{"id":43154,"date":"2024-10-04T19:06:52","date_gmt":"2024-10-04T11:06:52","guid":{"rendered":"https:\/\/server.hk\/cnblog\/43154\/"},"modified":"2024-10-04T19:06:52","modified_gmt":"2024-10-04T11:06:52","slug":"centos-7-%e9%85%8d%e7%bd%ae-iptables","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/43154\/","title":{"rendered":"CentOS 7 \u914d\u7f6e iptables"},"content":{"rendered":"<h1 id=\"centos-7-%e9%85%8d%e7%bd%ae-iptables-jhLXEICYEy\">CentOS 7 \u914d\u7f6e iptables<\/h1>\n<p>\u5728\u4f3a\u670d\u5668\u7ba1\u7406\u4e2d\uff0c\u9632\u706b\u7246\u662f\u4fdd\u8b77\u7cfb\u7d71\u5b89\u5168\u7684\u91cd\u8981\u7d44\u4ef6\u3002CentOS 7 \u9810\u8a2d\u4f7f\u7528 <code>firewalld<\/code> \u4f5c\u70ba\u9632\u706b\u7246\u7ba1\u7406\u5de5\u5177\uff0c\u4f46\u8a31\u591a\u7528\u6236\u4ecd\u7136\u504f\u597d\u4f7f\u7528\u50b3\u7d71\u7684 <code>iptables<\/code> \u4f86\u9032\u884c\u66f4\u7d30\u7dfb\u7684\u63a7\u5236\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728 CentOS 7 \u4e2d\u914d\u7f6e <code>iptables<\/code>\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-iptables%ef%bc%9f-jhLXEICYEy\">\u4ec0\u9ebc\u662f iptables\uff1f<\/h2>\n<p><code>iptables<\/code> \u662f Linux \u7cfb\u7d71\u4e2d\u7684\u4e00\u500b\u7528\u65bc\u8a2d\u7f6e\u3001\u7dad\u8b77\u548c\u6aa2\u67e5 IP \u5c01\u5305\u904e\u6ffe\u898f\u5247\u7684\u5de5\u5177\u3002\u5b83\u5141\u8a31\u7528\u6236\u5b9a\u7fa9\u54ea\u4e9b\u6d41\u91cf\u53ef\u4ee5\u9032\u5165\u6216\u96e2\u958b\u7cfb\u7d71\uff0c\u5f9e\u800c\u589e\u5f37\u4f3a\u670d\u5668\u7684\u5b89\u5168\u6027\u3002<\/p>\n<h2 id=\"%e5%ae%89%e8%a3%9d-iptables-jhLXEICYEy\">\u5b89\u88dd iptables<\/h2>\n<p>\u5728 CentOS 7 \u4e2d\uff0c<code>iptables<\/code> \u901a\u5e38\u9810\u8a2d\u5df2\u5b89\u88dd\uff0c\u4f46\u5982\u679c\u9700\u8981\u91cd\u65b0\u5b89\u88dd\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>sudo yum install iptables-services<\/code><\/pre>\n<h2 id=\"%e5%95%9f%e7%94%a8-iptables-jhLXEICYEy\">\u555f\u7528 iptables<\/h2>\n<p>\u5b89\u88dd\u5b8c\u6210\u5f8c\uff0c\u60a8\u9700\u8981\u555f\u7528 <code>iptables<\/code> \u670d\u52d9\uff0c\u4e26\u8a2d\u7f6e\u5176\u5728\u7cfb\u7d71\u555f\u52d5\u6642\u81ea\u52d5\u555f\u52d5\uff1a<\/p>\n<pre><code>sudo systemctl start iptables\nsudo systemctl enable iptables<\/code><\/pre>\n<h2 id=\"%e9%85%8d%e7%bd%ae-iptables-%e8%a6%8f%e5%89%87-jhLXEICYEy\">\u914d\u7f6e iptables \u898f\u5247<\/h2>\n<p>\u914d\u7f6e <code>iptables<\/code> \u898f\u5247\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>iptables -A [CHAIN] -p [PROTOCOL] --dport [PORT] -j [TARGET]<\/code><\/pre>\n<ul>\n<li><strong>CHAIN<\/strong>: \u53ef\u4ee5\u662f <code>INPUT<\/code>\u3001<code>OUTPUT<\/code> \u6216 <code>FORWARD<\/code>\u3002<\/li>\n<li><strong>PROTOCOL<\/strong>: \u901a\u5e38\u662f <code>tcp<\/code> \u6216 <code>udp<\/code>\u3002<\/li>\n<li><strong>PORT<\/strong>: \u6307\u5b9a\u7684\u7aef\u53e3\u865f\u3002<\/li>\n<li><strong>TARGET<\/strong>: \u53ef\u4ee5\u662f <code>ACCEPT<\/code> \u6216 <code>DROP<\/code>\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e5%85%81%e8%a8%b1-ssh-%e9%80%a3%e6%8e%a5-jhLXEICYEy\">\u7bc4\u4f8b\uff1a\u5141\u8a31 SSH \u9023\u63a5<\/h3>\n<p>\u5982\u679c\u60a8\u5e0c\u671b\u5141\u8a31 SSH \u9023\u63a5\uff08\u9810\u8a2d\u7aef\u53e3\u70ba 22\uff09\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>iptables -A INPUT -p tcp --dport 22 -j ACCEPT<\/code><\/pre>\n<h3 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e9%98%bb%e6%93%8b%e7%89%b9%e5%ae%9a-ip-jhLXEICYEy\">\u7bc4\u4f8b\uff1a\u963b\u64cb\u7279\u5b9a IP<\/h3>\n<p>\u5982\u679c\u60a8\u60f3\u8981\u963b\u64cb\u4f86\u81ea\u7279\u5b9a IP \u5730\u5740\u7684\u6d41\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>iptables -A INPUT -s [BLOCKED_IP] -j DROP<\/code><\/pre>\n<h3 id=\"%e4%bf%9d%e5%ad%98%e5%92%8c%e6%81%a2%e5%be%a9-iptables-%e8%a6%8f%e5%89%87-jhLXEICYEy\">\u4fdd\u5b58\u548c\u6062\u5fa9 iptables \u898f\u5247<\/h3>\n<p>\u914d\u7f6e\u5b8c\u6210\u5f8c\uff0c\u60a8\u9700\u8981\u4fdd\u5b58\u898f\u5247\uff0c\u4ee5\u4fbf\u5728\u7cfb\u7d71\u91cd\u555f\u5f8c\u81ea\u52d5\u52a0\u8f09\uff1a<\/p>\n<pre><code>service iptables save<\/code><\/pre>\n<p>\u8981\u6062\u5fa9\u4e4b\u524d\u4fdd\u5b58\u7684\u898f\u5247\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>service iptables restart<\/code><\/pre>\n<h2 id=\"%e6%aa%a2%e6%9f%a5-iptables-%e8%a6%8f%e5%89%87-jhLXEICYEy\">\u6aa2\u67e5 iptables \u898f\u5247<\/h2>\n<p>\u8981\u67e5\u770b\u7576\u524d\u7684 <code>iptables<\/code> \u898f\u5247\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>iptables -L -n -v<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-jhLXEICYEy\">\u7e3d\u7d50<\/h2>\n<p>\u5728 CentOS 7 \u4e2d\u914d\u7f6e <code>iptables<\/code> \u662f\u4e00\u500b\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u589e\u5f37\u4f3a\u670d\u5668\u7684\u5b89\u5168\u6027\u3002\u900f\u904e\u8a2d\u7f6e\u9069\u7576\u7684\u898f\u5247\uff0c\u60a8\u53ef\u4ee5\u63a7\u5236\u9032\u51fa\u4f3a\u670d\u5668\u7684\u6d41\u91cf\uff0c\u5f9e\u800c\u4fdd\u8b77\u60a8\u7684\u7cfb\u7d71\u4e0d\u53d7\u672a\u7d93\u6388\u6b0a\u7684\u8a2a\u554f\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u5b89\u5168\u6027\u7684\u74b0\u5883\uff0c\u5efa\u8b70\u5b9a\u671f\u6aa2\u67e5\u548c\u66f4\u65b0\u9019\u4e9b\u898f\u5247\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\uff0c\u7121\u8ad6\u662f\u500b\u4eba\u9805\u76ee\u9084\u662f\u5546\u696d\u61c9\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to configure iptables on CentOS 7 to enhance your server&#8217;s security with effective firewall rules and management techniques.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-43154","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/43154","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=43154"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/43154\/revisions"}],"predecessor-version":[{"id":43155,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/43154\/revisions\/43155"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=43154"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=43154"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=43154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}