{"id":32618,"date":"2026-08-14T10:00:00","date_gmt":"2026-08-14T02:00:00","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=32618"},"modified":"2026-08-16T20:01:22","modified_gmt":"2026-08-16T12:01:22","slug":"cloud-server-firewall-baseline","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/guides\/cloud-server-firewall-baseline\/","title":{"rendered":"\u4e91\u670d\u52a1\u5668\u9632\u706b\u5899\u57fa\u7ebf\u914d\u7f6e\uff1a\u53ea\u5f00\u653e\u5fc5\u8981\u7aef\u53e3\u5e76\u4fdd\u7559\u56de\u6eda\u8def\u5f84"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/08\/cloud-server-firewall-baseline-cover.webp\" alt=\"\u4e91\u670d\u52a1\u5668\u9632\u706b\u5899\u57fa\u7ebf\u5c01\u9762\" loading=\"lazy\" \/><\/p>\n<p>\u8fd9\u7bc7\u6307\u5357\u5e2e\u52a9\u4f60\u4e3a\u4e91\u670d\u52a1\u5668\uff08[VPS](https:\/\/cn.hostease.com\/vps\/)\uff0c[\u865a\u62df\u4e13\u7528\u670d\u52a1\u5668](https:\/\/cn.hostease.com\/vps\/)\uff09\u914d\u7f6e\u9632\u706b\u5899\u57fa\u7ebf\uff1a\u53ea\u5f00\u653e\u4e1a\u52a1\u5fc5\u8981\u7aef\u53e3\u3001\u9650\u5236\u7ba1\u7406\u5165\u53e3\u6765\u6e90\u3001\u5e76\u5728\u6bcf\u6b21\u53d8\u66f4\u524d\u4fdd\u7559\u53ef\u56de\u6eda\u7684\u5feb\u7167\u8def\u5f84\u3002\u9632\u706b\u5899\u4e0d\u662f\u914d\u4e00\u6b21\u5c31\u5b8c\u4e8b\uff0c\u914d\u7f6e\u53d8\u66f4\u540e\u5fc5\u987b\u9a8c\u8bc1\u670d\u52a1\u548c\u8fdc\u7a0b\u8bbf\u95ee\u90fd\u6b63\u5e38\uff0c\u5426\u5219\u53ef\u80fd\u628a\u81ea\u5df1\u9501\u5728\u670d\u52a1\u5668\u5916\u9762\u3002<\/p>\n<p>\u5982\u679c\u4f60\u7684\u670d\u52a1\u5668\u4e4b\u524d\u505a\u8fc7 <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/container-security-hardening\/\">\u5bb9\u5668\u5b89\u5168\u52a0\u56fa<\/a>\uff0c\u9632\u706b\u5899\u57fa\u7ebf\u548c\u5b83\u662f\u4e92\u8865\u7684\u4e24\u5c42\u9632\u62a4\uff1a\u5bb9\u5668\u52a0\u56fa\u9650\u5236\u5bb9\u5668\u5185\u8fdb\u7a0b\u6743\u9650\uff0c\u9632\u706b\u5899\u9650\u5236\u7f51\u7edc\u5165\u53e3\u3002Hostease \u4e2d\u6587\u535a\u5ba2\u7684 <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/fail2ban-ssh-protection\/\">Fail2ban SSH \u9632\u62a4<\/a>\u8bb2\u52a8\u6001\u5c01\u7981\uff0c\u672c\u6587\u8bb2\u9759\u6001\u57fa\u7ebf\uff0c\u4e24\u8005\u914d\u5408\u624d\u80fd\u5f62\u6210\u5b8c\u6574\u9632\u62a4\u3002<\/p>\n<h2>\u4e00\u3001\u76d8\u70b9\u670d\u52a1\u5668\u5f00\u653e\u7684\u670d\u52a1<\/h2>\n<p>\u914d\u7f6e\u9632\u706b\u5899\u57fa\u7ebf\u524d\uff0c\u5148\u76d8\u70b9\u670d\u52a1\u5668\u4e0a\u5b9e\u9645\u8fd0\u884c\u7684\u670d\u52a1\u548c\u76d1\u542c\u7aef\u53e3\u3002\u5f88\u591a\u670d\u52a1\u5668\u5f00\u653e\u4e86\u4e0d\u5fc5\u8981\u7684\u7aef\u53e3\u5374\u4e0d\u81ea\u77e5\uff0c\u6210\u4e3a\u653b\u51fb\u5165\u53e3\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">ss -tlnp\nnetstat -tlnp<\/pre>\n<p>\u8fd9\u4e2a\u547d\u4ee4\u5217\u51fa\u6240\u6709\u76d1\u542c\u7aef\u53e3\u548c\u5bf9\u5e94\u8fdb\u7a0b\u3002\u5bf9\u7167\u4e1a\u52a1\u9700\u6c42\uff0c\u786e\u8ba4\u54ea\u4e9b\u7aef\u53e3\u662f\u5fc5\u9700\u7684\u3001\u54ea\u4e9b\u662f\u591a\u4f59\u7684\u3002\u5e38\u89c1\u7684\u5b89\u5168\u9690\u60a3\u5305\u62ec\uff1a\u6570\u636e\u5e93\u7aef\u53e3\uff083306\u30015432\uff09\u76f4\u63a5\u66b4\u9732\u516c\u7f51\u3001Redis \u7aef\u53e3\uff086379\uff09\u65e0\u8ba4\u8bc1\u5f00\u653e\u3001\u8c03\u8bd5\u7aef\u53e3\uff08\u5982 8080\u30018888\uff09\u672a\u5173\u95ed\u3002<\/p>\n<p>\u76d8\u70b9\u7ed3\u679c\u5e94\u8be5\u5f62\u6210\u4e00\u4e2a&#8221;\u5141\u8bb8\u7aef\u53e3\u6e05\u5355&#8221;\uff0c\u4f8b\u5982\uff1a80\/443\uff08Web \u670d\u52a1\uff09\u300122\uff08SSH \u7ba1\u7406\uff09\u30013306\uff08\u4ec5\u9650\u5185\u7f51\u6570\u636e\u5e93\u8fde\u63a5\uff09\u3002\u6e05\u5355\u4e4b\u5916\u7684\u6240\u6709\u7aef\u53e3\u90fd\u5e94\u9ed8\u8ba4\u62d2\u7edd\u3002\u628a\u8fd9\u5f20\u6e05\u5355\u5199\u5165\u8fd0\u7ef4\u6587\u6863\uff0c\u4f5c\u4e3a\u9632\u706b\u5899\u57fa\u7ebf\u7684\u4f9d\u636e\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/08\/cloud-server-firewall-baseline-flow.webp\" alt=\"\u7aef\u53e3\u76d8\u70b9\u4e0e\u57fa\u7ebf\u6d41\u7a0b\" loading=\"lazy\" \/><\/p>\n<h2>\u4e8c\u3001\u914d\u7f6e\u9632\u706b\u5899\u57fa\u7ebf<\/h2>\n<p>\u4e91\u670d\u52a1\u5668\u7684\u9632\u706b\u5899\u914d\u7f6e\u65b9\u5f0f\u6709\u51e0\u79cd\uff1a\u5b89\u5168\u7ec4\uff08\u4e91\u5e73\u53f0\u63a7\u5236\u9762\u677f\uff09\u3001ufw\uff08Ubuntu\uff09\u3001firewalld\uff08CentOS\uff09\u3001iptables\uff08\u5e95\u5c42\uff09\u3002\u63a8\u8350\u7528\u4e91\u5e73\u53f0\u5b89\u5168\u7ec4 + \u672c\u5730\u9632\u706b\u5899\u53cc\u4fdd\u9669\u3002<\/p>\n<p>\u4ee5 ufw \u4e3a\u4f8b\uff0c\u914d\u7f6e\u57fa\u7ebf\u5982\u4e0b\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">ufw default deny incoming\nufw default allow outgoing\nufw allow 22\/tcp\nufw allow 80\/tcp\nufw allow 443\/tcp\nufw enable<\/pre>\n<p>ufw default deny incoming \u8868\u793a\u9ed8\u8ba4\u62d2\u7edd\u6240\u6709\u5165\u7ad9\u6d41\u91cf\uff0c\u53ea\u6709\u663e\u5f0f\u653e\u884c\u7684\u7aef\u53e3\uff0822\u300180\u3001443\uff09\u53ef\u4ee5\u8bbf\u95ee\u3002default allow outgoing \u8ba9\u670d\u52a1\u5668\u4e3b\u52a8\u53d1\u51fa\u7684\u8bf7\u6c42\u4e0d\u53d7\u9650\u5236\u3002<\/p>\n<p>\u5982\u679c\u4f7f\u7528\u4e91\u5e73\u53f0\u5b89\u5168\u7ec4\uff0c\u5efa\u8bae\u628a SSH\uff0822\uff09\u7aef\u53e3\u4ec5\u9650\u5236\u4e3a\u7ba1\u7406\u5458\u7684\u529e\u516c IP\uff0c\u800c\u4e0d\u662f\u5bf9\u5168\u7f51\u5f00\u653e\u3002\u8fd9\u6837\u5373\u4f7f SSH \u5bc6\u7801\u6216\u5bc6\u94a5\u6cc4\u9732\uff0c\u5916\u90e8 IP \u4e5f\u65e0\u6cd5\u8fde\u63a5\u3002\u6570\u636e\u5e93\u7aef\u53e3\uff08\u5982 3306\uff09\u5728\u5b89\u5168\u7ec4\u5c42\u9762\u53ea\u653e\u884c\u5e94\u7528\u670d\u52a1\u5668\u5185\u7f51 IP\uff0c\u4e0d\u76f4\u63a5\u66b4\u9732\u516c\u7f51\u3002<\/p>\n<h2>\u4e09\u3001\u9650\u5236\u7ba1\u7406\u5165\u53e3<\/h2>\n<p>\u7ba1\u7406\u5165\u53e3\uff08SSH\u3001\u6570\u636e\u5e93\u3001\u7ba1\u7406\u540e\u53f0\uff09\u662f\u6700\u9700\u8981\u4e25\u683c\u9650\u5236\u7684\u3002\u5bf9 SSH \u505a\u4e09\u5c42\u9632\u62a4\uff1a\u4ec5\u9650\u6765\u6e90 IP\u3001\u4f7f\u7528\u5bc6\u94a5\u8ba4\u8bc1\u3001\u914d\u5408 Fail2ban \u52a8\u6001\u5c01\u7981\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\"># \/etc\/ssh\/sshd_config\nPermitRootLogin no\nPasswordAuthentication no\nAllowUsers admin@1.2.3.4<\/pre>\n<p>PermitRootLogin no \u7981\u6b62 root \u76f4\u63a5\u767b\u5f55\uff0cPasswordAuthentication no \u7981\u6b62\u5bc6\u7801\u767b\u5f55\u5f3a\u5236\u7528\u5bc6\u94a5\uff0cAllowUsers \u9650\u5236\u53ea\u6709\u6307\u5b9a\u7528\u6237\u4ece\u6307\u5b9a IP \u624d\u80fd\u767b\u5f55\u3002\u8fd9\u4e09\u6761\u914d\u7f6e\u80fd\u5927\u5e45\u964d\u4f4e SSH \u88ab\u66b4\u529b\u7834\u89e3\u7684\u98ce\u9669\u3002<\/p>\n<p>\u5bf9\u4e8e\u6570\u636e\u5e93\u548c Redis \u7b49\u6570\u636e\u670d\u52a1\uff0c\u7edd\u4e0d\u76f4\u63a5\u66b4\u9732\u516c\u7f51\u3002\u5982\u679c\u5e94\u7528\u548c\u6570\u636e\u5e93\u5728\u540c\u4e00\u53f0\u670d\u52a1\u5668\uff0c\u76d1\u542c 127.0.0.1 \u5373\u53ef\uff1b\u5982\u679c\u5206\u673a\u90e8\u7f72\uff0c\u901a\u8fc7\u5185\u7f51\u5730\u5740\u8fde\u63a5\u5e76\u5728\u5b89\u5168\u7ec4\u9650\u5236\u6765\u6e90 IP\u3002\u914d\u7f6e <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/redis-persistence-recovery\/\">Redis \u6301\u4e45\u5316<\/a>\u670d\u52a1\u65f6\uff0cRedis \u9ed8\u8ba4\u76d1\u542c\u6240\u6709\u63a5\u53e3\uff0c\u5fc5\u987b\u6539\u6210\u7ed1\u5b9a\u5185\u7f51\u6216\u672c\u5730\u5730\u5740\uff0c\u5426\u5219\u65e0\u8ba4\u8bc1\u7684 Redis \u4f1a\u88ab\u516c\u7f51\u626b\u63cf\u653b\u51fb\u3002<\/p>\n<h2>\u56db\u3001\u53d8\u66f4\u524d\u4fdd\u7559\u56de\u6eda\u8def\u5f84<\/h2>\n<p>\u9632\u706b\u5899\u53d8\u66f4\u6700\u6015\u628a\u81ea\u5df1\u9501\u5728\u5916\u9762\u3002\u6bcf\u6b21\u53d8\u66f4\u524d\u5148\u521b\u5efa\u5feb\u7167\uff0c\u914d\u7f6e\u53d8\u66f4\u540e\u7acb\u5373\u9a8c\u8bc1\uff0c\u5f02\u5e38\u65f6\u80fd\u5feb\u901f\u56de\u6eda\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\"># \u53d8\u66f4\u524d\u5907\u4efd\u5f53\u524d\u89c4\u5219\nufw status numbered > \/root\/ufw-backup-$(date +%Y%m%d).txt\n # \u53d8\u66f4\u540e\u9a8c\u8bc1 SSH \u8fd8\u6b63\u5e38\nssh -o ConnectTimeout=5 admin@\u4f60\u7684IP echo \"alive\"<\/pre>\n<p>\u5728\u4e91\u5e73\u53f0\u63a7\u5236\u9762\u677f\uff0c\u6bcf\u6b21\u9632\u706b\u5899\u53d8\u66f4\u524d\u5148\u521b\u5efa\u670d\u52a1\u5668\u5feb\u7167\u3002\u5feb\u7167\u53ef\u4ee5\u5728\u89c4\u5219\u5199\u9519\u5bfc\u81f4\u65e0\u6cd5\u8fde\u63a5\u65f6\uff0c\u901a\u8fc7\u63a7\u5236\u53f0\u7684 VNC\uff08\u8fdc\u7a0b\u63a7\u5236\u53f0\uff09\u6216\u5feb\u7167\u56de\u6eda\u6062\u590d\u3002\u5f88\u591a\u8fd0\u7ef4\u4e8b\u6545\u5c31\u662f\u6539\u9632\u706b\u5899\u89c4\u5219\u65f6\u6ca1\u7559\u540e\u8def\uff0c\u628a\u81ea\u5df1\u9501\u5728\u670d\u52a1\u5668\u5916\u9762\u3002<\/p>\n<p>\u5bf9\u4e8e\u4f7f\u7528 iptables \u7684\u573a\u666f\uff0c\u89c4\u5219\u53d8\u66f4\u524d\u4fdd\u5b58\u5f53\u524d\u89c4\u5219\u5230\u6587\u4ef6\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">iptables-save > \/root\/iptables-backup-$(date +%Y%m%d).txt\n # \u5f02\u5e38\u65f6\u6062\u590d\niptables-restore < \/root\/iptables-backup-$(date +%Y%m%d).txt<\/pre>\n<p>\u5efa\u8bae\u5728\u53d8\u66f4\u65f6\u4fdd\u7559\u4e00\u6761\"\u9003\u751f\u901a\u9053\"\uff1a\u4e0d\u76f4\u63a5\u65ad\u5f00\u5f53\u524d SSH \u8fde\u63a5\uff0c\u5148\u5728\u4e00\u4e2a\u65b0\u7ec8\u7aef\u6d4b\u8bd5\u65b0\u89c4\u5219\u662f\u5426\u653e\u884c\uff0c\u786e\u8ba4\u540e\u518d\u65ad\u5f00\u65e7\u8fde\u63a5\u3002\u5982\u679c\u6d4b\u8bd5\u5931\u8d25\uff0c\u5f53\u524d SSH \u8fde\u63a5\u4ecd\u7136\u6709\u6548\uff0c\u53ef\u4ee5\u7acb\u5373\u56de\u6eda\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/08\/cloud-server-firewall-baseline-comparison.webp\" alt=\"\u9632\u706b\u5899\u57fa\u7ebf\u56de\u6eda\u6d41\u7a0b\" loading=\"lazy\" \/><\/p>\n<h2>\u4e94\u3001\u9a8c\u8bc1\u4e0e\u76d1\u63a7<\/h2>\n<p>\u9632\u706b\u5899\u57fa\u7ebf\u914d\u7f6e\u5b8c\u6210\u540e\uff0c\u9a8c\u8bc1\u4e09\u4e2a\u5c42\u9762\uff1a\u7aef\u53e3\u5f00\u653e\u60c5\u51b5\u3001\u5916\u90e8\u53ef\u8fbe\u6027\u3001\u7ba1\u7406\u5165\u53e3\u53ef\u7528\u6027\u3002\u7528 nmap \u4ece\u5916\u90e8\u626b\u63cf\u786e\u8ba4\u53ea\u6709\u9884\u671f\u7aef\u53e3\u5f00\u653e\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">nmap -sS -p 1-65535 \u4f60\u7684\u670d\u52a1\u5668IP<\/pre>\n<p>\u626b\u63cf\u7ed3\u679c\u5e94\u53ea\u663e\u793a\u5141\u8bb8\u7684\u7aef\u53e3\uff0822\u300180\u3001443\uff09\u3002\u5982\u679c\u51fa\u73b0\u610f\u5916\u5f00\u653e\u7aef\u53e3\uff0c\u8bf4\u660e\u8fd8\u6709\u670d\u52a1\u66b4\u9732\u6216\u9632\u706b\u5899\u89c4\u5219\u914d\u7f6e\u9519\u8bef\u3002\u540c\u65f6\u9a8c\u8bc1\u4ece\u5916\u90e8\u5c1d\u8bd5\u8fde\u63a5\u672a\u5f00\u653e\u7aef\u53e3\u4f1a\u88ab\u62d2\u7edd\uff08\u8fd4\u56de filtered \u6216 timeout\uff09\u3002<\/p>\n<p>\u76d1\u63a7\u65b9\u9762\uff0c\u5b9a\u671f\u626b\u63cf\u5e76\u8bb0\u5f55\u7aef\u53e3\u5f00\u653e\u60c5\u51b5\uff0c\u5bf9\u6bd4\u57fa\u7ebf\u53d8\u5316\u3002\u5982\u679c\u53d1\u73b0\u65b0\u589e\u5f00\u653e\u7aef\u53e3\uff0c\u5e94\u7acb\u5373\u6392\u67e5\u662f\u5426\u88ab\u653b\u7834\u3002\u9632\u706b\u5899\u65e5\u5fd7\u4e5f\u80fd\u53cd\u6620\u653b\u51fb\u5c1d\u8bd5\uff1a\u5927\u91cf SYN 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