{"id":25543,"date":"2025-10-08T11:33:54","date_gmt":"2025-10-08T03:33:54","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/firewall-configuration-ssh-security-for-us-servers\/"},"modified":"2025-10-08T11:40:30","modified_gmt":"2025-10-08T03:40:30","slug":"firewall-configuration-ssh-security-for-us-servers","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/blog\/firewall-configuration-ssh-security-for-us-servers\/","title":{"rendered":"\u7f8e\u56fd\u670d\u52a1\u5668\u9632\u706b\u5899\u914d\u7f6e\u548cSSH\u5b89\u5168\u6307\u5357"},"content":{"rendered":"<p>\u5728\u5f53\u4eca\u4e0d\u65ad\u53d1\u5c55\u7684\u6570\u5b57\u73af\u5883\u4e2d\uff0c\u786e\u4fdd<a href=\"https:\/\/www.varidata.com\/zh-cn\/server\/us\/cn2\/\" target=\"_blank\">\u7f8e\u56fd\u670d\u52a1\u5668<\/a>\u57fa\u7840\u8bbe\u65bd\u7684\u5b89\u5168\u81f3\u5173\u91cd\u8981\u3002\u968f\u7740\u9488\u5bf9\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u7684\u7f51\u7edc\u5a01\u80c1\u4e0d\u65ad\u589e\u52a0\uff0c\u5b9e\u65bd\u5f3a\u5927\u7684\u9632\u706b\u5899\u89c4\u5219\u548cSSH\u5b89\u5168\u63aa\u65bd\u5df2\u6210\u4e3a\u4e0d\u53ef\u534f\u5546\u7684\u8981\u6c42\u3002\u672c\u7efc\u5408\u6307\u5357\u5c06\u5e26\u60a8\u4e86\u89e3\u7ecf\u8fc7\u5b9e\u6218\u68c0\u9a8c\u7684\u670d\u52a1\u5668\u9632\u5fa1\u5f3a\u5316\u7b56\u7565\u3002<\/p>\n<h2><strong>\u7406\u89e3\u670d\u52a1\u5668\u5b89\u5168\u57fa\u7840<\/strong><\/h2>\n<p>\u73b0\u4ee3\u670d\u52a1\u5668\u5b89\u5168\u67b6\u6784\u9700\u8981\u591a\u5c42\u6b21\u7684\u65b9\u6cd5\u3002\u867d\u7136\u8bb8\u591a\u4eba\u4ec5\u5173\u6ce8\u5916\u56f4\u5b89\u5168\uff0c\u4f46\u7ecf\u9a8c\u4e30\u5bcc\u7684\u7cfb\u7edf\u7ba1\u7406\u5458\u90fd\u77e5\u9053\uff0c\u7eb5\u6df1\u9632\u5fa1\u662f\u7ef4\u62a4\u5b89\u5168\u57fa\u7840\u8bbe\u65bd\u7684\u5173\u952e\u3002<\/p>\n<ul>\n<li>\u901a\u8fc7\u9632\u706b\u5899\u914d\u7f6e\u5b9e\u73b0\u7f51\u7edc\u7ea7\u4fdd\u62a4<\/li>\n<li>\u901a\u8fc7SSH\u52a0\u56fa\u5b9e\u73b0\u8bbf\u95ee\u63a7\u5236<\/li>\n<li>\u901a\u8fc7\u5b9a\u671f\u66f4\u65b0\u5b9e\u73b0\u7cfb\u7edf\u7ea7\u5b89\u5168<\/li>\n<li>\u901a\u8fc7\u76d1\u63a7\u548c\u65e5\u5fd7\u8bb0\u5f55\u8fdb\u884c\u5a01\u80c1\u68c0\u6d4b<\/li>\n<\/ul>\n<h2><strong>\u9632\u706b\u5899\u5b9e\u65bd\u57fa\u7840<\/strong><\/h2>\n<p>\u57fa\u4e8eLinux\u7684\u7cfb\u7edf\u63d0\u4f9b\u4e86\u591a\u79cd\u5f3a\u5927\u7684\u9632\u706b\u5899\u89e3\u51b3\u65b9\u6848\u3002\u5728UFW\u3001iptables\u6216firewalld\u4e4b\u95f4\u7684\u9009\u62e9\u901a\u5e38\u53d6\u51b3\u4e8e\u60a8\u7684\u5177\u4f53\u9700\u6c42\u548c\u4e13\u4e1a\u6c34\u5e73\u3002<\/p>\n<h3>UFW\uff08\u7b80\u5355\u9632\u706b\u5899\uff09\u8bbe\u7f6e<\/h3>\n<ol>\n<li>\u5b89\u88c5UFW\uff1a\n<pre><code>sudo apt-get update\r\nsudo apt-get install ufw<\/code><\/pre>\n<\/li>\n<li>\u914d\u7f6e\u9ed8\u8ba4\u7b56\u7565\uff1a\n<pre><code>sudo ufw default deny incoming\r\nsudo ufw default allow outgoing<\/code><\/pre>\n<\/li>\n<li>\u5141\u8bb8\u57fa\u672c\u670d\u52a1\uff1a\n<pre><code>sudo ufw allow ssh\r\nsudo ufw allow 80\/tcp\r\nsudo ufw allow 443\/tcp<\/code><\/pre>\n<\/li>\n<\/ol>\n<h2><strong>\u9ad8\u7ea7SSH\u5b89\u5168\u914d\u7f6e<\/strong><\/h2>\n<p>SSH\uff08\u5b89\u5168\u5916\u58f3\uff09\u4f5c\u4e3a\u670d\u52a1\u5668\u7684\u4e3b\u8981\u8bbf\u95ee\u5165\u53e3\u3002\u6b63\u786e\u914d\u7f6eSSH\u53ef\u4ee5\u663e\u8457\u964d\u4f4e\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u7684\u653b\u51fb\u9762\u3002<\/p>\n<h3>\u4fee\u6539SSH\u9ed8\u8ba4\u8bbe\u7f6e<\/h3>\n<p>\u5728\/etc\/ssh\/sshd_config\u4f4d\u7f6e\u7f16\u8f91SSH\u914d\u7f6e\u6587\u4ef6\uff0c\u4f7f\u7528\u8fd9\u4e9b\u589e\u5f3a\u5b89\u5168\u6027\u7684\u53c2\u6570\uff1a<\/p>\n<pre><code>\r\n# \u66f4\u6539\u9ed8\u8ba4SSH\u7aef\u53e3\r\nPort 2222\r\n\r\n# \u7981\u7528root\u767b\u5f55\r\nPermitRootLogin no\r\n\r\n# \u7981\u7528\u5bc6\u7801\u8ba4\u8bc1\r\nPasswordAuthentication no\r\n\r\n# \u8bbe\u7f6e\u7a7a\u95f2\u8d85\u65f6\u95f4\u9694\r\nClientAliveInterval 300\r\nClientAliveCountMax 2\r\n\r\n# \u9650\u5236\u7279\u5b9a\u7528\u6237\u7684SSH\u8bbf\u95ee\r\nAllowUsers admin developer\r\n<\/code><\/pre>\n<h3>\u5b9e\u65bdSSH\u5bc6\u94a5\u8ba4\u8bc1<\/h3>\n<ol>\n<li>\u5728\u672c\u5730\u673a\u5668\u4e0a\u751f\u6210SSH\u5bc6\u94a5\u5bf9\uff1a\n<pre><code>ssh-keygen -t ed25519 -C \"your_email@example.com\"<\/code><\/pre>\n<\/li>\n<li>\u5c06\u516c\u94a5\u4f20\u8f93\u5230\u670d\u52a1\u5668\uff1a\n<pre><code>ssh-copy-id -i ~\/.ssh\/id_ed25519.pub user@server-ip<\/code><\/pre>\n<\/li>\n<li>\u9a8c\u8bc1\u57fa\u4e8e\u5bc6\u94a5\u7684\u8ba4\u8bc1\uff1a\n<pre><code>ssh -i ~\/.ssh\/id_ed25519 user@server-ip<\/code><\/pre>\n<\/li>\n<\/ol>\n<h2><strong>\u5b9e\u65bdFail2ban\u9632\u6b62\u66b4\u529b\u653b\u51fb<\/strong><\/h2>\n<p>Fail2ban\u901a\u8fc7\u76d1\u63a7\u767b\u5f55\u5c1d\u8bd5\u5e76\u81ea\u52a8\u963b\u6b62\u53ef\u7591IP\u5730\u5740\u6765\u6dfb\u52a0\u989d\u5916\u7684\u5b89\u5168\u5c42\u3002<\/p>\n<ul>\n<li>\u5b89\u88c5Fail2ban\uff1a\n<pre><code>sudo apt-get install fail2ban<\/code><\/pre>\n<\/li>\n<li>\u521b\u5efa\u81ea\u5b9a\u4e49\u76d1\u72f1\u914d\u7f6e\uff1a\n<pre><code>[sshd]\r\nenabled = true\r\nport = 2222\r\nfilter = sshd\r\nlogpath = \/var\/log\/auth.log\r\nmaxretry = 3\r\nbantime = 3600<\/code><\/pre>\n<\/li>\n<\/ul>\n<h2><strong>\u57fa\u672c\u5b89\u5168\u76d1\u63a7\u5b9e\u8df5<\/strong><\/h2>\n<p>\u7ef4\u62a4\u670d\u52a1\u5668\u5b89\u5168\u9700\u8981\u6301\u7eed\u7684\u8b66\u60d5\u548c\u76d1\u63a7\u3002\u5b9e\u65bd\u8fd9\u4e9b\u5173\u952e\u5b9e\u8df5\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528logwatch\u7b49\u5de5\u5177\u8fdb\u884c\u5b9a\u671f\u65e5\u5fd7\u5206\u6790<\/li>\n<li>\u4f7f\u7528AIDE\u8fdb\u884c\u7cfb\u7edf\u5b8c\u6574\u6027\u68c0\u67e5<\/li>\n<li>\u901a\u8fc7netstat\u548ctcpdump\u8fdb\u884c\u7f51\u7edc\u6d41\u91cf\u76d1\u63a7<\/li>\n<li>\u914d\u7f6e\u81ea\u52a8\u5b89\u5168\u66f4\u65b0<\/li>\n<\/ul>\n<h2><strong>\u9632\u706b\u5899\u89c4\u5219\u7ba1\u7406\u6700\u4f73\u5b9e\u8df5<\/strong><\/h2>\n<p>\u6709\u6548\u7684\u9632\u706b\u5899\u7ba1\u7406\u4e0d\u4ec5\u4ec5\u662f\u521d\u59cb\u8bbe\u7f6e\u3002\u4ee5\u4e0b\u662f\u7ef4\u62a4\u5f3a\u5927\u9632\u706b\u5899\u89c4\u5219\u7684\u7cfb\u7edf\u65b9\u6cd5\uff1a<\/p>\n<h3>\u89c4\u5219\u4f18\u5316\u7b56\u7565<\/h3>\n<ul>\n<li>\u5b9e\u65bd\u6700\u5c0f\u6743\u9650\u8bbf\u95ee\u539f\u5219<\/li>\n<li>\u5b9a\u671f\u5ba1\u6838\u6d3b\u52a8\u9632\u706b\u5899\u89c4\u5219<\/li>\n<li>\u8bb0\u5f55\u89c4\u5219\u53d8\u66f4\u53ca\u5176\u7406\u7531<\/li>\n<li>\u9996\u5148\u5728\u6d4b\u8bd5\u73af\u5883\u4e2d\u6d4b\u8bd5\u89c4\u5219<\/li>\n<\/ul>\n<pre><code># \u57fa\u4e8eIP\u7684\u7cbe\u7ec6\u89c4\u5219\u793a\u4f8b\r\nsudo ufw allow from 192.168.1.0\/24 to any port 3306\r\nsudo ufw allow from 10.0.0.0\/8 to any port 11211\r\n<\/code><\/pre>\n<h2><strong>\u5e38\u89c1\u5b89\u5168\u95ee\u9898\u6545\u969c\u6392\u9664<\/strong><\/h2>\n<p>\u5728\u7ba1\u7406\u670d\u52a1\u5668\u5b89\u5168\u65f6\uff0c\u60a8\u53ef\u80fd\u4f1a\u9047\u5230\u4ee5\u4e0b\u60c5\u51b5\u3002\u8fd9\u91cc\u662f\u7ecf\u8fc7\u5b9e\u6218\u68c0\u9a8c\u7684\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n<h3>SSH\u8fde\u63a5\u95ee\u9898<\/h3>\n<ol>\n<li>\u9a8c\u8bc1SSH\u670d\u52a1\u72b6\u6001\uff1a\n<pre><code>systemctl status sshd<\/code><\/pre>\n<\/li>\n<li>\u68c0\u67e5SSH\u65e5\u5fd7\uff1a\n<pre><code>tail -f \/var\/log\/auth.log<\/code><\/pre>\n<\/li>\n<li>\u786e\u8ba4\u9632\u706b\u5899\u89c4\u5219\uff1a\n<pre><code>sudo ufw status verbose<\/code><\/pre>\n<\/li>\n<\/ol>\n<h3>\u9632\u706b\u5899\u89c4\u5219\u51b2\u7a81<\/h3>\n<ul>\n<li>\u6309\u4f18\u5148\u7ea7\u987a\u5e8f\u5217\u51fa\u89c4\u5219\uff1a\n<pre><code>sudo iptables -L -n -v --line-numbers<\/code><\/pre>\n<\/li>\n<li>\u8bc6\u522b\u51b2\u7a81\u89c4\u5219\uff1a\n<pre><code>sudo ufw status numbered<\/code><\/pre>\n<\/li>\n<\/ul>\n<h2><strong>\u5b89\u5168\u7ef4\u62a4\u8ba1\u5212<\/strong><\/h2>\n<p>\u5b9e\u65bd\u4ee5\u4e0b\u5b89\u5168\u7ef4\u62a4\u65f6\u95f4\u8868\u4ee5\u83b7\u5f97\u6700\u4f73\u4fdd\u62a4\uff1a<\/p>\n<ul>\n<li>\u6bcf\u65e5\uff1a\n<ul>\n<li>\u76d1\u63a7\u8eab\u4efd\u9a8c\u8bc1\u65e5\u5fd7<\/li>\n<li>\u68c0\u67e5\u7cfb\u7edf\u8d44\u6e90\u4f7f\u7528\u60c5\u51b5<\/li>\n<li>\u9a8c\u8bc1\u8fd0\u884c\u4e2d\u7684\u670d\u52a1<\/li>\n<\/ul>\n<\/li>\n<li>\u6bcf\u5468\uff1a\n<ul>\n<li>\u5ba1\u67e5\u9632\u706b\u5899\u89c4\u5219<\/li>\n<li>\u66f4\u65b0\u7cfb\u7edf\u8f6f\u4ef6\u5305<\/li>\n<li>\u626b\u63cf\u6f0f\u6d1e<\/li>\n<\/ul>\n<\/li>\n<li>\u6bcf\u6708\uff1a\n<ul>\n<li>\u5ba1\u8ba1\u7528\u6237\u8d26\u6237<\/li>\n<li>\u68c0\u67e5\u5b89\u5168\u7b56\u7565<\/li>\n<li>\u6d4b\u8bd5\u707e\u96be\u6062\u590d<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2><strong>\u9ad8\u7ea7\u5b89\u5168\u52a0\u56fa\u6280\u672f<\/strong><\/h2>\n<p>\u5bf9\u4e8e\u4f01\u4e1a\u7ea7\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\uff0c\u5b9e\u65bd\u8fd9\u4e9b\u989d\u5916\u7684\u5b89\u5168\u63aa\u65bd\uff1a<\/p>\n<ul>\n<li>\u5728\/etc\/hosts.allow\u548c\/etc\/hosts.deny\u4e2d\u914d\u7f6eTCP\u5305\u88c5\u5668<\/li>\n<li>\u4e3a\u654f\u611f\u670d\u52a1\u5b9e\u65bd\u7aef\u53e3\u6572\u95e8<\/li>\n<li>\u8bbe\u7f6e\u5165\u4fb5\u68c0\u6d4b\u7cfb\u7edf\uff08IDS\uff09<\/li>\n<li>\u542f\u7528SELinux\u6216AppArmor\u5f3a\u5236\u8bbf\u95ee\u63a7\u5236<\/li>\n<\/ul>\n<pre><code># \u7aef\u53e3\u6572\u95e8\u914d\u7f6e\u793a\u4f8b\r\nsudo apt-get install knockd\r\n# \u914d\u7f6e\u5e8f\u5217\uff1a7000,8000,9000\r\n\/etc\/knockd.conf:\r\n[openSSH]\r\nsequence = 7000,8000,9000\r\nseq_timeout = 5\r\ncommand = \/sbin\/iptables -A INPUT -s %IP% -p tcp --dport 22 -j ACCEPT\r\ntcpflags = syn\r\n<\/code><\/pre>\n<h2><strong>\u5b89\u5168\u81ea\u52a8\u5316\u548c\u6269\u5c55<\/strong><\/h2>\n<p>\u5229\u7528\u8fd9\u4e9b\u81ea\u52a8\u5316\u5de5\u5177\u6765\u7ef4\u62a4\u591a\u4e2a\u670d\u52a1\u5668\u7684\u5b89\u5168\u6027\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528Ansible\u8fdb\u884c\u914d\u7f6e\u7ba1\u7406<\/li>\n<li>\u4f7f\u7528Terraform\u8fdb\u884c\u57fa\u7840\u8bbe\u65bd\u5373\u4ee3\u7801<\/li>\n<li>Docker\u5b89\u5168\u626b\u63cf<\/li>\n<li>\u81ea\u52a8\u5907\u4efd\u89e3\u51b3\u65b9\u6848<\/li>\n<\/ul>\n<h2><strong>\u6700\u7ec8\u5b89\u5168\u68c0\u67e5\u6e05\u5355<\/strong><\/h2>\n<p>\u5728\u5c06\u7f8e\u56fd\u670d\u52a1\u5668\u90e8\u7f72\u5230\u751f\u4ea7\u73af\u5883\u4e4b\u524d\uff0c\u9a8c\u8bc1\u4ee5\u4e0b\u5b89\u5168\u63aa\u65bd\uff1a<\/p>\n<ol>\n<li>\u9632\u706b\u5899\u914d\u7f6e\uff1a\n<ul>\n<li>\u9ed8\u8ba4\u62d2\u7edd\u7b56\u7565\u5df2\u6fc0\u6d3b<\/li>\n<li>\u5fc5\u8981\u670d\u52a1\u5df2\u5141\u8bb8<\/li>\n<li>\u5df2\u5b9e\u65bd\u901f\u7387\u9650\u5236<\/li>\n<\/ul>\n<\/li>\n<li>SSH\u5b89\u5168\uff1a\n<ul>\n<li>\u5df2\u542f\u7528\u57fa\u4e8e\u5bc6\u94a5\u7684\u8ba4\u8bc1<\/li>\n<li>\u5df2\u7981\u7528root\u767b\u5f55<\/li>\n<li>\u5df2\u914d\u7f6e\u81ea\u5b9a\u4e49\u7aef\u53e3<\/li>\n<\/ul>\n<\/li>\n<li>\u7cfb\u7edf\u52a0\u56fa\uff1a\n<ul>\n<li>\u5df2\u5b89\u6392\u5b9a\u671f\u66f4\u65b0<\/li>\n<li>\u5df2\u7981\u7528\u4e0d\u5fc5\u8981\u7684\u670d\u52a1<\/li>\n<li>\u5df2\u9a8c\u8bc1\u6587\u4ef6\u6743\u9650<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><strong>\u7ed3\u8bba<\/strong><\/h2>\n<p>\u4e3a\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u57fa\u7840\u8bbe\u65bd\u5b9e\u65bd\u5f3a\u5927\u7684\u5b89\u5168\u63aa\u65bd\u9700\u8981\u4ed4\u7ec6\u89c4\u5212\u548c\u6301\u7eed\u7ef4\u62a4\u3002\u901a\u8fc7\u9075\u5faa\u8fd9\u4e2a\u7efc\u5408\u6307\u5357\uff0c\u60a8\u5df2\u7ecf\u5728\u521b\u5efa\u5b89\u5168\u7684\u670d\u52a1\u5668\u73af\u5883\u65b9\u9762\u8fc8\u51fa\u4e86\u91cd\u8981\u7684\u6b65\u4f10\u3002\u8bf7\u8bb0\u4f4f\uff0c\u670d\u52a1\u5668\u5b89\u5168\u662f\u4e00\u4e2a\u6301\u7eed\u7684\u8fc7\u7a0b &#8211; \u8981\u53ca\u65f6\u4e86\u89e3\u65b0\u7684\u5a01\u80c1\uff0c\u5e76\u5b9a\u671f\u66f4\u65b0\u60a8\u7684\u5b89\u5168\u534f\u8bae\u3002<\/p>\n<p>\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7f8e\u56fd\u670d\u52a1\u5668\u5b89\u5168\u3001\u9632\u706b\u5899\u914d\u7f6e\u548c\u5b89\u5168\u670d\u52a1\u5668\u79df\u7528\u5b9e\u8df5\u7684\u9ad8\u7ea7\u4e3b\u9898\uff0c\u8bf7\u6d4f\u89c8\u6211\u4eec\u5173\u4e8e\u670d\u52a1\u5668\u57fa\u7840\u8bbe\u65bd\u4fdd\u62a4\u548c\u5408\u89c4\u8981\u6c42\u7684\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u5f53\u4eca\u4e0d\u65ad\u53d1\u5c55\u7684\u6570\u5b57\u73af\u5883\u4e2d\uff0c\u786e\u4fdd\u7f8e\u56fd\u670d\u52a1\u5668\u57fa\u7840\u8bbe\u65bd\u7684\u5b89\u5168\u81f3\u5173\u91cd\u8981\u3002\u968f\u7740\u9488\u5bf9\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u7684\u7f51\u7edc\u5a01\u80c1\u4e0d\u65ad\u589e\u52a0\uff0c\u5b9e\u65bd\u5f3a\u5927\u7684\u9632\u706b\u5899\u89c4\u5219\u548cSSH\u5b89\u5168\u63aa\u65bd\u5df2\u6210\u4e3a\u4e0d\u53ef\u534f\u5546\u7684\u8981\u6c42\u3002\u672c\u7efc\u5408\u6307\u5357\u5c06\u5e26\u60a8\u4e86\u89e3\u7ecf\u8fc7\u5b9e\u6218\u68c0\u9a8c\u7684\u670d\u52a1\u5668\u9632\u5fa1\u5f3a\u5316\u7b56\u7565\u3002 \u7406\u89e3\u670d\u52a1\u5668\u5b89\u5168\u57fa\u7840 \u73b0\u4ee3\u670d\u52a1\u5668\u5b89\u5168\u67b6\u6784\u9700\u8981\u591a\u5c42\u6b21\u7684\u65b9\u6cd5\u3002\u867d\u7136\u8bb8\u591a\u4eba\u4ec5\u5173\u6ce8\u5916\u56f4\u5b89\u5168\uff0c\u4f46\u7ecf\u9a8c\u4e30\u5bcc\u7684\u7cfb\u7edf\u7ba1\u7406\u5458\u90fd\u77e5\u9053\uff0c\u7eb5\u6df1\u9632\u5fa1\u662f\u7ef4\u62a4\u5b89\u5168\u57fa\u7840\u8bbe\u65bd\u7684\u5173\u952e\u3002 \u901a\u8fc7\u9632\u706b\u5899\u914d\u7f6e\u5b9e\u73b0\u7f51\u7edc\u7ea7\u4fdd\u62a4 \u901a\u8fc7SSH\u52a0\u56fa\u5b9e\u73b0\u8bbf\u95ee\u63a7\u5236 \u901a\u8fc7\u5b9a\u671f\u66f4\u65b0\u5b9e\u73b0\u7cfb\u7edf\u7ea7\u5b89\u5168 \u901a\u8fc7\u76d1\u63a7\u548c\u65e5\u5fd7\u8bb0\u5f55\u8fdb\u884c\u5a01\u80c1\u68c0\u6d4b \u9632\u706b\u5899\u5b9e\u65bd\u57fa\u7840 \u57fa\u4e8eLinux\u7684\u7cfb\u7edf\u63d0\u4f9b\u4e86\u591a\u79cd\u5f3a\u5927\u7684\u9632\u706b\u5899\u89e3\u51b3\u65b9\u6848\u3002\u5728UFW\u3001iptables\u6216firewalld\u4e4b\u95f4\u7684\u9009\u62e9\u901a\u5e38\u53d6\u51b3\u4e8e\u60a8\u7684\u5177\u4f53\u9700\u6c42\u548c\u4e13\u4e1a\u6c34\u5e73\u3002 UFW\uff08\u7b80\u5355\u9632\u706b\u5899\uff09\u8bbe\u7f6e \u5b89\u88c5UFW\uff1a sudo apt-get update sudo apt-get install ufw \u914d\u7f6e\u9ed8\u8ba4\u7b56\u7565\uff1a sudo ufw default deny incoming sudo ufw default allow outgoing \u5141\u8bb8\u57fa\u672c\u670d\u52a1\uff1a sudo ufw allow ssh sudo ufw allow 80\/tcp sudo ufw allow 443\/tcp \u9ad8\u7ea7SSH\u5b89\u5168\u914d\u7f6e SSH\uff08\u5b89\u5168\u5916\u58f3\uff09\u4f5c\u4e3a\u670d\u52a1\u5668\u7684\u4e3b\u8981\u8bbf\u95ee\u5165\u53e3\u3002\u6b63\u786e\u914d\u7f6eSSH\u53ef\u4ee5\u663e\u8457\u964d\u4f4e\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u7684\u653b\u51fb\u9762\u3002 \u4fee\u6539SSH\u9ed8\u8ba4\u8bbe\u7f6e \u5728\/etc\/ssh\/sshd_config\u4f4d\u7f6e\u7f16\u8f91SSH\u914d\u7f6e\u6587\u4ef6\uff0c\u4f7f\u7528\u8fd9\u4e9b\u589e\u5f3a\u5b89\u5168\u6027\u7684\u53c2\u6570\uff1a # \u66f4\u6539\u9ed8\u8ba4SSH\u7aef\u53e3 Port 2222 # \u7981\u7528root\u767b\u5f55 PermitRootLogin no # [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/firewall-configuration-ssh-security-for-us-servers\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":11,"featured_media":25539,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[76],"tags":[],"class_list":["post-25543","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 v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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