{"id":208682,"date":"2025-09-29T20:30:47","date_gmt":"2025-09-29T12:30:47","guid":{"rendered":"https:\/\/www.server.hk\/blog\/208682\/"},"modified":"2025-09-29T20:30:48","modified_gmt":"2025-09-29T12:30:48","slug":"ssh","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208682\/","title":{"rendered":"\u9999\u6e2fVPS \u5b89\u5168\u5fc5\u5907\uff1a\u7528 SSH \u5bc6\u94a5\u5b9e\u73b0\u514d\u5bc6\u7801\u767b\u5f55"},"content":{"rendered":"<h2>\u5f15\u8a00<\/h2>\n<p>\u5728\u5f53\u4eca\u4e92\u8054\u7f51\u73af\u5883\u4e0b\uff0c\u670d\u52a1\u5668\u7684\u8fdc\u7a0b\u8bbf\u95ee\u5b89\u5168\u5df2\u7ecf\u6210\u4e3a\u7ad9\u957f\u3001\u4f01\u4e1a\u548c\u5f00\u53d1\u8005\u5fc5\u987b\u91cd\u89c6\u7684\u95ee\u9898\u3002\u5bf9\u4e8e\u4f7f\u7528\u9999\u6e2fVPS\u7684\u7528\u6237\u6765\u8bf4\uff0c\u91c7\u7528\u57fa\u4e8e\u516c\u94a5\u7684 SSH \u8ba4\u8bc1\u5b9e\u73b0\u514d\u5bc6\u7801\u767b\u5f55\uff0c\u662f\u63d0\u9ad8\u5b89\u5168\u6027\u548c\u8fd0\u7ef4\u6548\u7387\u7684\u57fa\u7840\u505a\u6cd5\u3002\u672c\u6587\u5c06\u4ece\u539f\u7406\u3001\u5177\u4f53\u64cd\u4f5c\u3001\u4f18\u52bf\u5bf9\u6bd4\u4e0e\u9009\u8d2d\u5efa\u8bae\u7b49\u65b9\u9762\uff0c\u8be6\u5c3d\u8bb2\u89e3\u5982\u4f55\u4e3a\u4f60\u7684\u9999\u6e2f\u670d\u52a1\u5668\uff08\u6216\u7f8e\u56fdVPS\u3001\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u90e8\u7f72\u548c\u7ba1\u7406 SSH \u5bc6\u94a5\u767b\u5f55\uff0c\u5e76\u63d0\u4f9b\u5b9e\u6218\u7ea7\u7684\u914d\u7f6e\u8981\u70b9\u4e0e\u8fd0\u7ef4\u5efa\u8bae\u3002<\/p>\n<h2>SSH \u516c\u94a5\u8ba4\u8bc1\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>SSH \u7684\u516c\u94a5\u8ba4\u8bc1\u57fa\u4e8e\u975e\u5bf9\u79f0\u52a0\u5bc6\uff1a\u5ba2\u6237\u7aef\u751f\u6210\u4e00\u5bf9\u5bc6\u94a5\uff08\u79c1\u94a5\u4e0e\u516c\u94a5\uff09\uff0c\u79c1\u94a5\u4fdd\u5b58\u5728\u5ba2\u6237\u7aef\u8bbe\u5907\uff0c\u516c\u94a5\u88ab\u653e\u7f6e\u5230\u670d\u52a1\u5668\u4e0a\u7684 <strong>~\/.ssh\/authorized_keys<\/strong>\u3002\u5f53\u5ba2\u6237\u7aef\u8fde\u63a5\u65f6\uff0c\u670d\u52a1\u5668\u4f1a\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u4e00\u4e2a\u968f\u673a\u6311\u6218\uff0c\u5ba2\u6237\u7aef\u7528\u79c1\u94a5\u7b7e\u540d\u5e76\u8fd4\u56de\uff0c\u670d\u52a1\u5668\u7528\u516c\u94a5\u9a8c\u8bc1\u7b7e\u540d\uff0c\u4ece\u800c\u5b9e\u73b0\u65e0\u5bc6\u7801\u4f46\u5b89\u5168\u7684\u767b\u5f55\u3002<\/p>\n<h3>\u5e38\u89c1\u5bc6\u94a5\u7c7b\u578b\u4e0e\u63a8\u8350<\/h3>\n<ul>\n<li><strong>RSA<\/strong>\uff1a\u517c\u5bb9\u6027\u6700\u597d\uff0c\u4f46\u5efa\u8bae\u4f7f\u7528 3072 \u6216 4096 \u4f4d\u4ee5\u786e\u4fdd\u5b89\u5168\u3002<\/li>\n<li><strong>ECDSA<\/strong>\uff1a\u57fa\u4e8e\u692d\u5706\u66f2\u7ebf\uff0c\u5bc6\u94a5\u66f4\u77ed\u6027\u80fd\u66f4\u597d\uff0c\u4f46\u517c\u5bb9\u6027\u7a0d\u900a\u3002<\/li>\n<li><strong>Ed25519<\/strong>\uff1a\u73b0\u4ee3\u63a8\u8350\uff0c\u5b89\u5168\u3001\u6027\u80fd\u548c\u5bc6\u94a5\u957f\u5ea6\u90fd\u4f18\u4e8e\u4f20\u7edf\u7b97\u6cd5\uff08OpenSSH 7.0+ \u652f\u6301\uff09\u3002<\/li>\n<\/ul>\n<h2>\u5728\u5ba2\u6237\u7aef\u751f\u6210\u5bc6\u94a5\u5e76\u90e8\u7f72\u5230\u9999\u6e2fVPS\uff08\u6216\u5176\u4ed6\u670d\u52a1\u5668\uff09<\/h2>\n<p>\u4e0b\u9762\u7ed9\u51fa\u5728\u5e38\u89c1\u5e73\u53f0\u4e0a\u751f\u6210\u5e76\u90e8\u7f72 SSH \u5bc6\u94a5\u7684\u6b65\u9aa4\uff0c\u9002\u7528\u4e8e Linux\/macOS\u3001Windows\uff08\u4f7f\u7528 PuTTY\/WSL\uff09\uff0c\u540c\u6837\u9002\u7528\u4e8e\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fdVPS \u73af\u5883\u3002<\/p>\n<h3>\u5728 Linux\/macOS \u4e0a<\/h3>\n<ul>\n<li>\u751f\u6210\u5bc6\u94a5\uff1a\u5728\u7ec8\u7aef\u8fd0\u884c\uff08\u4ee5 Ed25519 \u4e3a\u4f8b\uff09\uff1a\n<p>ssh-keygen -t ed25519 -C &#8220;your_email@example.com&#8221;<\/p>\n<p>\u4f1a\u63d0\u793a\u4fdd\u5b58\u8def\u5f84\uff0c\u9ed8\u8ba4\u662f <strong>~\/.ssh\/id_ed25519<\/strong>\uff0c\u5e76\u5efa\u8bae\u8bbe\u7f6e\u4e00\u4e2a<strong>\u79c1\u94a5\u53e3\u4ee4\uff08passphrase\uff09<\/strong>\u6765\u9632\u6b62\u5bc6\u94a5\u88ab\u6ee5\u7528\u3002<\/p>\n<\/li>\n<li>\u628a\u516c\u94a5\u590d\u5236\u5230\u670d\u52a1\u5668\uff1a\u53ef\u4ee5\u7528 <strong>ssh-copy-id<\/strong>\uff08\u82e5\u670d\u52a1\u5668\u4ecd\u5141\u8bb8\u5bc6\u7801\u767b\u5f55\uff09\uff1a\n<p>ssh-copy-id -i ~\/.ssh\/id_ed25519.pub user@your-hk-vps-ip<\/p>\n<p>\u4e5f\u53ef\u4ee5\u624b\u52a8\u5c06\u516c\u94a5\u5185\u5bb9\u8ffd\u52a0\u5230\u670d\u52a1\u5668\u7684 <strong>~\/.ssh\/authorized_keys<\/strong>\uff0c\u5e76\u786e\u4fdd\u6743\u9650\u6b63\u786e\u3002<\/p>\n<\/li>\n<li>\u6743\u9650\u6821\u9a8c\uff1a\u5728\u670d\u52a1\u5668\u4e0a\u6267\u884c\uff1a\n<p>chmod 700 ~\/.ssh<\/p>\n<p>chmod 600 ~\/.ssh\/authorized_keys<\/p>\n<\/li>\n<\/ul>\n<h3>\u5728 Windows \u4e0a\uff08PuTTY\uff09<\/h3>\n<ul>\n<li>\u4f7f\u7528 PuTTYgen \u751f\u6210\u5bc6\u94a5\u5bf9\uff0c\u4fdd\u5b58 PPK \u79c1\u94a5\u548c\u516c\u94a5\u6587\u672c\u3002<\/li>\n<li>\u5c06\u516c\u94a5\u6587\u672c\u7c98\u8d34\u5230\u670d\u52a1\u5668\u7684 <strong>authorized_keys<\/strong>\uff0c\u6216\u4f7f\u7528 WinSCP\/PSCP \u4e0a\u4f20\u3002<\/li>\n<li>\u5728 PuTTY \u914d\u7f6e\u4e2d\u6307\u5b9a PPK \u6587\u4ef6\u4ee5\u5b9e\u73b0\u514d\u5bc6\u7801\u767b\u5f55\u3002<\/li>\n<li>\u4e5f\u53ef\u4f7f\u7528 WSL \u6216 Windows 10+ \u7684 OpenSSH \u5ba2\u6237\u7aef\uff0c\u6b65\u9aa4\u4e0e Linux\/macOS \u7c7b\u4f3c\u3002<\/li>\n<\/ul>\n<h2>sshd \u914d\u7f6e\u4e0e\u589e\u5f3a\u5b89\u5168\u7b56\u7565<\/h2>\n<p>\u90e8\u7f72\u516c\u94a5\u767b\u5f55\u540e\uff0c\u52a1\u5fc5\u5728\u670d\u52a1\u5668\u4e0a\u8c03\u6574 sshd \u914d\u7f6e\u4ee5\u8fdb\u4e00\u6b65\u63d0\u5347\u5b89\u5168\u6027\u3002\u4fee\u6539 \/etc\/ssh\/sshd_config \u65f6\u8bf7\u8c28\u614e\uff0c\u4fee\u6539\u540e\u91cd\u542f\u6216 reload sshd\u3002<\/p>\n<h3>\u5173\u952e\u914d\u7f6e\u9879\u793a\u4f8b<\/h3>\n<ul>\n<li>\u7981\u7528\u5bc6\u7801\u767b\u5f55\uff08\u5f3a\u70c8\u5efa\u8bae\uff0c\u4ec5\u5728\u5df2\u786e\u8ba4\u516c\u94a5\u53ef\u7528\u65f6\u64cd\u4f5c\uff09\uff1a\n<p>PasswordAuthentication no<\/p>\n<\/li>\n<li>\u7981\u6b62 root \u76f4\u63a5\u767b\u5f55\u6216\u53ea\u5141\u8bb8\u901a\u8fc7\u5bc6\u94a5\u767b\u5f55\uff1a\n<p>PermitRootLogin prohibit-password\uff08\u6216 no\uff09<\/p>\n<\/li>\n<li>\u53ea\u5141\u8bb8\u6307\u5b9a\u7528\u6237\u6216\u7ec4\u767b\u5f55\uff1a\n<p>AllowUsers deploy admin<\/p>\n<\/li>\n<li>\u5173\u95ed\u57fa\u4e8e PAM \u7684\u5f31\u8ba4\u8bc1\uff08\u89c6\u9700\u6c42\uff09\uff1a\n<p>UsePAM no<\/p>\n<\/li>\n<li>\u9650\u5236\u534f\u8bae\u4e0e\u767b\u5f55\u5c1d\u8bd5\u6b21\u6570\uff1a\n<p>MaxAuthTries 3<\/p>\n<\/li>\n<\/ul>\n<h3>\u914d\u5408\u5176\u5b83\u5b89\u5168\u5de5\u5177<\/h3>\n<ul>\n<li><strong>Fail2ban<\/strong>\uff1a\u76d1\u63a7 SSH \u767b\u5f55\u5931\u8d25\u5e76\u81ea\u52a8\u5c01\u7981\u6076\u610f IP\u3002<\/li>\n<li><strong>Firewall\uff08ufw\/iptables\/nftables\uff09<\/strong>\uff1a\u4ec5\u6253\u5f00\u5fc5\u8981\u7aef\u53e3\uff0c\u7ed3\u5408\u7aef\u53e3\u8f6c\u79fb\uff08\u975e 22\uff09\u80fd\u964d\u4f4e\u88ab\u626b\u63cf\u98ce\u9669\u3002<\/li>\n<li><strong>\u4e24\u6b65\u8ba4\u8bc1<\/strong>\uff1a\u5bf9\u7ba1\u7406\u9762\u677f\u6216\u7279\u6b8a\u670d\u52a1\u4f7f\u7528\u4e8c\u6b21\u8ba4\u8bc1\u4ee5\u63d0\u5347\u5b89\u5168\u7b49\u7ea7\u3002<\/li>\n<li><strong>SSH Agent \u4e0e Forwarding<\/strong>\uff1a\u901a\u8fc7 ssh-agent \u907f\u514d\u9891\u7e41\u8f93\u5165\u79c1\u94a5\u53e3\u4ee4\uff0c\u4f46\u8c28\u614e\u4f7f\u7528 agent forwarding\uff0c\u907f\u514d\u4e2d\u95f4\u4e3b\u673a\u6cc4\u9732\u79c1\u94a5\u7b7e\u540d\u80fd\u529b\u3002<\/li>\n<\/ul>\n<h2>\u516c\u94a5\u767b\u5f55\u7684\u5e94\u7528\u573a\u666f<\/h2>\n<p>\u516c\u94a5\u8ba4\u8bc1\u4e0d\u4ec5\u9002\u7528\u4e8e\u4e2a\u4eba\u767b\u5f55\uff0c\u8fd8\u5e7f\u6cdb\u7528\u4e8e\u81ea\u52a8\u5316\u3001CI\/CD\u3001\u5206\u5e03\u5f0f\u8fd0\u7ef4\u7b49\u573a\u666f\uff1a<\/p>\n<h3>\u81ea\u52a8\u5316\u811a\u672c\u4e0e\u90e8\u7f72<\/h3>\n<ul>\n<li>CI\/CD \u7cfb\u7edf\uff08\u5982 Jenkins\u3001GitLab Runner\uff09\u4f7f\u7528\u4e13\u7528\u5bc6\u94a5\u4e0e\u6700\u5c0f\u6743\u9650\u8d26\u53f7\u8fdb\u884c\u4ee3\u7801\u90e8\u7f72\u3002<\/li>\n<li>\u6279\u91cf\u8fd0\u7ef4\u5de5\u5177\uff08Ansible, Fabric\uff09\u901a\u8fc7\u5bc6\u94a5\u65e0\u5bc6\u7801\u6267\u884c\u6279\u91cf\u547d\u4ee4\u6216\u63a8\u9001\u914d\u7f6e\u3002<\/li>\n<\/ul>\n<h3>\u591a\u5c42\u8df3\u677f\u4e0e\u5821\u5792\u673a<\/h3>\n<ul>\n<li>\u5728\u590d\u6742\u7f51\u7edc\u4e2d\uff0c\u91c7\u7528\u8df3\u677f\u673a\uff08Jump Host\uff09\u6a21\u5f0f\uff0c\u7528\u79c1\u94a5\u5728\u672c\u5730\u767b\u5f55\u8df3\u677f\uff0c\u518d\u5230\u76ee\u6807\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\u3002\u5efa\u8bae\u5728\u8df3\u677f\u673a\u4e0a\u4f7f\u7528 <strong>ProxyJump<\/strong> \u6216 OpenSSH \u7684 ProxyCommand\uff0c\u5e76\u5bf9\u8df3\u677f\u673a\u8fdb\u884c\u4e25\u683c\u5ba1\u8ba1\u3002<\/li>\n<\/ul>\n<h2>\u5bc6\u94a5\u7ba1\u7406\u4e0e\u8fd0\u7ef4\u5efa\u8bae<\/h2>\n<p>\u5bc6\u94a5\u7ba1\u7406\u662f\u957f\u671f\u8fd0\u7ef4\u7684\u6838\u5fc3\uff0c\u597d\u7684\u6d41\u7a0b\u53ef\u4ee5\u964d\u4f4e\u6cc4\u9732\u98ce\u9669\u5e76\u63d0\u5347\u5408\u89c4\u6027\u3002<\/p>\n<h3>\u5468\u671f\u6027\u8f6e\u6362\u4e0e\u64a4\u9500<\/h3>\n<ul>\n<li>\u5b9a\u671f\u8f6e\u6362\u5bc6\u94a5\u3001\u64a4\u9500\u4e0d\u518d\u4f7f\u7528\u7684\u516c\u94a5\uff0c\u5c24\u5176\u662f\u4eba\u5458\u53d8\u52a8\u65f6\u5e94\u7acb\u5373\u79fb\u9664\u5176\u516c\u94a5\u3002<\/li>\n<li>\u7ef4\u62a4\u4e2d\u5fc3\u5316\u7684\u516c\u94a5\u6e05\u5355\u6216\u4f7f\u7528\u914d\u7f6e\u7ba1\u7406\u5de5\u5177\u4e0b\u53d1\/\u64a4\u56de authorized_keys\u3002<\/li>\n<\/ul>\n<h3>\u79c1\u94a5\u5907\u4efd\u4e0e\u4fdd\u62a4<\/h3>\n<ul>\n<li>\u79c1\u94a5\u5e94\u4fdd\u5b58\u5728\u53d7\u63a7\u8bbe\u5907\u4e0a\uff0c\u542f\u7528\u53e3\u4ee4\u4fdd\u62a4\uff0c\u5e76\u4f7f\u7528\u5b89\u5168\u5bc6\u7801\u7ba1\u7406\u5668\u6216\u786c\u4ef6\u5b89\u5168\u6a21\u5757\uff08YubiKey, HSM\uff09\u5b58\u50a8\u5173\u952e\u79c1\u94a5\u3002<\/li>\n<li>\u4e0d\u8981\u5c06\u79c1\u94a5\u653e\u5728\u516c\u5171\u4e91\u5b58\u50a8\u3001\u90ae\u4ef6\u6216\u6613\u88ab\u8bbf\u95ee\u7684\u4f4d\u7f6e\u3002<\/li>\n<\/ul>\n<h3>\u5ba1\u8ba1\u4e0e\u65e5\u5fd7<\/h3>\n<ul>\n<li>\u5f00\u542f SSH \u767b\u5f55\u5ba1\u8ba1\u5e76\u96c6\u4e2d\u5316\u65e5\u5fd7\uff08\u5982\u4f7f\u7528 rsyslog\/ELK\/Graylog\uff09\uff0c\u5bf9\u5f02\u5e38\u767b\u5f55\u8fdb\u884c\u544a\u8b66\u3002<\/li>\n<li>\u5bf9\u5173\u952e\u64cd\u4f5c\u91c7\u7528\u4f1a\u8bdd\u5f55\u5236\uff08\u5728\u5821\u5792\u673a\uff09\u4ee5\u4fbf\u4e8b\u540e\u5ba1\u67e5\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u5bc6\u7801\u767b\u5f55 vs SSH \u5bc6\u94a5\u767b\u5f55<\/h2>\n<ul>\n<li><strong>\u5b89\u5168\u6027<\/strong>\uff1a\u5bc6\u94a5\u767b\u5f55\u672c\u8d28\u4e0a\u62b5\u6297\u66b4\u529b\u7834\u89e3\u4e0e\u5b57\u5178\u653b\u51fb\uff0c\u5b89\u5168\u6027\u8fdc\u9ad8\u4e8e\u5bc6\u7801\u767b\u5f55\u3002<\/li>\n<li><strong>\u81ea\u52a8\u5316\u53cb\u597d<\/strong>\uff1a\u5bc6\u94a5\u767b\u5f55\u652f\u6301\u65e0\u4eba\u5de5\u5e72\u9884\u7684\u81ea\u52a8\u90e8\u7f72\uff0c\u4fbf\u4e8e CI\/CD \u4e0e\u8fd0\u7ef4\u811a\u672c\u3002<\/li>\n<li><strong>\u6743\u9650\u7c92\u5ea6<\/strong>\uff1a\u53ef\u4e3a\u4e0d\u540c\u670d\u52a1\u6216\u7528\u6237\u751f\u6210\u5355\u72ec\u5bc6\u94a5\uff0c\u4fbf\u4e8e\u64a4\u9500\u4e0e\u5ba1\u8ba1\u3002<\/li>\n<li><strong>\u7ba1\u7406\u590d\u6742\u5ea6<\/strong>\uff1a\u9700\u8981\u5efa\u7acb\u5bc6\u94a5\u7ba1\u7406\u3001\u8f6e\u6362\u4e0e\u5907\u4efd\u6d41\u7a0b\uff0c\u521d\u671f\u6295\u5165\u9ad8\u4f46\u957f\u671f\u6536\u76ca\u660e\u663e\u3002<\/li>\n<\/ul>\n<h2>\u9009\u8d2d\u5efa\u8bae\uff08\u9488\u5bf9\u9999\u6e2fVPS \u4e0e\u5176\u4ed6\u533a\u57df VPS\uff09<\/h2>\n<p>\u9009\u62e9\u5408\u9002\u7684 VPS 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