{"id":35953,"date":"2026-09-04T17:22:52","date_gmt":"2026-09-04T09:22:52","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-tw\/why-can-a-server-be-pinged-but-web-pages-are-inaccessible\/"},"modified":"2026-09-04T17:37:32","modified_gmt":"2026-09-04T09:37:32","slug":"why-can-a-server-be-pinged-but-web-pages-are-inaccessible","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/why-can-a-server-be-pinged-but-web-pages-are-inaccessible\/","title":{"rendered":"\u4f3a\u670d\u5668\u53ef\u4ee5ping\u901a\uff0c\u4f46\u7db2\u9801\u7121\u6cd5\u5b58\u53d6\u662f\u4ec0\u9ebc\u539f\u56e0\uff1f"},"content":{"rendered":"<p>\u4f3a\u670d\u5668ping\u6e2c\u8a66\u6210\u529f\uff0c\u4f46\u700f\u89bd\u5668\u5b58\u53d6\u7db2\u7ad9\u6642\u6301\u7e8c\u903e\u6642\u3002\u9019\u662f\u4ec0\u9ebc\u72c0\u6cc1\uff1f\u51fa\u73fe\u8a72\u73fe\u8c61\u7684\u6838\u5fc3\u539f\u56e0\u662fping\u8207<a href=\"https:\/\/www.varidata.com\/zh-tw\/server\/hk\/\" target=\"_blank\">\u7db2\u9801\u5b58\u53d6<\/a>\u4f7f\u7528\u5b8c\u5168\u4e0d\u540c\u7684\u5354\u5b9a\u8207\u9023\u63a5\u57e0\u3002ping\u57fa\u65bcICMP\u5354\u5b9a\uff0c\u800c\u7db2\u9801\u6d41\u91cf\u4f9d\u976080\u9023\u63a5\u57e0\u7684HTTP\u5354\u5b9a\u8207443\u9023\u63a5\u57e0\u7684HTTPS\u5354\u5b9a\u50b3\u8f38\u3002\u6545\u969c\u6839\u6e90\u901a\u5e38\u4f86\u81ea<a href=\"https:\/\/www.varidata.com\/zh-tw\/knowledge-tc\/the-role-of-japan-dynamic-ip-proxies-in-web-scraping\/\" target=\"_blank\">Web\u670d\u52d9<\/a>\u7a0b\u5f0f\u3001\u9632\u706b\u7246\u539f\u5247\u3001DNS\u8a2d\u5b9a\u6216\u662f\u4f3a\u670d\u5668\u8cc7\u6e90\u74f6\u9838\u3002ping\u9023\u901a\u50c5\u4ee3\u8868\u4f3a\u670d\u5668\u5728\u7db2\u8def\u5c64\u5b58\u6d3b\uff0c\u7121\u6cd5\u4fdd\u8b49\u4e0a\u5c64\u7db2\u9801\u696d\u52d9\u53ef\u4ee5\u6b63\u5e38\u5b58\u53d6\u3002\u7121\u9700\u64d4\u5fc3\uff0c\u9019\u662f\u4e00\u985e\u5341\u5206\u5e38\u898b\u7684\u6545\u969c\uff0c\u6210\u56e0\u7bc4\u570d\u56fa\u5b9a\u3002\u63a5\u4e0b\u4f86\u6211\u5011\u9010\u4e00\u62c6\u89e3\u554f\u984c\u3002\u641e\u61c2\u70ba\u4ec0\u9ebcping\u6b63\u5e38\u4f46\u7db2\u7ad9\u7121\u6cd5\u5b58\u53d6\uff0c\u53ef\u4ee5\u5e6b\u52a9\u4f60\u5feb\u901f\u5b9a\u4f4d\u771f\u5be6\u6545\u969c\u9ede\u3002<\/p>\n<h2>\u6838\u5fc3\u91cd\u9ede<\/h2>\n<ul>\n<li>\n<p>ping\u4f7f\u7528ICMP\u5354\u5b9a\uff0c\u7db2\u9801\u5b58\u53d6\u4f7f\u7528\u57f7\u884c\u572880\u3001443\u9023\u63a5\u57e0\u4e0a\u7684HTTP\/HTTPS\u5354\u5b9a\u3002<\/p>\n<\/li>\n<li>\n<p>ping\u8acb\u6c42\u6210\u529f\u50c5\u8b49\u660e\u4f3a\u670d\u5668\u5728\u7db2\u8def\u5c64\u53ef\u9023\u901a\u3002<\/p>\n<\/li>\n<li>\n<p>DNS\u89e3\u6790\u7570\u5e38\u6216\u9632\u706b\u7246\u539f\u5247\u6514\u622a\u7db2\u9801\u6d41\u91cf\uff0c\u4f46\u653e\u884cping\u5c01\u5305\uff0c\u662f\u9ad8\u983b\u6545\u969c\u539f\u56e0\u3002<\/p>\n<\/li>\n<li>\n<p>\u6392\u9664\u6642\u9700\u8981\u6aa2\u67e5DNS\u89e3\u6790\u7d50\u679c\u3001\u9023\u63a5\u57e0\u53ef\u9023\u901a\u6027\u4ee5\u53ca\u4f3a\u670d\u5668\u670d\u52d9\u57f7\u884c\u72c0\u614b\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f9d\u5c64\u7d1a\u7cfb\u7d71\u5316\u6392\u932f\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u4e26\u89e3\u6c7a\u554f\u984c\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u4f3a\u670d\u5668ping\u6b63\u5e38\uff0c\u7db2\u7ad9\u537b\u7121\u6cd5\u5b58\u53d6\u7684\u5177\u9ad4\u539f\u56e0<\/h2>\n<h3>ping\u8207ICMP\u5354\u5b9a\u8a73\u89e3<\/h3>\n<p>\u57f7\u884cping\u6307\u4ee4\u6642\uff0c\u672c\u6a5f\u88dd\u7f6e\u6703\u5411\u76ee\u6a19\u4e3b\u6a5f\u50b3\u9001\u4e00\u689dICMP\u56de\u61c9\u8acb\u6c42\u5c01\u5305\u3002\u76ee\u6a19\u4f3a\u670d\u5668\u50b3\u56de\u4e00\u689dICMP\u56de\u61c9\u7b54\u8986\u5c01\u5305\u3002\u9019\u5957\u4e92\u52d5\u7528\u4f86\u9a57\u8b49\u5169\u53f0\u88dd\u7f6e\u4e4b\u9593\u7684\u7db2\u8def\u93c8\u8def\u662f\u5426\u66a2\u901a\u3002ping\u6703\u7d71\u8a08\u5c01\u5305\u5f80\u8fd4\u8017\u6642\uff0c\u85c9\u6b64\u78ba\u8a8d\u57fa\u790e\u9023\u901a\u6027\u8207\u7db2\u8def\u5ef6\u9072\u3002\u5982\u679c\u50b3\u56de\u5ef6\u9072\u8f03\u4f4e\uff0c\u4f8b\u598213\u201123\u6beb\u79d2\uff0c\u4ee3\u8868\u7db2\u8def\u54c1\u8cea\u826f\u597d\uff1b\u56de\u61c9\u6642\u9593\u5287\u70c8\u6ce2\u52d5\u5247\u8aaa\u660e\u7db2\u8def\u5b58\u5728\u58c5\u585e\u3002<\/p>\n<p>ICMP\u4e5f\u5c31\u662f\u7db2\u969b\u7db2\u8def\u63a7\u5236\u8a0a\u606f\u5354\u5b9a\uff0c\u662fTCP\/IP\u5354\u5b9a\u53e2\u4e2d\u7684\u57fa\u790e\u5354\u5b9a\u3002\u7db2\u8def\u88dd\u7f6e\u4f9d\u9760\u8a72\u5354\u5b9a\u56de\u5831\u8cc7\u6599\u50b3\u8f38\u904e\u7a0b\u4e2d\u51fa\u73fe\u7684\u5404\u985e\u7570\u5e38\uff0c\u6838\u5fc3\u4f5c\u7528\u662f\u78ba\u8a8d\u5c01\u5305\u80fd\u5426\u6309\u6642\u62b5\u9054\u76ee\u6a19\u4f4d\u5740\uff0c\u662f\u7db2\u8def\u5831\u932f\u6a5f\u5236\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u74b0\u3002\u4f46ICMP\u5de5\u4f5c\u5728OSI\u6a21\u578b\u7b2c3\u5c64\u2014\u2014\u7db2\u8def\u5c64\u3002\u5b83\u50c5\u80fd\u78ba\u8a8dIP\u5c64\u9762\u4f3a\u670d\u5668\u4e0a\u7dda\uff0c\u4e0d\u6703\u9a57\u8b49\u66f4\u9ad8\u5c64\u7d1a\u7684\u696d\u52d9\u72c0\u614b\u3002<\/p>\n<p>\u6211\u5011\u53ef\u4ee5\u7528\u4e00\u500b\u6bd4\u55bb\u4f86\u7406\u89e3\uff1aping\u5c31\u50cf\u6572\u4e00\u68df\u5927\u578b\u8fa6\u516c\u5927\u6a13\u7684\u5927\u9580\u3002\u6572\u9580\u53ea\u80fd\u78ba\u8a8d\u5927\u6a13\u771f\u5be6\u5b58\u5728\u3001\u5167\u90e8\u53ef\u80fd\u6709\u4eba\uff0c\u537b\u7121\u6cd5\u78ba\u8a8d\u6a13\u5167\u67d0\u4e00\u9593\u8fa6\u516c\u5ba4\u7684\u96fb\u8a71\u80fd\u4e0d\u80fd\u6253\u901a\u3002HTTP\u5b58\u53d6\u5247\u76f8\u7576\u65bc\u64a5\u6253\u8fa6\u516c\u5ba4\u5167\u90e8\u5206\u6a5f\u3002\u5927\u6a13\u672c\u8eab\u5b8c\u597d\u7121\u640d\uff0c\u4f46\u5206\u6a5f\u7dda\u8def\u53ef\u80fd\u5df2\u7d93\u4e2d\u65b7\u3002\u6572\u9580\u80fd\u5920\u5f97\u5230\u56de\u61c9\uff0c\u4f46\u662f\u96fb\u8a71\u547c\u53eb\u7121\u4eba\u61c9\u7b54\u3002<\/p>\n<h3>HTTP\u8207\u7db2\u9801\u6d41\u91cf\u57fa\u790e\u539f\u7406<\/h3>\n<p>\u700f\u89bd\u7db2\u9801\u9996\u5148\u9700\u8981\u5b8c\u6210DNS\u89e3\u6790\uff0c\u96a8\u5f8c\u5efa\u7acbHTTP\u6216HTTPS\u9023\u7dda\u3002\u9019\u985e\u5354\u5b9a\u5de5\u4f5c\u5728OSI\u7b2c7\u5c64\u2014\u2014\u61c9\u7528\u5c64\uff0c\u4f9d\u9760TCP\u5354\u5b9a\u5728\u6307\u5b9a\u9023\u63a5\u57e0\u5efa\u7acb\u9023\u7dda\u3002HTTP\u4f7f\u752880\u9023\u63a5\u57e0\uff0cHTTPS\u4f7f\u7528443\u9023\u63a5\u57e0\u3002\u4e8c\u8005\u7684\u8cc7\u6599\u50b3\u8f38\u65b9\u5f0f\u548cICMP\u5b8c\u5168\u4e0d\u540c\u3002<\/p>\n<p>HTTP\u5354\u5b9a\u4ee5\u660e\u6587\u5f62\u5f0f\u50b3\u8f38\u8cc7\u6599\uff0c\u50b3\u8f38\u5167\u5bb9\u5bb9\u6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d\u5b9a\u932f\u8aa4\u6703\u76f4\u63a5\u5f15\u767c\u89e3\u6790\u6545\u969c\uff1a\u7db2\u57df\u540d\u7a31\u8a3b\u518a\u5546\u8655\u586b\u5beb\u932f\u8aa4\u7684NS\u8a18\u9304\uff0c\u5c0e\u81f4\u6240\u6709A\u8a18\u9304\u3001CNAME\u8a18\u9304\u5c0d\u5916\u5931\u6548\uff1b\u8a18\u9304\u985e\u578b\u8a2d\u5b9a\u51fa\u932f\u2014\u2014\u50c5\u7d66<code>www<\/code>\u65b0\u589eA\u8a18\u9304\uff0c\u88f8\u7db2\u57df\u537b\u672a\u8a2d\u5b9a\uff1b\u4f3a\u670d\u5668\u9077\u79fb\u6642A\u8a18\u9304\u586b\u5beb\u932f\u8aa4\uff0c\u6d41\u91cf\u88ab\u5c0e\u5411\u932f\u8aa4\u4f4d\u5740\uff1b\u6839\u7db2\u57df\u8a2d\u5b9aCNAME\u8a18\u9304\u4e0d\u7b26\u5408\u898f\u7bc4\uff0c\u5f15\u767c\u885d\u7a81\u3002\u66fe\u6709\u6848\u4f8b\uff1adig\u67e5\u8a62\u986f\u793aCNAME\u8a2d\u5b9a\u7121\u8aa4\uff0c\u4f46\u700f\u89bd\u5668\u6301\u7e8c\u903e\u6642\uff1b\u5207\u63db\u70baA\u8a18\u9304\u4e26\u6e05\u7a7a\u700f\u89bd\u5668\u5feb\u53d6\u5f8c\u696d\u52d9\u6062\u5fa9\u6b63\u5e38\u3002<\/p>\n<blockquote>\n<p>NS\u8a18\u9304\u6307\u5411CNAME\u6703\u5f15\u767c\u56b4\u91cd\u6545\u969c\u3002RFC 1912\u898f\u7bc4\u660e\u78ba\u8aaa\u660e\uff1a\u300cNS\u8a18\u9304\u7e6b\u7d50CNAME\u5c6c\u65bc\u932f\u8aa4\u8a2d\u5b9a\uff0c\u6703\u8207\u76ee\u524dBIND\u7db2\u57df\u540d\u7a31\u670d\u52d9\u7a0b\u5f0f\u7522\u751f\u56b4\u91cd\u885d\u7a81\u3002\u300d\u8a72\u932f\u8aa4\u6703\u89f8\u767cSERVFAIL\u56de\u61c9\uff0c\u76f4\u63a5\u9020\u6210\u89e3\u6790\u5b8c\u5168\u4e2d\u65b7\u3002<\/p>\n<\/blockquote>\n<p>\u53ef\u4ee5\u4f7f\u7528\u547d\u4ee4\u5217\u5de5\u5177\u6392\u9664DNS\u554f\u984c\u3002\u57f7\u884c <code>nslookup shturl.cc\/ycKS<\/code>\uff0c\u67e5\u770b\u56de\u61c9\u7684DNS\u4f3a\u670d\u5668\u8207\u50b3\u56deIP\uff1b\u57f7\u884c <code>nslookup shturl.cc\/ycKS 8.8.8.8<\/code>\uff0c\u5c0d\u6bd4Google\u516c\u7528DNS\u7684\u50b3\u56de\u7d50\u679c\uff1b\u57f7\u884c <code>dig shturl.cc\/ycKS +trace<\/code>\uff0c\u8ffd\u8e64\u5f9e\u6839\u7db2\u57df\u540d\u7a31\u4f3a\u670d\u5668\u5230\u6388\u6b0a\u4f3a\u670d\u5668\u7684\u5b8c\u6574\u67e5\u8a62\u93c8\u8def\uff0c\u5b9a\u4f4d\u89e3\u6790\u4e2d\u65b7\u7684\u5177\u9ad4\u7bc0\u9ede\u3002\u672c\u6a5f\u9810\u8a2dDNS\u7121\u50b3\u56de\u7d50\u679c\uff0c\u4f46Google DNS\u6b63\u5e38\uff0c\u8aaa\u660e\u4e0a\u6e38DNS\u670d\u52d9\u5546\u51fa\u73fe\u6545\u969c\u3002\u6574\u689d\u89e3\u6790\u93c8\u8def\u4e2d\u4efb\u610f\u4e00\u74b0\u51fa\u932f\uff0c\u90fd\u6703\u5c0e\u81f4\u5b58\u53d6\u5931\u6557\u3002<\/p>\n<h3>\u9632\u706b\u7246\u898f\u5247\u6514\u622a\u7db2\u9801\u9023\u63a5\u57e0<\/h3>\n<p><a target=\"_blank\" href=\"https:\/\/www.varidata.com\/zh-tw\/server\/tokyo\/anti-ddos\/\">\u9632\u706b\u7246<\/a>\u53ef\u4ee5\u8a2d\u5b9a\u70ba\u653e\u884cICMP\u6d41\u91cf\uff0c\u540c\u6642\u5c01\u939680\u3001443\u9023\u63a5\u57e0\u7684TCP\u9023\u7dda\u3002\u8a72\u539f\u5247\u6703\u4f7f\u5f97ping\u6e2c\u8a66\u6210\u529f\uff0cHTTP\u8207HTTPS\u5b58\u53d6\u5fb9\u5e95\u4e2d\u65b7\u3002\u5f88\u591a\u7dad\u904b\u4eba\u54e1\u70ba\u4e86\u65b9\u4fbf\u7db2\u8def\u8a3a\u65b7\u958b\u555fICMP\u653e\u884c\u898f\u5247\uff0c\u537b\u5ffd\u7565\u4e86\u7db2\u9801\u6d41\u91cf\u7684\u653e\u884c\u539f\u5247\u3002<\/p>\n<p>\u9632\u706b\u7246\u4f9d\u64da\u5354\u5b9a\u548c\u9023\u63a5\u57e0\u904e\u6ffe\u5c01\u5305\u3002\u653e\u884cICMP\u56de\u61c9\u8acb\u6c42\u7684\u898f\u5247\uff0c\u4e26\u4e0d\u6703\u81ea\u52d5\u653e\u884cTCP\u9023\u7dda\u3002\u4f60\u9700\u8981\u55ae\u7368\u8a2d\u5b9a\u539f\u5247\u5141\u8a31\u5916\u90e8\u5b58\u53d680\u548c443\u9023\u63a5\u57e0\u3002\u96f2\u7aef\u5b89\u5168\u7fa4\u7d44\u3001iptables\u8a2d\u5b9a\u3001\u786c\u9ad4\u9632\u706b\u7246\u90fd\u9700\u8981\u624b\u52d5\u958b\u555f\u5c0d\u61c9\u9023\u63a5\u57e0\u6b0a\u9650\u3002<\/p>\n<p>\u9023\u63a5\u57e0\u88ab\u6514\u622a\u6642\uff0c\u9632\u706b\u7246\u6703\u975c\u9ed8\u4e1f\u68c4\u5b58\u53d6\u5c01\u5305\u3002\u9023\u63a5\u57e0\u6383\u63cf\u5de5\u5177\u7121\u6cd5\u5224\u65b7\u9023\u63a5\u57e0\u662f\u95dc\u9589\u9084\u662f\u88ab\u904e\u6ffe\uff0c\u56e0\u70ba\u5c01\u5305\u6c92\u6709\u4efb\u4f55\u56de\u61c9\u3002\u9047\u5230\u8a72\u73fe\u8c61\u6642\uff0c\u9700\u8981\u6aa2\u67e5\u9632\u706b\u7246\u898f\u5247\u3001\u8def\u7531\u5668\u8a2d\u5b9a\u4ee5\u53ca\u71df\u904b\u5546\u5074\u9650\u5236\u3002<\/p>\n<p>\u591a\u6b3e\u5de5\u5177\u53ef\u4ee5\u6aa2\u6e2c\u9023\u63a5\u57e0\u53ef\u9023\u901a\u6027\uff1aNmap\u652f\u63f4\u591a\u7a2e\u6383\u63cf\u65b9\u5f0f\u8fa8\u8b58\u958b\u653e\u9023\u63a5\u57e0\uff1bNetCat\u53ef\u4ee5\u5b8c\u6210TCP\u9023\u63a5\u57e0\u6383\u63cf\u8207\u901a\u9053\u6e2c\u8a66\uff1b\u7dda\u4e0a\u9023\u63a5\u57e0\u6aa2\u6e2c\u5de5\u5177\u80fd\u5920\u5f9e\u516c\u7db2\u5feb\u901f\u9a57\u8b49\u9023\u63a5\u57e0\u72c0\u614b\u3002\u85c9\u7531\u9019\u4e9b\u5de5\u5177\u5373\u53ef\u78ba\u8a8d\u9632\u706b\u7246\u662f\u5426\u6514\u622a\u7db2\u9801\u6d41\u91cf\uff0c\u800cping\u4f9d\u820a\u4fdd\u6301\u6b63\u5e38\u9023\u901a\u3002<\/p>\n<p>DNS\u8a2d\u5b9a\u932f\u8aa4\u52a0\u4e0a\u56b4\u683c\u7684\u9632\u706b\u7246\u539f\u5247\uff0c\u662fping\u6b63\u5e38\u4f46\u7db2\u9801\u7121\u6cd5\u5b58\u53d6\u7684\u6700\u4e3b\u8981\u539f\u56e0\u3002\u5169\u985e\u6545\u969c\u90fd\u7368\u7acb\u65bcICMP\u5354\u5b9a\uff0c\u9019\u4e5f\u5c31\u89e3\u91cb\u4e86\u7db2\u8def\u9023\u901a\u6027\u6aa2\u6e2c\u6b63\u5e38\uff0c\u700f\u89bd\u5668\u8acb\u6c42\u537b\u5931\u6557\u7684\u73fe\u8c61\u3002<\/p>\n<h2>\u5206\u6b65\u6392\u932f\u64cd\u4f5c\u6307\u5357<\/h2>\n<h3>\u512a\u5148\u6aa2\u67e5DNS\u8207\u57fa\u790e\u9023\u901a\u6027<\/h3>\n<p>\u7db2\u8def\u6392\u932f\u7b2c\u4e00\u6b65\u5148\u6821\u9a57DNS\u3002\u4f3a\u670d\u5668ping\u6b63\u5e38\u4f46\u700f\u89bd\u5668\u6253\u4e0d\u958b\uff0c\u5f88\u6709\u53ef\u80fd\u662f\u7db2\u57df\u540d\u7a31\u7121\u6cd5\u8f49\u63db\u6210IP\u4f4d\u5740\u3002\u958b\u555f\u7d42\u7aef\u6a5f\u57f7\u884c <code>nslookup shturl.cc\/ycKS<\/code>\uff0c\u67e5\u770b\u56de\u61c9DNS\u4f3a\u670d\u5668\u548c\u50b3\u56deIP\uff1b\u518d\u57f7\u884c <code>nslookup shturl.cc\/ycKS 8.8.8.8<\/code>\uff0c\u5c0d\u6bd4\u516c\u7db2\u89e3\u6790\u7d50\u679c\u3002\u672c\u6a5fDNS\u89e3\u6790\u5931\u6557\u4f46Google DNS\u6b63\u5e38\uff0c\u4ee3\u8868\u4f60\u7684DNS\u670d\u52d9\u5546\u5b58\u5728\u6545\u969c\u3002<\/p>\n<p>\u6df1\u5ea6\u6392\u9664\u53ef\u4ee5\u57f7\u884c <code>dig shturl.cc\/ycKS +trace<\/code>\uff0c\u5b8c\u6574\u8ffd\u8e64\u7db2\u57df\u540d\u7a31\u89e3\u6790\u93c8\u8def\uff0c\u7cbe\u6e96\u5b9a\u4f4d\u89e3\u6790\u4e2d\u65b7\u9ede\u3002\u4f60\u9084\u53ef\u4ee5\u55ae\u7368\u67e5\u8a62\u4e0d\u540c\u985e\u578b\u89e3\u6790\u8a18\u9304\uff1a\u57f7\u884c <code>nslookup -type=AAAA shturl.cc\/ycKS<\/code> \u6aa2\u67e5IPv6\u8a18\u9304\uff1b\u57f7\u884c <code>nslookup -type=MX shturl.cc\/ycKS<\/code> \u67e5\u770b\u90f5\u4ef6\u4f3a\u670d\u5668\u8a2d\u5b9a\u3002\u4f9d\u7167\u4f4d\u5740\u3001\u8def\u7531\u3001DNS\u3001\u9023\u63a5\u57e0\u3001\u9632\u706b\u7246\u3001\u61c9\u7528\u7a0b\u5f0f\u65e5\u8a8c\u7684\u6a19\u6e96\u5316\u6392\u9664\u6d41\u7a0b\uff0c90%\u7684\u6545\u969c\u90fd\u53ef\u4ee5\u572810\u5206\u9418\u5167\u5b9a\u4f4d\uff0c\u5927\u90e8\u5206\u554f\u984c\u5728\u524d\u4e09\u6b65\u5373\u53ef\u4fee\u5fa9\u3002<\/p>\n<p>\u540c\u6642\u6e05\u9664\u700f\u89bd\u5668\u5feb\u53d6\u5f8c\u91cd\u65b0\u5617\u8a66\u5b58\u53d6\u3002\u5982\u679c\u7db2\u57df\u540d\u7a31\u89e3\u6790\u7d50\u679c\u6b63\u5e38\uff0c\u4f46\u9801\u9762\u4f9d\u820a\u7121\u6cd5\u8f09\u5165\uff0c\u7e7c\u7e8c\u4e0b\u4e00\u6b65\u9023\u63a5\u57e0\u53ef\u9023\u901a\u6027\u6e2c\u8a66\u3002<\/p>\n<h3>\u76f4\u63a5\u6e2c\u8a66Web\u670d\u52d9\u8207\u9023\u63a5\u57e0\u72c0\u614b<\/h3>\n<p>\u4f7f\u7528 <code>telnet yourserver.com 80<\/code> \u6216 <code>curl -I http:\/\/yourserver.com<\/code> \u6e2c\u8a66\u7db2\u9801\u9023\u63a5\u57e0\u9023\u901a\u3002\u9023\u7dda\u6210\u529f\u6703\u50b3\u56deHTTP\u56de\u61c9\u6a19\u982d\uff1b\u8acb\u6c42\u903e\u6642\u5247\u8aaa\u660e\u9632\u706b\u7246\u6216\u7db2\u8def\u5c64\u9762\u6514\u622a\u5b58\u53d6\u3002\u7576\u9632\u706b\u7246\u975c\u9ed8\u4e1f\u68c4\u5c01\u5305\u800c\u975e\u4e3b\u52d5\u62d2\u7d55\u9023\u7dda\u6642\uff0c\u5b58\u53d6\u8acb\u6c42\u5c31\u6703\u903e\u6642\u3002\u5e38\u898b\u8a98\u56e0\u5305\u62ec\u670d\u52d9\u7a0b\u5e8f\u672a\u555f\u52d5\u3001\u9632\u706b\u7246\u6514\u622a\u3001\u76ee\u6a19\u8def\u7531\u4e0d\u53ef\u9054\u3002<\/p>\n<p>\u63a5\u4e0b\u4f86\u6821\u9a57\u4f3a\u670d\u5668\u670d\u52d9\u72c0\u614b\uff1a\u57f7\u884c <code>sudo systemctl status apache2<\/code> \u6216 <code>ps aux | grep nginx<\/code>\uff0c\u78ba\u8a8dWeb\u670d\u52d9\u6b63\u5728\u57f7\u884c\uff1b\u57f7\u884c <code>sudo lsof -i :80<\/code> \u67e5\u770b\u76e3\u807d80\u9023\u63a5\u57e0\u7684\u7a0b\u5e8f\u3002\u5982\u679cNginx\u555f\u52d5\u5931\u6557\uff0c\u53ef\u4ee5\u67e5\u770b <code>\/var\/log\/nginx\/error.log<\/code>\uff0c\u985e\u4f3c <code>bind() to 0.0.0.0:80 failed<\/code> \u7684\u932f\u8aa4\u4ee3\u8868\u9023\u63a5\u57e0\u885d\u7a81\u3002\u91cd\u65b0\u555f\u52d5\u670d\u52d9\u524d\u5148\u57f7\u884c <code>sudo nginx -t<\/code> \u6821\u9a57\u8a2d\u5b9a\u6a94\u5408\u6cd5\u6027\u3002<\/p>\n<p>\u4f7f\u7528 <code>top<\/code> \u6216 <code>htop<\/code> \u76e3\u63a7\u4f3a\u670d\u5668\u8cc7\u6e90\u4f54\u7528\u3002CPU\u6216\u8a18\u61b6\u9ad4\u4f54\u7528\u904e\u9ad8\u6642\uff0c\u4f3a\u670d\u5668\u7121\u6cd5\u63a5\u6536\u65b0\u7684\u696d\u52d9\u9023\u7dda\u3002\u9019\u5c31\u6703\u51fa\u73fe\u4f3a\u670d\u5668\u53ef\u4ee5\u56de\u61c9\u7db2\u8def\u5c64ping\u5c01\u5305\uff0c\u4f46\u662f\u6c92\u6709\u591a\u9918\u8cc7\u6e90\u8655\u7406HTTP\u3001HTTPS\u8acb\u6c42\u7684\u73fe\u8c61\u3002\u898f\u7bc4\u7684\u7db2\u8def\u6392\u932f\u6d41\u7a0b\u53ef\u4ee5\u5feb\u901f\u89e3\u6c7a\u7d55\u5927\u591a\u6578\u5e38\u898b\u6545\u969c\uff0c\u6975\u5c11\u6578\u5834\u666f\u624d\u9700\u8981\u806f\u7e6b\u5ee0\u5546\u6280\u8853\u652f\u63f4\u3002<\/p>\n<div class=\"qc-divider-wrapper\">\n<div class=\"qc-divider\" style=\"border-top-style: solid;width: 100%\"><\/div>\n<\/div>\n<p>ping\u9023\u901a\u50c5\u4ee3\u8868\u4f3a\u670d\u5668\u5728\u7db2\u8def\u5c64\u9762\u4e0a\u7dda\uff0c\u4e0d\u80fd\u4fdd\u8b49Web\u696d\u52d9\u6b63\u5e38\u57f7\u884c\uff0c\u4e5f\u4e0d\u80fd\u78ba\u4fddHTTP\u3001HTTPS\u5c01\u5305\u53ef\u4ee5\u9806\u5229\u901a\u884c\u3002\u7576\u4f3a\u670d\u5668ping\u6e2c\u8a66\u6210\u529f\uff0c\u7db2\u7ad9\u537b\u5b58\u53d6\u5931\u6557\u6642\uff0c\u6545\u969c\u539f\u56e0\u57fa\u672c\u4e0a\u5206\u70ba\uff1aDNS\u89e3\u6790\u6545\u969c\u3001\u9632\u706b\u7246\u5b58\u53d6\u9650\u5236\u3001Web\u670d\u52d9\u7a0b\u5f0f\u7570\u5e38\u3001\u4f3a\u670d\u5668\u8cc7\u6e90\u8017\u76e1\u3002<\/p>\n<p>\u8acb\u4f9d\u7167\u6a19\u6e96\u5316\u6d41\u7a0b\u4f9d\u5e8f\u6392\u9664\uff1a\u5148\u6821\u9a57DNS\u89e3\u6790\u7d50\u679c\uff0c\u518d\u6e2c\u8a66\u9023\u63a5\u57e0\u53ef\u9023\u901a\u6027\uff0c\u6700\u5f8c\u6838\u67e5\u4f3a\u670d\u5668\u670d\u52d9\u57f7\u884c\u72c0\u614b\u3002\u9019\u5957\u65b9\u6cd5\u53ef\u4ee5\u5feb\u901f\u9694\u96e2\u6545\u969c\u5c64\u7d1a\u3002ping\u6b63\u5e38\u8aaa\u660e\u7db2\u8def\u93c8\u8def\u66a2\u901a\uff0c\u554f\u984c\u4e00\u5b9a\u51fa\u73fe\u5728\u66f4\u9ad8\u7684\u61c9\u7528\u5c64\u3002<\/p>\n<p>\u4f9d\u7167\u4e0a\u8ff0\u6b65\u9a5f\u9010\u4e00\u6392\u9664\u5b9a\u4f4d\u554f\u984c\uff0c\u5373\u53ef\u6062\u5fa9\u7db2\u7ad9\u5b58\u53d6\u3002\u5206\u5c64\u9010\u9805\u6392\u9664\uff0c\u6700\u7d42\u4e00\u5b9a\u53ef\u4ee5\u627e\u5230\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2>\u5e38\u898b\u554f\u984c\u89e3\u7b54<\/h2>\n<h3>\u4f3a\u670d\u5668\u53ef\u4ee5ping\u901a\uff0c\u662f\u5426\u4ecd\u7136\u5b58\u5728DNS\u6545\u969c\uff1f<\/h3>\n<p>\u662f\u7684\u3002ping\u53ef\u4ee5\u76f4\u63a5\u586b\u5bebIP\u4f4d\u5740\u5b58\u53d6\u4f3a\u670d\u5668\uff0c\u800c\u700f\u89bd\u5668\u5fc5\u9808\u5148\u5b8c\u6210\u7db2\u57df\u540d\u7a31\u89e3\u6790\u3002\u4e00\u65e6DNS\u89e3\u6790\u5931\u6548\uff0cping\u6e2c\u8a66\u6b63\u5e38\uff0c\u4f46\u7db2\u7ad9\u7121\u6cd5\u958b\u555f\u3002\u8acb\u6aa2\u67e5\u7db2\u7ad9\u5c0d\u61c9\u7684\u4f3a\u670d\u5668DNS\u89e3\u6790\u8a18\u9304\u3002<\/p>\n<h3>\u9632\u706b\u7246\u5982\u4f55\u505a\u5230\u653e\u884cping\u3001\u6514\u622a\u7db2\u9801\u6d41\u91cf\uff1f<\/h3>\n<p>\u9632\u706b\u7246\u4f9d\u7167\u5354\u5b9a\u6bd4\u5c0d\u539f\u5247\u3002ping\u4f7f\u7528\u7684ICMP\u5c01\u5305\u88ab\u653e\u884c\uff0c\u800cHTTPS\u4f9d\u8cf4TCP\u5354\u5b9a\u5b58\u53d680\/443\u9023\u63a5\u57e0\uff0c\u5b58\u53d6\u539f\u5247\u88ab\u505c\u7528\u3002\u4f3a\u670d\u5668\u7684\u7db2\u8def\u5143\u4ef6\u76f4\u63a5\u4e1f\u68c4\u9019\u985e\u5b58\u53d6\u5c01\u5305\u3002<\/p>\n<h3>\u4ec0\u9ebc\u662f\u5165\u53e3\u8a8d\u8b49\u9801\u9762\uff1f\u5b83\u6703\u5982\u4f55\u5f71\u97ff\u7db2\u7ad9\u5b58\u53d6\uff1f<\/h3>\n<p>\u5165\u53e3\u8a8d\u8b49\u9801\u9762\u6703\u6514\u622aHTTP\u8207HTTPS\u6d41\u91cf\uff0c\u4f7f\u7528\u8005\u5b58\u53d6\u7db2\u7ad9\u524d\u5fc5\u9808\u5b8c\u6210\u767b\u5165\u9a57\u8b49\u3002ping\u4e0d\u53d7\u5f71\u97ff\uff0c\u56e0\u70baICMP\u5c01\u5305\u53ef\u4ee5\u7e5e\u904e\u8a8d\u8b49\u9598\u9053\u5668\u3002\u516c\u5171Wi\u2011Fi\u5834\u666f\u4e0b\u7d93\u5e38\u51fa\u73fe\u8a72\u554f\u984c\uff0c\u5c6c\u65bc\u700f\u89bd\u5668\u5b58\u53d6\u6545\u969c\u7684\u5e38\u898b\u5834\u666f\u3002<\/p>\n<h3>ping\u6b63\u5e38\u7684\u60c5\u6cc1\u4e0b\uff0c\u5982\u4f55\u6e2c\u8a66HTTPS\u53ef\u9023\u901a\u6027\uff1f<\/h3>\n<p>\u57f7\u884c\u6307\u4ee4 <code>curl -I 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