{"id":33308,"date":"2026-06-12T13:52:42","date_gmt":"2026-06-12T05:52:42","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/what-to-do-when-the-server-cannot-connect-to-ssh\/"},"modified":"2026-06-12T14:00:00","modified_gmt":"2026-06-12T06:00:00","slug":"what-to-do-when-the-server-cannot-connect-to-ssh","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/blog\/what-to-do-when-the-server-cannot-connect-to-ssh\/","title":{"rendered":"\u5f53\u670d\u52a1\u5668\u65e0\u6cd5\u8fde\u63a5 SSH \u65f6\u8be5\u600e\u4e48\u529e"},"content":{"rendered":"<p>\u5f53\u4f60\u53d1\u73b0<a href=\"https:\/\/www.varidata.com\/zh-cn\/server\/tokyo\/\" target=\"_blank\">\u670d\u52a1\u5668<\/a>\u65e0\u6cd5\u901a\u8fc7 SSH \u8fde\u63a5\u65f6\uff0c\u96be\u514d\u4f1a\u611f\u5230\u6cae\u4e27\u6216\u62c5\u5fe7\u3002\u8bf7\u5148\u4fdd\u6301\u51b7\u9759\u3002\u4f60\u53ef\u4ee5\u6309\u7167\u660e\u786e\u7684\u6b65\u9aa4\u6765\u89e3\u51b3\u95ee\u9898\uff0c\u5e76\u4e14\u65e0\u9700\u5192\u7740\u6570\u636e\u98ce\u9669\u76f2\u76ee\u64cd\u4f5c\u3002\u8bf7\u8010\u5fc3\u9605\u8bfb\u672c\u6307\u5357\u3002\u4f60\u5c06\u5b66\u4f1a\u5982\u4f55\u5728\u4fdd\u969c<a href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/how-to-build-a-web-crawler-cluster-for-large-scale-data-scraping\/\" target=\"_blank\">\u6570\u636e\u5b89\u5168<\/a>\u7684\u524d\u63d0\u4e0b\u5904\u7406\u8fd9\u4e00\u95ee\u9898\u3002\u4e3a\u4e86\u83b7\u5f97\u6700\u4f73\u6548\u679c\uff0c\u8bf7\u6309\u987a\u5e8f\u9010\u6b65\u6392\u67e5\u3002<\/p>\n<h2>\u5f53\u670d\u52a1\u5668\u65e0\u6cd5\u8fde\u63a5\u65f6\u7684\u7d27\u6025\u5904\u7406\u63aa\u65bd<\/h2>\n<p>\u5f53\u4f60\u53d1\u73b0\u670d\u52a1\u5668\u65e0\u6cd5\u8fde\u63a5\u65f6\uff0c\u5e94\u5c3d\u5feb\u5148\u68c0\u67e5\u4e00\u4e9b\u57fa\u7840\u9879\u76ee\u3002\u8fd9\u4e9b\u521d\u6b65\u6b65\u9aa4\u53ef\u4ee5\u5e2e\u52a9\u4f60\u5728\u8fdb\u5165\u66f4\u6df1\u5165\u7684\u6545\u969c\u6392\u67e5\u4e4b\u524d\uff0c\u5148\u53d1\u73b0\u4e00\u4e9b\u7b80\u5355\u95ee\u9898\u3002<\/p>\n<h3>\u68c0\u67e5\u670d\u52a1\u5668\u72b6\u6001\u548c\u8fd0\u884c\u65f6\u95f4<\/h3>\n<p>\u9996\u5148\uff0c\u786e\u8ba4\u4f60\u7684\u670d\u52a1\u5668\u5b9e\u9645\u4e0a\u6b63\u5728\u8fd0\u884c\u3002\u8bb8\u591a\u670d\u52a1\u5546\u90fd\u4f1a\u63d0\u4f9b\u63a7\u5236\u9762\u677f\uff0c\u4f60\u53ef\u4ee5\u5728\u5176\u4e2d\u67e5\u770b\u670d\u52a1\u5668\u662f\u5426\u5728\u7ebf\u3002\u5982\u679c\u4f60\u770b\u5230\u670d\u52a1\u5668\u5df2\u505c\u6b62\u6216\u88ab\u6682\u505c\uff0c\u90a3\u4e48\u4f60\u5c06\u65e0\u6cd5\u8fde\u63a5\u3002\u6709\u4e9b\u670d\u52a1\u5546\u53ef\u80fd\u4f1a\u56e0\u6ee5\u7528\u884c\u4e3a\u6216\u8d26\u5355\u903e\u671f\u800c\u9501\u5b9a\u670d\u52a1\u5668\u3002\u8bf7\u67e5\u770b\u662f\u5426\u6709\u4efb\u4f55\u5173\u4e8e\u670d\u52a1\u5668\u72b6\u6001\u7684\u63d0\u9192\u6216\u8b66\u544a\u3002\u5982\u679c\u4f60\u770b\u5230\u201cconnection refused\uff08\u8fde\u63a5\u88ab\u62d2\u7edd\uff09\u201d\u4e4b\u7c7b\u7684\u4fe1\u606f\uff0c\u8bf4\u660e\u670d\u52a1\u5668\u53ef\u80fd\u6ca1\u6709\u63a5\u53d7\u8fde\u63a5\u8bf7\u6c42\u3002<\/p>\n<blockquote>\n<p><strong>\u63d0\u793a\uff1a<\/strong>\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f\u4e91\u670d\u52a1\u5668\u79df\u7528\uff0c\u8bf7\u68c0\u67e5\u5b9e\u4f8b\u72b6\u6001\u3002\u5b9e\u4f8b\u5904\u4e8e\u5df2\u505c\u6b62\u6216\u6b63\u5728\u91cd\u542f\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4 connection timeout\uff08\u8fde\u63a5\u8d85\u65f6\uff09\u3002<\/p>\n<\/blockquote>\n<h3>\u67e5\u770b\u670d\u52a1\u5668\u79df\u7528\u63a7\u5236\u9762\u677f\u4e2d\u7684\u544a\u8b66\u4fe1\u606f<\/h3>\n<p>\u63a5\u4e0b\u6765\uff0c\u767b\u5f55\u4f60\u7684\u670d\u52a1\u5668\u79df\u7528\u63a7\u5236\u9762\u677f\uff0c\u67e5\u770b\u5176\u4e2d\u7684\u544a\u8b66\u6216\u901a\u77e5\u3002\u8fd9\u4e9b\u4fe1\u606f\u53ef\u80fd\u4f1a\u63d0\u793a\u4f60\u662f\u5426\u5b58\u5728\u6ee5\u7528\u9501\u5b9a\u3001\u7ef4\u62a4\u6216\u7f51\u7edc\u95ee\u9898\u3002\u5982\u679c\u4f60\u770b\u5230 authentication failed\uff08\u8eab\u4efd\u9a8c\u8bc1\u5931\u8d25\uff09\u7684\u63d0\u793a\uff0c\u8bf7\u518d\u6b21\u786e\u8ba4\u4f60\u7684\u7528\u6237\u540d\u3001\u79c1\u94a5\u8def\u5f84\u4ee5\u53ca\u53e3\u4ee4\u77ed\u8bed\u662f\u5426\u6b63\u786e\u3002\u6709\u4e9b\u63a7\u5236\u9762\u677f\u4f1a\u663e\u793a\u670d\u52a1\u5668 unable to ssh\uff08\u65e0\u6cd5 SSH \u767b\u5f55\uff09\u662f\u5426\u662f\u7531\u4e8e\u9632\u706b\u5899\u89c4\u5219\u6216\u7aef\u53e3\u88ab\u963b\u6b62\u6240\u5bfc\u81f4\u3002\u5982\u679c\u4f60\u770b\u5230 connection timeout\uff08\u8fde\u63a5\u8d85\u65f6\uff09\uff0c\u8bf7\u68c0\u67e5\u6b63\u786e\u7684\u7aef\u53e3\u662f\u5426\u5df2\u5f00\u653e\u3002<\/p>\n<p><strong>\u4f60\u53ef\u80fd\u4f1a\u770b\u5230\u7684\u5e38\u89c1\u544a\u8b66\uff1a<\/strong><\/p>\n<ol>\n<li>\n<p>Authentication failed\uff08\u8eab\u4efd\u9a8c\u8bc1\u5931\u8d25\uff09\u2014\u2014\u68c0\u67e5\u4f60\u7684\u767b\u5f55\u4fe1\u606f\u3002<\/p>\n<\/li>\n<li>\n<p>Passphrase required\uff08\u9700\u8981\u53e3\u4ee4\u77ed\u8bed\uff09\u2014\u2014\u8f93\u5165\u4f60\u7684 SSH \u53e3\u4ee4\u77ed\u8bed\u3002<\/p>\n<\/li>\n<li>\n<p>Connection timed out\uff08\u8fde\u63a5\u8d85\u65f6\uff09\u2014\u2014\u68c0\u67e5\u4f60\u7684\u9632\u706b\u5899\u548c\u7aef\u53e3\u8bbe\u7f6e\u3002<\/p>\n<\/li>\n<\/ol>\n<h3>\u786e\u8ba4\u7f51\u7edc\u548c IP \u5730\u5740<\/h3>\n<p>\u4f60\u9700\u8981\u786e\u4fdd\u81ea\u5df1\u4f7f\u7528\u7684\u662f\u6b63\u786e\u7684 IP \u5730\u5740\u6216\u4e3b\u673a\u540d\u3002\u4e00\u4e2a\u5f88\u5c0f\u7684\u62fc\u5199\u9519\u8bef\u90fd\u53ef\u80fd\u5bfc\u81f4\u8fde\u63a5\u5931\u8d25\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528 ping \u547d\u4ee4\u68c0\u67e5\u4e3b\u673a\u540d\u662f\u5426\u80fd\u591f\u6b63\u786e\u89e3\u6790\u3002\u5982\u679c ping \u5931\u8d25\uff0c\u53ef\u5c1d\u8bd5\u4f7f\u7528\u7b2c\u4e09\u65b9 DNS \u68c0\u67e5\u5de5\u5177\u6765\u786e\u8ba4\u4e3b\u673a\u540d\u662f\u5426\u6b63\u786e\u3002\u59cb\u7ec8\u4f7f\u7528\u670d\u52a1\u5546\u63d0\u4f9b\u7684 IP \u5730\u5740\u6216\u4e3b\u673a\u540d\u3002\u5982\u679c\u4f7f\u7528\u9519\u8bef\uff0c\u5c31\u53ef\u80fd\u4f1a\u770b\u5230\u5982 connection refused\uff08\u8fde\u63a5\u88ab\u62d2\u7edd\uff09\u4e4b\u7c7b\u7684\u9519\u8bef\u3002<\/p>\n<ul>\n<li>\n<p>\u4e3b\u673a\u540d\u62fc\u5199\u9519\u8bef\u4f1a\u5bfc\u81f4\u65e0\u6cd5\u8bbf\u95ee\u3002<\/p>\n<\/li>\n<li>\n<p>Ping \u53ef\u4ee5\u5e2e\u52a9\u4f60\u6d4b\u8bd5\u670d\u52a1\u5668\u662f\u5426\u6709\u54cd\u5e94\u3002<\/p>\n<\/li>\n<li>\n<p>DNS \u68c0\u67e5\u5de5\u5177\u53ef\u4ee5\u786e\u8ba4\u4e3b\u673a\u540d\u662f\u5426\u6709\u6548\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u6267\u884c\u8fd9\u4e9b\u7d27\u6025\u5904\u7406\u6b65\u9aa4\uff0c\u4f60\u901a\u5e38\u53ef\u4ee5\u8f83\u5feb\u627e\u51fa\u4e3a\u4ec0\u4e48\u65e0\u6cd5\u901a\u8fc7 SSH \u767b\u5f55\u670d\u52a1\u5668\u3002\u8fd9\u4e9b\u68c0\u67e5\u53ef\u4ee5\u8282\u7701\u65f6\u95f4\uff0c\u4e5f\u80fd\u5e2e\u52a9\u4f60\u907f\u514d\u8fc7\u65e9\u8fdb\u5165\u66f4\u590d\u6742\u7684\u6392\u969c\u6d41\u7a0b\u3002<\/p>\n<h2>\u6392\u67e5 SSH \u8fde\u63a5\u95ee\u9898<\/h2>\n<p>\u5f53\u4f60\u7684\u670d\u52a1\u5668\u65e0\u6cd5\u901a\u8fc7 SSH \u8fde\u63a5\u65f6\uff0c\u4f60\u9700\u8981\u627e\u51fa\u95ee\u9898\u7a76\u7adf\u4ece\u54ea\u91cc\u5f00\u59cb\u3002\u4f60\u53ef\u4ee5\u68c0\u67e5\u95ee\u9898\u662f\u6765\u81ea DNS\u3001\u7f51\u7edc\uff0c\u8fd8\u662f\u5ba2\u6237\u7aef\u8bbe\u7f6e\u3002\u8bf7\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u6392\u67e5 SSH \u8fde\u63a5\u95ee\u9898\u5e76\u4fee\u590d\u76f8\u5173\u6545\u969c\u3002<\/p>\n<h3>\u6d4b\u8bd5\u4e3b\u673a\u540d\u89e3\u6790<\/h3>\n<p>\u9996\u5148\u68c0\u67e5\u4f60\u7684\u7535\u8111\u662f\u5426\u80fd\u591f\u89e3\u6790\u670d\u52a1\u5668\u4e3b\u673a\u540d\u3002\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f\u4e3b\u673a\u540d\u800c\u4e0d\u662f IP \u5730\u5740\uff0c\u90a3\u4e48\u4f60\u7684\u7cfb\u7edf\u5fc5\u987b\u5148\u5c06\u5176\u8f6c\u6362\u4e3a\u6b63\u786e\u7684 IP\u3002\u6709\u65f6\uff0cDNS \u95ee\u9898\u4f1a\u5bfc\u81f4 connection timeout\uff08\u8fde\u63a5\u8d85\u65f6\uff09\u6216 connection refused\uff08\u8fde\u63a5\u88ab\u62d2\u7edd\uff09\u3002<\/p>\n<ul>\n<li>\n<p>\u786e\u4fdd\u4f60\u5df2\u7ecf\u4e3a\u7ba1\u7406\u63a5\u53e3\u548c\u6570\u636e\u63a5\u53e3\u90fd\u914d\u7f6e\u4e86 DNS \u670d\u52a1\u5668\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u4f60\u4f7f\u7528\u8bca\u65ad\u63a5\u53e3\u8fdb\u884c\u67e5\u8be2\uff0c\u8bf7\u786e\u8ba4\u8be5\u63a5\u53e3\u5df2\u7ecf\u5206\u914d\u4e86 IP \u5730\u5740\u3002<\/p>\n<\/li>\n<li>\n<p>\u5c1d\u8bd5 ping \u6bcf\u4e00\u4e2a DNS \u670d\u52a1\u5668\u7684 IP \u5730\u5740\uff0c\u67e5\u770b\u5b83\u4eec\u662f\u5426\u54cd\u5e94\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c ping \u6b63\u5e38\u4f46\u540d\u79f0\u89e3\u6790\u5931\u8d25\uff0c\u8bf7\u68c0\u67e5\u4f60\u7684\u8bbf\u95ee\u63a7\u5236\u89c4\u5219\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c ping \u6b63\u5e38\u3001\u8def\u7531\u6b63\u786e\u4e14\u8bbf\u95ee\u63a7\u5236\u4e5f\u6ca1\u6709\u95ee\u9898\uff0c\u90a3\u4e48 DNS \u670d\u52a1\u5668\u53ef\u80fd\u5e76\u672a\u4fdd\u5b58\u8be5\u5b8c\u6574\u4e3b\u673a\u540d\u7684\u6620\u5c04\u8bb0\u5f55\u3002<\/p>\n<\/li>\n<\/ul>\n<blockquote>\n<p><strong>\u8bf4\u660e\uff1a<\/strong>\u5982\u679c\u4f60\u80fd\u89e3\u6790\u51fa\u540d\u79f0\uff0c\u4f46\u5f97\u5230\u7684 IP \u5730\u5740\u5e76\u4e0d\u662f\u6700\u65b0\u7684\uff0c\u90a3\u4e48\u7cfb\u7edf\u53ef\u80fd\u6b63\u5728\u4f7f\u7528\u7f13\u5b58\u7684 DNS \u8bb0\u5f55\u3002\u8fd9\u4f1a\u5bfc\u81f4\u663e\u793a\u8fc7\u671f IP \u5730\u5740\uff0c\u4ece\u800c\u9020\u6210\u8fde\u63a5\u5931\u8d25\u3002<\/p>\n<\/blockquote>\n<h3>\u4f7f\u7528 Ping \u548c Telnet \u8fdb\u884c\u7f51\u7edc\u68c0\u67e5<\/h3>\n<p>\u4f60\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e9b\u7b80\u5355\u7684\u7f51\u7edc\u5de5\u5177\u6765\u6d4b\u8bd5\u4f60\u7684\u7535\u8111\u80fd\u5426\u8bbf\u95ee\u670d\u52a1\u5668\u3002ping \u547d\u4ee4\u7528\u4e8e\u68c0\u67e5\u670d\u52a1\u5668\u662f\u5426\u54cd\u5e94\u7f51\u7edc\u8bf7\u6c42\uff1btelnet \u547d\u4ee4\u5219\u7528\u4e8e\u6d4b\u8bd5 SSH \u7aef\u53e3\u662f\u5426\u5f00\u653e\u5e76\u63a5\u53d7\u8fde\u63a5\u3002<\/p>\n<ul>\n<li>\n<p>\u4f7f\u7528 <code>ping &lt;hostname or IP&gt;<\/code> \u67e5\u770b\u670d\u52a1\u5668\u662f\u5426\u54cd\u5e94\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c ping \u5931\u8d25\uff0c\u53ef\u80fd\u662f\u7f51\u7edc\u95ee\u9898\uff0c\u4e5f\u53ef\u80fd\u662f\u670d\u52a1\u5668\u79bb\u7ebf\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528 <code>telnet &lt;hostname or IP&gt; 22<\/code> \u68c0\u67e5\u7aef\u53e3\u662f\u5426\u5f00\u653e\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c telnet \u65e0\u6cd5\u8fde\u63a5\uff0c\u53ef\u80fd\u662f\u9632\u706b\u5899\u963b\u6b62\u4e86\u8be5\u7aef\u53e3\uff0c\u6216\u8005 SSH \u670d\u52a1\u6ca1\u6709\u8fd0\u884c\u3002<\/p>\n<\/li>\n<\/ul>\n<blockquote>\n<p><strong>\u63d0\u793a\uff1a<\/strong>\u5982\u679c ping \u6b63\u5e38\u4f46 telnet \u5931\u8d25\uff0c\u8bf7\u91cd\u70b9\u68c0\u67e5\u9632\u706b\u5899\u89c4\u5219\u6216 SSH \u670d\u52a1\u72b6\u6001\u3002<\/p>\n<\/blockquote>\n<h3>\u5206\u6790 SSH \u5ba2\u6237\u7aef\u65e5\u5fd7<\/h3>\n<p>\u4f60\u7684 SSH \u5ba2\u6237\u7aef\u4f1a\u7ed9\u51fa\u8fde\u63a5\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u95ee\u9898\u7684\u7ebf\u7d22\u3002\u4f60\u53ef\u4ee5\u542f\u7528\u8be6\u7ec6\u6a21\u5f0f\u6765\u67e5\u770b\u66f4\u5177\u4f53\u7684\u9519\u8bef\u4fe1\u606f\u3002\u8fd9\u6709\u52a9\u4e8e\u5224\u65ad\u95ee\u9898\u51fa\u5728\u8eab\u4efd\u9a8c\u8bc1\u3001\u7f51\u7edc\u8fd8\u662f\u914d\u7f6e\u65b9\u9762\u3002<\/p>\n<ul>\n<li>\n<p>\u8fd0\u884c <code>ssh -v user@hostname<\/code> \u4ee5\u83b7\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n<\/li>\n<li>\n<p>\u67e5\u627e\u8bf8\u5982 connection refused\uff08\u8fde\u63a5\u88ab\u62d2\u7edd\uff09\u3001connection timeout\uff08\u8fde\u63a5\u8d85\u65f6\uff09\u6216 authentication failed\uff08\u8eab\u4efd\u9a8c\u8bc1\u5931\u8d25\uff09\u4e4b\u7c7b\u7684\u4fe1\u606f\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u770b\u5230 connection refused\uff08\u8fde\u63a5\u88ab\u62d2\u7edd\uff09\uff0c\u8bf4\u660e\u670d\u52a1\u5668\u53ef\u80fd\u6ca1\u6709\u8fd0\u884c SSH \u670d\u52a1\uff0c\u6216\u8005\u9632\u706b\u5899\u963b\u6b62\u4e86\u7aef\u53e3\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u770b\u5230 connection timeout\uff08\u8fde\u63a5\u8d85\u65f6\uff09\uff0c\u8bf4\u660e\u53ef\u80fd\u662f\u7f51\u7edc\u963b\u65ad\u4e86\u8fde\u63a5\uff0c\u6216\u8005\u670d\u52a1\u5668\u5df2\u5b95\u673a\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u770b\u5230 authentication failed\uff08\u8eab\u4efd\u9a8c\u8bc1\u5931\u8d25\uff09\uff0c\u8bf7\u68c0\u67e5\u7528\u6237\u540d\u3001\u5bc6\u7801\u6216\u5bc6\u94a5\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u8fd9\u4e9b\u6b65\u9aa4\uff0c\u4f60\u53ef\u4ee5\u9010\u6b65\u7f29\u5c0f SSH \u8fde\u63a5\u95ee\u9898\u7684\u8303\u56f4\u3002\u4f60\u5c06\u5224\u65ad\u95ee\u9898\u7a76\u7adf\u6765\u81ea DNS\u3001\u7f51\u7edc\u8fd8\u662f\u5ba2\u6237\u7aef\u914d\u7f6e\u3002\u8fd9\u79cd\u65b9\u5f0f\u80fd\u8282\u7701\u65f6\u95f4\uff0c\u5e76\u5e2e\u52a9\u4f60\u66f4\u5feb\u4fee\u590d\u95ee\u9898\u3002<\/p>\n<h2>\u4fee\u590d\u5e38\u89c1 SSH \u95ee\u9898<\/h2>\n<p>\u5f53\u4f60\u53d1\u73b0\u670d\u52a1\u5668\u65e0\u6cd5\u8fde\u63a5\u65f6\uff0c\u9700\u8981\u68c0\u67e5\u4e00\u4e9b\u6700\u5e38\u89c1\u7684\u3001\u4f1a\u963b\u6b62 SSH \u8bbf\u95ee\u7684\u95ee\u9898\u3002\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\uff0c\u8bb8\u591a\u95ee\u9898\u90fd\u53ef\u4ee5\u5f97\u5230\u89e3\u51b3\u3002<\/p>\n<h3>\u68c0\u67e5 SSH \u670d\u52a1\u72b6\u6001<\/h3>\n<p>\u9996\u5148\u4f60\u5e94\u786e\u8ba4\u670d\u52a1\u5668\u4e0a\u7684 SSH \u670d\u52a1\u662f\u5426\u6b63\u5728\u8fd0\u884c\u3002\u5982\u679c\u670d\u52a1\u5df2\u505c\u6b62\u6216\u5d29\u6e83\uff0c\u4f60\u5c06\u65e0\u6cd5\u8fde\u63a5\u3002\u8bf7\u767b\u5f55\u4f60\u7684\u670d\u52a1\u5668\u79df\u7528\u63a7\u5236\u9762\u677f\uff0c\u6216\u8005\u4f7f\u7528\u53ef\u7528\u7684\u63a7\u5236\u53f0\u8fdb\u884c\u64cd\u4f5c\u3002\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\u68c0\u67e5\u670d\u52a1\u72b6\u6001\uff1a<\/p>\n<pre><code>sudo systemctl status ssh<\/code><\/pre>\n<p>\u5982\u679c\u670d\u52a1\u672a\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\uff0c\u53ef\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u542f\u52a8\uff1a<\/p>\n<pre><code>sudo systemctl start ssh<\/code><\/pre>\n<p>\u5982\u679c\u670d\u52a1\u672a\u8fd0\u884c\uff0c\u4f60\u53ef\u80fd\u4f1a\u770b\u5230 connection refused\uff08\u8fde\u63a5\u88ab\u62d2\u7edd\uff09\u6216 connection timeout\uff08\u8fde\u63a5\u8d85\u65f6\uff09\u7b49\u9519\u8bef\u3002\u4e0b\u8868\u5217\u51fa\u4e86\u5e38\u89c1\u9519\u8bef\u53ca\u5176\u542b\u4e49\uff1a<\/p>\n<div class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 50px\">\n<colgroup>\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\">\n    <\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u9519\u8bef\u7c7b\u578b<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u8bf4\u660e<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e3b\u673a\u540d\u89e3\u6790<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5f53 SSH \u4e3b\u673a\u65e0\u6cd5\u6620\u5c04\u5230\u7f51\u7edc\u5730\u5740\u65f6\u4f1a\u51fa\u73b0\u6b64\u7c7b\u9519\u8bef\uff0c\u901a\u5e38\u4e0e DNS \u95ee\u9898\u6709\u5173\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8fde\u63a5\u8d85\u65f6<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5ba2\u6237\u7aef\u5728\u8d85\u65f6\u65f6\u95f4\u5185\u672a\u6536\u5230\u670d\u52a1\u5668\u54cd\u5e94\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8fde\u63a5\u88ab\u62d2\u7edd<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8fde\u63a5\u8bf7\u6c42\u5df2\u7ecf\u5230\u8fbe SSH \u4e3b\u673a\uff0c\u4f46\u4e3b\u673a\u672a\u63a5\u53d7\u8be5\u8fde\u63a5\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<blockquote>\n<p><strong>\u63d0\u793a\uff1a<\/strong>\u5982\u679c\u4f60\u91cd\u542f SSH \u670d\u52a1\u540e\u4ecd\u7136\u65e0\u6cd5\u8fde\u63a5\uff0c\u8bf7\u68c0\u67e5\u65e5\u5fd7\u4ee5\u83b7\u53d6\u66f4\u591a\u7ec6\u8282\u3002\u4f7f\u7528 <code>journalctl -u ssh<\/code> \u67e5\u770b\u6700\u8fd1\u7684\u65e5\u5fd7\u4fe1\u606f\u3002<\/p>\n<\/blockquote>\n<h3>\u68c0\u67e5\u9632\u706b\u5899\u548c\u7aef\u53e3\u8bbe\u7f6e<\/h3>\n<p>\u9632\u706b\u5899\u53ef\u4ee5\u4fdd\u62a4\u4f60\u7684\u670d\u52a1\u5668\uff0c\u4f46\u5982\u679c\u914d\u7f6e\u4e0d\u6b63\u786e\uff0c\u4e5f\u4f1a\u963b\u6b62 SSH\u3002\u4f60\u9700\u8981\u786e\u4fdd 22 \u7aef\u53e3\u5df2\u7ecf\u5f00\u653e\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u68c0\u67e5\u9632\u706b\u5899\u89c4\u5219\uff1a<\/p>\n<pre><code>sudo iptables -L -n<\/code><\/pre>\n<p>\u6216\u8005\uff0c\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f firewalld\uff1a<\/p>\n<pre><code>sudo firewall-cmd --list-all<\/code><\/pre>\n<p>\u68c0\u67e5\u662f\u5426\u5b58\u5728\u5141\u8bb8 22 \u7aef\u53e3\u6d41\u91cf\u901a\u8fc7\u7684\u89c4\u5219\u3002\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f\u5176\u4ed6\u7aef\u53e3\uff0c\u8bf7\u68c0\u67e5\u5bf9\u5e94\u7aef\u53e3\u3002\u5982\u679c\u4f60\u770b\u5230 connection timeout\uff08\u8fde\u63a5\u8d85\u65f6\uff09\uff0c\u8bf4\u660e\u9632\u706b\u5899\u53ef\u80fd\u963b\u6b62\u4e86\u8be5\u7aef\u53e3\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6dfb\u52a0\u4e00\u6761\u5141\u8bb8 SSH \u7684\u89c4\u5219\uff1a<\/p>\n<pre><code>sudo iptables -A INPUT -p tcp --dport 22 -j ACCEPT<\/code><\/pre>\n<blockquote>\n<p><strong>\u8bf4\u660e\uff1a<\/strong>\u4e00\u4e9b\u4e91\u670d\u52a1\u5546\u5728\u63a7\u5236\u9762\u677f\u4e2d\u8fd8\u63d0\u4f9b\u72ec\u7acb\u7684\u9632\u706b\u5899\u8bbe\u7f6e\u3002\u8bf7\u52a1\u5fc5\u540c\u65f6\u68c0\u67e5\u670d\u52a1\u5668\u672c\u5730\u9632\u706b\u5899\u548c\u670d\u52a1\u5546\u4fa7\u9632\u706b\u5899\u3002<\/p>\n<\/blockquote>\n<h3>\u68c0\u67e5 SSH \u914d\u7f6e\u6587\u4ef6<\/h3>\n<p>SSH \u914d\u7f6e\u6587\u4ef6\u51b3\u5b9a\u4e86\u670d\u52a1\u7684\u8fd0\u884c\u65b9\u5f0f\u3002\u8fd9\u4e2a\u6587\u4ef6\u4e2d\u7684\u9519\u8bef\u914d\u7f6e\u53ef\u80fd\u5bfc\u81f4\u4f60\u65e0\u6cd5\u8fde\u63a5\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6253\u5f00\u914d\u7f6e\u6587\u4ef6\uff1a<\/p>\n<pre><code>sudo nano \/etc\/ssh\/sshd_config<\/code><\/pre>\n<p>\u8bf7\u68c0\u67e5\u4ee5\u4e0b\u5e38\u89c1\u95ee\u9898\uff1a<\/p>\n<ul>\n<li>\n<p><code>Port 22<\/code> \u8fd9\u4e00\u884c\u5e94\u4e0e\u4f60\u5b9e\u9645\u4f7f\u7528\u7684\u7aef\u53e3\u4e00\u81f4\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u4f60\u5e0c\u671b\u5141\u8bb8 root \u767b\u5f55\uff0c<code>PermitRootLogin<\/code> \u5e94\u8bbe\u7f6e\u4e3a <code>yes<\/code> \u6216 <code>prohibit-password<\/code>\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u4f60\u4f7f\u7528\u5bc6\u7801\u767b\u5f55\uff0c<code>PasswordAuthentication<\/code> \u5e94\u8bbe\u7f6e\u4e3a <code>yes<\/code>\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u4fee\u6539\u5b8c\u6210\u540e\uff0c\u91cd\u542f\u670d\u52a1\uff1a<\/p>\n<pre><code>sudo systemctl restart ssh<\/code><\/pre>\n<blockquote>\n<p><strong>\u63d0\u9192\uff1a<\/strong>\u5728\u4fee\u6539\u914d\u7f6e\u6587\u4ef6\u4e4b\u524d\uff0c\u8bf7\u52a1\u5fc5\u5148\u505a\u597d\u5907\u4efd\u3002\u9519\u8bef\u7684\u8bbe\u7f6e\u53ef\u80fd\u4f1a\u628a\u4f60\u81ea\u5df1\u9501\u5728\u670d\u52a1\u5668\u4e4b\u5916\u3002<\/p>\n<\/blockquote>\n<h3>\u8bc6\u522b\u6700\u8fd1\u7684\u53d8\u66f4<\/h3>\n<p>\u8bf7\u56de\u60f3\u4e00\u4e0b\uff0c\u5728\u95ee\u9898\u51fa\u73b0\u4e4b\u524d\u4f60\u505a\u8fc7\u54ea\u4e9b\u66f4\u6539\u3002\u8fd1\u671f\u7684\u66f4\u65b0\u6216\u914d\u7f6e\u8c03\u6574\u5f88\u53ef\u80fd\u4f1a\u7834\u574f SSH \u8bbf\u95ee\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u53ef\u80fd\u5f71\u54cd SSH \u7684\u53d8\u66f4\uff1a<\/p>\n<ul>\n<li>\n<p>\u5e26\u5bbd\u9650\u5236\u53ef\u80fd\u4f1a\u62d6\u6162\u6587\u4ef6\u4f20\u8f93\u901f\u5ea6\uff0c\u8ba9\u4f60\u8bef\u4ee5\u4e3a\u670d\u52a1\u5668\u65e0\u54cd\u5e94\u3002<\/p>\n<\/li>\n<li>\n<p>\u66f4\u6539\u865a\u62df\u6587\u4ef6\u7cfb\u7edf\u53ef\u80fd\u4f1a\u6539\u53d8\u76ee\u5f55\u8def\u5f84\uff0c\u4ece\u800c\u963b\u788d\u8bbf\u95ee\u3002<\/p>\n<\/li>\n<li>\n<p>\u5347\u7ea7\u6216\u964d\u7ea7\u53ef\u80fd\u4f1a\u9020\u6210\u7248\u672c\u4e0d\u517c\u5bb9\u3002<\/p>\n<\/li>\n<li>\n<p>\u5207\u6362\u5230 IPv6 \u4f46\u672a\u6b63\u786e\u914d\u7f6e\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8d85\u65f6\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u4f60\u8fd8\u5e94\u68c0\u67e5\u4ee5\u4e0b\u5177\u4f53\u8981\u6c42\uff1a<\/p>\n<ol>\n<li>\n<p>\u8fdc\u7a0b\u8bbf\u95ee\u9700\u8981\u4f7f\u7528 SSH Version 2\u3002\u4f7f\u7528\u65e7\u7248\u672c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8fde\u63a5\u5931\u8d25\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u4f60\u4ece IPv6 \u7f51\u7edc\u8fde\u63a5\uff0c\u5fc5\u987b\u8bbe\u7f6e\u6b63\u786e\u7684\u9009\u9879\u4ee5\u907f\u514d\u8d85\u65f6\u3002<\/p>\n<\/li>\n<\/ol>\n<blockquote>\n<p><strong>\u8b66\u793a\uff1a<\/strong>\u52a1\u5fc5\u4fdd\u7559\u4f60\u6240\u505a\u53d8\u66f4\u7684\u8bb0\u5f55\u3002\u8fd9\u6837\u5728 SSH \u505c\u6b62\u5de5\u4f5c\u65f6\uff0c\u4f60\u80fd\u66f4\u5feb\u627e\u5230\u539f\u56e0\u3002<\/p>\n<\/blockquote>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u4f60\u53ef\u4ee5\u4fee\u590d\u8bb8\u591a\u5e38\u89c1\u95ee\u9898\uff0c\u4e5f\u80fd\u66f4\u6e05\u695a\u5730\u7406\u89e3\u4e3a\u4ec0\u4e48\u670d\u52a1\u5668\u65e0\u6cd5\u8fde\u63a5\uff0c\u4ee5\u53ca\u5982\u4f55\u6062\u590d\u8bbf\u95ee\u3002<\/p>\n<h2>\u65e0\u6cd5 SSH \u767b\u5f55\u65f6\u7684\u6062\u590d\u65b9\u6848<\/h2>\n<p>\u5f53\u4f60\u65e0\u6cd5\u901a\u8fc7 SSH \u767b\u5f55\u670d\u52a1\u5668\u65f6\uff0c\u9700\u8981\u5c3d\u5feb\u91c7\u53d6\u63aa\u65bd\u6765\u6062\u590d\u8bbf\u95ee\u6743\u9650\u3002\u4f60\u6709\u591a\u79cd\u6062\u590d\u65b9\u5f0f\u53ef\u4f9b\u9009\u62e9\uff0c\u5b83\u4eec\u53ef\u4ee5\u5e2e\u52a9\u4f60\u91cd\u65b0\u53d6\u5f97\u63a7\u5236\u6743\uff0c\u5e76\u907f\u514d\u6570\u636e\u4e22\u5931\u3002<\/p>\n<h3>\u901a\u8fc7\u63a7\u5236\u53f0\u6216\u5b89\u5168\u6a21\u5f0f\u8bbf\u95ee<\/h3>\n<p>\u5927\u591a\u6570\u670d\u52a1\u5546\u90fd\u4f1a\u63d0\u4f9b\u57fa\u4e8e\u7f51\u9875\u7684\u63a7\u5236\u53f0\u6216\u5b89\u5168\u6a21\u5f0f\u8bbf\u95ee\u65b9\u5f0f\u3002\u5373\u4f7f\u670d\u52a1\u5668\u65e0\u6cd5\u901a\u8fc7\u5e38\u89c4\u65b9\u5f0f\u8fde\u63a5\uff0c\u4f60\u4ecd\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u5de5\u5177\u767b\u5f55\u3002\u63a7\u5236\u53f0\u5141\u8bb8\u4f60\u76f4\u63a5\u5728\u670d\u52a1\u5668\u4e0a\u6392\u67e5\u95ee\u9898\u3002\u5b89\u5168\u6a21\u5f0f\u901a\u5e38\u53ea\u52a0\u8f7d\u6700\u5c11\u7684\u670d\u52a1\uff0c\u8fd9\u6709\u52a9\u4e8e\u4f60\u4fee\u590d\u914d\u7f6e\u9519\u8bef\u6216\u91cd\u542f\u670d\u52a1\u3002<\/p>\n<blockquote>\n<p><strong>\u63d0\u793a\uff1a<\/strong>\u5982\u679c\u4f60\u7684\u670d\u52a1\u5546\u63d0\u4f9b\u6551\u63f4\u6a21\u5f0f\uff08rescue mode\uff09\uff0c\u53ef\u4f7f\u7528\u5b83\u6302\u8f7d\u78c1\u76d8\u5e76\u4fee\u590d\u6587\u4ef6\uff0c\u800c\u65e0\u9700\u542f\u52a8\u5b8c\u6574\u7cfb\u7edf\u3002<\/p>\n<\/blockquote>\n<h3>\u91cd\u7f6e Root \u5bc6\u7801\u6216 SSH \u5bc6\u94a5<\/h3>\n<p>\u5982\u679c\u4f60\u6000\u7591\u662f\u5bc6\u7801\u6216\u5bc6\u94a5\u51fa\u4e86\u95ee\u9898\uff0c\u53ef\u4ee5\u91cd\u7f6e root \u5bc6\u7801\u6216\u751f\u6210\u65b0\u7684\u5bc6\u94a5\u3002\u8bb8\u591a\u63a7\u5236\u9762\u677f\u90fd\u63d0\u4f9b\u5bc6\u7801\u91cd\u7f6e\u5de5\u5177\u3002\u4f60\u4e5f\u53ef\u4ee5\u5728\u65e7\u5bc6\u94a5\u5931\u6548\u65f6\u4e0a\u4f20\u65b0\u7684\u516c\u94a5\u3002\u8fd9\u4e00\u6b65\u6709\u52a9\u4e8e\u7ed5\u8fc7\u8eab\u4efd\u9a8c\u8bc1\u9519\u8bef\u5e76\u6062\u590d\u8bbf\u95ee\u3002<\/p>\n<p><strong>\u91cd\u7f6e SSH \u5bc6\u94a5\u7684\u6b65\u9aa4\uff1a<\/strong><\/p>\n<ol>\n<li>\n<p>\u767b\u5f55\u5230\u4f60\u7684\u63a7\u5236\u9762\u677f\u3002<\/p>\n<\/li>\n<li>\n<p>\u627e\u5230\u5bc6\u94a5\u7ba1\u7406\u76f8\u5173\u533a\u57df\u3002<\/p>\n<\/li>\n<li>\n<p>\u4e0a\u4f20\u65b0\u7684\u516c\u94a5\uff0c\u6216\u91cd\u7f6e root \u5bc6\u7801\u3002<\/p>\n<\/li>\n<li>\n<p>\u91cd\u542f\u670d\u52a1\u3002<\/p>\n<\/li>\n<\/ol>\n<h3>\u4ece\u5907\u4efd\u4e2d\u6062\u590d<\/h3>\n<p>\u5982\u679c SSH \u6545\u969c\u6392\u67e5\u6ca1\u6709\u6548\u679c\uff0c\u4f60\u53ef\u80fd\u9700\u8981\u4ece\u5907\u4efd\u4e2d\u6062\u590d\u670d\u52a1\u5668\u3002\u5907\u4efd\u53ef\u4ee5\u4fdd\u62a4\u4f60\u7684\u6570\u636e\uff0c\u5e76\u5e2e\u52a9\u4f60\u4ece\u91cd\u5927\u9519\u8bef\u4e2d\u6062\u590d\u3002\u8bf7\u9009\u62e9\u6700\u8fd1\u4e14\u6ca1\u6709\u8be5\u95ee\u9898\u7684\u5907\u4efd\u3002\u4f60\u53ef\u4ee5\u6062\u590d\u6587\u4ef6\u3001\u914d\u7f6e\uff0c\u751a\u81f3\u6574\u4e2a\u670d\u52a1\u5668\u3002<\/p>\n<blockquote>\n<p><strong>\u8b66\u793a\uff1a<\/strong>\u6062\u590d\u4e4b\u524d\u52a1\u5fc5\u5148\u68c0\u67e5\u5907\u4efd\u5185\u5bb9\uff0c\u786e\u4fdd\u5176\u4e2d\u5305\u542b\u6240\u6709\u91cd\u8981\u6570\u636e\u3002<\/p>\n<\/blockquote>\n<h3>\u643a\u5e26\u8bca\u65ad\u4fe1\u606f\u8054\u7cfb\u6280\u672f\u652f\u6301<\/h3>\n<p>\u5982\u679c\u4f60\u65e0\u6cd5\u81ea\u884c\u89e3\u51b3\u95ee\u9898\uff0c\u8bf7\u8054\u7cfb\u4f60\u7684\u670d\u52a1\u5668\u79df\u7528\u670d\u52a1\u5546\u6280\u672f\u652f\u6301\u56e2\u961f\u3002\u8bf7\u63d0\u524d\u51c6\u5907\u597d\u8bca\u65ad\u4fe1\u606f\uff0c\u4f8b\u5982\u9519\u8bef\u6d88\u606f\u3001\u65e5\u5fd7\u4ee5\u53ca\u4f60\u5df2\u7ecf\u5c1d\u8bd5\u8fc7\u7684\u6b65\u9aa4\u3002\u6280\u672f\u652f\u6301\u56e2\u961f\u53ef\u4ee5\u5e2e\u52a9\u4f60\u8fdb\u4e00\u6b65\u6392\u67e5\u95ee\u9898\uff0c\u5e76\u6307\u5bfc\u4f60\u5b8c\u6210\u6062\u590d\u3002<\/p>\n<p><strong>\u5efa\u8bae\u63d0\u4f9b\u7684\u4fe1\u606f\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p>SSH \u5ba2\u6237\u7aef\u65e5\u5fd7<\/p>\n<\/li>\n<li>\n<p>\u670d\u52a1\u5668\u72b6\u6001\u62a5\u544a<\/p>\n<\/li>\n<li>\n<p>\u9632\u706b\u5899\u8bbe\u7f6e<\/p>\n<\/li>\n<li>\n<p>\u6700\u8fd1\u7684\u53d8\u66f4<\/p>\n<\/li>\n<\/ul>\n<p>\u5f53\u670d\u52a1\u5668\u65e0\u6cd5\u8fde\u63a5\u65f6\uff0c\u901a\u8fc7\u4ee5\u4e0a\u8fd9\u4e9b\u6062\u590d\u65b9\u6848\uff0c\u4f60\u901a\u5e38\u80fd\u591f\u89e3\u51b3\u5927\u591a\u6570\u95ee\u9898\u3002\u8bf7\u4fdd\u6301\u51b7\u9759\uff0c\u5e76\u4f9d\u6b21\u5c1d\u8bd5\u6bcf\u4e00\u79cd\u65b9\u6cd5\u6765\u91cd\u65b0\u83b7\u5f97\u8bbf\u95ee\u6743\u9650\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>\u6309\u7167\u987a\u5e8f\u9010\u6b65\u6267\u884c\u6bcf\u4e00\u4e2a\u6392\u969c\u6b65\u9aa4\uff0c\u4f60\u5c31\u80fd\u66f4\u5feb\u89e3\u51b3 SSH \u95ee\u9898\u3002\u8bf7\u8bb0\u5f55\u9519\u8bef\u4fe1\u606f\u548c\u6240\u505a\u7684\u66f4\u6539\u3002\u5982\u679c\u4f60\u65e0\u6cd5\u81ea\u884c\u4fee\u590d\uff0c\u8bf7\u63d0\u524d\u6574\u7406\u597d\u8be6\u7ec6\u4fe1\u606f\u4ee5\u4fbf\u8054\u7cfb\u6280\u672f\u652f\u6301\u3002\u5b9a\u671f\u5907\u4efd\u548c\u76d1\u63a7\u6709\u52a9\u4e8e\u9884\u9632\u672a\u6765\u518d\u6b21\u51fa\u73b0\u7c7b\u4f3c\u95ee\u9898\u3002\u4f60\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u5907\u4efd\u7b56\u7565\uff1a<\/p>\n<ul>\n<li>\n<p>\u5f02\u5730\u5907\u4efd\u53ef\u4ee5\u5728\u707e\u96be\u53d1\u751f\u65f6\u4fdd\u62a4\u4f60\u7684\u6570\u636e\u3002<\/p>\n<\/li>\n<li>\n<p>\u672c\u5730\u5907\u4efd\u76ee\u5f55\u53ef\u4ee5\u5e2e\u52a9\u4f60\u5feb\u901f\u6062\u590d\u6587\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p>\u7ed3\u6784\u5316\u7684\u5907\u4efd\u7b56\u7565\u53ef\u4ee5\u66f4\u597d\u5730\u4fdd\u969c\u6570\u636e\u5b89\u5168\u3002<\/p>\n<\/li>\n<\/ul>\n<p>SSH \u5b89\u5168\u4e0e\u76d1\u63a7\u65b9\u9762\u7684\u884c\u4e1a\u6807\u51c6\u5305\u62ec\uff1a<\/p>\n<div class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 50px\">\n<colgroup>\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\">\n    <\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u529f\u80fd<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u8bf4\u660e<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5f3a\u52a0\u5bc6<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u4fdd\u62a4\u6570\u636e\u5b89\u5168\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u670d\u52a1\u5668\u8eab\u4efd\u9a8c\u8bc1<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5728\u5efa\u7acb\u8fde\u63a5\u524d\u9a8c\u8bc1\u670d\u52a1\u5668\u8eab\u4efd\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5b8c\u6574\u6027\u4fdd\u62a4<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u786e\u4fdd\u6570\u636e\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u672a\u88ab\u7be1\u6539\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u538b\u7f29<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u901a\u8fc7\u538b\u7f29\u6570\u636e\u6765\u63d0\u5347\u6027\u80fd\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5bc6\u94a5\u4ea4\u6362\u65b9\u6cd5<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u786e\u4fdd\u5bc6\u94a5\u4ea4\u6362\u8fc7\u7a0b\u5b89\u5168\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u516c\u94a5\u7b97\u6cd5<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4f7f\u7528\u516c\u94a5\u5bc6\u7801\u5b66\u8fdb\u884c\u8eab\u4efd\u9a8c\u8bc1\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5bf9\u79f0\u52a0\u5bc6\u7b97\u6cd5<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4f7f\u7528\u5bf9\u79f0\u7b97\u6cd5\u5bf9\u6570\u636e\u8fdb\u884c\u52a0\u5bc6\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6d88\u606f\u8ba4\u8bc1\u7b97\u6cd5<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u786e\u8ba4\u6d88\u606f\u7684\u771f\u5b9e\u6027\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u54c8\u5e0c\u7b97\u6cd5<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u901a\u8fc7\u54c8\u5e0c\u6821\u9a8c\u6570\u636e\u5b8c\u6574\u6027\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>\u5e38\u89c1\u95ee\u9898<\/h2>\n<h3>\u5982\u679c\u4f60\u5fd8\u8bb0\u4e86 SSH \u5bc6\u7801\uff0c\u8be5\u600e\u4e48\u529e\uff1f<\/h3>\n<p>\u4f60\u53ef\u4ee5\u901a\u8fc7\u670d\u52a1\u5668\u79df\u7528\u63a7\u5236\u9762\u677f\u91cd\u7f6e\u5bc6\u7801\u3002\u8bf7\u67e5\u627e\u5bc6\u7801\u91cd\u7f6e\u9009\u9879\u3002\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f\u5bc6\u94a5\u8ba4\u8bc1\uff0c\u4e5f\u53ef\u4ee5\u4e0a\u4f20\u65b0\u7684\u516c\u94a5\u3002\u5b8c\u6210\u66f4\u6539\u540e\uff0c\u8bf7\u91cd\u542f\u670d\u52a1\u3002<\/p>\n<h3>\u5982\u4f55\u68c0\u67e5 SSH \u7aef\u53e3\u662f\u5426\u5f00\u653e\uff1f<\/h3>\n<p>\u8fd0\u884c <code>telnet &lt;server IP&gt; 22<\/code>\uff0c\u6216\u8005\u67e5\u770b\u4f60\u7684\u670d\u52a1\u5668\u79df\u7528\u9632\u706b\u5899\u8bbe\u7f6e\u3002\u5982\u679c\u80fd\u591f\u5efa\u7acb\u8fde\u63a5\uff0c\u5219\u8bf4\u660e\u7aef\u53e3\u5df2\u5f00\u653e\uff1b\u5982\u679c\u4e0d\u80fd\uff0c\u8bf7\u68c0\u67e5\u9632\u706b\u5899\u89c4\u5219\u5e76\u5f00\u653e 22 \u7aef\u53e3\u3002<\/p>\n<h3>\u4e3a\u4ec0\u4e48 SSH \u4f1a\u63d0\u793a\u201cconnection refused\uff08\u8fde\u63a5\u88ab\u62d2\u7edd\uff09\u201d\uff1f<\/h3>\n<p>\u8fd9\u8868\u793a\u670d\u52a1\u5668\u5f53\u524d\u4e0d\u63a5\u53d7\u8fde\u63a5\u3002\u53ef\u80fd\u662f SSH \u670d\u52a1\u672a\u542f\u52a8\uff0c\u4e5f\u53ef\u80fd\u662f\u9632\u706b\u5899\u963b\u6b62\u4e86\u8be5\u7aef\u53e3\u3002\u8bf7\u542f\u52a8\u670d\u52a1\u5e76\u68c0\u67e5\u9632\u706b\u5899\u8bbe\u7f6e\u3002<\/p>\n<h3>\u5982\u679c\u4e22\u5931\u4e86 SSH \u5bc6\u94a5\uff0c\u8fd8\u80fd\u6062\u590d\u8bbf\u95ee\u5417\uff1f<\/h3>\n<p>\u53ef\u4ee5\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u670d\u52a1\u5668\u79df\u7528\u63a7\u5236\u9762\u677f\u4e0a\u4f20\u65b0\u7684\u516c\u94a5\u3002\u6709\u4e9b\u670d\u52a1\u5546\u8fd8\u5141\u8bb8\u4f60\u91cd\u7f6e\u5bc6\u94a5\u6216\u5bc6\u7801\u3002\u8bf7\u52a1\u5fc5\u5c06\u5907\u7528\u5bc6\u94a5\u4fdd\u5b58\u5728\u5b89\u5168\u4f4d\u7f6e\u3002<\/p>\n<h3>\u670d\u52a1\u5668\u56e0 SSH \u95ee\u9898\u65e0\u6cd5\u8bbf\u95ee\u540e\uff0c\u6700\u5b89\u5168\u7684\u6062\u590d\u65b9\u5f0f\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u4ece\u6700\u8fd1\u7684\u5907\u4efd\u4e2d\u6062\u590d\u662f\u6700\u5b89\u5168\u7684\u65b9\u6cd5\u3002\u4f7f\u7528\u4f60\u7684\u670d\u52a1\u5546\u63d0\u4f9b\u7684\u5907\u4efd\u5de5\u5177\uff0c\u5e76\u5728\u6062\u590d\u524d\u68c0\u67e5\u5907\u4efd\u662f\u5426\u5305\u542b\u91cd\u8981\u6587\u4ef6\u3002\u8fd9\u6837\u53ef\u4ee5\u4fdd\u62a4\u4f60\u7684\u6570\u636e\uff0c\u5e76\u907f\u514d\u8fdb\u4e00\u6b65\u7684\u95ee\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u4f60\u53d1\u73b0\u670d\u52a1\u5668\u65e0\u6cd5\u901a\u8fc7 SSH \u8fde\u63a5\u65f6\uff0c\u96be\u514d\u4f1a\u611f\u5230\u6cae\u4e27\u6216\u62c5\u5fe7\u3002\u8bf7\u5148\u4fdd\u6301\u51b7\u9759\u3002\u4f60\u53ef\u4ee5\u6309\u7167\u660e\u786e\u7684\u6b65\u9aa4\u6765\u89e3\u51b3\u95ee\u9898\uff0c\u5e76\u4e14\u65e0\u9700\u5192\u7740\u6570\u636e\u98ce\u9669\u76f2\u76ee\u64cd\u4f5c\u3002\u8bf7\u8010\u5fc3\u9605\u8bfb\u672c\u6307\u5357\u3002\u4f60\u5c06\u5b66\u4f1a\u5982\u4f55\u5728\u4fdd\u969c\u6570\u636e\u5b89\u5168\u7684\u524d\u63d0\u4e0b\u5904\u7406\u8fd9\u4e00\u95ee\u9898\u3002\u4e3a\u4e86\u83b7\u5f97\u6700\u4f73\u6548\u679c\uff0c\u8bf7\u6309\u987a\u5e8f\u9010\u6b65\u6392\u67e5\u3002 \u5f53\u670d\u52a1\u5668\u65e0\u6cd5\u8fde\u63a5\u65f6\u7684\u7d27\u6025\u5904\u7406\u63aa\u65bd \u5f53\u4f60\u53d1\u73b0\u670d\u52a1\u5668\u65e0\u6cd5\u8fde\u63a5\u65f6\uff0c\u5e94\u5c3d\u5feb\u5148\u68c0\u67e5\u4e00\u4e9b\u57fa\u7840\u9879\u76ee\u3002\u8fd9\u4e9b\u521d\u6b65\u6b65\u9aa4\u53ef\u4ee5\u5e2e\u52a9\u4f60\u5728\u8fdb\u5165\u66f4\u6df1\u5165\u7684\u6545\u969c\u6392\u67e5\u4e4b\u524d\uff0c\u5148\u53d1\u73b0\u4e00\u4e9b\u7b80\u5355\u95ee\u9898\u3002 \u68c0\u67e5\u670d\u52a1\u5668\u72b6\u6001\u548c\u8fd0\u884c\u65f6\u95f4 \u9996\u5148\uff0c\u786e\u8ba4\u4f60\u7684\u670d\u52a1\u5668\u5b9e\u9645\u4e0a\u6b63\u5728\u8fd0\u884c\u3002\u8bb8\u591a\u670d\u52a1\u5546\u90fd\u4f1a\u63d0\u4f9b\u63a7\u5236\u9762\u677f\uff0c\u4f60\u53ef\u4ee5\u5728\u5176\u4e2d\u67e5\u770b\u670d\u52a1\u5668\u662f\u5426\u5728\u7ebf\u3002\u5982\u679c\u4f60\u770b\u5230\u670d\u52a1\u5668\u5df2\u505c\u6b62\u6216\u88ab\u6682\u505c\uff0c\u90a3\u4e48\u4f60\u5c06\u65e0\u6cd5\u8fde\u63a5\u3002\u6709\u4e9b\u670d\u52a1\u5546\u53ef\u80fd\u4f1a\u56e0\u6ee5\u7528\u884c\u4e3a\u6216\u8d26\u5355\u903e\u671f\u800c\u9501\u5b9a\u670d\u52a1\u5668\u3002\u8bf7\u67e5\u770b\u662f\u5426\u6709\u4efb\u4f55\u5173\u4e8e\u670d\u52a1\u5668\u72b6\u6001\u7684\u63d0\u9192\u6216\u8b66\u544a\u3002\u5982\u679c\u4f60\u770b\u5230\u201cconnection refused\uff08\u8fde\u63a5\u88ab\u62d2\u7edd\uff09\u201d\u4e4b\u7c7b\u7684\u4fe1\u606f\uff0c\u8bf4\u660e\u670d\u52a1\u5668\u53ef\u80fd\u6ca1\u6709\u63a5\u53d7\u8fde\u63a5\u8bf7\u6c42\u3002 \u63d0\u793a\uff1a\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f\u4e91\u670d\u52a1\u5668\u79df\u7528\uff0c\u8bf7\u68c0\u67e5\u5b9e\u4f8b\u72b6\u6001\u3002\u5b9e\u4f8b\u5904\u4e8e\u5df2\u505c\u6b62\u6216\u6b63\u5728\u91cd\u542f\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4 connection timeout\uff08\u8fde\u63a5\u8d85\u65f6\uff09\u3002 \u67e5\u770b\u670d\u52a1\u5668\u79df\u7528\u63a7\u5236\u9762\u677f\u4e2d\u7684\u544a\u8b66\u4fe1\u606f \u63a5\u4e0b\u6765\uff0c\u767b\u5f55\u4f60\u7684\u670d\u52a1\u5668\u79df\u7528\u63a7\u5236\u9762\u677f\uff0c\u67e5\u770b\u5176\u4e2d\u7684\u544a\u8b66\u6216\u901a\u77e5\u3002\u8fd9\u4e9b\u4fe1\u606f\u53ef\u80fd\u4f1a\u63d0\u793a\u4f60\u662f\u5426\u5b58\u5728\u6ee5\u7528\u9501\u5b9a\u3001\u7ef4\u62a4\u6216\u7f51\u7edc\u95ee\u9898\u3002\u5982\u679c\u4f60\u770b\u5230 authentication failed\uff08\u8eab\u4efd\u9a8c\u8bc1\u5931\u8d25\uff09\u7684\u63d0\u793a\uff0c\u8bf7\u518d\u6b21\u786e\u8ba4\u4f60\u7684\u7528\u6237\u540d\u3001\u79c1\u94a5\u8def\u5f84\u4ee5\u53ca\u53e3\u4ee4\u77ed\u8bed\u662f\u5426\u6b63\u786e\u3002\u6709\u4e9b\u63a7\u5236\u9762\u677f\u4f1a\u663e\u793a\u670d\u52a1\u5668 unable to ssh\uff08\u65e0\u6cd5 SSH \u767b\u5f55\uff09\u662f\u5426\u662f\u7531\u4e8e\u9632\u706b\u5899\u89c4\u5219\u6216\u7aef\u53e3\u88ab\u963b\u6b62\u6240\u5bfc\u81f4\u3002\u5982\u679c\u4f60\u770b\u5230 connection timeout\uff08\u8fde\u63a5\u8d85\u65f6\uff09\uff0c\u8bf7\u68c0\u67e5\u6b63\u786e\u7684\u7aef\u53e3\u662f\u5426\u5df2\u5f00\u653e\u3002 \u4f60\u53ef\u80fd\u4f1a\u770b\u5230\u7684\u5e38\u89c1\u544a\u8b66\uff1a Authentication failed\uff08\u8eab\u4efd\u9a8c\u8bc1\u5931\u8d25\uff09\u2014\u2014\u68c0\u67e5\u4f60\u7684\u767b\u5f55\u4fe1\u606f\u3002 Passphrase required\uff08\u9700\u8981\u53e3\u4ee4\u77ed\u8bed\uff09\u2014\u2014\u8f93\u5165\u4f60\u7684 SSH \u53e3\u4ee4\u77ed\u8bed\u3002 Connection timed out\uff08\u8fde\u63a5\u8d85\u65f6\uff09\u2014\u2014\u68c0\u67e5\u4f60\u7684\u9632\u706b\u5899\u548c\u7aef\u53e3\u8bbe\u7f6e\u3002 \u786e\u8ba4\u7f51\u7edc\u548c IP \u5730\u5740 \u4f60\u9700\u8981\u786e\u4fdd\u81ea\u5df1\u4f7f\u7528\u7684\u662f\u6b63\u786e\u7684 IP \u5730\u5740\u6216\u4e3b\u673a\u540d\u3002\u4e00\u4e2a\u5f88\u5c0f\u7684\u62fc\u5199\u9519\u8bef\u90fd\u53ef\u80fd\u5bfc\u81f4\u8fde\u63a5\u5931\u8d25\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528 ping \u547d\u4ee4\u68c0\u67e5\u4e3b\u673a\u540d\u662f\u5426\u80fd\u591f\u6b63\u786e\u89e3\u6790\u3002\u5982\u679c ping \u5931\u8d25\uff0c\u53ef\u5c1d\u8bd5\u4f7f\u7528\u7b2c\u4e09\u65b9 DNS \u68c0\u67e5\u5de5\u5177\u6765\u786e\u8ba4\u4e3b\u673a\u540d\u662f\u5426\u6b63\u786e\u3002\u59cb\u7ec8\u4f7f\u7528\u670d\u52a1\u5546\u63d0\u4f9b\u7684 IP \u5730\u5740\u6216\u4e3b\u673a\u540d\u3002\u5982\u679c\u4f7f\u7528\u9519\u8bef\uff0c\u5c31\u53ef\u80fd\u4f1a\u770b\u5230\u5982 connection refused\uff08\u8fde\u63a5\u88ab\u62d2\u7edd\uff09\u4e4b\u7c7b\u7684\u9519\u8bef\u3002 \u4e3b\u673a\u540d\u62fc\u5199\u9519\u8bef\u4f1a\u5bfc\u81f4\u65e0\u6cd5\u8bbf\u95ee\u3002 Ping \u53ef\u4ee5\u5e2e\u52a9\u4f60\u6d4b\u8bd5\u670d\u52a1\u5668\u662f\u5426\u6709\u54cd\u5e94\u3002 DNS \u68c0\u67e5\u5de5\u5177\u53ef\u4ee5\u786e\u8ba4\u4e3b\u673a\u540d\u662f\u5426\u6709\u6548\u3002 \u901a\u8fc7\u6267\u884c\u8fd9\u4e9b\u7d27\u6025\u5904\u7406\u6b65\u9aa4\uff0c\u4f60\u901a\u5e38\u53ef\u4ee5\u8f83\u5feb\u627e\u51fa\u4e3a\u4ec0\u4e48\u65e0\u6cd5\u901a\u8fc7 SSH [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/what-to-do-when-the-server-cannot-connect-to-ssh\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":12,"featured_media":33305,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[76],"tags":[],"class_list":["post-33308","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5f53\u670d\u52a1\u5668\u65e0\u6cd5\u8fde\u63a5 SSH \u65f6\u8be5\u600e\u4e48\u529e<\/title>\n<meta name=\"description\" content=\"\u5f53\u670d\u52a1\u5668\u65e0\u6cd5\u901a\u8fc7 SSH \u8fde\u63a5\u65f6\uff0c\u53ef\u901a\u8fc7\u68c0\u67e5\u670d\u52a1\u5668\u72b6\u6001\u3001\u7f51\u7edc\u3001\u9632\u706b\u5899\u548c SSH \u8bbe\u7f6e\u6765\u89e3\u51b3\u95ee\u9898\u3002\u6309\u7167\u5206\u6b65\u4fee\u590d\u65b9\u6cd5\u5b89\u5168\u6062\u590d\u8bbf\u95ee\u3002\" \/>\n<meta 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