{"id":25544,"date":"2025-10-08T11:33:54","date_gmt":"2025-10-08T03:33:54","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-tw\/firewall-configuration-ssh-security-for-us-servers\/"},"modified":"2025-10-08T11:36:33","modified_gmt":"2025-10-08T03:36:33","slug":"firewall-configuration-ssh-security-for-us-servers","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/firewall-configuration-ssh-security-for-us-servers\/","title":{"rendered":"\u7f8e\u570b\u4f3a\u670d\u5668\u9632\u706b\u7246\u914d\u7f6e\u548cSSH\u5b89\u5168\u6307\u5357"},"content":{"rendered":"<p>\u5728\u7576\u4eca\u4e0d\u65b7\u767c\u5c55\u7684\u6578\u4f4d\u74b0\u5883\u4e2d\uff0c\u78ba\u4fdd<a href=\"https:\/\/www.varidata.com\/zh-tw\/server\/us\/cn2\/\" target=\"_blank\">\u7f8e\u570b\u4f3a\u670d\u5668<\/a>\u57fa\u790e\u8a2d\u65bd\u7684\u5b89\u5168\u81f3\u95dc\u91cd\u8981\u3002\u96a8\u8457\u91dd\u5c0d\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\u7684\u7db2\u8def\u5a01\u8105\u4e0d\u65b7\u589e\u52a0\uff0c\u5be6\u65bd\u5f37\u5927\u7684\u9632\u706b\u7246\u898f\u5247\u548cSSH\u5b89\u5168\u63aa\u65bd\u5df2\u6210\u70ba\u4e0d\u53ef\u5354\u5546\u7684\u8981\u6c42\u3002\u672c\u7d9c\u5408\u6307\u5357\u5c07\u5e36\u60a8\u4e86\u89e3\u7d93\u904e\u5be6\u6230\u6aa2\u9a57\u7684\u4f3a\u670d\u5668\u9632\u79a6\u5f37\u5316\u7b56\u7565\u3002<\/p>\n<h2><strong>\u7406\u89e3\u4f3a\u670d\u5668\u5b89\u5168\u57fa\u790e<\/strong><\/h2>\n<p>\u73fe\u4ee3\u4f3a\u670d\u5668\u5b89\u5168\u67b6\u69cb\u9700\u8981\u591a\u5c64\u6b21\u7684\u65b9\u6cd5\u3002\u96d6\u7136\u8a31\u591a\u4eba\u50c5\u95dc\u6ce8\u5916\u570d\u5b89\u5168\uff0c\u4f46\u7d93\u9a57\u8c50\u5bcc\u7684\u7cfb\u7d71\u7ba1\u7406\u54e1\u90fd\u77e5\u9053\uff0c\u7e31\u6df1\u9632\u79a6\u662f\u7dad\u8b77\u5b89\u5168\u57fa\u790e\u8a2d\u65bd\u7684\u95dc\u9375\u3002<\/p>\n<ul>\n<li>\u900f\u904e\u9632\u706b\u7246\u914d\u7f6e\u5be6\u73fe\u7db2\u8def\u7d1a\u4fdd\u8b77<\/li>\n<li>\u900f\u904eSSH\u52a0\u56fa\u5be6\u73fe\u5b58\u53d6\u63a7\u5236<\/li>\n<li>\u900f\u904e\u5b9a\u671f\u66f4\u65b0\u5be6\u73fe\u7cfb\u7d71\u7d1a\u5b89\u5168<\/li>\n<li>\u900f\u904e\u76e3\u63a7\u548c\u65e5\u8a8c\u8a18\u9304\u9032\u884c\u5a01\u8105\u6aa2\u6e2c<\/li>\n<\/ul>\n<h2><strong>\u9632\u706b\u7246\u5be6\u65bd\u57fa\u790e<\/strong><\/h2>\n<p>\u57fa\u65bcLinux\u7684\u7cfb\u7d71\u63d0\u4f9b\u4e86\u591a\u7a2e\u5f37\u5927\u7684\u9632\u706b\u7246\u89e3\u6c7a\u65b9\u6848\u3002\u5728UFW\u3001iptables\u6216firewalld\u4e4b\u9593\u7684\u9078\u64c7\u901a\u5e38\u53d6\u6c7a\u65bc\u60a8\u7684\u5177\u9ad4\u9700\u6c42\u548c\u5c08\u696d\u6c34\u5e73\u3002<\/p>\n<h3>UFW\uff08\u7c21\u55ae\u9632\u706b\u7246\uff09\u8a2d\u5b9a<\/h3>\n<ol>\n<li>\u5b89\u88ddUFW\uff1a\n<pre><code>sudo apt-get update\r\nsudo apt-get install ufw<\/code><\/pre>\n<\/li>\n<li>\u914d\u7f6e\u9810\u8a2d\u7b56\u7565\uff1a\n<pre><code>sudo ufw default deny incoming\r\nsudo ufw default allow outgoing<\/code><\/pre>\n<\/li>\n<li>\u5141\u8a31\u57fa\u672c\u670d\u52d9\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>\u9032\u968eSSH\u5b89\u5168\u914d\u7f6e<\/strong><\/h2>\n<p>SSH\uff08\u5b89\u5168\u5916\u6bbc\uff09\u4f5c\u70ba\u4f3a\u670d\u5668\u7684\u4e3b\u8981\u5b58\u53d6\u5165\u53e3\u3002\u6b63\u78ba\u914d\u7f6eSSH\u53ef\u4ee5\u986f\u8457\u964d\u4f4e\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\u7684\u653b\u64ca\u9762\u3002<\/p>\n<h3>\u4fee\u6539SSH\u9810\u8a2d\u8a2d\u5b9a<\/h3>\n<p>\u5728\/etc\/ssh\/sshd_config\u4f4d\u7f6e\u7de8\u8f2fSSH\u914d\u7f6e\u6a94\u6848\uff0c\u4f7f\u7528\u9019\u4e9b\u589e\u5f37\u5b89\u5168\u6027\u7684\u53c3\u6578\uff1a<\/p>\n<pre><code>\r\n# \u66f4\u6539\u9810\u8a2dSSH\u9023\u63a5\u57e0\r\nPort 2222\r\n\r\n# \u7981\u7528root\u767b\u5165\r\nPermitRootLogin no\r\n\r\n# \u7981\u7528\u5bc6\u78bc\u8a8d\u8b49\r\nPasswordAuthentication no\r\n\r\n# \u8a2d\u5b9a\u9592\u7f6e\u8d85\u6642\u9593\u9694\r\nClientAliveInterval 300\r\nClientAliveCountMax 2\r\n\r\n# \u9650\u5236\u7279\u5b9a\u4f7f\u7528\u8005\u7684SSH\u5b58\u53d6\r\nAllowUsers admin developer\r\n<\/code><\/pre>\n<h3>\u5be6\u65bdSSH\u91d1\u9470\u8a8d\u8b49<\/h3>\n<ol>\n<li>\u5728\u672c\u5730\u6a5f\u5668\u4e0a\u7522\u751fSSH\u91d1\u9470\u5c0d\uff1a\n<pre><code>ssh-keygen -t ed25519 -C \"your_email@example.com\"<\/code><\/pre>\n<\/li>\n<li>\u5c07\u516c\u9470\u50b3\u8f38\u5230\u4f3a\u670d\u5668\uff1a\n<pre><code>ssh-copy-id -i ~\/.ssh\/id_ed25519.pub user@server-ip<\/code><\/pre>\n<\/li>\n<li>\u9a57\u8b49\u57fa\u65bc\u91d1\u9470\u7684\u8a8d\u8b49\uff1a\n<pre><code>ssh -i ~\/.ssh\/id_ed25519 user@server-ip<\/code><\/pre>\n<\/li>\n<\/ol>\n<h2><strong>\u5be6\u65bdFail2ban\u9632\u6b62\u66b4\u529b\u653b\u64ca<\/strong><\/h2>\n<p>Fail2ban\u900f\u904e\u76e3\u63a7\u767b\u5165\u5617\u8a66\u4e26\u81ea\u52d5\u963b\u6b62\u53ef\u7591IP\u4f4d\u5740\u4f86\u65b0\u589e\u984d\u5916\u7684\u5b89\u5168\u5c64\u3002<\/p>\n<ul>\n<li>\u5b89\u88ddFail2ban\uff1a\n<pre><code>sudo apt-get install fail2ban<\/code><\/pre>\n<\/li>\n<li>\u5efa\u7acb\u81ea\u8a02\u76e3\u7344\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\u76e3\u63a7\u5be6\u52d9<\/strong><\/h2>\n<p>\u7dad\u8b77\u4f3a\u670d\u5668\u5b89\u5168\u9700\u8981\u6301\u7e8c\u7684\u8b66\u89ba\u548c\u76e3\u63a7\u3002\u5be6\u65bd\u9019\u4e9b\u95dc\u9375\u5be6\u52d9\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528logwatch\u7b49\u5de5\u5177\u9032\u884c\u5b9a\u671f\u65e5\u8a8c\u5206\u6790<\/li>\n<li>\u4f7f\u7528AIDE\u9032\u884c\u7cfb\u7d71\u5b8c\u6574\u6027\u6aa2\u67e5<\/li>\n<li>\u900f\u904enetstat\u548ctcpdump\u9032\u884c\u7db2\u8def\u6d41\u91cf\u76e3\u63a7<\/li>\n<li>\u914d\u7f6e\u81ea\u52d5\u5b89\u5168\u66f4\u65b0<\/li>\n<\/ul>\n<h2><strong>\u9632\u706b\u7246\u898f\u5247\u7ba1\u7406\u6700\u4f73\u5be6\u52d9<\/strong><\/h2>\n<p>\u6709\u6548\u7684\u9632\u706b\u7246\u7ba1\u7406\u4e0d\u50c5\u50c5\u662f\u521d\u59cb\u8a2d\u5b9a\u3002\u4ee5\u4e0b\u662f\u7dad\u8b77\u5f37\u5927\u9632\u706b\u7246\u898f\u5247\u7684\u7cfb\u7d71\u65b9\u6cd5\uff1a<\/p>\n<h3>\u898f\u5247\u6700\u4f73\u5316\u7b56\u7565<\/h3>\n<ul>\n<li>\u5be6\u65bd\u6700\u5c0f\u6b0a\u9650\u5b58\u53d6\u539f\u5247<\/li>\n<li>\u5b9a\u671f\u7a3d\u6838\u6d3b\u52d5\u9632\u706b\u7246\u898f\u5247<\/li>\n<li>\u8a18\u9304\u898f\u5247\u8b8a\u66f4\u53ca\u5176\u7406\u7531<\/li>\n<li>\u9996\u5148\u5728\u6e2c\u8a66\u74b0\u5883\u4e2d\u6e2c\u8a66\u898f\u5247<\/li>\n<\/ul>\n<pre><code># \u57fa\u65bcIP\u7684\u7cbe\u7d30\u898f\u5247\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\u898b\u5b89\u5168\u554f\u984c\u6545\u969c\u6392\u9664<\/strong><\/h2>\n<p>\u5728\u7ba1\u7406\u4f3a\u670d\u5668\u5b89\u5168\u6642\uff0c\u60a8\u53ef\u80fd\u6703\u9047\u5230\u4ee5\u4e0b\u60c5\u6cc1\u3002\u9019\u88e1\u662f\u7d93\u904e\u5be6\u6230\u6aa2\u9a57\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<h3>SSH\u9023\u7dda\u554f\u984c<\/h3>\n<ol>\n<li>\u9a57\u8b49SSH\u670d\u52d9\u72c0\u614b\uff1a\n<pre><code>systemctl status sshd<\/code><\/pre>\n<\/li>\n<li>\u6aa2\u67e5SSH\u65e5\u8a8c\uff1a\n<pre><code>tail -f \/var\/log\/auth.log<\/code><\/pre>\n<\/li>\n<li>\u78ba\u8a8d\u9632\u706b\u7246\u898f\u5247\uff1a\n<pre><code>sudo ufw status verbose<\/code><\/pre>\n<\/li>\n<\/ol>\n<h3>\u9632\u706b\u7246\u898f\u5247\u885d\u7a81<\/h3>\n<ul>\n<li>\u6309\u512a\u5148\u7d1a\u9806\u5e8f\u5217\u51fa\u898f\u5247\uff1a\n<pre><code>sudo iptables -L -n -v --line-numbers<\/code><\/pre>\n<\/li>\n<li>\u8b58\u5225\u885d\u7a81\u898f\u5247\uff1a\n<pre><code>sudo ufw status numbered<\/code><\/pre>\n<\/li>\n<\/ul>\n<h2><strong>\u5b89\u5168\u7dad\u8b77\u8a08\u756b<\/strong><\/h2>\n<p>\u5be6\u65bd\u4ee5\u4e0b\u5b89\u5168\u7dad\u8b77\u6642\u9593\u8868\u4ee5\u7372\u5f97\u6700\u4f73\u4fdd\u8b77\uff1a<\/p>\n<ul>\n<li>\u6bcf\u65e5\uff1a\n<ul>\n<li>\u76e3\u63a7\u8eab\u4efd\u9a57\u8b49\u65e5\u8a8c<\/li>\n<li>\u6aa2\u67e5\u7cfb\u7d71\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1<\/li>\n<li>\u9a57\u8b49\u904b\u884c\u4e2d\u7684\u670d\u52d9<\/li>\n<\/ul>\n<\/li>\n<li>\u6bcf\u9031\uff1a\n<ul>\n<li>\u7a3d\u6838\u9632\u706b\u7246\u898f\u5247<\/li>\n<li>\u66f4\u65b0\u7cfb\u7d71\u5957\u4ef6<\/li>\n<li>\u6383\u63cf\u6f0f\u6d1e<\/li>\n<\/ul>\n<\/li>\n<li>\u6bcf\u6708\uff1a\n<ul>\n<li>\u7a3d\u6838\u4f7f\u7528\u8005\u5e33\u6236<\/li>\n<li>\u6aa2\u67e5\u5b89\u5168\u7b56\u7565<\/li>\n<li>\u6e2c\u8a66\u707d\u96e3\u5fa9\u539f<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2><strong>\u9032\u968e\u5b89\u5168\u5f37\u5316\u6280\u8853<\/strong><\/h2>\n<p>\u5c0d\u65bc\u4f01\u696d\u7d1a\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\uff0c\u5be6\u65bd\u9019\u4e9b\u984d\u5916\u7684\u5b89\u5168\u63aa\u65bd\uff1a<\/p>\n<ul>\n<li>\u5728\/etc\/hosts.allow\u548c\/etc\/hosts.deny\u4e2d\u914d\u7f6eTCP\u5305\u88dd\u5668<\/li>\n<li>\u70ba\u654f\u611f\u670d\u52d9\u5be6\u65bd\u9023\u63a5\u57e0\u6572\u9580<\/li>\n<li>\u8a2d\u5b9a\u5165\u4fb5\u5075\u6e2c\u7cfb\u7d71\uff08IDS\uff09<\/li>\n<li>\u555f\u7528SELinux\u6216AppArmor\u5f37\u5236\u5b58\u53d6\u63a7\u5236<\/li>\n<\/ul>\n<pre><code># \u9023\u63a5\u57e0\u6572\u9580\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\u52d5\u5316\u548c\u64f4\u5c55<\/strong><\/h2>\n<p>\u5229\u7528\u9019\u4e9b\u81ea\u52d5\u5316\u5de5\u5177\u4f86\u7dad\u8b77\u591a\u500b\u4f3a\u670d\u5668\u7684\u5b89\u5168\u6027\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528Ansible\u9032\u884c\u914d\u7f6e\u7ba1\u7406<\/li>\n<li>\u4f7f\u7528Terraform\u9032\u884c\u57fa\u790e\u8a2d\u65bd\u5373\u7a0b\u5f0f\u78bc<\/li>\n<li>Docker\u5b89\u5168\u6383\u63cf<\/li>\n<li>\u81ea\u52d5\u5099\u4efd\u89e3\u6c7a\u65b9\u6848<\/li>\n<\/ul>\n<h2><strong>\u6700\u7d42\u5b89\u5168\u6aa2\u67e5\u6e05\u55ae<\/strong><\/h2>\n<p>\u5728\u5c07\u7f8e\u570b\u4f3a\u670d\u5668\u90e8\u7f72\u5230\u6b63\u5f0f\u74b0\u5883\u4e4b\u524d\uff0c\u9a57\u8b49\u4ee5\u4e0b\u5b89\u5168\u63aa\u65bd\uff1a<\/p>\n<ol>\n<li>\u9632\u706b\u7246\u914d\u7f6e\uff1a\n<ul>\n<li>\u9810\u8a2d\u62d2\u7d55\u7b56\u7565\u5df2\u555f\u7528<\/li>\n<li>\u5fc5\u8981\u670d\u52d9\u5df2\u5141\u8a31<\/li>\n<li>\u5df2\u5be6\u65bd\u901f\u7387\u9650\u5236<\/li>\n<\/ul>\n<\/li>\n<li>SSH\u5b89\u5168\uff1a\n<ul>\n<li>\u5df2\u555f\u7528\u57fa\u65bc\u91d1\u9470\u7684\u8a8d\u8b49<\/li>\n<li>\u5df2\u7981\u7528root\u767b\u5165<\/li>\n<li>\u5df2\u914d\u7f6e\u81ea\u8a02\u9023\u63a5\u57e0<\/li>\n<\/ul>\n<\/li>\n<li>\u7cfb\u7d71\u5f37\u5316\uff1a\n<ul>\n<li>\u5df2\u6392\u7a0b\u5b9a\u671f\u66f4\u65b0<\/li>\n<li>\u5df2\u505c\u7528\u4e0d\u5fc5\u8981\u7684\u670d\u52d9<\/li>\n<li>\u5df2\u9a57\u8b49\u6a94\u6848\u6b0a\u9650<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><strong>\u7d50\u8ad6<\/strong><\/h2>\n<p>\u70ba\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u57fa\u790e\u8a2d\u65bd\u5be6\u65bd\u5f37\u5927\u7684\u5b89\u5168\u63aa\u65bd\u9700\u8981\u4ed4\u7d30\u898f\u5283\u548c\u6301\u7e8c\u7dad\u8b77\u3002\u900f\u904e\u9075\u5faa\u9019\u500b\u7d9c\u5408\u6307\u5357\uff0c\u60a8\u5df2\u7d93\u5728\u5efa\u7acb\u5b89\u5168\u7684\u4f3a\u670d\u5668\u74b0\u5883\u65b9\u9762\u9081\u51fa\u4e86\u91cd\u8981\u7684\u6b65\u4f10\u3002\u8acb\u8a18\u4f4f\uff0c\u4f3a\u670d\u5668\u5b89\u5168\u662f\u4e00\u500b\u6301\u7e8c\u7684\u904e\u7a0b 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href=\"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/firewall-configuration-ssh-security-for-us-servers\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":11,"featured_media":25540,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[267],"tags":[],"class_list":["post-25544","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-tc"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u7f8e\u570b\u4f3a\u670d\u5668\u9632\u706b\u7246\u914d\u7f6e\u548cSSH\u5b89\u5168\u6307\u5357<\/title>\n<meta name=\"description\" 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