2\u8bf7\u6c42\u3002<\/p>\n<div fullwidth=\"\" class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 75px;\">\n<colgroup>\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u76d1\u63a7\u7ef4\u5ea6<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u64cd\u4f5c\u8981\u6c42<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u76ee\u6807\u6307\u6807<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>\u533a\u57df\u63a2\u6d4b\u8282\u70b9<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4ece\u4e2d\u56fd\u5185\u5730\u548c\u6d77\u5916\u8282\u70b9\u5b9a\u671f\u8fd0\u884c <code>dig<\/code> \u67e5\u8be2\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5373\u65f6\u6838\u5bf9 IP \u662f\u5426\u5b8c\u5168\u4e00\u81f4<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><strong>\u544a\u8b66\u89e6\u53d1<\/strong><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u914d\u7f6e\u5f02\u5e38 IP \u8fd4\u56de\u65f6\u7684\u5b9e\u65f6\u544a\u8b66\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5728 60 \u79d2\u5185\u5b8c\u6210\u544a\u8b66\u901a\u77e5<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div dividerstyle=\"solid\" size=\"large\" color=\"#D1D1D1\" class=\"qc-divider-wrapper\">\n<div class=\"qc-divider\" style=\"border-top-style: solid; width: 100%; border-top-color: rgb(209, 209, 209);\"><\/div>\n<\/div>\n<p>\u8981\u6210\u529f\u6392\u67e5 DNS \u6c61\u67d3\uff0c\u4f60\u9700\u8981\u4e00\u5957\u4e25\u8c28\u7684\u8fd0\u7ef4\u7b56\u7565\u3002\u53ef\u6309\u7167\u4ee5\u4e0b\u5feb\u901f\u6e05\u5355\u4fdd\u62a4\u4f60\u7684\u9999\u6e2f\u670d\u52a1\u5668\u57df\u540d\uff1a<\/p>\n<ul>\n<li>\n<p><strong>\u68c0\u6d4b<\/strong>\uff1a\u5bf9\u6bd4\u672c\u5730\u67e5\u8be2\u7ed3\u679c\u4e0e <code>1.1.1.1<\/code> \u7b49\u5e72\u51c0\u89e3\u6790\u5668\u7684\u7ed3\u679c\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u6e05\u7406<\/strong>\uff1a\u6e05\u7a7a\u64cd\u4f5c\u7cfb\u7edf\u3001\u6d4f\u89c8\u5668\u4e0e\u670d\u52a1\u5668\u5b9e\u4f8b\u4e0a\u7684 DNS \u7f13\u5b58\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u5207\u6362<\/strong>\uff1a\u90e8\u7f72 DNS-over-HTTPS \u6216 DNS-over-TLS \u7b49\u5b89\u5168 DNS \u534f\u8bae\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u52a0\u56fa<\/strong>\uff1a\u542f\u7528 DNSSEC 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\u7aef\u53e3\u7684\u54cd\u5e94\u4e2d\u3002\u4f60\u7684\u670d\u52a1\u5668\u968f\u540e\u4f1a\u5c06\u8fd9\u4e9b\u4f2a\u9020\u7ed3\u679c\u7f13\u5b58\u4e0b\u6765\uff0c\u5bfc\u81f4\u6b63\u5e38\u8bbf\u95ee\u88ab\u963b\u65ad\u3002<\/p>\n<h3>DNS \u6c61\u67d3\u95ee\u9898\u4e00\u822c\u591a\u4e45\u80fd\u4fee\u590d\uff1f<\/h3>\n<p>\u901a\u8fc7\u5c06\u672c\u5730\u89e3\u6790\u5668\u5207\u6362\u5230 DoH \u6216 DoT \u7b49\u52a0\u5bc6\u7aef\u70b9\uff0c\u53ef\u4ee5\u7acb\u5373\u7ed5\u8fc7\u53d7\u6c61\u67d3\u7684\u8def\u5f84\u3002\u4f46\u5168\u7403\u8303\u56f4\u7684\u7f13\u5b58\u6e05\u7406\u901f\u5ea6\u53d6\u51b3\u4e8e\u8bb0\u5f55\u7684 TTL\u3002\u5c06 TTL \u964d\u4f4e\u5230 300 \u79d2\uff0c\u53ef\u4ee5\u663e\u8457\u52a0\u5feb\u5916\u90e8\u7f51\u7edc\u7684\u6062\u590d\u901f\u5ea6\u3002<\/p>\n<p>| \u89e3\u51b3\u65b9\u6848 | \u90e8\u7f72\u65f6\u95f4 | \u6062\u590d\u901f\u5ea6 | | : | : | : | | \u6e05\u7406\u672c\u5730\u7f13\u5b58 | 1 \u5206\u949f | \u672c\u5730\u7acb\u5373\u751f\u6548 | | \u542f\u7528 DoH \/ DoT | 5 \u5206\u949f | \u670d\u52a1\u5668\u8def\u5f84\u5373\u65f6\u751f\u6548 | | \u964d\u4f4e\u8bb0\u5f55 TTL | 2 \u5206\u949f | 5 \u81f3 30 \u5206\u949f\uff08\u5168\u7403\u8303\u56f4\uff09 |<\/p>\n<h3>DNSSEC \u80fd\u5b8c\u5168\u963b\u6b62 DNS \u6b3a\u9a97\u5417\uff1f<\/h3>\n<p>DNSSEC \u65e0\u6cd5\u963b\u6b62\u653b\u51fb\u8005\u53d1\u9001\u4f2a\u9020\u54cd\u5e94\uff0c\u4f46\u5b83\u4f1a\u4e3a\u8bb0\u5f55\u6dfb\u52a0\u52a0\u5bc6\u7b7e\u540d\u3002\u9012\u5f52\u89e3\u6790\u5668\u4f1a\u9a8c\u8bc1\u8fd9\u4e9b\u7b7e\u540d\uff0c\u5e76\u81ea\u52a8\u4e22\u5f03\u4f2a\u9020\u8bb0\u5f55\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0cDNSSEC \u963b\u6b62\u4f60\u7684\u7cfb\u7edf\u5c06\u88ab\u6c61\u67d3\u7684 IP \u5730\u5740\u5199\u5165\u7f13\u5b58\u3002<\/p>\n<h3>\u4e3a\u4ec0\u4e48\u8981\u7528\u516c\u5171\u89e3\u6790\u5668\u6765\u6392\u67e5 DNS \u6c61\u67d3\uff1f<\/h3>\n<blockquote>\n<p>\ud83d\udca1 <strong>\u5173\u952e\u8981\u70b9<\/strong>\uff1a\u672c\u5730 ISP 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