{"id":11928,"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":"2022-10-07T07:53:38","modified_gmt":"2022-10-07T07:53:38","slug":"how-to-troubleshoot-ssh-connectivity-issues","status":"publish","type":"kb","link":"https:\/\/www.varidata.com\/zh-cn\/kb\/how-to-troubleshoot-ssh-connectivity-issues\/","title":{"rendered":"\u5982\u4f55\u6539\u53d8Linux\u4e91\u670d\u52a1\u5668\u7684SSH\u7aef\u53e3"},"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\u79cd\u52a0\u5bc6\u7f51\u7edc\u534f\u8bae\uff0c\u7528\u4e8e\u5b89\u5168\u5730\u8fde\u63a5\u5230\u8fdc\u7a0b\u670d\u52a1\u5668\uff0c\u5b83\u5728\u4e3b\u673a\u548c\u5ba2\u6237\u673a\u4e4b\u95f4\u4ee5\u52a0\u5bc6\u7684\u5f62\u5f0f\u4f20\u8f93\u6570\u636e\u3002<\/p>\n<p>SSH\u7684\u9ed8\u8ba4TCP\u7aef\u53e3\u662f22\uff0c\u5982\u679c\u5c06\u8fd9\u4e2a\u9ed8\u8ba4\u7aef\u53e3\u6539\u4e3a\u53e6\u4e00\u4e2a\uff0c\u53ef\u4ee5\u9632\u6b62\u81ea\u52a8\u673a\u5668\u4eba\u548c\u6076\u610f\u7528\u6237\u88ab\u6b8b\u5fcd\u5730\u5f3a\u884c\u8fdb\u5165\u670d\u52a1\u5668\u3002<\/p>\n<p>\u5728\u66f4\u6539\u9ed8\u8ba4\u7684SSH\u7aef\u53e3\u53f7\u4e4b\u524d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u547d\u4ee4\u68c0\u67e5\u5f53\u524d\u7684\u7aef\u53e3\u3002<\/p>\n<pre><code># netstat -ntlp | grep ssh<\/code><\/pre>\n<p>\u672c\u6307\u5357\u5c06\u63cf\u8ff0\u5728Linux\u670d\u52a1\u5668\u7684\u9632\u706b\u5899\u4e2d\u66f4\u6539SSH\u7aef\u53e3\u548c\u6dfb\u52a0\u65b0\u7684\u81ea\u5b9a\u4e49SSH\u7aef\u53e3\u7684\u6b65\u9aa4\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\u7aef\u53e3[\/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\u5f00SSH\u5b88\u62a4\u8fdb\u7a0b\u4e3b\u914d\u7f6e\u6587\u4ef6\/etc\/ssh\/sshd_config<\/p>\n<pre><code># vi \/etc\/ssh\/sshd_config<\/code><\/pre>\n<p>2. \u73b0\u5728\u641c\u7d22\u884c\u4ee5Port 22\u5f00\u59cb\uff0c\u5e76\u5728\u884c\u524d\u6dfb\u52a0\u6807\u7b7e(#)\u3002\u7136\u540e\u5728\u4e0b\u9762\u6dfb\u52a0\u4e00\u6761\u65b0\u7684Port line\uff0c\u5176\u4e2d\u5305\u542b\u81ea\u5b9a\u4e49\uff0c\u5982\u56fe\u6240\u793a\u3002<br \/>\n\u6ce8\u610f\uff1a\u5c06\u793a\u4f8b\u7aef\u53e3\u53f72223\u66ff\u6362\u4e3a\u9700\u8981\u8bbe\u7f6e\u7684\u81ea\u5b9a\u4e49\u7aef\u53e3\u3002<\/p>\n<p>3. \u4fdd\u5b58\u5e76\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\u670d\u52a1\u5668\u9632\u706b\u5899\u4e2d\u6dfb\u52a0\u65b0\u7684\u81ea\u5b9a\u4e49SSH\u7aef\u53e3[\/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)\u8bbe\u7f6e\u9632\u706b\u5899\u3002<\/p>\n<pre><code># ufw allow 2223\/tcp<\/code><\/pre>\n<p>2. \u6dfb\u52a0IPTables\u5e76\u9a8c\u8bc1(\u6240\u6709Linux\u64cd\u4f5c\u7cfb\u7edf)\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\u7aef\u53e3\u53f72223\u66ff\u6362\u4e3a\u9700\u8981\u8bbe\u7f6e\u7684\u81ea\u5b9a\u4e49\u7aef\u53e3\u53f7\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\u542fSSH\u8fdb\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;]\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\u91cd\u65b0\u542f\u52a8SSH daemon\uff0c\u5e76\u9a8c\u8bc1\u7aef\u53e3\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":[463],"class_list":["post-11928","kb","type-kb","status-publish","hentry","kb_category-linux-sc"],"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\u53d8Linux\u4e91\u670d\u52a1\u5668\u7684SSH\u7aef\u53e3 - Varidata Limited<\/title>\n<meta name=\"description\" content=\"\u76ee\u7684SSH\uff08Secure 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