{"id":61717,"date":"2025-04-29T10:40:21","date_gmt":"2025-04-29T02:40:21","guid":{"rendered":"https:\/\/fwq.ai\/blog\/61717\/"},"modified":"2025-04-29T10:40:21","modified_gmt":"2025-04-29T02:40:21","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8linux%e4%b8%8a%e9%85%8d%e7%bd%aenat%e7%bd%91%e5%85%b3-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/61717\/","title":{"rendered":"\u5982\u4f55\u5728Linux\u4e0a\u914d\u7f6eNAT\u7f51\u5173"},"content":{"rendered":"<p>\u5982\u4f55\u5728\u4e0a\u914d\u7f6enat\u7f51\u5173<\/p>\n<p>\u5bfc\u8bed\uff1a\u5728Linux\u64cd\u4f5c\u7cfb\u7edf\u4e0a\u914d\u7f6eNAT\uff08\u7f51\u7edc\u5730\u5740\u8f6c\u6362\uff09\u7f51\u5173\u662f\u4e00\u9879\u975e\u5e38\u5e38\u89c1\u7684\u4efb\u52a1\u3002NAT\u7f51\u5173\u5141\u8bb8\u591a\u4e2a\u4e3b\u673a\u901a\u8fc7\u5171\u4eab\u5355\u4e2a\u516c\u5171IP\u5730\u5740\u6765\u8bbf\u95eeInternet\u3002 \u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u63a2\u8ba8\u5982\u4f55\u5728linux\u4e0a\u914d\u7f6enat\u7f51\u5173\uff0c\u5e76\u9644\u4e0a\u76f8\u5e94\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u5e2e\u52a9\u8bfb\u8005\u4e00\u6b65\u6b65\u5b8c\u6210\u914d\u7f6e\u8fc7\u7a0b\u3002<\/p>\n<p>NAT\u7f51\u5173\u662f\u4e00\u79cd\u7f51\u7edc\u6280\u672f\uff0c\u5141\u8bb8\u4f4d\u4e8e\u79c1\u6709\u7f51\u7edc\u4e2d\u7684\u591a\u4e2a\u4e3b\u673a\u901a\u8fc7\u5355\u4e2a\u516c\u5171IP\u5730\u5740\u8fdb\u884cInternet\u8bbf\u95ee\u3002\u5b83\u5728\u79c1\u6709\u7f51\u7edc\u548c\u516c\u5171\u7f51\u7edc\u4e4b\u95f4\u67b6\u8bbe\u4e86\u4e00\u5ea7\u6865\u6881\uff0c\u4e3a\u5185\u90e8\u7f51\u7edc\u63d0\u4f9b\u4e86\u4e00\u5b9a\u7684\u5b89\u5168\u6027\u548c\u7f51\u7edc\u5730\u5740\u8f6c\u6362\u529f\u80fd\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u5728Linux\u4e0a\u914d\u7f6eNAT\u7f51\u5173\u7684\u6b65\u9aa4\uff1a<\/p>\n<p>\u6b65\u9aa41\uff1a\u68c0\u67e5Linux\u5185\u6838\u53c2\u6570<br \/>\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u786e\u4fddLinux\u5185\u6838\u53c2\u6570\u5df2\u6b63\u786e\u914d\u7f6e\u4ee5\u5141\u8bb8IP\u8f6c\u53d1\u3002IP\u8f6c\u53d1\u662f\u6307\u5141\u8bb8\u6570\u636e\u5728\u4e24\u4e2a\u7f51\u7edc\u63a5\u53e3\u4e4b\u95f4\u8fdb\u884c\u8f6c\u53d1\u7684\u80fd\u529b\u3002\u901a\u8fc7\u4ee5\u4e0b\u547d\u4ee4\u53ef\u4ee5\u68c0\u67e5\u5185\u6838\u53c2\u6570\uff1a<\/p>\n<pre>$ sysctl net.ipv4.ip_forward<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5982\u679c\u8f93\u51fa\u7ed3\u679c\u4e3a\u201c1\u201d\uff0c\u5219\u8868\u793a\u5185\u6838\u5df2\u5f00\u542fIP\u8f6c\u53d1\u529f\u80fd\u3002\u5982\u679c\u8f93\u51fa\u7ed3\u679c\u4e3a\u201c0\u201d\uff0c\u5219\u9700\u8981\u8fdb\u884c\u4ee5\u4e0b\u6b65\u9aa4\u6765\u542f\u7528IP\u8f6c\u53d1\u529f\u80fd\uff1a<\/p>\n<pre>$ sudo sysctl -w net.ipv4.ip_forward=1<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u6b65\u9aa42\uff1a\u914d\u7f6e\u7f51\u7edc\u63a5\u53e3<br \/>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u9700\u8981\u4e3a\u7f51\u7edc\u63a5\u53e3\u914d\u7f6eIP\u5730\u5740\u548c\u5b50\u7f51\u63a9\u7801\u3002\u901a\u5e38\uff0cNAT\u7f51\u5173\u6709\u4e24\u4e2a\u7f51\u7edc\u63a5\u53e3\uff0c\u4e00\u4e2a\u8fde\u63a5\u5230\u516c\u5171\u7f51\u7edc\uff08\u4f8b\u5982Internet\uff09\uff0c\u53e6\u4e00\u4e2a\u8fde\u63a5\u5230\u79c1\u6709\u7f51\u7edc\uff08\u4f8b\u5982\u5c40\u57df\u7f51\uff09\u3002\u5047\u8bbeeth0\u8fde\u63a5\u5230\u516c\u5171\u7f51\u7edc\uff0ceth1\u8fde\u63a5\u5230\u79c1\u6709\u7f51\u7edc\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u914d\u7f6e\u7f51\u7edc\u63a5\u53e3\uff1a<\/p>\n<pre>$ sudo ifconfig eth0  netmask \n$ sudo ifconfig eth1  netmask <\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>$ sudo ifconfig eth0 192.168.0.100 netmask 255.255.255.0\n$ sudo ifconfig eth1 10.0.0.1 netmask 255.255.255.0<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u6b65\u9aa43\uff1a\u8bbe\u7f6e\u7f51\u7edc\u5730\u5740\u8f6c\u6362\u89c4\u5219<br \/>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u9700\u8981\u8bbe\u7f6e\u7f51\u7edc\u5730\u5740\u8f6c\u6362\u89c4\u5219\u3002\u4f7f\u7528iptables\u5de5\u5177\u53ef\u4ee5\u65b9\u4fbf\u5730\u8bbe\u7f6e\u8f6c\u53d1\u89c4\u5219\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684iptables\u547d\u4ee4\uff1a<\/p>\n<ol>\n<li>\u542f\u7528IP\u8f6c\u53d1\uff1a<\/li>\n<\/ol>\n<pre>$ sudo iptables -A FORWARD -o eth0 -i eth1 -s 10.0.0.0\/24 -m conntrack --ctstate NEW -j ACCEPT\n$ sudo iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT\n$ sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4e0a\u8ff0\u547d\u4ee4\u5206\u522b\u8fdb\u884c\u4e86\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li>\u5141\u8bb8\u4eceeth1\u63a5\u53e3\u4e2d\u7684\u79c1\u6709IP\u5730\u5740\u8bbf\u95eeeth0\u63a5\u53e3\u4e2d\u7684\u516c\u5171IP\u5730\u5740<\/li>\n<li>\u5141\u8bb8\u5df2\u5efa\u7acb\u7684\u548c\u76f8\u5173\u7684\u8fde\u63a5\u901a\u8fc7\u8f6c\u53d1<\/li>\n<li>\u542f\u7528\u7f51\u7edc\u5730\u5740\u8f6c\u6362<\/li>\n<\/ul>\n<ol>\n<li>\u4fdd\u5b58iptables\u89c4\u5219\uff1a<\/li>\n<\/ol>\n<pre>$ sudo iptables-save &amp;gt; \/etc\/iptables\/rules.v4<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5c06\u4e0a\u8ff0\u547d\u4ee4\u4fdd\u5b58\u5230\/etc\/iptables\/rules.v4\u6587\u4ef6\u4e2d\uff0c\u4ee5\u4fbf\u5728\u542f\u52a8\u65f6\u81ea\u52a8\u52a0\u8f7d\u3002<\/p>\n<p>\u6b65\u9aa44\uff1a\u542f\u7528IP\u8f6c\u53d1\u6c38\u4e45\u6027\u8bbe\u7f6e<br \/>\u4e3a\u4e86\u786e\u4fdd\u914d\u7f6e\u5728\u7cfb\u7edf\u91cd\u542f\u540e\u4ecd\u7136\u751f\u6548\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u4fee\u6539\/sysctl.conf\u6587\u4ef6\u6765\u6c38\u4e45\u5f00\u542fIP\u8f6c\u53d1\u529f\u80fd\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6765\u7f16\u8f91sysctl.conf\u6587\u4ef6\uff1a<\/p>\n<pre>$ sudo nano \/etc\/sysctl.conf<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u627e\u5230\u4ee5\u4e0b\u884c\uff1a<\/p>\n<pre>#net.ipv4.ip_forward=1<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5c06\u5176\u4fee\u6539\u4e3a\uff1a<\/p>\n<pre>net.ipv4.ip_forward=1<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4fdd\u5b58\u5e76\u5173\u95ed\u6587\u4ef6\u3002\u7136\u540e\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f7f\u66f4\u6539\u7acb\u5373\u751f\u6548\uff1a<\/p>\n<pre>$ sudo sysctl -p<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u73b0\u5728\uff0c\u5f53\u7cfb\u7edf\u91cd\u542f\u540e\uff0cIP\u8f6c\u53d1\u529f\u80fd\u5c06\u4f1a\u81ea\u52a8\u5f00\u542f\u3002<\/p>\n<p>\u7ed3\u675f\u8bed\uff1a<br \/>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5b66\u4e60\u4e86\u5982\u4f55\u5728linux\u4e0a\u914d\u7f6enat\u7f51\u5173\u3002\u4f7f\u7528\u4ee5\u4e0a\u6b65\u9aa4\u548c\u793a\u4f8b\u4ee3\u7801\uff0c\u6211\u4eec\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u521b\u5efa\u4e00\u4e2a\u5141\u8bb8\u591a\u4e2a\u4e3b\u673a\u8bbf\u95eeInternet\u7684NAT\u7f51\u5173\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fdb\u884c\u66f4\u9ad8\u7ea7\u7684\u914d\u7f6e\uff0c\u6bd4\u5982\u8bbe\u7f6e\u7aef\u53e3\u8f6c\u53d1\u6216\u9650\u5236\u8bbf\u95ee\u63a7\u5236\u7b49\u3002\u5e0c\u671b\u672c\u6587\u5bf9\u8bfb\u8005\u7406\u89e3\u548c\u914d\u7f6eNAT\u7f51\u5173\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u5728Linux\u4e0a\u914d\u7f6eNAT\u7f51\u5173\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8FDCServers\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u5728\u4e0a\u914d\u7f6enat\u7f51\u5173 \u5bfc\u8bed\uff1a\u5728Linux\u64cd\u4f5c\u7cfb\u7edf\u4e0a\u914d\u7f6eNAT\uff08\u7f51\u7edc\u5730\u5740\u8f6c\u6362\uff09\u7f51\u5173\u662f\u4e00\u9879\u975e\u5e38\u5e38\u89c1\u7684\u4efb\u52a1\u3002NAT\u7f51\u5173\u5141\u8bb8\u591a\u4e2a\u4e3b\u673a\u901a\u8fc7\u5171\u4eab\u5355\u4e2a\u516c\u5171IP\u5730\u5740\u6765\u8bbf\u95eeInternet\u3002 \u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u63a2\u8ba8\u5982\u4f55\u5728linux\u4e0a\u914d\u7f6enat\u7f51\u5173\uff0c\u5e76\u9644\u4e0a\u76f8\u5e94\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u5e2e\u52a9\u8bfb\u8005\u4e00\u6b65\u6b65\u5b8c\u6210\u914d\u7f6e\u8fc7\u7a0b\u3002 NAT\u7f51\u5173\u662f\u4e00\u79cd\u7f51\u7edc\u6280\u672f\uff0c\u5141\u8bb8\u4f4d\u4e8e\u79c1\u6709\u7f51\u7edc\u4e2d\u7684\u591a\u4e2a\u4e3b\u673a\u901a\u8fc7\u5355\u4e2a\u516c\u5171IP\u5730\u5740\u8fdb\u884cInternet\u8bbf\u95ee\u3002\u5b83\u5728\u79c1\u6709\u7f51\u7edc\u548c\u516c\u5171\u7f51\u7edc\u4e4b\u95f4\u67b6\u8bbe\u4e86\u4e00\u5ea7\u6865\u6881\uff0c\u4e3a\u5185\u90e8\u7f51\u7edc\u63d0\u4f9b\u4e86\u4e00\u5b9a\u7684\u5b89\u5168\u6027\u548c\u7f51\u7edc\u5730\u5740\u8f6c\u6362\u529f\u80fd\u3002 \u4ee5\u4e0b\u662f\u5728Linux\u4e0a\u914d\u7f6eNAT\u7f51\u5173\u7684\u6b65\u9aa4\uff1a \u6b65\u9aa41\uff1a\u68c0\u67e5Linux\u5185\u6838\u53c2\u6570\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u786e\u4fddLinux\u5185\u6838\u53c2\u6570\u5df2\u6b63\u786e\u914d\u7f6e\u4ee5\u5141\u8bb8IP\u8f6c\u53d1\u3002IP\u8f6c\u53d1\u662f\u6307\u5141\u8bb8\u6570\u636e\u5728\u4e24\u4e2a\u7f51\u7edc\u63a5\u53e3\u4e4b\u95f4\u8fdb\u884c\u8f6c\u53d1\u7684\u80fd\u529b\u3002\u901a\u8fc7\u4ee5\u4e0b\u547d\u4ee4\u53ef\u4ee5\u68c0\u67e5\u5185\u6838\u53c2\u6570\uff1a $ sysctl net.ipv4.ip_forward \u767b\u5f55\u540e\u590d\u5236 \u5982\u679c\u8f93\u51fa\u7ed3\u679c\u4e3a\u201c1\u201d\uff0c\u5219\u8868\u793a\u5185\u6838\u5df2\u5f00\u542fIP\u8f6c\u53d1\u529f\u80fd\u3002\u5982\u679c\u8f93\u51fa\u7ed3\u679c\u4e3a\u201c0\u201d\uff0c\u5219\u9700\u8981\u8fdb\u884c\u4ee5\u4e0b\u6b65\u9aa4\u6765\u542f\u7528IP\u8f6c\u53d1\u529f\u80fd\uff1a $ sudo sysctl -w net.ipv4.ip_forward=1 \u767b\u5f55\u540e\u590d\u5236 \u6b65\u9aa42\uff1a\u914d\u7f6e\u7f51\u7edc\u63a5\u53e3\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u9700\u8981\u4e3a\u7f51\u7edc\u63a5\u53e3\u914d\u7f6eIP\u5730\u5740\u548c\u5b50\u7f51\u63a9\u7801\u3002\u901a\u5e38\uff0cNAT\u7f51\u5173\u6709\u4e24\u4e2a\u7f51\u7edc\u63a5\u53e3\uff0c\u4e00\u4e2a\u8fde\u63a5\u5230\u516c\u5171\u7f51\u7edc\uff08\u4f8b\u5982Internet\uff09\uff0c\u53e6\u4e00\u4e2a\u8fde\u63a5\u5230\u79c1\u6709\u7f51\u7edc\uff08\u4f8b\u5982\u5c40\u57df\u7f51\uff09\u3002\u5047\u8bbeeth0\u8fde\u63a5\u5230\u516c\u5171\u7f51\u7edc\uff0ceth1\u8fde\u63a5\u5230\u79c1\u6709\u7f51\u7edc\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u914d\u7f6e\u7f51\u7edc\u63a5\u53e3\uff1a $ sudo ifconfig eth0 netmask $ sudo ifconfig eth1 netmask \u767b\u5f55\u540e\u590d\u5236 \u4f8b\u5982\uff1a $ sudo ifconfig eth0 192.168.0.100 netmask 255.255.255.0 $ sudo ifconfig eth1 10.0.0.1 netmask 255.255.255.0 \u767b\u5f55\u540e\u590d\u5236 \u6b65\u9aa43\uff1a\u8bbe\u7f6e\u7f51\u7edc\u5730\u5740\u8f6c\u6362\u89c4\u5219\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u9700\u8981\u8bbe\u7f6e\u7f51\u7edc\u5730\u5740\u8f6c\u6362\u89c4\u5219\u3002\u4f7f\u7528iptables\u5de5\u5177\u53ef\u4ee5\u65b9\u4fbf\u5730\u8bbe\u7f6e\u8f6c\u53d1\u89c4\u5219\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684iptables\u547d\u4ee4\uff1a \u542f\u7528IP\u8f6c\u53d1\uff1a $ sudo iptables -A FORWARD -o eth0 -i 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