{"id":21934,"date":"2025-01-20T11:48:34","date_gmt":"2025-01-20T03:48:34","guid":{"rendered":"https:\/\/www.simcentric.com\/uncategorized-tc\/how-to-fix-dns-resolution-errors-on-los-angeles-servers\/"},"modified":"2025-01-20T11:49:51","modified_gmt":"2025-01-20T03:49:51","slug":"how-to-fix-dns-resolution-errors-on-los-angeles-servers","status":"publish","type":"post","link":"https:\/\/www.simcentric.com\/tc\/america-dedicated-server-tc\/how-to-fix-dns-resolution-errors-on-los-angeles-servers\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9\u6d1b\u6749\u78ef\u4f3a\u670d\u5668\u4e0a\u7684DNS\u89e3\u6790\u932f\u8aa4\uff1f"},"content":{"rendered":"

\u5728\u6d1b\u6749\u78ef\u4f3a\u670d\u5668<\/a>\u4e0a\u9047\u5230DNS\u89e3\u6790\u932f\u8aa4<\/a>\u53ef\u80fd\u6703\u5c0e\u81f4\u60a8\u7684\u7dda\u4e0a\u696d\u52d9\u9677\u5165\u505c\u9813\u3002\u7121\u8ad6\u60a8\u662f\u57f7\u884c\u95dc\u9375\u696d\u52d9\u61c9\u7528\u7a0b\u5f0f\u9084\u662f\u7ba1\u7406\u9ad8\u6d41\u91cf\u7db2\u7ad9\uff0cDNS\u554f\u984c\u90fd\u9700\u8981\u7acb\u5373\u8655\u7406\u3002\u672c\u7d9c\u5408\u6307\u5357\u5c07\u4ecb\u7d39\u9032\u968e\u6545\u969c\u6392\u9664\u6280\u8853\uff0c\u4e26\u70ba\u4f3a\u670d\u5668\u79df\u7528\u548c\u4f3a\u670d\u5668\u8a17\u7ba1\u5834\u666f\u63d0\u4f9b\u5177\u9ad4\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n

\u7406\u89e3DNS\u89e3\u6790\u932f\u8aa4<\/strong><\/h2>\n

\u7576\u4f3a\u670d\u5668\u7121\u6cd5\u6b63\u78ba\u5c07\u7db2\u57df\u540d\u7a31\u8f49\u63db\u70baIP\u4f4d\u5740\u6642\uff0c\u5c31\u6703\u767c\u751fDNS\u89e3\u6790\u932f\u8aa4\u3002\u5728\u6d1b\u6749\u78ef\u8cc7\u6599\u4e2d\u5fc3\uff0c\u9019\u4e9b\u554f\u984c\u901a\u5e38\u7531\u7db2\u8def\u58c5\u585e\u3001DNS\u8a2d\u5b9a\u932f\u8aa4\u6216\u4e0a\u6e38\u4f9b\u61c9\u5546\u554f\u984c\u5f15\u8d77\u3002\u5e38\u898b\u932f\u8aa4\u8a0a\u606f\u5305\u62ec\u300c\u627e\u4e0d\u5230\u4f3a\u670d\u5668DNS\u4f4d\u5740\u300d\u6216\u300c\u7121\u6cd5\u5b58\u53d6\u6b64\u7db2\u7ad9\u300d\u3002<\/p>\n

\u8b93\u6211\u5011\u4f7f\u7528dig\u6307\u4ee4\u6aa2\u67e5\u5178\u578b\u7684DNS\u67e5\u8a62\u904e\u7a0b\uff1a<\/p>\n

$ dig example.com\r\n\r\n;; QUESTION SECTION:\r\n;example.com.\t\t\tIN\tA\r\n\r\n;; ANSWER SECTION:\r\nexample.com.\t\t172800\tIN\tA\t93.184.216.34\r\n\r\n;; Query time: 48 msec\r\n;; SERVER: 8.8.8.8#53(8.8.8.8)\r\n;; WHEN: Wed Jan 20 12:00:00 EDT 2025\r\n;; MSG SIZE  rcvd: 65<\/code><\/pre>\n
\u5e38\u898bDNS\u932f\u8aa4\u985e\u578b<\/strong><\/h2>\n
\u4e86\u89e3\u932f\u8aa4\u4ee3\u78bc\u5c0d\u65bc\u9ad8\u6548\u6545\u969c\u6392\u9664\u81f3\u95dc\u91cd\u8981\uff1a<\/p>\n
    \n
  • NXDOMAIN (\u4ee3\u78bc3) – \u7db2\u57df\u540d\u7a31\u4e0d\u5b58\u5728<\/li>\n
  • SERVFAIL (\u4ee3\u78bc2) – \u4f3a\u670d\u5668\u672a\u80fd\u5b8c\u6210DNS\u8acb\u6c42<\/li>\n
  • REFUSED (\u4ee3\u78bc5) – DNS\u4f3a\u670d\u5668\u62d2\u7d55\u8655\u7406\u67e5\u8a62<\/li>\n
  • TIMEOUT – DNS\u4f3a\u670d\u5668\u5728\u6307\u5b9a\u6642\u9593\u5167\u672a\u56de\u61c9<\/li>\n<\/ul>\n
    \u6839\u56e0\u5206\u6790<\/strong><\/h2>\n
    \u5728\u6df1\u5165\u89e3\u6c7a\u65b9\u6848\u4e4b\u524d\uff0c\u8b93\u6211\u5011\u4f7f\u7528\u8a3a\u65b7\u5de5\u5177\u78ba\u5b9a\u5177\u9ad4\u539f\u56e0\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u547d\u4ee4\u5217\u5de5\u5177\u7684\u7cfb\u7d71\u65b9\u6cd5\uff1a<\/p>\n
    # \u6aa2\u67e5\u7576\u524dDNS\u8a2d\u5b9a\r\ncat \/etc\/resolv.conf\r\n\r\n# \u6e2c\u8a66DNS\u89e3\u6790\r\nnslookup yourdomain.com\r\n\r\n# \u8ffd\u8e64DNS\u67e5\u8a62\u8def\u5f91\r\ntraceroute yourdomain.com\r\n\r\n# \u5168\u7403\u6aa2\u67e5DNS\u50b3\u64ad\r\ndig +trace yourdomain.com @8.8.8.8<\/code><\/pre>\n
    \u6d1b\u6749\u78ef\u8cc7\u6599\u4e2d\u5fc3\u7684\u7db2\u8def\u7ba1\u7406\u54e1\u7d93\u5e38\u9047\u5230\u4ee5\u4e0b\u5177\u9ad4\u60c5\u6cc1\uff1a<\/p>\n
      \n
    • ISP\u5c64\u7d1aDNS\u5feb\u53d6\u6c61\u67d3<\/li>\n
    • \u908a\u754c\u9598\u9053\u5354\u5b9a(BGP)\u8def\u7531\u554f\u984c<\/li>\n
    • \u9632\u706b\u7246\u898f\u5247\u963b\u6b62\u57e0\u865f53\/UDP\u548c53\/TCP\u4e0a\u7684DNS\u6d41\u91cf<\/li>\n
    • \u905e\u8ff4DNS\u89e3\u6790\u5668\u6545\u969c<\/li>\n<\/ul>\n
      \u9032\u968e\u6545\u969c\u6392\u9664\u6b65\u9a5f<\/strong><\/h2>\n
      \u8b93\u6211\u5011\u5be6\u65bd\u7cfb\u7d71\u5316\u7684\u5075\u932f\u65b9\u6cd5\uff1a<\/p>\n
      # 1. \u9a57\u8b49\u672c\u5730DNS\u89e3\u6790\u5668\u529f\u80fd\r\nsystemctl status systemd-resolved\r\n\r\n# 2. \u6aa2\u67e5DNS\u56de\u61c9\u6642\u9593\r\ndig yourdomain.com +stats\r\n\r\n# 3. \u6e2c\u8a66\u5099\u7528DNS\u4f3a\u670d\u5668\r\ndig @1.1.1.1 yourdomain.com\r\ndig @8.8.8.8 yourdomain.com\r\n\r\n# 4. \u76e3\u63a7DNS\u6d41\u91cf\r\ntcpdump -i any port 53<\/code><\/pre>\n
      \u5728\u7ba1\u7406\u6d1b\u6749\u78ef\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\u6642\uff0c\u9700\u8981\u7279\u5225\u6ce8\u610f\uff1a<\/p>\n