{"id":68739,"date":"2025-06-01T10:00:18","date_gmt":"2025-06-01T02:00:18","guid":{"rendered":"https:\/\/fwq.ai\/blog\/?p=68739"},"modified":"2025-06-01T10:00:18","modified_gmt":"2025-06-01T02:00:18","slug":"%e5%85%a8%e9%9d%a2%e8%a7%a3%e6%9e%90iptables%e9%98%b2%e7%81%ab%e5%a2%99%e6%9c%ba%e5%88%b6%e4%b8%8e%e7%bd%91%e7%bb%9c%e5%ae%89%e5%85%a8%e7%ad%96%e7%95%a5","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/68739\/","title":{"rendered":"\u5168\u9762\u89e3\u6790iptables\u9632\u706b\u5899\u673a\u5236\u4e0e\u7f51\u7edc\u5b89\u5168\u7b56\u7565"},"content":{"rendered":"<h2>\u524d\u8a00<\/h2>\n<p>\u968f\u7740\u7f51\u7edc\u653b\u51fb\u624b\u6bb5\u7684\u65e5\u76ca\u590d\u6742\uff0c\u6784\u5efa\u9ad8\u6548\u53ef\u9760\u7684\u7f51\u7edc\u9632\u5fa1\u4f53\u7cfb\u5df2\u7ecf\u6210\u4e3a\u6bcf\u4e00\u4f4d\u6280\u672f\u4eba\u5458\u548c\u670d\u52a1\u5668\u7528\u6237\u7684\u6838\u5fc3\u4efb\u52a1\u3002\u672c\u6587\u5c06\u4ee5Linux\u7cfb\u7edf\u4e2d\u7684iptables\u4e3a\u6838\u5fc3\uff0c\u6df1\u5165\u8bb2\u89e3\u5176\u7ed3\u6784\u3001\u5de5\u4f5c\u673a\u5236\u53ca\u89c4\u5219\u914d\u7f6e\uff0c\u5e76\u7ed3\u5408\u201c\u7f8e\u56fdvps\u201d\u90e8\u7f72\u5b9e\u4f8b\uff0c\u52a9\u529b\u60a8\u6784\u5efa\u7a33\u56fa\u7684\u7f51\u7edc\u9632\u7ebf\u3002<\/p>\n<h2>\u4e00\u3001\u9632\u706b\u5899\u4e0e\u5165\u4fb5\u9632\u5fa1\u57fa\u7840\u77e5\u8bc6<\/h2>\n<h3>\u9632\u706b\u5899\u7684\u5206\u7c7b\u4e0e\u529f\u80fd\u5b9a\u4f4d<\/h3>\n<p>\u9632\u706b\u5899\u662f\u90e8\u7f72\u5728\u5185\u5916\u7f51\u7edc\u4e4b\u95f4\u7684\u5b89\u5168\u5c4f\u969c\uff0c\u6309\u7167\u90e8\u7f72\u4f4d\u7f6e\u548c\u529f\u80fd\u4e3b\u8981\u53ef\u5212\u5206\u4e3a\u4ee5\u4e0b\u51e0\u7c7b\uff1a<\/p>\n<ul>\n<li><strong>\u4e3b\u673a\u578b\u9632\u706b\u5899<\/strong>\uff1a\u53ea\u4fdd\u62a4\u672c\u673a\u7cfb\u7edf\uff0c\u9002\u7528\u4e8e\u5355\u673a\u73af\u5883\uff1b<\/li>\n<li><strong>\u7f51\u7edc\u578b\u9632\u706b\u5899<\/strong>\uff1a\u90e8\u7f72\u5728\u7f51\u7edc\u8fb9\u7f18\uff0c\u5bf9\u6574\u4e2a\u5b50\u7f51\u6216\u591a\u4e2a\u4e3b\u673a\u8d77\u4fdd\u62a4\u4f5c\u7528\uff1b<\/li>\n<li><strong>\u786c\u4ef6\u9632\u706b\u5899<\/strong>\uff1a\u91c7\u7528\u4e13\u7528\u5904\u7406\u82af\u7247\u5904\u7406\u6570\u636e\u5305\uff0c\u6027\u80fd\u9ad8\uff0c\u9002\u5408\u4f01\u4e1a\u7ea7\u73af\u5883\uff1b<\/li>\n<li><strong>\u5e94\u7528\u5c42\u9632\u706b\u5899<\/strong>\uff1a\u5177\u5907\u4ee3\u7406\u6216\u7f51\u5173\u529f\u80fd\uff0c\u80fd\u9488\u5bf9HTTP\u3001FTP\u7b49\u534f\u8bae\u8fdb\u884c\u6df1\u5ea6\u68c0\u6d4b\u3002<\/li>\n<\/ul>\n<p>\u5728\u9009\u7528\u9ad8\u6027\u80fd\u7f8e\u56fd\u4e91\u670d\u52a1\u5668\u65f6\uff0c\u5efa\u8bae\u914d\u5408\u7f51\u7edc\u578b+\u4e3b\u673a\u578b\u9632\u706b\u5899\u534f\u540c\u90e8\u7f72\uff0c\u5f62\u6210\u5206\u5c42\u9632\u62a4\u4f53\u7cfb\uff0c\u63d0\u5347\u6574\u4f53\u9632\u5fa1\u80fd\u529b\u3002<\/p>\n<h3>\u5165\u4fb5\u68c0\u6d4b\u4e0e\u9632\u5fa1\u7cfb\u7edf\uff08IDS\/IPS\uff09<\/h3>\n<p>\u4e3a\u4e86\u5f25\u8865\u4f20\u7edf\u9632\u706b\u5899\u5bf9\u5e94\u7528\u5c42\u653b\u51fb\u8bc6\u522b\u80fd\u529b\u7684\u4e0d\u8db3\uff0cIDS\u4e0eIPS\u7cfb\u7edf\u5e94\u8fd0\u800c\u751f\uff1a<\/p>\n<ul>\n<li><strong>HIDS\uff08\u4e3b\u673a\u578b\u5165\u4fb5\u68c0\u6d4b\uff09<\/strong>\uff1a\u5982OSSEC\uff0c\u76d1\u63a7\u7cfb\u7edf\u5185\u90e8\u884c\u4e3a\uff1b<\/li>\n<li><strong>NIDS\uff08\u7f51\u7edc\u578b\u5165\u4fb5\u68c0\u6d4b\uff09<\/strong>\uff1a\u5982Snort\uff0c\u5206\u6790\u7f51\u7edc\u6d41\u91cf\uff1b<\/li>\n<li><strong>IPS<\/strong>\uff1a\u662fIDS\u4e0e\u9632\u706b\u5899\u7684\u7ed3\u5408\u4f53\uff0c\u53ef\u81ea\u52a8\u963b\u65ad\u653b\u51fb\u884c\u4e3a\uff1b<\/li>\n<li><strong>\u871c\u7f50\u6280\u672f\uff08Honeypot\uff09<\/strong>\uff1a\u6a21\u62df\u7cfb\u7edf\u8bf1\u6355\u9ed1\u5ba2\u884c\u4e3a\uff0c\u7528\u4e8e\u5a01\u80c1\u6eaf\u6e90\u3002<\/li>\n<\/ul>\n<p>\u90e8\u7f72\u5728\u9ad8\u5e26\u5bbd\u3001\u4f4e\u5ef6\u8fdf\u7684<strong>\u7f8e\u56fd\u670d\u52a1\u5668<\/strong>\u4e0a\uff0c\u53ef\u6709\u6548\u652f\u6301\u9ad8\u5e76\u53d1\u4e0b\u7684\u6df1\u5ea6\u68c0\u6d4b\uff0c\u786e\u4fdd\u7f51\u7edc\u7a33\u5b9a\u3002<\/p>\n<h2>\u4e8c\u3001iptables \u4e0e netfilter \u67b6\u6784\u8be6\u89e3<\/h2>\n<p>iptables \u662f Linux \u7cfb\u7edf\u4e0b\u7684\u547d\u4ee4\u884c\u9632\u706b\u5899\u5de5\u5177\uff0c\u5176\u672c\u8d28\u662f\u5bf9\u5185\u6838 netfilter \u6a21\u5757\u7684\u7528\u6237\u6001\u63a7\u5236\u63a5\u53e3\u3002<\/p>\n<h3>\u6838\u5fc3\u7ec4\u6210\uff1a\u4e94\u6761\u94fe\uff08Hook Functions\uff09<\/h3>\n<p>iptables \u7684\u89c4\u5219\u5339\u914d\u53d1\u751f\u5728\u4ee5\u4e0b5\u4e2a\u7f51\u7edc\u751f\u547d\u5468\u671f\u8282\u70b9\u4e0a\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u94fe\u540d\u79f0<\/th>\n<th>\u63cf\u8ff0<\/th>\n<th>\u53ef\u5426\u8fc7\u6ee4<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>PREROUTING<\/td>\n<td>\u8def\u7531\u51b3\u7b56\u524d\u5904\u7406\u6570\u636e\u5305<\/td>\n<td>\u5426<\/td>\n<\/tr>\n<tr>\n<td>INPUT<\/td>\n<td>\u672c\u673a\u63a5\u6536\u5305\u524d\u5904\u7406<\/td>\n<td>\u662f<\/td>\n<\/tr>\n<tr>\n<td>FORWARD<\/td>\n<td>\u4e2d\u8f6c\u5305\u5904\u7406<\/td>\n<td>\u662f<\/td>\n<\/tr>\n<tr>\n<td>OUTPUT<\/td>\n<td>\u672c\u673a\u53d1\u9001\u5305\u524d\u5904\u7406<\/td>\n<td>\u662f<\/td>\n<\/tr>\n<tr>\n<td>POSTROUTING<\/td>\n<td>\u8def\u7531\u540e\u5904\u7406<\/td>\n<td>\u5426<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5176\u4e2d\uff0c<code>INPUT<\/code>\u3001<code>OUTPUT<\/code>\u3001<code>FORWARD<\/code> \u662f\u5b9e\u73b0\u8bbf\u95ee\u63a7\u5236\u7684\u6838\u5fc3\u94fe\uff0c\u5efa\u8bae\u5728\u7f8e\u56fdvps\u4e2d\u7cbe\u7ec6\u5316\u7ba1\u7406\u89c4\u5219\uff0c\u4ee5\u9632\u6ee5\u7528\u653b\u51fb\u3002<\/p>\n<h3>\u56db\u5927\u529f\u80fd\u8868\uff08tables\uff09<\/h3>\n<p>iptables \u5229\u7528\u56db\u5f20\u8868\u5206\u522b\u5b8c\u6210\u4e0d\u540c\u529f\u80fd\uff1a<\/p>\n<ul>\n<li><strong>filter<\/strong>\uff1a\u9ed8\u8ba4\u8868\uff0c\u6267\u884c\u5305\u8fc7\u6ee4\u64cd\u4f5c\uff1b<\/li>\n<li><strong>nat<\/strong>\uff1a\u8fdb\u884c\u5730\u5740\u8f6c\u6362\uff08SNAT\u3001DNAT\u3001MASQUERADE\uff09\uff1b<\/li>\n<li><strong>mangle<\/strong>\uff1a\u5bf9\u62a5\u6587\u8fdb\u884c\u4fee\u6539\uff0c\u4f8b\u5982QoS\u6807\u8bb0\uff1b<\/li>\n<li><strong>raw<\/strong>\uff1a\u7528\u4e8e\u5173\u95ed\u8fde\u63a5\u8ddf\u8e2a\uff0c\u52a0\u901f\u9ad8\u5e76\u53d1\u8bbf\u95ee\u5904\u7406\u3002<\/li>\n<\/ul>\n<h2>\u4e09\u3001iptables \u89c4\u5219\u7684\u5339\u914d\u4e0e\u6267\u884c\u673a\u5236<\/h2>\n<h3>\u5339\u914d\u6d41\u7a0b\u4e0e\u4f18\u5148\u7ea7<\/h3>\n<p>\u6570\u636e\u5305\u8fdb\u5165\u9632\u706b\u5899\u540e\uff0c\u5c06\u4f9d\u6b21\u5339\u914d\u76f8\u5e94\u94fe\u548c\u8868\u4e2d\u7684\u89c4\u5219\u3002iptables \u4f9d\u636e\u89c4\u5219\u5339\u914d\u987a\u5e8f\u5bf9\u6570\u636e\u5305\u505a\u51fa\u5904\u7406\uff1a<\/p>\n<ul>\n<li><strong>\u6761\u4ef6<\/strong>\uff1a\u5339\u914dIP\u5730\u5740\u3001\u7aef\u53e3\u3001\u534f\u8bae\u7c7b\u578b\u7b49\uff1b<\/li>\n<li><strong>\u52a8\u4f5c<\/strong>\uff1a\u5982 DROP\uff08\u4e22\u5f03\uff09\u3001ACCEPT\uff08\u653e\u884c\uff09\u3001REJECT\uff08\u660e\u786e\u62d2\u7edd\uff09\u3001LOG\uff08\u8bb0\u5f55\uff09\u7b49\uff1b<\/li>\n<li><strong>NAT\u64cd\u4f5c<\/strong>\uff1aSNAT\u3001DNAT\u3001\u7aef\u53e3\u91cd\u5b9a\u5411\uff08REDIRECT\uff09\u7b49\u3002<\/li>\n<\/ul>\n<p>\u5efa\u8bae\u5bf9<strong>\u9ad8\u9891\u8bbf\u95ee\u7684\u7f8e\u56fd\u4e91\u670d\u52a1\u5668<\/strong>\u914d\u7f6e\u7cbe\u7b80\u3001\u9ad8\u6548\u7684\u89c4\u5219\u96c6\uff0c\u540c\u65f6\u5f00\u542f\u65e5\u5fd7\u5ba1\u8ba1\u529f\u80fd\u4ee5\u4fbf\u5b9e\u65f6\u76d1\u63a7\u3002<\/p>\n<h3>\u7b56\u7565\u89c4\u5212\uff1a\u901a\u4e0e\u5835<\/h3>\n<ul>\n<li><strong>\u767d\u540d\u5355\u7b56\u7565\uff08\u901a\uff09<\/strong>\uff1a\u9ed8\u8ba4\u62d2\u7edd\uff0c\u53ea\u5141\u8bb8\u53ef\u4fe1\u6765\u6e90\u8bbf\u95ee\uff1b<\/li>\n<li><strong>\u9ed1\u540d\u5355\u7b56\u7565\uff08\u5835\uff09<\/strong>\uff1a\u9ed8\u8ba4\u5141\u8bb8\uff0c\u5c01\u9501\u7279\u5b9a\u6076\u610fIP\u6216\u884c\u4e3a\u3002<\/li>\n<\/ul>\n<p>\u7ed3\u5408\u5b9e\u9645\u4e1a\u52a1\u573a\u666f\u7075\u6d3b\u9009\u62e9\uff0c\u5c24\u5176\u5728\u7f8e\u56fd\u670d\u52a1\u5668\u627f\u8f7d\u591a\u7528\u6237\u670d\u52a1\u65f6\uff0c\u66f4\u5e94\u9075\u5faa\u201c\u901a\u7528\u963b\u65ad+\u5b9a\u5411\u653e\u884c\u201d\u7684\u65b9\u5f0f\uff0c\u4fdd\u969c\u6027\u80fd\u4e0e\u5b89\u5168\u5e76\u91cd\u3002<\/p>\n<h2>\u56db\u3001iptables \u89c4\u5219\u7684\u57fa\u672c\u64cd\u4f5c\u4e0e\u8bed\u6cd5<\/h2>\n<p>\u4ee5\u4e0b\u4e3a\u5e38\u89c1\u89c4\u5219\u914d\u7f6e\u547d\u4ee4\uff1a<\/p>\n<pre><code class=\"language-bash\"># \u521b\u5efa\u94fe\r\niptables -N custom-chain\r\n\r\n# \u8bbe\u7f6e\u9ed8\u8ba4\u7b56\u7565\r\niptables -P INPUT DROP\r\niptables -P FORWARD DROP\r\niptables -P OUTPUT ACCEPT\r\n\r\n# \u6dfb\u52a0\u5141\u8bb8SSH\u8bbf\u95ee\u89c4\u5219\r\niptables -A INPUT -p tcp --dport 22 -j ACCEPT\r\n\r\n# \u67e5\u770b\u89c4\u5219\r\niptables -L -n -v\r\n<\/code><\/pre>\n<p>\u5728\u4f7f\u7528\u7f8e\u56fd\u670d\u52a1\u5668\u8fdb\u884cWeb\u670d\u52a1\u90e8\u7f72\u65f6\uff0c\u63a8\u8350\u4ec5\u5f00\u653e80\/443\u7aef\u53e3\uff0c\u5176\u4f59\u7aef\u53e3\u9ed8\u8ba4\u5173\u95ed\uff0c\u4ee5\u51cf\u5c11\u653b\u51fb\u9762\u3002<\/p>\n<h2>\u4e94\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u73af\u5883\u4e0b\u7684\u7f51\u7edc\u5b89\u5168\u5b9e\u8df5\u5efa\u8bae<\/h2>\n<ul>\n<li>\u9009\u7528\u5177\u5907DDoS\u9632\u62a4\u80fd\u529b\u7684<strong>\u7f8e\u56fdvps<\/strong>\uff0c\u63d0\u5347\u6297\u538b\u80fd\u529b\uff1b<\/li>\n<li>\u5f00\u542f\u9632\u706b\u5899\u65e5\u5fd7\u529f\u80fd\uff0c\u914d\u5408 fail2ban 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