{"id":12183,"date":"2022-09-16T08:49:21","date_gmt":"2022-09-16T08:49:21","guid":{"rendered":"https:\/\/www.varidata.com\/kb\/how-to-troubleshoot-ssh-connectivity-issues"},"modified":"2022-10-12T03:20:11","modified_gmt":"2022-10-12T03:20:11","slug":"how-to-troubleshoot-ssh-connectivity-issues","status":"publish","type":"kb","link":"https:\/\/www.varidata.com\/zh-tw\/kb\/how-to-troubleshoot-ssh-connectivity-issues\/","title":{"rendered":"\u5982\u4f55\u6539\u8b8aLinux\u96f2\u4f3a\u670d\u5668\u7684SSH\u57e0"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row gap=&#8221;25&#8243; css=&#8221;.vc_custom_1659597621929{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;}&#8221;][vc_column css=&#8221;.vc_custom_1659597638453{margin-top: 0px !important;padding-top: 0px !important;border-radius: 20px !important;}&#8221;][vc_column_text el_class=&#8221;sub-title&#8221; css=&#8221;.vc_custom_1664266199957{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;}&#8221;]\u76ee\u7684[\/vc_column_text][vc_column_text el_class=&#8221;content&#8221; css=&#8221;.vc_custom_1664266457551{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;}&#8221;]SSH\uff08Secure shell\uff09\u662f\u4e00\u7a2e\u52a0\u5bc6\u7db2\u7d61\u5354\u8b70\uff0c\u7528\u65bc\u5b89\u5168\u5730\u9023\u63a5\u5230\u9060\u7a0b\u4f3a\u670d\u5668\uff0c\u5b83\u5728\u4e3b\u6a5f\u548c\u5ba2\u6236\u6a5f\u4e4b\u9593\u4ee5\u52a0\u5bc6\u7684\u5f62\u5f0f\u50b3\u8f38\u6578\u64da\u3002<\/p>\n<p>SSH\u7684\u9ed8\u8a8dTCP\u57e0\u662f22\uff0c\u5982\u679c\u5c07\u9019\u500b\u9ed8\u8a8d\u57e0\u6539\u70ba\u53e6\u4e00\u500b\uff0c\u53ef\u4ee5\u9632\u6b62\u81ea\u52d5\u6a5f\u5668\u4eba\u548c\u60e1\u610f\u7528\u6236\u88ab\u6b98\u5fcd\u5730\u5f37\u884c\u9032\u5165\u4f3a\u670d\u5668\u3002<\/p>\n<p>\u5728\u66f4\u6539\u9ed8\u8a8d\u7684SSH\u57e0\u865f\u4e4b\u524d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u547d\u4ee4\u6aa2\u67e5\u7576\u524d\u7684\u57e0\u3002<\/p>\n<pre><code># netstat -ntlp | grep ssh<\/code><\/pre>\n<p>\u672c\u6307\u5357\u5c07\u63cf\u8ff0\u5728Linux\u4f3a\u670d\u5668\u7684\u9632\u706b\u7246\u4e2d\u66f4\u6539SSH\u57e0\u548c\u6dfb\u52a0\u65b0\u7684\u81ea\u5b9a\u7fa9SSH\u57e0\u7684\u6b65\u9a5f\u3002[\/vc_column_text][vc_column_text el_class=&#8221;sub-title&#8221; css=&#8221;.vc_custom_1664266465171{margin-top: 0px !important;margin-bottom: 0px !important;}&#8221;]\u66f4\u6539SSH\u57e0[\/vc_column_text][vc_column_text el_class=&#8221;content&#8221; css=&#8221;.vc_custom_1664266495749{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 15px !important;}&#8221;]1. \u6253\u958bSSH\u5b88\u8b77\u9032\u7a0b\u4e3b\u914d\u7f6e\u6587\u4ef6\/etc\/ssh\/sshd_config<\/p>\n<pre><code># vi \/etc\/ssh\/sshd_config<\/code><\/pre>\n<p>2. \u73fe\u5728\u641c\u7d22\u884c\u4ee5Port 22\u958b\u59cb\uff0c\u4e26\u5728\u884c\u524d\u6dfb\u52a0\u6a19\u7c64(#)\u3002\u7136\u5f8c\u5728\u4e0b\u9762\u6dfb\u52a0\u4e00\u689d\u65b0\u7684Port line\uff0c\u5176\u4e2d\u5305\u542b\u81ea\u5b9a\u7fa9\uff0c\u5982\u5716\u6240\u793a\u3002<br \/>\n\u6ce8\u610f\uff1a\u5c07\u793a\u4f8b\u57e0\u865f2223\u66ff\u63db\u70ba\u9700\u8981\u8a2d\u7f6e\u7684\u81ea\u5b9a\u7fa9\u57e0\u3002<\/p>\n<p>3. \u4fdd\u5b58\u4e26\u9000\u51fa\u3002[\/vc_column_text][vc_column_text el_class=&#8221;sub-title&#8221; css=&#8221;.vc_custom_1664266508779{margin-top: 0px !important;margin-bottom: 0px !important;}&#8221;]\u5728\u4f3a\u670d\u5668\u9632\u706b\u7246\u4e2d\u6dfb\u52a0\u65b0\u7684\u81ea\u5b9a\u7fa9SSH\u57e0[\/vc_column_text][vc_column_text el_class=&#8221;content&#8221; css=&#8221;.vc_custom_1664266651525{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 15px !important;}&#8221;]1. \u4f7f\u7528UFW (Ubuntu\/Debian)\u8a2d\u7f6e\u9632\u706b\u7246\u3002<\/p>\n<pre><code># ufw allow 2223\/tcp<\/code><\/pre>\n<p>2. \u6dfb\u52a0IPTables\u4e26\u9a57\u8b49(\u6240\u6709Linux\u4f5c\u696d\u7cfb\u7d71)\u3002<\/p>\n<pre><code># iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 2223 -j ACCEPT<\/code><\/pre>\n<pre><code># iptables -L<\/code><\/pre>\n<p>3. \u5728FirewallD (CentOS 7\/8)\u4e2d\u6dfb\u52a0\u3002<\/p>\n<pre><code># firewall-cmd --permanent --zone=public --add-port=2223\/tcp<\/code><\/pre>\n<pre><code># firewall-cmd --reload<\/code><\/pre>\n<p>\u6ce8\u610f\uff1a\u793a\u4f8b\u57e0\u865f2223\u66ff\u63db\u70ba\u9700\u8981\u8a2d\u7f6e\u7684\u81ea\u5b9a\u7fa9\u57e0\u865f\u3002[\/vc_column_text][vc_column_text el_class=&#8221;sub-title&#8221; css=&#8221;.vc_custom_1664266583219{margin-top: 0px !important;margin-bottom: 0px !important;}&#8221;]\u91cd\u91cd\u555fSSH\u9032\u7a0b\u4f7f\u4fee\u6539\u751f\u6548[\/vc_column_text][vc_column_text el_class=&#8221;content&#8221; css=&#8221;.vc_custom_1664266614997{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 15px !important;}&#8221;]\u904b\u884c\u4ee5\u4e0b\u547d\u4ee4\u91cd\u65b0\u555f\u52d5SSH daemon\uff0c\u4e26\u9a57\u8b49\u57e0\u662f\u5426\u5df2\u66f4\u6539\u3002<\/p>\n<pre><code># systemctl restart sshd<\/code><\/pre>\n<pre><code># netstat -ntlp | grep ssh<\/code><\/pre>\n<p>[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"featured_media":0,"template":"","kb_category":[464],"class_list":["post-12183","kb","type-kb","status-publish","hentry","kb_category-linux-tc"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5982\u4f55\u6539\u8b8aLinux\u96f2\u4f3a\u670d\u5668\u7684SSH\u57e0 - Varidata Limited<\/title>\n<meta name=\"description\" content=\"\u76ee\u7684SSH\uff08Secure 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