{"id":86141,"date":"2026-07-28T06:56:27","date_gmt":"2026-07-27T22:56:27","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/86141.html"},"modified":"2026-07-28T06:56:27","modified_gmt":"2026-07-27T22:56:27","slug":"dns%e5%85%a5%e9%97%a8%e5%bf%85%e7%9f%a5%ef%bc%9a%e4%bb%8e%e6%a0%b9%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%88%b0%e8%ae%b0%e5%bd%95%e7%b1%bb%e5%9e%8b%ef%bc%8c%e4%b8%80%e5%bc%a0%e5%9b%be%e7%9c%8b%e6%87%82dns","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/86141.html","title":{"rendered":"DNS\u5165\u95e8\u5fc5\u77e5\uff1a\u4ece\u6839\u670d\u52a1\u5668\u5230\u8bb0\u5f55\u7c7b\u578b\uff0c\u4e00\u5f20\u56fe\u770b\u61c2DNS\u89e3\u6790\u5168\u8fc7\u7a0b"},"content":{"rendered":"

\u524d\u8a00<\/h3>\n

\u4f5c\u4e3a\u8fd0\u7ef4\u65b0\u4eba，DNS \u662f\u4f60\u6bcf\u5929\u90fd\u4f1a\u6253\u4ea4\u9053\u7684\u57fa\u7840\u8bbe\u65bd\u3002\u4f46\u4f60\u771f\u7684\u77e5\u9053\u5f53\u4f60\u8f93\u5165 www.baidu.com \u540e，\u80cc\u540e\u53d1\u751f\u4e86\u4ec0\u4e48\u5417？<\/p>\n

\u672c\u6587\u901a\u8fc7\u5b9e\u9645\u73af\u5883 demo.example-corp.com \u7684\u5b8c\u6574\u89e3\u6790\u8fc7\u7a0b，\u5e26\u4f60\u4e00\u6b21\u6027\u641e\u61c2 DNS \u7684\u57fa\u7840\u67b6\u6784\u3002<\/p>\n

\n

\u4e00\u3001DNS \u7684\u6838\u5fc3\u4f5c\u7528<\/h3>\n

\u4e00\u53e5\u8bdd\u5b9a\u4e49：DNS \u628a\u4eba\u7c7b\u6613\u8bb0\u7684\u57df\u540d\u7ffb\u8bd1\u6210\u673a\u5668\u53ef\u8bfb\u7684 IP \u5730\u5740\u3002<\/p>\n\n\u573a\u666f\u6ca1\u6709 DNS\u6709 DNS<\/tr>\n\n\n\n\n
\u8bbf\u95ee\u7f51\u7ad9<\/td>\n\u8bb0 IP：203.0.113.1<\/td>\n\u8bb0\u57df\u540d：www.example-corp.com<\/td>\n<\/tr>\n
\u6362\u670d\u52a1\u5668<\/td>\n\u901a\u77e5\u6240\u6709\u4eba\u6539 IP<\/td>\n\u6539\u4e00\u6761 DNS \u8bb0\u5f55<\/td>\n<\/tr>\n
CDN \u52a0\u901f<\/td>\n\u65e0\u6cd5\u5b9e\u73b0<\/td>\nCNAME \u5230 CDN \u81ea\u52a8\u8c03\u5ea6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

\u4e8c\u3001DNS \u6811\u72b6\u5206\u5c42\u7ed3\u6784<\/h3>\n

DNS \u662f\u6811\u5f62\u7ed3\u6784，\u4ece\u53f3\u5f80\u5de6\u770b：<\/p>\n

www.example-corp.com.
\n \u2502 \u00a0 \u2502 \u00a0 \u00a0 \u00a0 \u2502 \u00a0 \u2514\u2500\u2500 \u6839\u57df（root，\u9876\u7ea7\u57df\u540d\u6700\u540e\u7684\u70b9）
\n \u2502 \u00a0 \u2502 \u00a0 \u00a0 \u00a0 \u2514\u2500\u2500 \u9876\u7ea7\u57df（TLD，.com）
\n \u2502 \u00a0 \u2514\u2500\u2500 \u4e8c\u7ea7\u57df（eastmoney）
\n \u2514\u2500\u2500 \u5b50\u57df（www）<\/p>\n

\u6bcf\u4e00\u5c42\u7684\u804c\u8d23：<\/p>\n\n\u5c42\u7ea7\u804c\u8d23\u793a\u4f8b<\/tr>\n\n\n\n\n\n
\u6839\u57df<\/td>\n\u5b58\u50a8\u6240\u6709 TLD \u7684 NS \u8bb0\u5f55<\/td>\n.（\u4e00\u4e2a\u70b9）<\/td>\n<\/tr>\n
TLD<\/td>\n\u5b58\u50a8\u6240\u6709\u4e8c\u7ea7\u57df\u7684\u6743\u5a01 DNS \u5730\u5740<\/td>\n.com\u3001.cn<\/td>\n<\/tr>\n
\u4e8c\u7ea7\u57df<\/td>\n\u4f60\u6ce8\u518c\u7684\u57df\u540d<\/td>\nexample-corp.com<\/td>\n<\/tr>\n
\u5b50\u57df<\/td>\n\u4e8c\u7ea7\u57df\u4e0b\u7684\u7ec6\u5206<\/td>\nwww\u3001api\u3001img<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

\u4e09\u3001\u5b8c\u6574\u89e3\u6790\u6d41\u7a0b（\u9010\u5e27\u62c6\u89e3）<\/h3>\n

3.1 \u7f13\u5b58\u68c0\u67e5<\/h4>\n

hosts \u6587\u4ef6 \u2192 OS \u7f13\u5b58 \u2192 \u6d4f\u89c8\u5668\u7f13\u5b58 \u2192 \u672c\u5730\u9012\u5f52 DNS \u7f13\u5b58
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u2193 \u5168\u90e8\u672a\u547d\u4e2d
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u5f00\u59cb\u9012\u5f52\u67e5\u8be2<\/p>\n

3.2 \u9012\u5f52\u67e5\u8be2<\/h4>\n

\u4ee5\u4f60\u7684 demo.example-corp.com \u4e3a\u4f8b，\u5b9e\u9645\u7684\u67e5\u8be2\u8def\u5f84：<\/p>\n

\u2460 \u4f60\u7684\u6d4f\u89c8\u5668
\n \u00a0 \u2193
\n\u2461 \u5185\u7f51 DNS（10.126.251.11，\u7f13\u5b58\u672a\u547d\u4e2d）
\n \u00a0 \u2193
\n\u2462 \u6839\u670d\u52a1\u5668（l.root-servers.net，27ms \u54cd\u5e94）
\n \u00a0 "\u53bb\u95ee .com TLD"
\n \u00a0 \u2193
\n\u2463 .com TLD（b.gtld-servers.net，17ms \u54cd\u5e94）
\n \u00a0 "example-corp.com \u7684\u6743\u5a01 DNS \u662f ns1.clouddns.com"
\n \u00a0 \u2193
\n\u2464 \u4e91DNS\u6743\u5a01 DNS（ns1.clouddns.com，33ms \u54cd\u5e94）
\n \u00a0 "demo.example-corp.com \u2192 CNAME \u2192 \u661f\u4e91CDN"
\n \u00a0 \u2193
\n\u2465 \u6d4f\u89c8\u5668\u62ff\u5230\u7ed3\u679c，\u5f00\u59cb HTTP \u8bf7\u6c42<\/p>\n

3.3 \u7528 dig +trace \u5b9e\u6218\u9a8c\u8bc1<\/h4>\n

dig demo.example-corp.com +trace<\/p>\n

\u8f93\u51fa\u5206 4 \u6bb5，\u6bcf\u6bb5\u5bf9\u5e94\u4e0a\u56fe\u7684\u6bcf\u4e00\u6b65：<\/p>\n

\u7b2c 1 \u6bb5：\u6839\u670d\u52a1\u5668<\/p>\n

. 480164 IN NS a.root-servers.net. （\u5171 13 \u7ec4）
\n;; Received from 10.126.251.11 in 0 ms<\/p>\n

\u4f60\u7684\u5185\u7f51 DNS \u76f4\u63a5\u8fd4\u56de\u4e86\u7f13\u5b58\u7684\u6839\u670d\u52a1\u5668\u5217\u8868（0ms），\u8bf4\u660e\u6839 NS \u4fe1\u606f\u88ab\u957f\u671f\u7f13\u5b58\u3002<\/p>\n

\u7b2c 2 \u6bb5：.com TLD<\/p>\n

com. 172800 IN NS a.gtld-servers.net. （\u5171 13 \u7ec4）
\n;; Received from 199.7.83.42 (l.root-servers.net) in 27 ms<\/p>\n

\u5b9e\u9645\u8054\u7cfb\u4e86 l.root-servers.net（199.7.83.42），27ms \u8fd4\u56de\u4e86 .com TLD \u7684 NS \u5217\u8868\u3002<\/p>\n

\u7b2c 3 \u6bb5：example-corp.com \u6743\u5a01 DNS<\/p>\n

example-corp.com. 172800 IN NS ns1.clouddns.com.
\nexample-corp.com. 172800 IN NS ns2.clouddns.com.<\/p>\n

TLD \u544a\u8bc9\u9012\u5f52 DNS："example-corp.com \u7684\u6743\u5a01 DNS \u662f\u4e91DNS\u7684\u4e24\u53f0\u670d\u52a1\u5668"\u3002<\/p>\n

\u7b2c 4 \u6bb5：\u6700\u7ec8\u7b54\u6848<\/p>\n

demo.example-corp.com. 600 IN CNAME demo.example-corp.com.cdn-edge.cloudfront-cdn.com.<\/p>\n

\u4e91DNS \u8fd4\u56de\u4e86 CNAME \u8bb0\u5f55，\u6307\u5411\u661f\u4e91CDN\u3002<\/p>\n

\n

\u56db\u30016 \u79cd\u6838\u5fc3 DNS \u8bb0\u5f55\u7c7b\u578b<\/h3>\n

4.1 A \u8bb0\u5f55 \u2014\u2014 \u6700\u6838\u5fc3<\/h4>\n

\u57df\u540d \u2192 IPv4：<\/p>\n

dig demo.example-corp.com A +short
\n\u2192 CNAME \u94fe\u8ffd\u5230\u6700\u7ec8 IP：203.0.113.10, 203.0.113.11<\/p>\n

4.2 CNAME \u8bb0\u5f55 \u2014\u2014 CDN \u7684\u7075\u9b42<\/h4>\n

\u57df\u540d \u2192 \u53e6\u4e00\u4e2a\u57df\u540d（\u522b\u540d）：<\/p>\n

dig demo.example-corp.com CNAME +short
\n\u2192 demo.example-corp.com.cdn-edge.cloudfront-cdn.com
\n\u200b
\n# host \u547d\u4ee4\u770b CNAME \u94fe\u6700\u6e05\u6670
\nhost demo.example-corp.com
\n\u2192 demo.example-corp.com \u2192 cdn-edge.cloudfront-cdn.com \u2192 sx-img-ipv4.geo-cdn.cloudfront-cdn.com<\/p>\n

CNAME \u7684\u9650\u5236：<\/p>\n

    \n
  • \n

    \u274c \u4e0d\u80fd\u548c\u5176\u4ed6\u8bb0\u5f55（\u5982 MX）\u5171\u5b58<\/p>\n<\/li>\n

  • \n

    \u274c \u4e0d\u80fd\u6307\u5411 IP<\/p>\n<\/li>\n

  • \n

    \u274c \u9876\u7ea7\u57df\u540d\u4e0d\u63a8\u8350\u7528<\/p>\n<\/li>\n<\/ul>\n

    4.3 SOA \u8bb0\u5f55 \u2014\u2014 \u57df\u540d\u7684"\u6237\u53e3\u672c"<\/h4>\n

    dig example-corp.com SOA +short
    \n\u2192 ns1.clouddns.com. hostmaster@example-corp.com. 2026060512 3600 1200 86400 600<\/p>\n\n\u5b57\u6bb5\u503c\u542b\u4e49<\/tr>\n\n\n\n\n\n\n\n\n
    \u4e3b NS<\/td>\nns1.clouddns.com<\/td>\n\u4e3b\u6743\u5a01 DNS<\/td>\n<\/tr>\n
    \u7ba1\u7406\u5458<\/td>\nhostmaster@hichina.com<\/td>\n\u4e07\u7f51\/\u4e91DNS<\/td>\n<\/tr>\n
    Serial<\/td>\n2026060512<\/td>\n2026-06-05 \u7b2c 12 \u6b21\u4fee\u6539<\/td>\n<\/tr>\n
    Refresh<\/td>\n3600<\/td>\n\u4ece\u670d\u52a1\u5668 1h \u68c0\u67e5\u66f4\u65b0<\/td>\n<\/tr>\n
    Retry<\/td>\n1200<\/td>\n\u5931\u8d25\u540e 20min \u91cd\u8bd5<\/td>\n<\/tr>\n
    Expire<\/td>\n86400<\/td>\n1 \u5929\u8fde\u4e0d\u4e0a\u5c31\u4e22\u5f03<\/td>\n<\/tr>\n
    Min TTL<\/td>\n600<\/td>\n\u6700\u5c0f\u7f13\u5b58 10min<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u8fd0\u7ef4\u4ef7\u503c：\u4fee\u6539 DNS \u540e\u5982\u679c Serial \u6ca1\u9012\u589e，\u4ece\u670d\u52a1\u5668\u4e0d\u4f1a\u540c\u6b65\u3002<\/p>\n

    4.4 MX \u8bb0\u5f55 \u2014\u2014 \u90ae\u4ef6\u8def\u7531<\/h4>\n

    dig example-corp.com MX +short
    \n\u2192 4 mail2.example-corp.com<\/p>\n

    \u4f18\u5148\u7ea7 4（\u6570\u5b57\u8d8a\u5c0f\u8d8a\u4f18\u5148），\u53ea\u6709\u4e00\u53f0\u90ae\u4ef6\u670d\u52a1\u5668\u3002<\/p>\n

    4.5 NS \u8bb0\u5f55 \u2014\u2014 \u8c01\u7ba1\u8fd9\u4e2a\u57df\u540d<\/h4>\n

    dig example-corp.com NS +short
    \n\u2192 ns1.clouddns.com
    \n\u2192 ns2.clouddns.com<\/p>\n

    4.6 TXT \u8bb0\u5f55 \u2014\u2014 \u4e07\u80fd\u5c0f\u7eb8\u6761<\/h4>\n

    dig example-corp.com TXT +short
    \n\u2192 "MS=CC0EABB6…" （\u5fae\u8f6f\u57df\u540d\u9a8c\u8bc1）
    \n\u2192 "v=spf1 a mx ip4:101.226.30.10 ip4:101.226.30.12 -all" （SPF \u9632\u90ae\u4ef6\u4f2a\u9020）<\/p>\n

    \n

    \u4e94\u3001\u4e00\u53e5\u8bdd\u603b\u7ed3<\/h3>\n

    DNS = \u6811\u72b6\u7ed3\u6784 + \u9012\u5f52\u67e5\u8be2 + 6\u79cd\u8bb0\u5f55\u7c7b\u578b<\/p>\n

    \u8fd0\u7ef4\u65b0\u4eba\u5148\u8bb0\u4f4f 3 \u4ef6\u4e8b：<\/p>\n

  • \n

    \u7528 dig +trace \u770b\u5b8c\u6574\u89e3\u6790\u8def\u5f84<\/p>\n<\/li>\n

  • \n

    A \u8bb0\u5f55\u7ed9 IP，CNAME \u7ed9\u522b\u540d（CDN \u7528）<\/p>\n<\/li>\n

  • \n

    SOA \u7684 Serial \u6539\u5b8c DNS \u8981\u9012\u589e<\/p>\n<\/li>\n

    \n

    \u4e0b\u4e00\u7bc7\u6587\u7ae0\u9884\u544a：\u300aDNS\u6392\u67e55\u5927\u5229\u5668：dig\/nslookup\/host\/curl–resolve\u5b9e\u6218\u300b<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u524d\u8a00\u4f5c\u4e3a\u8fd0\u7ef4\u65b0\u4eba，DNS \u662f\u4f60\u6bcf\u5929\u90fd\u4f1a\u6253\u4ea4\u9053\u7684\u57fa\u7840\u8bbe\u65bd\u3002\u4f46\u4f60\u771f\u7684\u77e5\u9053\u5f53\u4f60\u8f93\u5165 www.baidu.com \u540e，\u80cc\u540e\u53d1\u751f\u4e86\u4ec0\u4e48\u5417？\u672c\u6587\u901a\u8fc7\u5b9e\u9645\u73af\u5883 demo.example-corp.com \u7684\u5b8c\u6574\u89e3\u6790\u8fc7\u7a0b，\u5e26\u4f60\u4e00\u6b21\u6027\u641e\u61c2 DNS \u7684\u57fa\u7840\u67b6\u6784\u3002\u4e00\u3001DNS \u7684\u6838\u5fc3\u4f5c\u7528\u4e00\u53e5\u8bdd\u5b9a\u4e49：DNS \u628a\u4eba\u7c7b\u6613\u8bb0\u7684\u57df\u540d\u7ffb\u8bd1\u6210\u673a\u5668\u53ef\u8bfb\u7684 IP \u5730\u5740\u3002\u573a\u666f\u6ca1\u6709 DNS\u6709 DNS\u8bbf\u95ee\u7f51\u7ad9\u8bb0 IP：203.0.113.1<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[245,43,78,44],"topic":[],"class_list":["post-86141","post","type-post","status-publish","format-standard","hentry","category-server","tag-dns","tag-43","tag-78","tag-44"],"yoast_head":"\nDNS\u5165\u95e8\u5fc5\u77e5\uff1a\u4ece\u6839\u670d\u52a1\u5668\u5230\u8bb0\u5f55\u7c7b\u578b\uff0c\u4e00\u5f20\u56fe\u770b\u61c2DNS\u89e3\u6790\u5168\u8fc7\u7a0b - 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