{"id":34168,"date":"2026-07-13T15:03:32","date_gmt":"2026-07-13T07:03:32","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/how-to-protect-your-ssh-port-from-scanning\/"},"modified":"2026-07-13T15:11:15","modified_gmt":"2026-07-13T07:11:15","slug":"how-to-protect-your-ssh-port-from-scanning","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/blog\/how-to-protect-your-ssh-port-from-scanning\/","title":{"rendered":"\u5982\u4f55\u4fdd\u62a4SSH\u7aef\u53e3\u514d\u53d7\u626b\u63cf"},"content":{"rendered":"\n<p>\u8981\u9632\u8303<a href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/what-to-do-when-the-server-cannot-connect-to-ssh\/\" target=\"_blank\">SSH\u7aef\u53e3<\/a>\u626b\u63cf\u4e0e\u653b\u51fb\uff0c\u9700\u8981\u642d\u5efa\u5b8c\u5584\u7684\u9632\u62a4\u4f53\u7cfb\u3002\u9996\u5148\u53ef\u5c06SSH\u7aef\u53e3\u4fee\u6539\u4e3a\u975e\u6807\u51c6\u7aef\u53e3\u53f7\uff0c\u901a\u8fc7\u9632\u706b\u5899\u62e6\u622a\u975e\u5fc5\u8981\u8bbf\u95ee\uff0c\u4ec5\u5141\u8bb8\u53d7\u4fe1\u4efb\u7684IP\u5730\u5740\u8fde\u63a5\uff0c\u4e3a\u670d\u52a1\u914d\u7f6e\u5bc6\u94a5\u8ba4\u8bc1\uff0c\u7981\u7528root\u8d26\u6237\u767b\u5f55\uff0c\u5e76\u5f00\u542f\u53cc\u56e0\u7d20\u8ba4\u8bc1\u589e\u5f3a\u9632\u62a4\u3002\u901a\u8fc7\u4ee5\u4e0a\u63aa\u65bd\uff0c\u53ef\u6709\u6548\u63d0\u5347\u5b89\u5168\u6027\u3001\u964d\u4f4e\u5b89\u5168\u98ce\u9669\u3002<\/p>\n<h2>\u9632\u8303SSH\u7aef\u53e3\u626b\u63cf<\/h2>\n<p>\u901a\u8fc7\u63d0\u5347SSH\u670d\u52a1\u7684\u9690\u853d\u6027\u4e0e\u8bbf\u95ee\u95e8\u69db\uff0c\u53ef\u964d\u4f4e\u7aef\u53e3\u626b\u63cf\u5e26\u6765\u7684\u98ce\u9669\u3002\u653b\u51fb\u8005\u901a\u5e38\u4f7f\u7528\u81ea\u52a8\u5316\u5de5\u5177\u626b\u63cf\u7f51\u7edc\u4e2d\u7684\u5f00\u653e\u7aef\u53e3\uff0c\u82e5\u91c7\u53d6\u63aa\u65bd\u9690\u85cf\u6216\u4fdd\u62a4\u7aef\u53e3\uff0c\u5c06\u5927\u5e45\u63d0\u5347\u8fd9\u7c7b\u5de5\u5177\u53d1\u73b0<a href=\"https:\/\/www.varidata.com\/zh-cn\/server\/tokyo\/\" target=\"_blank\">\u670d\u52a1\u5668<\/a>\u7684\u96be\u5ea6\u3002\u4ee5\u4e0b\u662f\u4e09\u79cd\u53ef\u7acb\u5373\u843d\u5730\u7684\u6709\u6548\u65b9\u6848\u3002<\/p>\n<h3>\u4fee\u6539SSH\u7aef\u53e3<\/h3>\n<p>\u7edd\u5927\u591a\u6570\u653b\u51fb\u8005\u90fd\u4f1a\u9488\u5bf922\u7aef\u53e3\u63a2\u6d4bSSH\u670d\u52a1\uff0c\u5c06\u670d\u52a1\u8fc1\u79fb\u81f3\u5176\u4ed6\u7aef\u53e3\u53ef\u89c4\u907f\u5927\u91cf\u81ea\u52a8\u5316\u626b\u63cf\u3002\u8fd9\u9879\u7b80\u5355\u7684\u4fee\u6539\u867d\u65e0\u6cd5\u963b\u6321\u9488\u5bf9\u6027\u7684\u5b9a\u5411\u653b\u51fb\uff0c\u4f46\u80fd\u62e6\u622a\u7edd\u5927\u591a\u6570\u57fa\u7840\u7aef\u53e3\u626b\u63cf\u5c1d\u8bd5\u3002<\/p>\n<p><strong>\u7aef\u53e3\u4fee\u6539\u6b65\u9aa4\uff1a<\/strong><\/p>\n<ol>\n<li>\n<p>\u6253\u5f00SSH\u914d\u7f6e\u6587\u4ef6\u3002 <\/p>\n<pre><code>sudo nano \/etc\/ssh\/sshd_config<\/code><\/pre>\n<\/li>\n<li>\n<p>\u627e\u5230 <code>Port 22<\/code> \u6240\u5728\u884c\uff0c\u5c06 <code>22<\/code> \u4fee\u6539\u4e3a 1024\u201365535 \u4e4b\u95f4\u7684\u5176\u4ed6\u7aef\u53e3\u53f7\u3002<\/p>\n<\/li>\n<li>\n<p>\u4fdd\u5b58\u6587\u4ef6\u5e76\u9000\u51fa\u3002<\/p>\n<\/li>\n<li>\n<p>\u91cd\u542fSSH\u670d\u52a1\u3002 <\/p>\n<pre><code>sudo systemctl restart sshd<\/code><\/pre>\n<\/li>\n<li>\n<p>\u66f4\u65b0\u9632\u706b\u5899\u89c4\u5219\uff0c\u653e\u884c\u65b0\u7aef\u53e3\u7684\u6d41\u91cf\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528\u65b0\u7aef\u53e3\u8fde\u63a5\u670d\u52a1\u5668\u3002 <\/p>\n<pre><code>ssh -p [new_port] user@your_server_ip<\/code><\/pre>\n<\/li>\n<\/ol>\n<p>\u4fee\u6539\u7aef\u53e3\u5e76\u4e0d\u80fd\u8ba9SSH\u5b8c\u5168\u9690\u8eab\uff0c\u4f46\u8db3\u4ee5\u5e2e\u60a8\u89c4\u907f\u7edd\u5927\u591a\u6570\u81ea\u52a8\u5316\u7aef\u53e3\u626b\u63cf\u3002<\/p>\n<h3>\u4f7f\u7528\u7aef\u53e3\u6572\u95e8\u673a\u5236<\/h3>\n<p>\u7aef\u53e3\u6572\u95e8\uff08Port Knocking\uff09\u53ef\u4e3a\u670d\u52a1\u989d\u5916\u589e\u52a0\u4e00\u5c42\u9632\u62a4\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u7aef\u53e3\u4fdd\u6301\u5173\u95ed\u72b6\u6001\uff0c\u53ea\u6709\u5f53\u60a8\u6309\u7279\u5b9a\u987a\u5e8f\u5411\u4e00\u7ec4\u7aef\u53e3\u53d1\u8d77\u8fde\u63a5\u5c1d\u8bd5\u540e\uff0c\u670d\u52a1\u5668\u624d\u4f1a\u4e3a\u60a8\u5f00\u653eSSH\u7aef\u53e3\u3002<\/p>\n<ul>\n<li>\n<p>\u7aef\u53e3\u6572\u95e8\u8981\u6c42\u60a8\u6309\u6307\u5b9a\u987a\u5e8f\uff0c\u4f9d\u6b21\u5c1d\u8bd5\u8fde\u63a5\u4e00\u7cfb\u5217\u5904\u4e8e\u5173\u95ed\u72b6\u6001\u7684\u7aef\u53e3\u3002<\/p>\n<\/li>\n<li>\n<p>\u5728\u5b8c\u6210\u6b63\u786e\u7684\u6572\u95e8\u5e8f\u5217\u524d\uff0c\u76ee\u6807\u7aef\u53e3\u59cb\u7ec8\u4fdd\u6301\u5173\u95ed\u3002<\/p>\n<\/li>\n<li>\n<p>\u5e38\u89c4\u626b\u63cf\u4e0b\u653b\u51fb\u8005\u65e0\u6cd5\u63a2\u6d4b\u5230\u60a8\u7684\u7aef\u53e3\uff0c\u56e0\u6b64\u65e0\u6cd5\u53d1\u8d77\u653b\u51fb\u3002<\/p>\n<\/li>\n<\/ul>\n<p><strong>\u7aef\u53e3\u6572\u95e8\u914d\u7f6e\u6b65\u9aa4\uff1a<\/strong><\/p>\n<ol>\n<li>\n<p>\u5b89\u88c5\u7aef\u53e3\u6572\u95e8\u5de5\u5177\uff0c\u4f8b\u5982 <code>knockd<\/code>\u3002<\/p>\n<pre><code>sudo apt-get install knockd<\/code><\/pre>\n<\/li>\n<li>\n<p>\u7f16\u8f91 knockd \u914d\u7f6e\u6587\u4ef6\uff0c\u901a\u5e38\u8def\u5f84\u4e3a <code>\/etc\/knockd.conf<\/code>\u3002<\/p>\n<\/li>\n<li>\n<p>\u8bbe\u7f6e\u81ea\u5b9a\u4e49\u7684\u79d8\u5bc6\u7aef\u53e3\u5e8f\u5217\uff0c\u4ee5\u53ca\u89e6\u53d1\u7aef\u53e3\u5f00\u653e\u7684\u6267\u884c\u547d\u4ee4\u3002<\/p>\n<\/li>\n<li>\n<p>\u542f\u52a8 knockd \u670d\u52a1\u3002<\/p>\n<pre><code>sudo systemctl start knockd<\/code><\/pre>\n<\/li>\n<li>\n<p>\u8fde\u63a5\u670d\u52a1\u5668\u524d\uff0c\u901a\u8fc7\u7aef\u53e3\u6572\u95e8\u5ba2\u6237\u7aef\u53d1\u9001\u6572\u95e8\u5e8f\u5217\u3002<\/p>\n<\/li>\n<\/ol>\n<h3>\u90e8\u7f72SSH\u871c\u7f50<\/h3>\n<p>\u871c\u7f50\u4f1a\u4f2a\u88c5\u6210\u771f\u5b9e\u7684SSH\u670d\u52a1\u6765\u8bf1\u6355\u653b\u51fb\u8005\uff0c\u5f53\u6709\u4eba\u5c1d\u8bd5\u8fde\u63a5\u65f6\uff0c\u871c\u7f50\u4f1a\u8bb0\u5f55\u5176\u5168\u90e8\u64cd\u4f5c\u884c\u4e3a\u3002\u60a8\u53ef\u901a\u8fc7\u8fd9\u4e9b\u4fe1\u606f\u8bc6\u522b\u653b\u51fb\u884c\u4e3a\u3001\u638c\u63e1\u5a01\u80c1\u52a8\u5411\u3002<\/p>\n<p><strong>SSH\u871c\u7f50\u90e8\u7f72\u6b65\u9aa4\uff1a<\/strong><\/p>\n<ol>\n<li>\n<p>\u9009\u62e9\u871c\u7f50\u5de5\u5177\uff0c\u4f8b\u5982 <code>Cowrie<\/code> \u6216 <code>Kippo<\/code>\u3002<\/p>\n<\/li>\n<li>\n<p>\u5c06\u871c\u7f50\u5b89\u88c5\u5728\u5f53\u524d\u670d\u52a1\u5668\u6216\u72ec\u7acb\u7684\u8bbe\u5907\u4e0a\u3002<\/p>\n<\/li>\n<li>\n<p>\u914d\u7f6e\u871c\u7f50\u76d1\u542c22\u7aef\u53e3\uff0c\u6216\u5176\u4ed6\u60a8\u60f3\u8981\u76d1\u63a7\u7684\u7aef\u53e3\u3002<\/p>\n<\/li>\n<li>\n<p>\u5c06\u771f\u5b9e\u7684SSH\u670d\u52a1\u8fc1\u79fb\u81f3\u5176\u4ed6\u7aef\u53e3\u3002<\/p>\n<\/li>\n<li>\n<p>\u76d1\u63a7\u871c\u7f50\u65e5\u5fd7\uff0c\u6392\u67e5\u53ef\u7591\u6d3b\u52a8\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u901a\u8fc7\u4fee\u6539\u7aef\u53e3\u3001\u4f7f\u7528\u7aef\u53e3\u6572\u95e8\u4e0e\u90e8\u7f72\u871c\u7f50\uff0c\u53ef\u5927\u5e45\u63d0\u5347\u653b\u51fb\u8005\u7aef\u53e3\u626b\u63cf\u7684\u96be\u5ea6\u3002\u8fd9\u4e9b\u63aa\u65bd\u6709\u52a9\u4e8e\u4fdd\u62a4\u670d\u52a1\u5668\u514d\u53d7\u672a\u6388\u6743\u8bbf\u95ee\uff0c\u4fdd\u969c\u670d\u52a1\u5b89\u5168\u8fd0\u884c\u3002<\/p>\n<h2>\u901a\u8fc7\u9632\u706b\u5899\u9650\u5236SSH\u8bbf\u95ee<\/h2>\n<h3>IP\u767d\u540d\u5355\u653e\u884c\u673a\u5236<\/h3>\n<p>\u4ec5\u5141\u8bb8\u53d7\u4fe1\u4efb\u7684IP\u5730\u5740\u8fde\u63a5\uff0c\u53ef\u663e\u8457\u63d0\u5347\u5b89\u5168\u6c34\u5e73\u3002\u5728\u9632\u706b\u5899\u4e2d\u914d\u7f6e\u4ec5\u63a5\u53d7\u6307\u5b9aIP\u7684\u8fde\u63a5\u8bf7\u6c42\uff0c\u7b49\u540c\u4e8e\u5bf9\u5176\u4ed6\u6240\u6709\u5730\u5740\u5173\u95ed\u8bbf\u95ee\u5165\u53e3\uff0c\u80fd\u5728\u653b\u51fb\u8005\u5230\u8fbe\u767b\u5f55\u9a8c\u8bc1\u73af\u8282\u524d\u5c31\u62e6\u622a\u7edd\u5927\u591a\u6570\u653b\u51fb\u3002<\/p>\n<p>IP\u767d\u540d\u5355\u673a\u5236\u53ef\u5927\u5e45\u51cf\u5c11SSH\u66b4\u529b\u7834\u89e3\u5c1d\u8bd5\u3002\u653b\u51fb\u8005\u901a\u5e38\u4f1a\u626b\u63cf\u5927\u8303\u56f4\u7684\u5730\u5740\u6bb5\uff0c\u4f46\u53ea\u8981\u5176IP\u4e0d\u5728\u767d\u540d\u5355\u5185\uff0c\u9632\u706b\u5899\u5c31\u4f1a\u76f4\u63a5\u62e6\u622a\uff0c\u4ece\u800c\u964d\u4f4e\u672a\u6388\u6743\u8bbf\u95ee\u98ce\u9669\uff0c\u4e3a\u670d\u52a1\u5668\u63d0\u4f9b\u66f4\u53ef\u9760\u7684\u9632\u62a4\u3002<\/p>\n<p>SSH\u8bbf\u95eeIP\u767d\u540d\u5355\u914d\u7f6e\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\n<p>\u786e\u8ba4\u53d7\u4fe1\u4efb\u7684IP\u5730\u5740\uff0c\u4f8b\u5982\u529e\u516c\u7f51\u7edc\u6216\u5bb6\u5ead\u7f51\u7edc\u7684\u516c\u7f51IP\u3002<\/p>\n<\/li>\n<li>\n<p>\u5728\u9632\u706b\u5899\u4e2d\u6dfb\u52a0\u89c4\u5219\uff0c\u4ec5\u5141\u8bb8\u8fd9\u4e9bIP\u7684\u6d41\u91cf\u901a\u8fc7\u3002<\/p>\n<\/li>\n<li>\n<p>\u6d4b\u8bd5\u8fde\u63a5\uff0c\u786e\u8ba4\u4ecd\u53ef\u6b63\u5e38\u8bbf\u95ee\u670d\u52a1\u5668\u3002<\/p>\n<\/li>\n<li>\n<p>\u82e5\u53d7\u4fe1\u4efbIP\u53d1\u751f\u53d8\u52a8\uff0c\u53ca\u65f6\u66f4\u65b0\u767d\u540d\u5355\u5217\u8868\u3002<\/p>\n<\/li>\n<\/ol>\n<blockquote>\n<p>\u63d0\u793a\uff1a\u82e5\u60a8\u7ecf\u5e38\u51fa\u5dee\u6216\u4f7f\u7528\u52a8\u6001IP\uff0c\u53ef\u8003\u8651\u901a\u8fc7VPN\u63a5\u5165\u56fa\u5b9a\u5730\u5740\u540e\u518d\u8fde\u63a5\u670d\u52a1\u5668\u3002<\/p>\n<\/blockquote>\n<h3>\u62e6\u622a\u672a\u6388\u6743\u8bbf\u95ee<\/h3>\n<p>\u5728\u9632\u706b\u5899\u5c42\u9762\u62e6\u622a\u672a\u6388\u6743\u8bbf\u95ee\uff0c\u80fd\u63d0\u4f9b\u9ad8\u5f3a\u5ea6\u7684\u5b89\u5168\u9632\u62a4\uff0c\u5728\u653b\u51fb\u8005\u5c1d\u8bd5\u731c\u6d4b\u5bc6\u7801\u6216\u5bc6\u94a5\u4e4b\u524d\u5c31\u5c06\u5176\u963b\u6321\u5728\u5916\u3002\u76ee\u524d\u4f17\u591a\u4f01\u4e1a\u5747\u91c7\u7528\u8be5\u65b9\u6848\u9632\u8303\u975e\u9884\u671f\u8fde\u63a5\u3002<\/p>\n<p>\u4e0b\u8868\u5c55\u793a\u4e86\u62e6\u622aSSH\u672a\u6388\u6743\u8bbf\u95ee\u5bf9\u5b89\u5168\u6548\u679c\u7684\u63d0\u5347\u4f5c\u7528\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\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u65b9\u6848\u8bf4\u660e<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u9632\u62a4\u6548\u679c<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u901a\u8fc7\u9632\u706b\u5899\u62e6\u622aSSH\u4e0eRDP\u901a\u4fe1<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u672a\u51fa\u73b0\u9488\u5bf9\u670d\u52a1\u5668\u7ba1\u7406\u7aef\u53e3\u7684\u672a\u6388\u6743\u653b\u51fb\u4e8b\u4ef6\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u91c7\u7528Safous\u7279\u6743\u8fdc\u7a0b\u8bbf\u95ee\u65b9\u6848\u5b9e\u73b0\u5b89\u5168\u63a5\u5165<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7a33\u5b9a\u8fd0\u884c\u8d85\u8fc7\u4e00\u5e74\uff0c\u672a\u53d1\u751f\u4efb\u4f55\u672a\u6388\u6743\u653b\u51fb\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u53ef\u5c06\u9632\u706b\u5899\u914d\u7f6e\u4e3a\u4e22\u5f03\u767d\u540d\u5355\u4e4b\u5916\u7684\u6240\u6709\u6d41\u91cf\uff0c\u8fd9\u79cd\u65b9\u6848\u80fd\u8ba9\u670d\u52a1\u5668\u5bf9\u7edd\u5927\u591a\u6570\u653b\u51fb\u8005\u8fd1\u4e4e\u9690\u8eab\uff0c\u6709\u6548\u4fdd\u62a4\u6570\u636e\u5b89\u5168\u3001\u964d\u4f4e\u6570\u636e\u6cc4\u9732\u98ce\u9669\u3002<\/p>\n<h2>\u901a\u8fc7\u8eab\u4efd\u8ba4\u8bc1\u52a0\u56faSSH\u8bbf\u95ee\u5b89\u5168<\/h2>\n<h3>\u7981\u7528root\u8d26\u6237\u767b\u5f55<\/h3>\n<p>\u5e94\u7981\u7528root\u8d26\u6237\u767b\u5f55\uff0c\u4ee5\u9632\u8303\u66b4\u529b\u7834\u89e3\u653b\u51fb\u3002\u653b\u51fb\u8005\u5e38\u5c06root\u8d26\u6237\u4f5c\u4e3a\u653b\u51fb\u76ee\u6807\uff0c\u56e0\u4e3a\u8be5\u8d26\u6237\u62e5\u6709\u670d\u52a1\u5668\u6700\u9ad8\u63a7\u5236\u6743\u3002\u7981\u7528root\u767b\u5f55\u540e\uff0c\u653b\u51fb\u8005\u9700\u8981\u540c\u65f6\u731c\u4e2d\u6709\u6548\u7528\u6237\u540d\u4e0e\u5bc6\u7801\uff0c\u653b\u51fb\u96be\u5ea6\u5927\u5e45\u63d0\u5347\u3002<\/p>\n<ul>\n<li>\n<p>\u7981\u7528root\u767b\u5f55\u53ef\u907f\u514d\u8d26\u6237\u88ab\u76f4\u63a5\u5b9a\u5411\u653b\u51fb\u3002<\/p>\n<\/li>\n<li>\n<p>\u7528\u6237\u5fc5\u987b\u4f7f\u7528\u666e\u901a\u8d26\u6237\u767b\u5f55\uff0c\u63d0\u5347\u653b\u51fb\u590d\u6742\u5ea6\u3002<\/p>\n<\/li>\n<li>\n<p>\u653b\u51fb\u8005\u5982\u9700\u83b7\u53d6\u9ad8\u6743\u9650\u5fc5\u987b\u8fdb\u884c\u63d0\u6743\u64cd\u4f5c\uff0c\u989d\u5916\u589e\u52a0\u4e86\u4e00\u5c42\u5b89\u5168\u5c4f\u969c\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u5728\u670d\u52a1\u5668\u4e0a\u5b89\u5168\u7981\u7528root\u767b\u5f55\u7684\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li>\n<p>\u6267\u884c <code>sudo chmod 600 \/etc\/ssh\/sshd_config<\/code>\uff0c\u4e3aSSH\u914d\u7f6e\u6587\u4ef6\u8bbe\u7f6e\u6b63\u786e\u7684\u6743\u9650\u3002<\/p>\n<\/li>\n<li>\n<p>\u8fd0\u884c <code>sudo sed -i \"s\/#PermitRootLogin yes\/PermitRootLogin no\/\" \/etc\/ssh\/sshd_config<\/code> \u66f4\u65b0\u914d\u7f6e\u9879\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u5b8c\u6210\u4fee\u6539\u540e\uff0c\u91cd\u542fSSH\u670d\u52a1\u4f7f\u914d\u7f6e\u751f\u6548\u3002<\/p>\n<h3>\u5f3a\u5236\u542f\u7528\u5bc6\u94a5\u8ba4\u8bc1<\/h3>\n<p>\u76f8\u6bd4\u5bc6\u7801\u8ba4\u8bc1\uff0c\u5bc6\u94a5\u8ba4\u8bc1\u80fd\u4e3aSSH\u63d0\u4f9b\u66f4\u5f3a\u7684\u5b89\u5168\u4fdd\u969c\u3002\u60a8\u53ef\u751f\u6210\u4e00\u5bf9\u516c\u94a5\u4e0e\u79c1\u94a5\uff0c\u59a5\u5584\u4fdd\u7ba1\u79c1\u94a5\u5e76\u5c06\u516c\u94a5\u4e0a\u4f20\u81f3\u670d\u52a1\u5668\u3002\u5373\u4fbf\u653b\u51fb\u8005\u83b7\u77e5\u7528\u6237\u540d\uff0c\u6ca1\u6709\u79c1\u94a5\u4e5f\u65e0\u6cd5\u767b\u5f55\u7cfb\u7edf\u3002<\/p>\n<p>\u5f3a\u5236\u542f\u7528\u5bc6\u94a5\u8ba4\u8bc1\u7684\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\n<p>\u4f7f\u7528 <code>ssh-keygen<\/code> \u751f\u6210\u5bc6\u94a5\u5bf9\u3002<\/p>\n<\/li>\n<li>\n<p>\u901a\u8fc7 <code>ssh-copy-id user@server<\/code> \u5c06\u516c\u94a5\u590d\u5236\u5230\u670d\u52a1\u5668\u3002<\/p>\n<\/li>\n<li>\n<p>\u7f16\u8f91 <code>\/etc\/ssh\/sshd_config<\/code>\uff0c\u5c06 <code>PasswordAuthentication<\/code> \u8bbe\u7f6e\u4e3a <code>no<\/code>\u3002<\/p>\n<\/li>\n<li>\n<p>\u91cd\u542fSSH\u670d\u52a1\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u6240\u6709\u8d26\u6237\u5747\u5e94\u4f7f\u7528\u5bc6\u94a5\u8ba4\u8bc1\uff0c\u8be5\u65b9\u5f0f\u53ef\u62e6\u622a\u7edd\u5927\u591a\u6570\u66b4\u529b\u7834\u89e3\u653b\u51fb\uff0c\u4fdd\u969c\u8bbf\u95ee\u5b89\u5168\u3002<\/p>\n<h3>\u5f00\u542f\u53cc\u56e0\u7d20\u8ba4\u8bc1\uff082FA\uff09<\/h3>\n<p>\u542f\u7528\u53cc\u56e0\u7d20\u8ba4\u8bc1\uff08\u53c8\u79f0\u591a\u56e0\u7d20\u8ba4\u8bc1\/MFA\uff09\u53ef\u989d\u5916\u589e\u52a0\u4e00\u5c42\u9632\u62a4\u3002\u5f00\u542f2FA\u540e\uff0c\u767b\u5f55\u9700\u8981\u540c\u65f6\u9a8c\u8bc1\u201c\u6240\u77e5\u4fe1\u606f\u201d\uff08\u5bc6\u7801\u6216\u5bc6\u94a5\uff09\u4e0e\u201c\u6240\u6301\u7269\u54c1\u201d\uff08\u9a8c\u8bc1\u7801\u6216\u8ba4\u8bc1\u8bbe\u5907\uff09\u3002<\/p>\n<ul>\n<li>\n<p>2FA\u5728\u5bc6\u7801\u6216SSH\u5bc6\u94a5\u4e4b\u5916\uff0c\u589e\u52a0\u4e86\u989d\u5916\u7684\u9a8c\u8bc1\u73af\u8282\u3002<\/p>\n<\/li>\n<li>\n<p>\u5373\u4fbf\u653b\u51fb\u8005\u83b7\u53d6\u4e86\u60a8\u7684\u5bc6\u94a5\uff0c\u4ecd\u9700\u901a\u8fc7\u7b2c\u4e8c\u91cd\u9a8c\u8bc1\u624d\u80fd\u767b\u5f55\u3002<\/p>\n<\/li>\n<li>\n<p>\u8be5\u65b9\u6848\u53ef\u6709\u6548\u62b5\u5fa1\u591a\u79cd\u51ed\u8bc1\u7a83\u53d6\u653b\u51fb\u3002<\/p>\n<\/li>\n<\/ul>\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\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u8ba4\u8bc1\u65b9\u5f0f<\/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>\u57fa\u4e8e\u65f6\u95f4\u7684\u4e00\u6b21\u6027\u5bc6\u7801\uff08TOTP\uff09<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u751f\u6210\u767b\u5f55\u9a8c\u8bc1\u7801\uff0c\u9700\u914d\u5408\u5bc6\u7801\u7ba1\u7406\u5668\u6216\u8eab\u4efd\u9a8c\u8bc1\u5668App\u4f7f\u7528\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>U2F \/ WebAuthn \u786c\u4ef6\u8ba4\u8bc1\u8bbe\u5907<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u767b\u5f55\u65f6\u9700\u7269\u7406\u89e6\u78b0\u8bbe\u5907\u5b8c\u6210\u5b89\u5168\u8ba4\u8bc1\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u60a8\u53ef\u6839\u636e\u81ea\u8eab\u9700\u6c42\u9009\u62e92FA\u65b9\u6848\uff0c\u4e24\u79cd\u65b9\u5f0f\u90fd\u80fd\u5927\u5e45\u964d\u4f4e\u653b\u51fb\u6210\u529f\u7684\u6982\u7387\u3002<\/p>\n<h3>\u7981\u6b62\u7a7a\u5bc6\u7801\u767b\u5f55<\/h3>\n<p>\u5141\u8bb8SSH\u8d26\u6237\u4f7f\u7528\u7a7a\u5bc6\u7801\u5b58\u5728\u91cd\u5927\u5b89\u5168\u9690\u60a3\uff0c\u4f1a\u8ba9\u7cfb\u7edf\u6781\u6613\u906d\u53d7\u672a\u6388\u6743\u8bbf\u95ee\u4e0e\u66b4\u529b\u7834\u89e3\u653b\u51fb\u3002\u5b89\u5168\u89c4\u8303\u5f3a\u70c8\u5efa\u8bae\u7981\u7528\u7a7a\u5bc6\u7801\uff0c\u4ee5\u63d0\u5347\u7cfb\u7edf\u5b89\u5168\u6027\u3002<\/p>\n<p>\u7981\u6b62\u7a7a\u5bc6\u7801\u7684\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li>\n<p>\u4f7f\u7528Vim\u6253\u5f00 <code>\/etc\/ssh\/sshd_config<\/code> \u6587\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p>\u627e\u5230 PermitEmptyPasswords \u914d\u7f6e\u9879\u6240\u5728\u884c\u3002<\/p>\n<\/li>\n<li>\n<p>\u53d6\u6d88\u8be5\u884c\u6ce8\u91ca\uff0c\u5e76\u5c06\u503c\u8bbe\u7f6e\u4e3a no\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u8fd9\u4e00\u7b80\u5355\u64cd\u4f5c\u53ef\u586b\u8865\u91cd\u5927\u5b89\u5168\u6f0f\u6d1e\uff0c\u4fdd\u969c\u7cfb\u7edf\u7ef4\u6301\u9ad8\u5f3a\u5ea6\u9632\u62a4\u6c34\u5e73\u3002<\/p>\n<h2>\u5f3a\u5316SSH\u52a0\u5bc6\u80fd\u529b<\/h2>\n<p>\u9700\u91c7\u7528\u9ad8\u5f3a\u5ea6\u52a0\u5bc6\u7b97\u6cd5\u4fdd\u969cSSH\u8fde\u63a5\u5b89\u5168\u3002\u653b\u51fb\u8005\u5e38\u5c1d\u8bd5\u7834\u89e3\u5f31\u52a0\u5bc6\u7b97\u6cd5\uff0c\u4f7f\u7528\u5f3a\u52a0\u5bc6\u53ef\u5927\u5e45\u63d0\u5347\u6570\u636e\u7a83\u542c\u4e0e\u51ed\u8bc1\u7a83\u53d6\u7684\u96be\u5ea6\u3002\u5e94\u5b9a\u671f\u68c0\u67e5\u914d\u7f6e\uff0c\u786e\u4fdd\u59cb\u7ec8\u4f7f\u7528\u6700\u4f18\u7684\u52a0\u5bc6\u65b9\u6848\u3002<\/p>\n<h3>\u4f7f\u7528\u9ad8\u5f3a\u5ea6\u52a0\u5bc6\u7b97\u6cd5\u4e0e\u6d88\u606f\u8ba4\u8bc1\u7801<\/h3>\n<p>\u52a0\u5bc6\u7b97\u6cd5\uff08Cipher\uff09\u4e0e\u6d88\u606f\u8ba4\u8bc1\u7801\uff08MAC\uff09\u5171\u540c\u4fdd\u969c\u4f20\u8f93\u6570\u636e\u5b89\u5168\uff1a\u52a0\u5bc6\u7b97\u6cd5\u5bf9\u6570\u636e\u8fdb\u884c\u6df7\u6dc6\uff0c\u9632\u6b62\u5185\u5bb9\u88ab\u7a83\u53d6\u8bfb\u53d6\uff1b\u6d88\u606f\u8ba4\u8bc1\u7801\u5219\u6821\u9a8c\u6570\u636e\u5b8c\u6574\u6027\uff0c\u907f\u514d\u6570\u636e\u5728\u7f51\u7edc\u4f20\u8f93\u4e2d\u88ab\u7be1\u6539\u3002\u4e24\u8005\u5747\u5e94\u9009\u7528\u5f53\u524d\u5f3a\u5ea6\u6700\u9ad8\u7684\u9009\u9879\u3002<\/p>\n<p>\u53ef\u5728SSH\u914d\u7f6e\u6587\u4ef6\u4e2d\u8bbe\u7f6e\u76f8\u5173\u9009\u9879\u3002\u6253\u5f00 <code>\/etc\/ssh\/sshd_config<\/code>\uff0c\u6dfb\u52a0\u6216\u66f4\u65b0\u4ee5\u4e0b\u914d\u7f6e\u884c\uff1a<\/p>\n<pre><code>Ciphers aes256-ctr,aes192-ctr,aes128-ctr\r\nMACs hmac-sha2-256,hmac-sha2-512<\/code><\/pre>\n<p>\u4fdd\u5b58\u6587\u4ef6\u540e\u91cd\u542f\u670d\u52a1\uff0c\u786e\u4fdd\u6bcf\u6b21SSH\u8fde\u63a5\u90fd\u91c7\u7528\u9ad8\u5f3a\u5ea6\u52a0\u5bc6\u3002<\/p>\n<blockquote>\n<p>\u63d0\u793a\uff1a\u6bcf\u6b21\u7cfb\u7edf\u91cd\u5927\u66f4\u65b0\u540e\u90fd\u5e94\u590d\u67e5\u52a0\u5bc6\u914d\u7f6e\uff0c\u884c\u4e1a\u53ef\u80fd\u4f1a\u63a8\u51fa\u65b0\u7684\u52a0\u5bc6\u6807\u51c6\uff0c\u9700\u6301\u7eed\u4fdd\u969c\u52a0\u5bc6\u5f3a\u5ea6\u3002<\/p>\n<\/blockquote>\n<h3>\u8bbe\u7f6eSSH\u767b\u5f55\u6b22\u8fce\u6a2a\u5e45<\/h3>\n<p>\u767b\u5f55\u6a2a\u5e45\u4f1a\u5728\u7528\u6237\u767b\u5f55\u524d\u5c55\u793a\u63d0\u793a\u4fe1\u606f\uff0c\u53ef\u7528\u4e8e\u544a\u77e5\u7528\u6237\u5b89\u5168\u89c4\u8303\uff0c\u6216\u5411\u653b\u51fb\u8005\u660e\u793aSSH\u8bbf\u95ee\u5904\u4e8e\u76d1\u63a7\u72b6\u6001\u3002\u6e05\u6670\u7684\u6a2a\u5e45\u867d\u65e0\u6cd5\u63d0\u5347\u52a0\u5bc6\u5f3a\u5ea6\uff0c\u4f46\u80fd\u660e\u786e\u8bbf\u95ee\u89c4\u5219\uff0c\u5bf9\u90e8\u5206\u653b\u51fb\u8d77\u5230\u9707\u6151\u4f5c\u7528\u3002<\/p>\n<p>\u8bbe\u7f6e\u767b\u5f55\u6a2a\u5e45\u7684\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\n<p>\u521b\u5efa\u5b58\u653e\u6a2a\u5e45\u5185\u5bb9\u7684\u6587\u672c\u6587\u4ef6\uff0c\u4f8b\u5982 <code>\/etc\/ssh\/sshd_banner<\/code>\u3002<\/p>\n<\/li>\n<li>\n<p>\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u884c\uff1a<\/p>\n<pre><code>Banner \/etc\/ssh\/sshd_banner<\/code><\/pre>\n<\/li>\n<li>\n<p>\u91cd\u542fSSH\u670d\u52a1\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u89c4\u8303\u7684\u767b\u5f55\u6a2a\u5e45\u65e2\u80fd\u63d0\u9192\u7528\u6237\u9075\u5b88\u8bbf\u95ee\u89c4\u5219\uff0c\u4e5f\u80fd\u4f53\u73b0\u60a8\u5bf9\u52a0\u5bc6\u5b89\u5168\u4e0eSSH\u9632\u62a4\u7684\u91cd\u89c6\u3002<\/p>\n<h2>SSH\u5b89\u5168\u76d1\u63a7\u4e0e\u66f4\u65b0\u7ef4\u62a4<\/h2>\n<h3>\u5f00\u542fSSH\u65e5\u5fd7\u8bb0\u5f55<\/h3>\n<p>\u9700\u5f00\u542fSSH\u670d\u52a1\u7684\u65e5\u5fd7\u529f\u80fd\uff0c\u8ffd\u8e2a\u6240\u6709\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5c1d\u8bd5\u3002\u65e5\u5fd7\u8bb0\u5f55\u53ef\u6355\u83b7\u5173\u952e\u5b89\u5168\u4e8b\u4ef6\uff0c\u5e2e\u52a9\u5c3d\u65e9\u53d1\u73b0\u5f02\u5e38\u3002\u5f00\u542f\u65e5\u5fd7\u540e\uff0c\u60a8\u53ef\u4ee5\uff1a<\/p>\n<ul>\n<li>\n<p>\u8bb0\u5f55\u6240\u6709\u767b\u5f55\u5c1d\u8bd5\uff0c\u5305\u62ec\u6210\u529f\u4e0e\u5931\u8d25\u7684\u767b\u5f55\u3002<\/p>\n<\/li>\n<li>\n<p>\u8ffd\u8e2a\u53ef\u7591\u884c\u4e3a\uff0c\u4f8b\u5982\u91cd\u590d\u6027\u7684\u5bc6\u7801\u731c\u6d4b\u64cd\u4f5c\u3002<\/p>\n<\/li>\n<li>\n<p>\u4e3a\u5f02\u5e38\u4e8b\u4ef6\u914d\u7f6e\u544a\u8b66\uff0c\u4ee5\u4fbf\u5feb\u901f\u54cd\u5e94\u5904\u7f6e\u3002<\/p>\n<\/li>\n<li>\n<p>\u901a\u8fc7\u6392\u67e5\u672a\u6388\u6743\u64cd\u4f5c\uff0c\u8bc6\u522b\u5165\u4fb5\u5c1d\u8bd5\u3002<\/p>\n<\/li>\n<li>\n<p>\u901a\u8fc7\u5c01\u7981IP\u6216\u66f4\u65b0\u914d\u7f6e\uff0c\u5feb\u901f\u54cd\u5e94\u5b89\u5168\u4e8b\u4ef6\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u786e\u8ba4\u914d\u7f6e\u6587\u4ef6\u4e2d\u7684\u76f8\u5173\u8bbe\u7f6e\u6b63\u786e\uff0c\u5373\u53ef\u542f\u7528\u65e5\u5fd7\u529f\u80fd\u3002\u591a\u6570\u7cfb\u7edf\u9ed8\u8ba4\u5f00\u542fSSH\u6d3b\u52a8\u65e5\u5fd7\uff0c\u4f46\u4ecd\u5efa\u8bae\u68c0\u67e5\u5e76\u8c03\u6574\u914d\u7f6e\uff0c\u4ee5\u83b7\u5f97\u66f4\u5b8c\u5584\u7684\u5b89\u5168\u9632\u62a4\u3002<\/p>\n<h3>\u76d1\u63a7\u53ef\u7591\u6d3b\u52a8<\/h3>\n<p>\u5e94\u5b9a\u671f\u67e5\u9605\u65e5\u5fd7\uff0c\u901a\u8fc7\u98ce\u9669\u5f81\u5146\u63d0\u524d\u62e6\u622a\u653b\u51fb\u3001\u907f\u514d\u635f\u5931\u3002\u91cd\u70b9\u76d1\u63a7\u5185\u5bb9\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\n<p>\u8ba4\u8bc1\u65e5\u5fd7\uff1a\u8bb0\u5f55\u6240\u6709\u767b\u5f55\u5c1d\u8bd5\u7684\u4e3b\u4f53\u4fe1\u606f\u3002<\/p>\n<\/li>\n<li>\n<p>\u8bbf\u95ee\u65e5\u5fd7\uff1a\u6392\u67e5\u5f02\u5e38\u6216\u975e\u9884\u671f\u7684\u8fde\u63a5\u884c\u4e3a\u3002<\/p>\n<\/li>\n<li>\n<p>\u547d\u4ee4\u5386\u53f2\uff1a\u6838\u67e5\u662f\u5426\u6709\u4eba\u6267\u884c\u4e86\u9ad8\u5371\u547d\u4ee4\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u82e5\u53d1\u73b0\u91cd\u590d\u7684\u5931\u8d25\u767b\u5f55\u8bb0\u5f55\u6216\u672a\u77e5\u7528\u6237\uff0c\u5e94\u7acb\u5373\u5c55\u5f00\u8c03\u67e5\uff0c\u5c3d\u65e9\u5904\u7f6e\u53ef\u907f\u514d\u95ee\u9898\u6269\u5927\u3002<\/p>\n<h3>\u4fdd\u6301SSH\u7248\u672c\u66f4\u65b0<\/h3>\n<p>\u5fc5\u987b\u4fdd\u6301\u8f6f\u4ef6\u7248\u672c\u4e3a\u6700\u65b0\u72b6\u6001\uff0c\u7248\u672c\u66f4\u65b0\u4f1a\u4fee\u590d\u5b89\u5168\u6f0f\u6d1e\u5e76\u65b0\u589e\u529f\u80fd\u3002\u653b\u51fb\u8005\u5e38\u9488\u5bf9\u65e7\u7248\u672c\u53d1\u8d77\u653b\u51fb\uff0c\u56e0\u4e3a\u5176\u5b58\u5728\u5df2\u77e5\u5b89\u5168\u7f3a\u9677\u3002\u5e94\u5b9a\u671f\u68c0\u67e5\u66f4\u65b0\u5e76\u5c3d\u5feb\u5b89\u88c5\u5347\u7ea7\u3002<\/p>\n<p>\u53ef\u901a\u8fc7\u7cfb\u7edf\u5305\u7ba1\u7406\u5668\u6267\u884c\u66f4\u65b0\uff0c\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<pre><code>sudo apt-get update\r\nsudo apt-get upgrade openssh-server<\/code><\/pre>\n<p>\u66f4\u65b0\u5b8c\u6210\u540e\uff0c\u590d\u67e5\u914d\u7f6e\u6587\u4ef6\u786e\u4fdd\u8bbe\u7f6e\u4ecd\u51c6\u786e\u6709\u6548\u3002\u4fdd\u6301\u7248\u672c\u66f4\u65b0\u53ef\u8ba9\u670d\u52a1\u5668\u514d\u53d7\u65b0\u578b\u5a01\u80c1\u7684\u4fb5\u5bb3\u3002<\/p>\n<h2>SSH\u8bbf\u95ee\u5b89\u5168\u6700\u4f73\u5b9e\u8df5<\/h2>\n<h3>\u5b9a\u671f\u5b89\u5168\u5ba1\u8ba1<\/h3>\n<p>\u9700\u5b9a\u671f\u5f00\u5c55\u5b89\u5168\u5ba1\u8ba1\uff0c\u4fdd\u969c\u8fd0\u884c\u73af\u5883\u5b89\u5168\u3002\u5ba1\u8ba1\u53ef\u53d1\u73b0\u7cfb\u7edf\u8584\u5f31\u70b9\uff0c\u5728\u88ab\u653b\u51fb\u8005\u5229\u7528\u524d\u5b8c\u6210\u4fee\u590d\u3002\u5e94\u9075\u5faa\u89c4\u8303\u6d41\u7a0b\uff0c\u5168\u9762\u6838\u67e5\u914d\u7f6e\u8bbe\u7f6e\u4e0e\u7528\u6237\u6d3b\u52a8\u3002<\/p>\n<p>\u4e0b\u8868\u5217\u51fa\u4e86\u5b8c\u6574SSH\u5b89\u5168\u5ba1\u8ba1\u7684\u6838\u5fc3\u6b65\u9aa4\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\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u6b65\u9aa4<\/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>1<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u542f\u7528\u5bc6\u94a5\u8ba4\u8bc1\uff0c\u63d0\u5347\u5b89\u5168\u7b49\u7ea7\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>2<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7981\u7528root\u767b\u5f55\uff0c\u9632\u8303\u672a\u6388\u6743\u8bbf\u95ee\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>3<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5f3a\u5236\u4f7f\u7528\u5f3a\u52a0\u5bc6\uff0c\u4fdd\u62a4\u4f20\u8f93\u4e2d\u6570\u636e\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>4<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4fdd\u6301\u7cfb\u7edf\u66f4\u65b0\uff0c\u7f13\u89e3\u6f0f\u6d1e\u98ce\u9669\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>5<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u90e8\u7f72\u591a\u56e0\u7d20\u8ba4\u8bc1\uff0c\u989d\u5916\u589e\u5f3a\u9632\u62a4\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>6<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5f00\u542f\u65e5\u5fd7\u4e0e\u76d1\u63a7\uff0c\u8ffd\u8e2a\u8bbf\u95ee\u4e0e\u53d8\u66f4\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>7<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u843d\u5b9e\u8bbf\u95ee\u63a7\u5236\uff0c\u9650\u5236\u7528\u6237\u6743\u9650\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>8<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e3aSSH\u5bc6\u94a5\u8bbe\u7f6e\u53e3\u4ee4\uff0c\u4fdd\u62a4\u79c1\u94a5\u5b89\u5168\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u8fd8\u5e94\u505a\u597d\u7a7a\u95f2\u8fde\u63a5\u7ba1\u7406\uff0c\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u8bbe\u7f6e <code>ClientAliveInterval<\/code> \u4e0e <code>ClientAliveCountMax<\/code> \u53c2\u6570\uff0c\u81ea\u52a8\u65ad\u5f00\u975e\u6d3b\u8dc3\u4f1a\u8bdd\uff0c\u964d\u4f4e\u672a\u6388\u6743\u8bbf\u95ee\u98ce\u9669\u3002<\/p>\n<blockquote>\n<p>\u63d0\u793a\uff1a\u5efa\u8bae\u6bcf\u5b63\u5ea6\u5b89\u6392\u4e00\u6b21\u5b89\u5168\u5ba1\u8ba1\uff0c\u901a\u8fc7\u590d\u67e5\u65e5\u5fd7\u4e0e\u914d\u7f6e\u53d1\u73b0\u5f02\u5e38\u6d3b\u52a8\u3002<\/p>\n<\/blockquote>\n<h3>\u5b9a\u671f\u6838\u67e5\u7528\u6237\u8d26\u6237<\/h3>\n<p>\u5fc5\u987b\u5b9a\u671f\u6838\u67e5\u7528\u6237\u8d26\u6237\uff0c\u7ef4\u6301SSH\u9ad8\u5b89\u5168\u6c34\u5e73\u3002\u53ca\u65f6\u79fb\u9664\u4e0d\u518d\u9700\u8981\u8bbf\u95ee\u6743\u9650\u7684\u8d26\u6237\uff0c\u6838\u67e5\u6743\u9650\u914d\u7f6e\uff0c\u786e\u4fdd\u7528\u6237\u4ec5\u62e5\u6709\u5fc5\u8981\u7684\u6743\u9650\u3002<\/p>\n<p>\u6574\u7406\u6240\u6709\u62e5\u6709SSH\u8bbf\u95ee\u6743\u9650\u7684\u7528\u6237\u6e05\u5355\uff0c\u6392\u67e5\u5b58\u5728\u5f31\u5bc6\u7801\u6216\u672a\u914d\u7f6e\u5bc6\u94a5\u7684\u8d26\u6237\uff0c\u5e76\u7acb\u5373\u6574\u6539\u6216\u7981\u7528\u76f8\u5173\u8d26\u6237\u3002<\/p>\n<ul>\n<li>\n<p>\u6e05\u7406\u975e\u6d3b\u8dc3\u7528\u6237\u3002<\/p>\n<\/li>\n<li>\n<p>\u9650\u5236\u5404\u8d26\u6237\u7684\u6743\u9650\u8303\u56f4\u3002<\/p>\n<\/li>\n<li>\n<p>\u6240\u6709\u7528\u6237\u5f3a\u5236\u4f7f\u7528\u5bc6\u94a5\u8ba4\u8bc1\u3002<\/p>\n<\/li>\n<li>\n<p>\u6392\u67e5\u7a7a\u5bc6\u7801\u8d26\u6237\u5e76\u5b8c\u6210\u6574\u6539\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u9075\u5faa\u4ee5\u4e0a\u5b9e\u8df5\u53ef\u63d0\u5347SSH\u5b89\u5168\u6c34\u5e73\u3002\u5c06\u5b9a\u671f\u5ba1\u8ba1\u4e0e\u8d26\u6237\u6838\u67e5\u76f8\u7ed3\u5408\uff0c\u662f\u884c\u4e1a\u516c\u8ba4\u7684\u6700\u4f73\u5b9e\u8df5\uff0c\u80fd\u6709\u6548\u4fdd\u62a4\u670d\u52a1\u5668\u514d\u53d7\u5404\u7c7b\u5a01\u80c1\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>\u901a\u8fc7\u4fee\u6539\u9ed8\u8ba4\u7aef\u53e3\u3001\u914d\u7f6e\u9632\u706b\u5899\u3001\u91c7\u7528\u5f3a\u8eab\u4efd\u8ba4\u8bc1\uff0c\u53ef\u6709\u6548\u4fdd\u62a4SSH\u7aef\u53e3\u5b89\u5168\u3002\u8bf7\u5b9a\u671f\u590d\u67e5\u914d\u7f6e\u3001\u66f4\u65b0\u5b89\u5168\u5de5\u5177\uff0c\u4fdd\u6301\u5bf9\u53ef\u7591\u6d3b\u52a8\u7684\u8b66\u60d5\u3002<\/p>\n<ul>\n<li>\n<p>\u4fee\u6539\u670d\u52a1\u7aef\u53e3<\/p>\n<\/li>\n<li>\n<p>\u4ec5\u653e\u884c\u53d7\u4fe1\u4efbIP<\/p>\n<\/li>\n<li>\n<p>\u5f3a\u5236\u542f\u7528\u5bc6\u94a5\u8ba4\u8bc1<\/p>\n<\/li>\n<li>\n<p>\u76d1\u63a7\u65e5\u5fd7\u5e76\u66f4\u65b0\u8f6f\u4ef6<\/p>\n<\/li>\n<\/ul>\n<h2>\u5e38\u89c1\u95ee\u9898<\/h2>\n<h3>\u8fdc\u7a0b\u8bbf\u95ee\u670d\u52a1\u5668\u6700\u5b89\u5168\u7684\u65b9\u5f0f\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u63a8\u8350\u4f7f\u7528\u642d\u914d\u5bc6\u94a5\u8ba4\u8bc1\u7684SSH\u65b9\u5f0f\uff0c\u8be5\u65b9\u6848\u5177\u5907\u6781\u9ad8\u7684\u5b89\u5168\u6027\u3002\u8bf7\u59cb\u7ec8\u59a5\u5584\u4fdd\u7ba1\u79c1\u94a5\uff0c\u5207\u52ff\u5411\u4ed6\u4eba\u6cc4\u9732\u3002<\/p>\n<h3>\u591a\u4e45\u9700\u8981\u66f4\u65b0\u4e00\u6b21SSH\u914d\u7f6e\uff1f<\/h3>\n<p>\u5efa\u8bae\u6bcf\u9694\u6570\u6708\u590d\u67e5\u4e00\u6b21\u914d\u7f6e\uff0c\u5173\u6ce8\u6700\u65b0\u7684\u5b89\u5168\u66f4\u65b0\u4e0e\u884c\u4e1a\u6700\u4f73\u5b9e\u8df5\uff0c\u6309\u9700\u8c03\u6574\u914d\u7f6e\u4ee5\u6301\u7eed\u4fdd\u969c\u5b89\u5168\u3002<\/p>\n<h3>\u53ef\u4ee5\u5728\u516c\u5171Wi-Fi\u73af\u5883\u4e0b\u4f7f\u7528SSH\u5417\uff1f<\/h3>\n<p>\u53ef\u4ee5\u5728\u516c\u5171Wi-Fi\u4e0b\u4f7f\u7528SSH\uff0c\u4f46\u8fde\u63a5\u524d\u52a1\u5fc5\u6838\u9a8c\u670d\u52a1\u5668\u6307\u7eb9\uff0c\u91c7\u7528\u5f3a\u8ba4\u8bc1\u65b9\u5f0f\uff0c\u907f\u514d\u4f7f\u7528root\u8d26\u6237\u767b\u5f55\u3002<\/p>\n<h3>\u53d1\u73b0\u53ef\u7591\u7684SSH\u767b\u5f55\u5c1d\u8bd5\u8be5\u5982\u4f55\u5904\u7406\uff1f<\/h3>\n<p>\u9700\u7acb\u5373\u54cd\u5e94\uff1a\u901a\u8fc7\u9632\u706b\u5899\u5c01\u7981\u53ef\u7591IP\u5730\u5740\uff0c\u4fee\u6539\u8d26\u6237\u5bc6\u7801\uff0c\u5e76\u5168\u9762\u6392\u67e5\u65e5\u5fd7\uff0c\u786e\u8ba4\u662f\u5426\u5b58\u5728\u5176\u4ed6\u98ce\u9669\u8ff9\u8c61\u3002<\/p>\n<h3>\u5982\u4f55\u5224\u65adSSH\u7aef\u53e3\u662f\u5426\u6b63\u5728\u88ab\u626b\u63cf\uff1f<\/h3>\n<p>\u53ef\u67e5\u770b\u670d\u52a1\u5668\u65e5\u5fd7\uff0c\u68c0\u67e5\u662f\u5426\u5b58\u5728\u9488\u5bf9SSH\u7aef\u53e3\u7684\u91cd\u590d\u8fde\u63a5\u5c1d\u8bd5\u3002\u5927\u91cf\u5931\u8d25\u767b\u5f55\u8bb0\u5f55\u6216\u672a\u77e5IP\u5730\u5740\u7684\u8bbf\u95ee\uff0c\u901a\u5e38\u610f\u5473\u7740\u7aef\u53e3\u6b63\u88ab\u626b\u63cf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8981\u9632\u8303SSH\u7aef\u53e3\u626b\u63cf\u4e0e\u653b\u51fb\uff0c\u9700\u8981\u642d\u5efa\u5b8c\u5584\u7684\u9632\u62a4\u4f53\u7cfb\u3002\u9996\u5148\u53ef\u5c06SSH\u7aef\u53e3\u4fee\u6539\u4e3a\u975e\u6807\u51c6\u7aef\u53e3\u53f7\uff0c\u901a\u8fc7\u9632\u706b\u5899\u62e6\u622a\u975e\u5fc5\u8981\u8bbf\u95ee\uff0c\u4ec5\u5141\u8bb8\u53d7\u4fe1\u4efb\u7684IP\u5730\u5740\u8fde\u63a5\uff0c\u4e3a\u670d\u52a1\u914d\u7f6e\u5bc6\u94a5\u8ba4\u8bc1\uff0c\u7981\u7528root\u8d26\u6237\u767b\u5f55\uff0c\u5e76\u5f00\u542f\u53cc\u56e0\u7d20\u8ba4\u8bc1\u589e\u5f3a\u9632\u62a4\u3002\u901a\u8fc7\u4ee5\u4e0a\u63aa\u65bd\uff0c\u53ef\u6709\u6548\u63d0\u5347\u5b89\u5168\u6027\u3001\u964d\u4f4e\u5b89\u5168\u98ce\u9669\u3002 \u9632\u8303SSH\u7aef\u53e3\u626b\u63cf \u901a\u8fc7\u63d0\u5347SSH\u670d\u52a1\u7684\u9690\u853d\u6027\u4e0e\u8bbf\u95ee\u95e8\u69db\uff0c\u53ef\u964d\u4f4e\u7aef\u53e3\u626b\u63cf\u5e26\u6765\u7684\u98ce\u9669\u3002\u653b\u51fb\u8005\u901a\u5e38\u4f7f\u7528\u81ea\u52a8\u5316\u5de5\u5177\u626b\u63cf\u7f51\u7edc\u4e2d\u7684\u5f00\u653e\u7aef\u53e3\uff0c\u82e5\u91c7\u53d6\u63aa\u65bd\u9690\u85cf\u6216\u4fdd\u62a4\u7aef\u53e3\uff0c\u5c06\u5927\u5e45\u63d0\u5347\u8fd9\u7c7b\u5de5\u5177\u53d1\u73b0\u670d\u52a1\u5668\u7684\u96be\u5ea6\u3002\u4ee5\u4e0b\u662f\u4e09\u79cd\u53ef\u7acb\u5373\u843d\u5730\u7684\u6709\u6548\u65b9\u6848\u3002 \u4fee\u6539SSH\u7aef\u53e3 \u7edd\u5927\u591a\u6570\u653b\u51fb\u8005\u90fd\u4f1a\u9488\u5bf922\u7aef\u53e3\u63a2\u6d4bSSH\u670d\u52a1\uff0c\u5c06\u670d\u52a1\u8fc1\u79fb\u81f3\u5176\u4ed6\u7aef\u53e3\u53ef\u89c4\u907f\u5927\u91cf\u81ea\u52a8\u5316\u626b\u63cf\u3002\u8fd9\u9879\u7b80\u5355\u7684\u4fee\u6539\u867d\u65e0\u6cd5\u963b\u6321\u9488\u5bf9\u6027\u7684\u5b9a\u5411\u653b\u51fb\uff0c\u4f46\u80fd\u62e6\u622a\u7edd\u5927\u591a\u6570\u57fa\u7840\u7aef\u53e3\u626b\u63cf\u5c1d\u8bd5\u3002 \u7aef\u53e3\u4fee\u6539\u6b65\u9aa4\uff1a \u6253\u5f00SSH\u914d\u7f6e\u6587\u4ef6\u3002 sudo nano \/etc\/ssh\/sshd_config \u627e\u5230 Port 22 \u6240\u5728\u884c\uff0c\u5c06 22 \u4fee\u6539\u4e3a 1024\u201365535 \u4e4b\u95f4\u7684\u5176\u4ed6\u7aef\u53e3\u53f7\u3002 \u4fdd\u5b58\u6587\u4ef6\u5e76\u9000\u51fa\u3002 \u91cd\u542fSSH\u670d\u52a1\u3002 sudo systemctl restart sshd \u66f4\u65b0\u9632\u706b\u5899\u89c4\u5219\uff0c\u653e\u884c\u65b0\u7aef\u53e3\u7684\u6d41\u91cf\u3002 \u4f7f\u7528\u65b0\u7aef\u53e3\u8fde\u63a5\u670d\u52a1\u5668\u3002 ssh -p [new_port] user@your_server_ip \u4fee\u6539\u7aef\u53e3\u5e76\u4e0d\u80fd\u8ba9SSH\u5b8c\u5168\u9690\u8eab\uff0c\u4f46\u8db3\u4ee5\u5e2e\u60a8\u89c4\u907f\u7edd\u5927\u591a\u6570\u81ea\u52a8\u5316\u7aef\u53e3\u626b\u63cf\u3002 \u4f7f\u7528\u7aef\u53e3\u6572\u95e8\u673a\u5236 \u7aef\u53e3\u6572\u95e8\uff08Port Knocking\uff09\u53ef\u4e3a\u670d\u52a1\u989d\u5916\u589e\u52a0\u4e00\u5c42\u9632\u62a4\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u7aef\u53e3\u4fdd\u6301\u5173\u95ed\u72b6\u6001\uff0c\u53ea\u6709\u5f53\u60a8\u6309\u7279\u5b9a\u987a\u5e8f\u5411\u4e00\u7ec4\u7aef\u53e3\u53d1\u8d77\u8fde\u63a5\u5c1d\u8bd5\u540e\uff0c\u670d\u52a1\u5668\u624d\u4f1a\u4e3a\u60a8\u5f00\u653eSSH\u7aef\u53e3\u3002 \u7aef\u53e3\u6572\u95e8\u8981\u6c42\u60a8\u6309\u6307\u5b9a\u987a\u5e8f\uff0c\u4f9d\u6b21\u5c1d\u8bd5\u8fde\u63a5\u4e00\u7cfb\u5217\u5904\u4e8e\u5173\u95ed\u72b6\u6001\u7684\u7aef\u53e3\u3002 \u5728\u5b8c\u6210\u6b63\u786e\u7684\u6572\u95e8\u5e8f\u5217\u524d\uff0c\u76ee\u6807\u7aef\u53e3\u59cb\u7ec8\u4fdd\u6301\u5173\u95ed\u3002 \u5e38\u89c4\u626b\u63cf\u4e0b\u653b\u51fb\u8005\u65e0\u6cd5\u63a2\u6d4b\u5230\u60a8\u7684\u7aef\u53e3\uff0c\u56e0\u6b64\u65e0\u6cd5\u53d1\u8d77\u653b\u51fb\u3002 \u7aef\u53e3\u6572\u95e8\u914d\u7f6e\u6b65\u9aa4\uff1a \u5b89\u88c5\u7aef\u53e3\u6572\u95e8\u5de5\u5177\uff0c\u4f8b\u5982 knockd\u3002 sudo apt-get install knockd \u7f16\u8f91 knockd \u914d\u7f6e\u6587\u4ef6\uff0c\u901a\u5e38\u8def\u5f84\u4e3a \/etc\/knockd.conf\u3002 \u8bbe\u7f6e\u81ea\u5b9a\u4e49\u7684\u79d8\u5bc6\u7aef\u53e3\u5e8f\u5217\uff0c\u4ee5\u53ca\u89e6\u53d1\u7aef\u53e3\u5f00\u653e\u7684\u6267\u884c\u547d\u4ee4\u3002 \u542f\u52a8 knockd \u670d\u52a1\u3002 sudo systemctl start [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/how-to-protect-your-ssh-port-from-scanning\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":12,"featured_media":34165,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[76],"tags":[],"class_list":["post-34168","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 v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u5982\u4f55\u4fdd\u62a4SSH\u7aef\u53e3\u514d\u53d7\u626b\u63cf<\/title>\n<meta name=\"description\" content=\"\u901a\u8fc7\u4fee\u6539\u9ed8\u8ba4\u7aef\u53e3\u3001\u914d\u7f6e\u9632\u706b\u5899\u5e76\u6267\u884c\u5f3a\u8eab\u4efd\u9a8c\u8bc1\uff0c\u4fdd\u62a4\u60a8\u7684\u670d\u52a1\u5668\u514d\u53d7SSH\u7aef\u53e3\u626b\u63cf\u653b\u51fb\uff0c\u5b9e\u73b0\u5b89\u5168\u7684SSH\u8bbf\u95ee\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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