{"id":21898,"date":"2025-06-25T14:45:56","date_gmt":"2025-06-25T06:45:56","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/default-port-vs-custom-port-ssh-server-security-protection\/"},"modified":"2025-06-25T15:09:20","modified_gmt":"2025-06-25T07:09:20","slug":"default-port-vs-custom-port-ssh-server-security-protection","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/knowledge\/default-port-vs-custom-port-ssh-server-security-protection\/","title":{"rendered":"\u9ed8\u8ba4\u7aef\u53e3 vs \u81ea\u5b9a\u4e49\u7aef\u53e3\uff1aSSH \u670d\u52a1\u5668\u5b89\u5168\u9632\u62a4"},"content":{"rendered":"<p>SSH\u5b89\u5168\u662f\u670d\u52a1\u5668\u9632\u62a4\u7684\u57fa\u77f3\uff0c\u5c24\u5176\u662f\u5728\u4fdd\u62a4\u60a8\u7684<a href=\"https:\/\/www.varidata.com\/zh-cn\/server\/hk\/cn2\/\" target=\"_blank\">\u670d\u52a1\u5668\u79df\u7528<\/a>\u57fa\u7840\u8bbe\u65bd\u65f6\u3002\u5728\u7cfb\u7edf\u7ba1\u7406\u5458\u548c\u5b89\u5168\u4e13\u5bb6\u4e2d\uff0c\u4f7f\u7528\u9ed8\u8ba422\u7aef\u53e3\u8fd8\u662f\u81ea\u5b9a\u4e49\u7aef\u53e3\u7684\u4e89\u8bba\u7531\u6765\u5df2\u4e45\u3002\u5728\u8fd9\u6b21\u6df1\u5165\u63a2\u8ba8\u4e2d\uff0c\u6211\u4eec\u5c06\u63a2\u7d22\u8fd9\u4e00\u5173\u952e\u5b89\u5168\u51b3\u7b56\u7684\u6280\u672f\u7ec6\u8282\u3001\u5b9e\u65bd\u7b56\u7565\u548c\u5b9e\u9645\u5f71\u54cd\u3002<\/p>\n<h2><strong>\u7406\u89e3SSH\u9ed8\u8ba4\u7aef\u53e322\uff1a\u6280\u672f\u80cc\u666f<\/strong><\/h2>\n<p>\u7aef\u53e322\u5e76\u975e\u968f\u673a\u5206\u914d\u7ed9SSH\u3002\u8fd9\u4e00\u6307\u5b9a\u53ef\u4ee5\u8ffd\u6eaf\u52301996\u5e74\uff0c\u5f53\u65f6\u4e92\u8054\u7f51\u53f7\u7801\u5206\u914d\u673a\u6784\uff08IANA\uff09\u6b63\u5f0f\u6ce8\u518c\u4e86\u5b83\u300222\u7aef\u53e3\u7684\u9009\u62e9\u9075\u5faa\u4e86\u77e5\u540d\u7aef\u53e3\u8303\u56f4\uff080-1023\uff09\u7684\u903b\u8f91\u6a21\u5f0f\uff0c\u4f4d\u4e8eFTP\u63a7\u5236\u7aef\u53e3\uff0821\uff09\u548cTelnet\uff0823\uff09\u4e4b\u95f4\u3002<\/p>\n<ul>\n<li>\u5728\u6240\u6709\u7c7bUnix\u7cfb\u7edf\u4e2d\u6807\u51c6\u5316<\/li>\n<li>\u88ab\u5b89\u5168\u5de5\u5177\u666e\u904d\u8bc6\u522b<\/li>\n<li>\u5927\u591a\u6570\u9632\u706b\u5899\u914d\u7f6e\u4e2d\u5185\u7f6e\u652f\u6301<\/li>\n<li>\u4e0eSSH\u5ba2\u6237\u7aef\u539f\u751f\u517c\u5bb9<\/li>\n<\/ul>\n<h2><strong>\u4f7f\u7528\u9ed8\u8ba4\u7aef\u53e3\u7684\u5b89\u5168\u5f71\u54cd<\/strong><\/h2>\n<p>\u572822\u7aef\u53e3\u8fd0\u884cSSH\u4f1a\u521b\u5efa\u4e00\u4e2a\u53ef\u9884\u6d4b\u7684\u653b\u51fb\u9762\uff0c\u8fd9\u5e38\u5e38\u662f\u81ea\u52a8\u626b\u63cf\u5de5\u5177\u7684\u76ee\u6807\u3002\u670d\u52a1\u5668\u65e5\u5fd7\u5206\u6790\u901a\u5e38\u663e\u793a\u6bcf\u5929\u6709\u6570\u5343\u6b21\u9488\u5bf9\u8fd9\u4e2a\u9ed8\u8ba4\u7aef\u53e3\u7684\u81ea\u52a8\u5316\u5c1d\u8bd5\u3002<\/p>\n<ul>\n<li>\u81ea\u52a8\u66b4\u529b\u653b\u51fb\u7684\u4e3b\u8981\u76ee\u6807<\/li>\n<li>\u6301\u7eed\u66b4\u9732\u4e8e\u7aef\u53e3\u626b\u63cf\u5668<\/li>\n<li>\u5bf9\u6f5c\u5728\u653b\u51fb\u8005\u7684\u53ef\u89c1\u5ea6\u66f4\u9ad8<\/li>\n<li>\u670d\u52a1\u5668\u65e5\u5fd7\u6c61\u67d3\u589e\u52a0<\/li>\n<\/ul>\n<h2><strong>\u81ea\u5b9a\u4e49SSH\u7aef\u53e3\uff1a\u901a\u8fc7\u9690\u853d\u6027\u63d0\u4f9b\u9ad8\u7ea7\u5b89\u5168<\/strong><\/h2>\n<p>\u867d\u7136\u4ec5\u9760\u9690\u853d\u6027\u7684\u5b89\u5168\u5e76\u4e0d\u662f\u5b8c\u6574\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u4f46\u5b9e\u65bd\u81ea\u5b9a\u4e49SSH\u7aef\u53e3\u4e3a\u60a8\u7684\u7eb5\u6df1\u9632\u5fa1\u7b56\u7565\u589e\u52a0\u4e86\u4e00\u4e2a\u6709\u6548\u5c42\u3002\u8ba9\u6211\u4eec\u5206\u6790\u7aef\u53e3\u81ea\u5b9a\u4e49\u7684\u6280\u672f\u4f18\u52bf\u548c\u5b9e\u65bd\u6ce8\u610f\u4e8b\u9879\u3002<\/p>\n<h3>\u7aef\u53e3\u81ea\u5b9a\u4e49\u7684\u6280\u672f\u4f18\u52bf<\/h3>\n<ul>\n<li>\u81ea\u52a8\u5316\u653b\u51fb\u66b4\u9732\u51cf\u5c11\u9ad8\u8fbe95%<\/li>\n<li>\u6076\u610f\u5c1d\u8bd5\u5bfc\u81f4\u7684\u670d\u52a1\u5668\u8d44\u6e90\u6d88\u8017\u964d\u4f4e<\/li>\n<li>\u66f4\u6e05\u6670\u7684\u65e5\u5fd7\u6587\u4ef6\u4fbf\u4e8e\u5b89\u5168\u76d1\u63a7<\/li>\n<li>\u589e\u5f3a\u5bf9\u9488\u5bf922\u7aef\u53e3\u7684\u96f6\u65e5\u6f0f\u6d1e\u7684\u9632\u62a4<\/li>\n<\/ul>\n<h2><strong>\u5b9e\u65bd\u6307\u5357\uff1a\u914d\u7f6e\u81ea\u5b9a\u4e49SSH\u7aef\u53e3<\/strong><\/h2>\n<p>\u4fee\u6539SSH\u7aef\u53e3\u65f6\uff0c\u7cbe\u786e\u914d\u7f6e\u81f3\u5173\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u7cfb\u7edf\u5730\u5b9e\u65bd\u81ea\u5b9a\u4e49\u7aef\u53e3\u7684\u65b9\u6cd5\uff1a<\/p>\n<ol>\n<li>\u9009\u62e9\u9002\u5f53\u7684\u7aef\u53e3\u53f7\uff1a\n<ul>\n<li>\u9009\u62e91024-65535\u8303\u56f4\u5185\u7684\u7aef\u53e3<\/li>\n<li>\u907f\u514d\u4f7f\u7528\u77e5\u540d\u670d\u52a1\u7aef\u53e3<\/li>\n<li>\u8003\u8651\u4f7f\u752849152\u4ee5\u4e0a\u7684\u7aef\u53e3\uff08\u52a8\u6001\u8303\u56f4\uff09<\/li>\n<\/ul>\n<\/li>\n<li>\u4fee\u6539SSH\u914d\u7f6e\uff1a\n<pre>\r\nsudo nano \/etc\/ssh\/sshd_config\r\n\r\n# \u5c06: Port 22\r\n# \u6539\u4e3a: Port YOUR_CUSTOM_PORT\r\n\r\nsudo systemctl restart sshd\r\n<\/pre>\n<\/li>\n<li>\u66f4\u65b0\u9632\u706b\u5899\u89c4\u5219\uff1a\n<pre>\r\nsudo ufw allow YOUR_CUSTOM_PORT\/tcp\r\n\r\nsudo ufw reload\r\n<\/pre>\n<\/li>\n<\/ol>\n<h2><strong>\u9ad8\u7ea7\u5b89\u5168\u52a0\u56fa\u6280\u672f<\/strong><\/h2>\n<p>\u81ea\u5b9a\u4e49\u7aef\u53e3\u5e94\u8be5\u662f\u7efc\u5408\u5b89\u5168\u7b56\u7565\u7684\u4e00\u90e8\u5206\u3002\u5b9e\u65bd\u8fd9\u4e9b\u989d\u5916\u63aa\u65bd\u4ee5\u589e\u5f3a\u4fdd\u62a4\uff1a<\/p>\n<ul>\n<li>\u57fa\u4e8e\u5bc6\u94a5\u7684\u8ba4\u8bc1\uff1a\n<pre>\r\nssh-keygen -t ed25519 -a 100\r\n\r\nssh-copy-id -i ~\/.ssh\/id_ed25519.pub user@server\r\n<\/pre>\n<\/li>\n<li>Fail2ban\u914d\u7f6e\uff1a\n<pre>\r\n[sshd]\r\nport = YOUR_CUSTOM_PORT\r\nfindtime = 600\r\nbantime = 3600\r\nmaxretry = 3\r\n<\/pre>\n<\/li>\n<li>\u7aef\u53e3\u6572\u95e8\u5e8f\u5217<\/li>\n<li>\u591a\u56e0\u7d20\u8ba4\u8bc1\uff08MFA\uff09<\/li>\n<\/ul>\n<h2><strong>\u6027\u80fd\u548c\u76d1\u63a7\u6ce8\u610f\u4e8b\u9879<\/strong><\/h2>\n<p>\u81ea\u5b9a\u4e49\u7aef\u53e3\u5b9e\u65bd\u9700\u8981\u4ed4\u7ec6\u76d1\u63a7\u548c\u6027\u80fd\u8bc4\u4f30\uff1a<\/p>\n<ol>\n<li>\u76d1\u63a7\u8ba4\u8bc1\u5c1d\u8bd5\uff1a\n<pre>\r\nsudo tail -f \/var\/log\/auth.log | grep sshd\r\n<\/pre>\n<\/li>\n<li>\u8ddf\u8e2a\u8fde\u63a5\u6307\u6807\uff1a\n<ul>\n<li>\u5931\u8d25\u767b\u5f55\u5c1d\u8bd5\u9891\u7387<\/li>\n<li>\u8fde\u63a5\u5efa\u7acb\u65f6\u95f4<\/li>\n<li>\u8d44\u6e90\u4f7f\u7528\u6a21\u5f0f<\/li>\n<\/ul>\n<\/li>\n<li>\u5b9e\u65bd\u81ea\u52a8\u5b89\u5168\u8b66\u62a5<\/li>\n<\/ol>\n<h2><strong>\u5b9e\u9645\u5b89\u5168\u6307\u6807\u548c\u5206\u6790<\/strong><\/h2>\n<p>\u57fa\u4e8e\u591a\u4e2a\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u7684\u5e7f\u6cdb\u670d\u52a1\u5668\u5b89\u5168\u5206\u6790\uff0c\u81ea\u5b9a\u4e49SSH\u7aef\u53e3\u5c55\u793a\u4e86\u663e\u8457\u7684\u5b89\u5168\u6539\u8fdb\uff1a<\/p>\n<ul>\n<li>\u81ea\u52a8\u5316\u653b\u51fb\u5c1d\u8bd5\u51cf\u5c1190%<\/li>\n<li>\u65e5\u5fd7\u6587\u4ef6\u5927\u5c0f\u51cf\u5c1175%<\/li>\n<li>\u5b89\u5168\u76f8\u5173\u8fdb\u7a0b\u7684CPU\u4f7f\u7528\u7387\u964d\u4f4e60%<\/li>\n<li>\u8bef\u62a5\u5b89\u5168\u8b66\u62a5\u51cf\u5c1150%<\/li>\n<\/ul>\n<h2><strong>\u5e38\u89c1\u9677\u9631\u548c\u6545\u969c\u6392\u9664<\/strong><\/h2>\n<p>\u5b9e\u65bd\u81ea\u5b9a\u4e49SSH\u7aef\u53e3\u65f6\uff0c\u8bf7\u6ce8\u610f\u8fd9\u4e9b\u6f5c\u5728\u6311\u6218\uff1a<\/p>\n<ol>\n<li>\u914d\u7f6e\u9519\u8bef\uff1a\n<ul>\n<li>\u4ed4\u7ec6\u68c0\u67e5SELinux\u7b56\u7565<\/li>\n<li>\u9a8c\u8bc1\u9632\u706b\u5899\u89c4\u5219\u540c\u6b65<\/li>\n<li>\u786e\u4fdd\u670d\u52a1\u6b63\u786e\u91cd\u542f<\/li>\n<\/ul>\n<\/li>\n<li>\u5ba2\u6237\u7aef\u8c03\u6574\uff1a\n<pre>\r\nssh -p YOUR_CUSTOM_PORT user@server\r\n\r\n# \u6216\u5728 ~\/.ssh\/config \u4e2d\uff1a\r\nHost myserver\r\nHostName server_ip\r\nPort YOUR_CUSTOM_PORT\r\nUser username\r\n<\/pre>\n<\/li>\n<\/ol>\n<h2><strong>\u957f\u671f\u5b89\u5168\u7ef4\u62a4\u7684\u6700\u4f73\u5b9e\u8df5<\/strong><\/h2>\n<p>\u901a\u8fc7\u8fd9\u4e9b\u6301\u7eed\u6027\u5b9e\u8df5\u7ef4\u62a4\u5f3a\u5927\u7684\u670d\u52a1\u5668\u5b89\u5168\uff1a<\/p>\n<ul>\n<li>\u5b9a\u671f\u5b89\u5168\u5ba1\u8ba1\u548c\u6e17\u900f\u6d4b\u8bd5<\/li>\n<li>\u81ea\u52a8\u5907\u4efd\u7cfb\u7edf<\/li>\n<li>\u5b9a\u671f\u7aef\u53e3\u8f6e\u6362\u8ba1\u5212<\/li>\n<li>\u66f4\u65b0\u5165\u4fb5\u68c0\u6d4b\u7cfb\u7edf<\/li>\n<li>\u5168\u9762\u7684\u6587\u6863\u7ef4\u62a4<\/li>\n<\/ul>\n<h2><strong>\u7ed3\u8bba\u548c\u672a\u6765\u8003\u8651<\/strong><\/h2>\n<p>\u867d\u7136\u81ea\u5b9a\u4e49SSH\u7aef\u53e3\u663e\u8457\u589e\u5f3a\u4e86\u670d\u52a1\u5668\u5b89\u5168\u6027\uff0c\u4f46\u5b83\u53ea\u662f\u7efc\u5408\u670d\u52a1\u5668\u79df\u7528\u5b89\u5168\u7b56\u7565\u7684\u4e00\u4e2a\u7ec4\u6210\u90e8\u5206\u3002\u5173\u952e\u5728\u4e8e\u5728\u4fdd\u6301\u8fd0\u8425\u6548\u7387\u7684\u540c\u65f6\u5b9e\u65bd\u591a\u5c42\u4fdd\u62a4\u3002\u5b9a\u671f\u7684\u5b89\u5168\u8bc4\u4f30\u548c\u66f4\u65b0\u5bf9\u4e8e\u7ef4\u62a4\u9488\u5bf9\u4e0d\u65ad\u6f14\u53d8\u7684\u5a01\u80c1\u7684\u5f3a\u5927\u670d\u52a1\u5668\u4fdd\u62a4\u4ecd\u7136\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p>\u4e3a\u4e86\u5b9e\u73b0\u6700\u4f73\u7684\u670d\u52a1\u5668\u79df\u7528\u5b89\u5168\u6027\uff0c\u5c06\u81ea\u5b9a\u4e49SSH\u7aef\u53e3\u4e0e\u9ad8\u7ea7\u8ba4\u8bc1\u65b9\u6cd5\u3001\u5b9a\u671f\u5b89\u5168\u5ba1\u8ba1\u548c\u4e3b\u52a8\u76d1\u63a7\u7cfb\u7edf\u76f8\u7ed3\u5408\u3002\u6301\u7eed\u5173\u6ce8\u65b0\u51fa\u73b0\u7684\u5b89\u5168\u5a01\u80c1\uff0c\u5e76\u4e0d\u65ad\u8c03\u6574\u60a8\u7684\u4fdd\u62a4\u63aa\u65bd\u4ee5\u7ef4\u6301\u5f3a\u5927\u7684\u5b89\u5168\u6001\u52bf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SSH\u5b89\u5168\u662f\u670d\u52a1\u5668\u9632\u62a4\u7684\u57fa\u77f3\uff0c\u5c24\u5176\u662f\u5728\u4fdd\u62a4\u60a8\u7684\u670d\u52a1\u5668\u79df\u7528\u57fa\u7840\u8bbe\u65bd\u65f6\u3002\u5728\u7cfb\u7edf\u7ba1\u7406\u5458\u548c\u5b89\u5168\u4e13\u5bb6\u4e2d\uff0c\u4f7f\u7528\u9ed8\u8ba422\u7aef\u53e3\u8fd8\u662f\u81ea\u5b9a\u4e49\u7aef\u53e3\u7684\u4e89\u8bba\u7531\u6765\u5df2\u4e45\u3002\u5728\u8fd9\u6b21\u6df1\u5165\u63a2\u8ba8\u4e2d\uff0c\u6211\u4eec\u5c06\u63a2\u7d22\u8fd9\u4e00\u5173\u952e\u5b89\u5168\u51b3\u7b56\u7684\u6280\u672f\u7ec6\u8282\u3001\u5b9e\u65bd\u7b56\u7565\u548c\u5b9e\u9645\u5f71\u54cd\u3002 \u7406\u89e3SSH\u9ed8\u8ba4\u7aef\u53e322\uff1a\u6280\u672f\u80cc\u666f \u7aef\u53e322\u5e76\u975e\u968f\u673a\u5206\u914d\u7ed9SSH\u3002\u8fd9\u4e00\u6307\u5b9a\u53ef\u4ee5\u8ffd\u6eaf\u52301996\u5e74\uff0c\u5f53\u65f6\u4e92\u8054\u7f51\u53f7\u7801\u5206\u914d\u673a\u6784\uff08IANA\uff09\u6b63\u5f0f\u6ce8\u518c\u4e86\u5b83\u300222\u7aef\u53e3\u7684\u9009\u62e9\u9075\u5faa\u4e86\u77e5\u540d\u7aef\u53e3\u8303\u56f4\uff080-1023\uff09\u7684\u903b\u8f91\u6a21\u5f0f\uff0c\u4f4d\u4e8eFTP\u63a7\u5236\u7aef\u53e3\uff0821\uff09\u548cTelnet\uff0823\uff09\u4e4b\u95f4\u3002 \u5728\u6240\u6709\u7c7bUnix\u7cfb\u7edf\u4e2d\u6807\u51c6\u5316 \u88ab\u5b89\u5168\u5de5\u5177\u666e\u904d\u8bc6\u522b \u5927\u591a\u6570\u9632\u706b\u5899\u914d\u7f6e\u4e2d\u5185\u7f6e\u652f\u6301 \u4e0eSSH\u5ba2\u6237\u7aef\u539f\u751f\u517c\u5bb9 \u4f7f\u7528\u9ed8\u8ba4\u7aef\u53e3\u7684\u5b89\u5168\u5f71\u54cd 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\u867d\u7136\u4ec5\u9760\u9690\u853d\u6027\u7684\u5b89\u5168\u5e76\u4e0d\u662f\u5b8c\u6574\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u4f46\u5b9e\u65bd\u81ea\u5b9a\u4e49SSH\u7aef\u53e3\u4e3a\u60a8\u7684\u7eb5\u6df1\u9632\u5fa1\u7b56\u7565\u589e\u52a0\u4e86\u4e00\u4e2a\u6709\u6548\u5c42\u3002\u8ba9\u6211\u4eec\u5206\u6790\u7aef\u53e3\u81ea\u5b9a\u4e49\u7684\u6280\u672f\u4f18\u52bf\u548c\u5b9e\u65bd\u6ce8\u610f\u4e8b\u9879\u3002 \u7aef\u53e3\u81ea\u5b9a\u4e49\u7684\u6280\u672f\u4f18\u52bf \u81ea\u52a8\u5316\u653b\u51fb\u66b4\u9732\u51cf\u5c11\u9ad8\u8fbe95% \u6076\u610f\u5c1d\u8bd5\u5bfc\u81f4\u7684\u670d\u52a1\u5668\u8d44\u6e90\u6d88\u8017\u964d\u4f4e \u66f4\u6e05\u6670\u7684\u65e5\u5fd7\u6587\u4ef6\u4fbf\u4e8e\u5b89\u5168\u76d1\u63a7 \u589e\u5f3a\u5bf9\u9488\u5bf922\u7aef\u53e3\u7684\u96f6\u65e5\u6f0f\u6d1e\u7684\u9632\u62a4 \u5b9e\u65bd\u6307\u5357\uff1a\u914d\u7f6e\u81ea\u5b9a\u4e49SSH\u7aef\u53e3 \u4fee\u6539SSH\u7aef\u53e3\u65f6\uff0c\u7cbe\u786e\u914d\u7f6e\u81f3\u5173\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u7cfb\u7edf\u5730\u5b9e\u65bd\u81ea\u5b9a\u4e49\u7aef\u53e3\u7684\u65b9\u6cd5\uff1a \u9009\u62e9\u9002\u5f53\u7684\u7aef\u53e3\u53f7\uff1a \u9009\u62e91024-65535\u8303\u56f4\u5185\u7684\u7aef\u53e3 \u907f\u514d\u4f7f\u7528\u77e5\u540d\u670d\u52a1\u7aef\u53e3 \u8003\u8651\u4f7f\u752849152\u4ee5\u4e0a\u7684\u7aef\u53e3\uff08\u52a8\u6001\u8303\u56f4\uff09 \u4fee\u6539SSH\u914d\u7f6e\uff1a sudo nano \/etc\/ssh\/sshd_config # \u5c06: Port 22 # \u6539\u4e3a: Port YOUR_CUSTOM_PORT sudo systemctl restart sshd \u66f4\u65b0\u9632\u706b\u5899\u89c4\u5219\uff1a sudo ufw allow YOUR_CUSTOM_PORT\/tcp sudo ufw reload \u9ad8\u7ea7\u5b89\u5168\u52a0\u56fa\u6280\u672f \u81ea\u5b9a\u4e49\u7aef\u53e3\u5e94\u8be5\u662f\u7efc\u5408\u5b89\u5168\u7b56\u7565\u7684\u4e00\u90e8\u5206\u3002\u5b9e\u65bd\u8fd9\u4e9b\u989d\u5916\u63aa\u65bd\u4ee5\u589e\u5f3a\u4fdd\u62a4\uff1a \u57fa\u4e8e\u5bc6\u94a5\u7684\u8ba4\u8bc1\uff1a ssh-keygen -t [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.varidata.com\/zh-cn\/knowledge\/default-port-vs-custom-port-ssh-server-security-protection\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":11,"featured_media":21895,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[80],"tags":[],"class_list":["post-21898","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u9ed8\u8ba4\u7aef\u53e3 vs \u81ea\u5b9a\u4e49\u7aef\u53e3\uff1aSSH \u670d\u52a1\u5668\u5b89\u5168\u9632\u62a4<\/title>\n<meta name=\"description\" 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