{"id":19,"date":"2007-08-26T00:19:50","date_gmt":"2007-08-25T16:19:50","guid":{"rendered":"http:\/\/percy.blog.ubuntu.org.cn\/2007\/08\/26\/iptables%e9%85%8d%e7%bd%ae%e5%b7%a5%e5%85%b7%e6%af%94%e8%be%83\/"},"modified":"2007-08-26T00:19:50","modified_gmt":"2007-08-25T16:19:50","slug":"iptables%e9%85%8d%e7%bd%ae%e5%b7%a5%e5%85%b7%e6%af%94%e8%be%83","status":"publish","type":"post","link":"https:\/\/pjq.me\/?p=19","title":{"rendered":"iptables\u914d\u7f6e\u5de5\u5177\u6bd4\u8f83"},"content":{"rendered":"

iptables\u914d\u7f6e\u5de5\u5177\u6bd4\u8f83<\/p>\n

\u7b80\u4ecb<\/p>\n

\u5728\u8fc7\u53bb\u51e0\u5e74\u4e2d\uff0cLinux\u4f5c\u4e3a\u9632\u706b\u5899\u5e73\u53f0\u7684\u5e94\u7528\u663e\u8457\u589e\u957f\u3002\u4ece\u65e9\u671f1.2\u7248\u5185\u6838\u7684ipfwadm\u5f00\u59cb\uff0cLinux\u7684\u9632\u706b\u5899\u4ee3\u7801\u4e5f\u8d70\u8fc7\u4e86\u5f88\u957f\u4e00\u6bb5\u8def\u7a0b\u4e86\u3002\u5728 2.4\u7248\u7684Linux\u5185\u6838\u4e2d\uff0c\u4f7f\u7528\u4e86netfilter\u4f53\u7cfb\u3002\u5728\u6700\u65b0\u76842.4\u7248\u4e2d\uff0cLinux\u5927\u5927\u52a0\u5f3a\u4e86\u5b89\u5168\u6027\uff0c\u4f8b\u5982\uff1a\u66f4\u597d\u7684\u52a0\u5bc6\u652f\u6301\u548c netfilter\u4f53\u7cfb\u7684\u4f7f\u7528\u3002netfilter\u5177\u6709\u5b8c\u5168\u7684\u5411\u540e\u517c\u5bb9\u6027\u3002<\/p>\n

\u672c\u6587\u5c06\u5bf9iptables\u7684\u914d\u7f6e\u505a\u4e00\u4e2a\u7efc\u8ff0\u5e76\u4e14\u91cd\u70b9\u4ecb\u7ecd\u4e00\u4e9biptables\u7684\u914d\u7f6e\u5de5\u5177\u3002\u672c\u6587\u7684\u8ba8\u8bba\u5c06\u7740\u773c\u4e8eLinux\u5185\u6838\u7684IP\u9632\u706b\u5899\u4ee5\u53ca\u5176\u5404\u79cd\u754c\u9762\u7684\u914d\u7f6e\u5de5\u5177\uff0c\u6bd4\u5982\uff1aGUI\u6216\u8005\u811a\u672c(shell\u3001Perl\u6216\u8005\u7279\u5b9a\u7684\u914d\u7f6e\u8bed\u8a00)\u3002\u4f7f\u7528\u8fd9\u4e9b\u5de5\u5177\u80fd\u591f\u7b80\u5316iptables\u7684\u914d\u7f6e\u51cf\u5c11\u914d\u7f6e\u7684\u9519\u8bef\u3002\u5173\u4e8e iptables\u7684\u77e5\u8bc6\u8bf7\u53c2\u8003Rusty Russell\u5199\u7684Linux iptables HOWTO\u3002<\/p>\n

\u4f7f\u7528\u547d\u4ee4\u884c\u914d\u7f6eiptables\u7684\u56f0\u96be<\/p>\n

\u4f7f\u7528iptables\u7684\u547d\u4ee4\u884c\u63a5\u53e3\u6765\u914d\u7f6eiptables\u9632\u706b\u5899\u5bf9\u4e00\u4e2a\u4eba\u6765\u8bf4\u662f\u4e00\u4e2a\u6311\u6218\uff0c\u7528\u6237\u5f88\u96be\u6307\u5b9a\u6240\u6709IP\u62a5\u6587\u7684\u884c\u4e3a\u3002\u7528\u6237\u9700\u8981\u5bf9 TCP\/IP\u548c\u5e94\u7528\u5c42\u534f\u8bae\u6709\u8f83\u6df1\u7684\u4e86\u89e3\u3002\u8c61\u5176\u524d\u8f88ipchains\u4e00\u6837\uff0ciptables\u628aIP\u8fc7\u6ee4\u89c4\u5219\u5f52\u5e76\u5230\u94fe\u4e2d\uff0cIP\u62a5\u6587\u904d\u5386\u89c4\u5219\u94fe\u63a5\u53d7\u5904\u7406\uff0c\u8fd8\u53ef\u4ee5\u9001\u5230\u53e6\u5916\u7684\u94fe\u63a5\u53d7\u5904\u7406\uff0c\u6216\u8005\u6700\u540e\u7531\u9ed8\u8ba4\u7b56\u7565(ACCEPT\u3001DROP\u3001REJECT)\u5904\u7406\u3002\u6709\u4e9b\u7f51\u7edc\u5e94\u7528\u7a0b\u5e8f\u6bd4\u5176\u5b83\u4e00\u4e9b\u7a0b\u5e8f\u66f4\u5bb9\u6613\u7a7f\u8fc7\u9632\u706b\u5899\uff0c\u56e0\u6b64\u9700\u8981\u7406\u89e3\u7f51\u7edc\u8fde\u63a5\u7684\u5efa\u7acb\u548c\u65ad\u5f00\u3002<\/p>\n

\u6211\u4eec\u770b\u4e00\u4e0bPOP3\u534f\u8bae\uff0c\u8fd9\u662f\u6700\u7b80\u5355\u7684\u534f\u8bae\u4e4b\u4e00\u3002\u5141\u8bb8\u6240\u6709\u5411\u5185\u76ee\u6807\u7aef\u53e3\u662f110\u7684\u62a5\u6587\u901a\u8fc7\u901a\u8fc7\u65e0\u6cd5\u89e3\u51b3\u6240\u6709\u7684\u7ba1\u7406\u95ee\u9898\uff0c\u56e0\u4e3a\u8fd9\u6837\u53ea\u80fd\u4f7f\u5ba2\u6237\u7aef\u5411\u53d1\u51fa\u7533\u8bf7\uff0c\u800c\u670d\u52a1\u5668\u5374\u65e0\u6cd5\u5e94\u7b54\u3002\u53e6\u5916\uff0c\u5982\u679c\u4f7f\u7528\u7f51\u7edc\u5730\u5740\u8f6c\u6362(NAT)\u548c\u5176\u5b83\u65b9\u5f0f\u7684\u62a5\u6587\u8f6c\u53d1\uff0c\u4e5f\u5b58\u5728\u8bb8\u591a\u95ee\u9898\u3002\u56e0\u4e3a\u9632\u706b\u5899\u7684\u914d\u7f6e\u5c06\u5f71\u54cd\u5230\u6574\u4e2a\u4f01\u4e1a\u7684\u5b89\u5168\uff0c\u6240\u4ee5\u5e94\u8be5\u7279\u522b\u5c0f\u5fc3\u3002\u4e0b\u9762\u5c06\u5927\u6982\u5730\u8ba8\u8bbaiptables\u7684\u914d\u7f6e\uff0c\u8981\u83b7\u5f97\u66f4\u591a\u7ec6\u8282\u8bf7\u53c2\u8003Linux iptables HOWTO<\/p>\n

iptables\u7684\u547d\u4ee4\u884c\u9009\u9879<\/p>\n

\u5728\u8fdb\u5165\u8fd9\u65f6\u7684\u8ba8\u8bba\u4e4b\u524d\uff0c\u6211\u4eec\u770b\u4e00\u4e0biptables\u547d\u4ee4\u884c\u9009\u9879\u7684\u4e00\u4e2a\u603b\u7ed3\u3002<\/p>\n

\u89c4\u5219\u94fe\u7ef4\u62a4\u9009\u9879<\/p>\n

1.\u5efa\u7acb\u65b0\u7684\u89c4\u5219\u94fe(-N)
\n2.\u5220\u9664\u4e00\u4e2a\u7a7a\u7684\u89c4\u5219\u94fe(-X)
\n3.\u6539\u53d8\u4e00\u4e2a\u5185\u7f6e\u89c4\u5219\u94fe\u7684\u7b56\u7565(-P)
\n4.\u5217\u51fa\u4e00\u6761\u89c4\u5219\u94fe\u4e2d\u7684\u89c4\u5219(-L)
\n5.\u64e6\u5199\u4e00\u6761\u89c4\u5219\u94fe\u4e2d\u7684\u89c4\u5219(-F)<\/p>\n

\u89c4\u5219\u7ef4\u62a4<\/p>\n

1.\u5728\u4e00\u6761\u89c4\u5219\u94fe\u4e2d\u52a0\u5165\u4e00\u6761\u65b0\u7684\u89c4\u5219(-A)
\n2.\u5220\u9664\u4e00\u6761\u89c4\u5219\u94fe\u4e2d\u67d0\u4e2a\u4f4d\u7f6e\u7684\u89c4\u5219(-D)<\/p>\n

iptables\u7684\u4f18\u70b9<\/p>\n

\u5728\u8ba8\u8bba\u5404\u79cdiptables\u914d\u7f6e\u5de5\u5177\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u770b\u4e00\u4e0biptables\u7684\u4f18\u70b9\uff0c\u5c24\u5176\u662fnetfilter\u6bd4ipchains\u5177\u6709\u7684\u4f18\u52bf\u3002<\/p>\n

iptables\u5141\u8bb8\u5efa\u7acb\u72b6\u6001(stateful)\u9632\u706b\u5899\uff0c\u5c31\u662f\u5728\u5185\u5b58\u4e2d\u4fdd\u5b58\u7a7f\u8fc7\u9632\u706b\u5899\u7684\u6bcf\u6761\u8fde\u63a5\u3002\u8fd9\u79cd\u6a21\u5f0f\u5bf9\u4e8e\u6709\u6548\u5730\u914d\u7f6eFTP\u548cDNS\u4ee5\u53ca\u5176\u5b83\u7f51\u7edc\u670d\u52a1\u662f\u5fc5\u8981\u7684\u3002<\/p>\n

iptables\u80fd\u591f\u8fc7\u6ee4TCP\u6807\u5fd7\u4efb\u610f\u7ec4\u5408\u62a5\u6587\uff0c\u8fd8\u80fd\u591f\u8fc7\u6ee4MAC\u5730\u5740\u3002<\/p>\n

\u7cfb\u7edf\u65e5\u5fd7\u6bd4ipchains\u66f4\u5bb9\u6613\u914d\u7f6e\uff0c\u6269\u5c55\u6027\u4e5f\u66f4\u597d\u3002<\/p>\n

\u5bf9\u4e8e\u7f51\u7edc\u5730\u5740\u8f6c\u6362(Network Address Translation)\u548c\u900f\u660e\u4ee3\u7406\u7684\u652f\u6301\uff0cnetfilter\u66f4\u4e3a\u5f3a\u5927\u548c\u6613\u4e8e\u4f7f\u7528\u3002<\/p>\n

iptable\u80fd\u591f\u963b\u6b62\u67d0\u4e9bDOS\u653b\u51fb\uff0c\u4f8b\u5982SYS\u6d2a\u6cdb\u653b\u51fb\u3002<\/p>\n

iptables\u914d\u7f6e\u5de5\u5177<\/p>\n

\u73b0\u5728\uff0c\u6211\u4eec\u770b\u4e00\u4e0bLinux iptables\u7684\u4e00\u4e9b\u914d\u7f6e\u5de5\u5177\u3002\u6211\u4e3b\u8981\u5173\u6ce8\u6bcf\u4e2a\u5de5\u5177\u7684\u7279\u5f81\u3001\u5f39\u6027\u548c\u6613\u7528\u6027\u3002\u6211\u4eec\u5c06\u8ba8\u8bba\u4ee5\u4e0b\u7684\u5de5\u5177\uff1a<\/p>\n

MonMotha’s Firewall 2.3.5 \u4f5c\u8005\uff1aMonMotha
\nFirewallscript (iptables 4.4c-3 devel) \u4f5c\u8005\uff1aPatrik Hildingsson
\nFerm-0.0.18 \u4f5c\u8005\uff1aAuke Kok
\nAGT-0.83 \u4f5c\u8005\uff1aAndy Gilligan
\nKnetfilter-1.2.4 \u4f5c\u8005\uff1aLuigi Genoni
\ngShield-2.0.2 \u4f5c\u8005\uff1aR. Gregory<\/p>\n

MonMotha\u7684Firewall 2.3.5
\nMonMotha\u5199\u7684Firewall 2.3.5\u662f\u4e00\u4e2a\u5927\u7ea630K\u7684shell\u811a\u672c\u3002\u76ee\u524d\uff0c\u4e3b\u8981\u9002\u7528\u4e8e\u57fa\u4e8e\u4e3b\u673a\u7684\u4fdd\u62a4\uff0c\u56e0\u4e3a\u4e00\u4e9b\u57fa\u4e8e\u7f51\u7edc\u7684\u9009\u9879\u6b63\u5728\u5f00\u53d1\u4e2d\u3002\u8fd9\u4e2a\u811a\u672c\u7684\u754c\u9762(\u4f8b\u5982\uff1a\u7ed9 iptables\u4f20\u9012\u914d\u7f6e\u9009\u9879\u7684\u65b9\u6cd5)\u6709\u70b9\u6df7\u4e71\u3002\u4e0d\u8fc7\uff0c\u5b83\u4e0d\u9700\u8981\u914d\u7f6e\u6587\u4ef6\u800c\u4e14\u5b89\u88c5\u5bb9\u6613\uff0c\u76f4\u63a5\u590d\u5236\u5230\u4efb\u4f55\u5730\u65b9\u90fd\u53ef\u4ee5\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5b83\u6839\u672c\u4e0d\u505a\u4ec0\u4e48\uff0c\u5b9e\u9645\u4e0a\u6839\u672c\u5c31\u4e0d\u6267\u884c\uff0c\u4e5f\u7f3a\u5c11\u6587\u6863\u3002\u8fd9\u4e2a\u811a\u672c\u5bf9\u4e8e\u62e8\u53f7\u7528\u6237\u53ef\u80fd\u6709\u70b9\u7528\u5904\u3002<\/p>\n

Firewallscript
\nFirewallscript(IFS 4.4d)\u4e5f\u662f\u4e00\u4e2abash\u811a\u672c\uff0c\u5927\u7ea6\u670985K\u3002\u8fd9\u4e2a\u811a\u672c\u53ef\u4ee5\u7528\u4e8e\u57fa\u4e8e\u4e3b\u673a\u548c\u7f51\u7edc\u7684\u9632\u62a4\u3002\u9996\u6b21\u8fd0\u884c\u65f6\uff0c\u5b83\u4f1a\u76f4\u63a5\u4ea7\u751f\u4e00\u4e2a\u914d\u7f6e\u6587\u4ef6\u3002\u4e0d\u8fc7\uff0c\u5728\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e2a\u6587\u4ef6\u4e0d\u8d77\u4ec0\u4e48\u4f5c\u7528\uff0c\u53ea\u6709\u6d4b\u8bd5\u4f5c\u7528\u3002\u8fd9\u4e2a\u811a\u672c\u53ef\u4ee5\u914d\u7f6eNAT\u548c\u5730\u5740\u4f2a\u88c5\u3002\u8fd9\u4e2a\u811a\u672c\u975e\u5e38\u590d\u6742\uff0c\u4f46\u662f\u7f3a\u5c11\u6587\u6863\uff0c\u56e0\u6b64\u6700\u597d\u80fd\u591f\u4ed4\u7ec6\u9605\u8bfb\u5b83\u7684\u4ee3\u7801\uff0c\u4f7f\u7528 iptables -L\u547d\u4ee4\u54ea\u4e2a\u94fe\u5df2\u7ecf\u751f\u6548\uff0c\u4ec0\u4e48\u88ab\u5141\u8bb8\/\u62d2\u7edd\u3002\u8fd9\u4e2a\u811a\u672c\u7684IP\u62a5\u6587\u8ffd\u8e2a\u529f\u80fd\u8fd8\u53ef\u4ee5\u4e3a\u4f60\u63d0\u4f9b\u5a31\u4e50\u3002\u6b64\u5916\uff0c\u5b83\u8fd8\u4f1a\u81ea\u52a8\u63a2\u6d4b\u3001\u52a0\u8f7diptables\u9700\u8981\u7684\u5185\u6838\u6a21\u5757\u3002\u8fd9\u4e2a\u811a\u672c\u548c\u4e0a\u4e00\u4e2a\u811a\u672c\u8fd8\u5177\u6709\u53d6\u6d88(undo)\u529f\u80fd\uff0c\u80fd\u591f\u6062\u590diptables\u539f\u6765\u7684\u914d\u7f6e\u6587\u4ef6\u3002<\/p>\n

Ferm
\nFerm\u662f\u4e00\u4e2aPerl\u811a\u672c\uff0c\u4f7f\u7528\u4e00\u79cd\u7c7bC\u8bed\u8a00\u5199\u6210\u7684\u914d\u7f6e\u6587\u4ef6\u3002\u8fd9\u79cd\u8bed\u8a00\u975e\u5e38\u5bb9\u6613\u9605\u8bfb\u548c\u7406\u89e3\u3002\u8fd9\u4e2a\u811a\u672c\u6709\u5f88\u597d\u7684\u6587\u6863\u548c\u4e30\u5bcc\u7684\u793a\u4f8b\u4f5c\u4e3a\u53c2\u8003\u3002<\/p>\n

\u8fd9\u662f\u4e00\u4e2a\u4f8b\u5b50\uff1a<\/p>\n

—————————————————————————–
\n# simple workstation example for ferm
\nchain input {
\nif ppp0 # put your outside interface here
\n{
\nproto tcp goto fw_tcp;
\nproto udp goto fw_udp;
\nproto icmp goto fw_icmp;
\n}
\n}
\nchain fw_tcp proto tcp {
\ndport ssh ACCEPT;
\nsyn DENY log;
\ndport domain ACCEPT;
\ndport 0:1023 DENY log;
\n}
\nchain fw_udp proto udp {
\nDENY log;
\n}
\nchain fw_icmp proto icmp {
\nicmptype (
\ndestination-unreachable time-exceeded
\n) ACCEPT;
\nDENY log;
\n}<\/p>\n

—————————————————————————–<\/p>\n

\u8fd9\u4e2a\u914d\u7f6e\u6587\u4ef6\u5c06\u4f7fferm\u4ea7\u751fiptables\u5982\u4e0b\u89c4\u5219\uff1a\u5141\u8bb8\u5411\u5916\u7684ssh\u548cDNS\u62a5\u6587\u901a\u8fc7\uff1b\u963b\u585e\u6240\u6709\u7684UDP\u62a5\u6587\uff1b\u53ea\u5141\u8bb8\u4e24\u79cd\u7c7b\u578b\u7684ICMP\u6d88\u606f\u901a\u8fc7\uff1a\u76ee\u7684\u4e0d\u53ef\u8fbe\u548c\u8d85\u65f6\uff0c\u5e76\u7edd\u62d2\u7edd\u548c\u65e5\u5fd7\u5176\u5b83\u7c7b\u578b\u7684ICMP\u6d88\u606f\u3002<\/p>\n

AGT<\/p>\n

AGT\u662f\u4e00\u4e2a\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684\u7a0b\u5e8f\u3002\u4ece\u5b83\u7684\u4ee3\u7801\u6765\u770b\uff0c\u76ee\u524d\u8fd8\u5904\u4e8e\u5f00\u53d1\u9636\u6bb5\u3002\u4e0d\u652f\u6301automake\uff0c\u9700\u8981\u624b\u5de5\u7f16\u8f91Makefile\u6587\u4ef6\uff0c\u6587\u6863\u4e5f\u4e0d\u662f\u5f88\u4e30\u5bcc\uff0c\u4f46\u662f\u5176\u914d\u7f6e\u6587\u4ef6\u975e\u5e38\u7b80\u5355\u3002\u4e0b\u9762\u5c31\u662f\u4e00\u4e2a\u914d\u7f6e\u6587\u4ef6\uff1a<\/p>\n

NEW | FROM-INT
\nNEW | RESET<\/p>\n

|| FROM-INT | icmp | ACCEPT |||||
\n|| FROM-INT | tcp | ACCEPT ||||| pop3
\n|| FROM-INT | tcp | ACCEPT ||||| imap<\/p>\n

|| RESET | tcp | REJECT –reject-with tcp-reset |||||<\/p>\n

\u8fd9\u6837\u7684\u6587\u4ef6\u683c\u5f0f\uff0c\u52a0\u4e0a\u7f3a\u4e4f\u5fc5\u8981\u7684\u6587\u6863\uff0c\u5bf9\u4f7f\u7528\u8005\u6765\u8bf4\u662f\u4e00\u4e2a\u5f88\u5927\u7684\u6311\u6218\u3002\u800c\u4e14\u6700\u597d\u591a\u82b1\u4e9b\u65f6\u95f4\u5b66\u5b66iptables\u3002<\/p>\n

knetfilter
\nknetfilter\u662f\u4e00\u4e2a\u975e\u5e38\u68d2\u7684\u56fe\u5f62\u5316iptables\u914d\u7f6e\u5de5\u5177\uff0c\u5b83\u662f\u57fa\u4e8eKDE\u7684(\u6709KDE1\u548cKDE2\u4e24\u4e2a\u7248\u672c)\u3002knetfilter \u975e\u5e38\u6613\u4e8e\u4e0a\u624b\uff0c\u4f60\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u4f7f\u7528\u5b83\u6765\u914d\u7f6e\u57fa\u4e8e\u4e3b\u673a\u4fdd\u62a4\u7684\u89c4\u5219\u548c\u89c4\u5219\u5217\u8868\uff1b\u4fdd\u5b58\u548c\u6062\u590d\u6d4b\u8fd9\u4e9b\u89c4\u5219\u548c\u89c4\u5219\u5217\u8868\uff1b\u6d4b\u8bd5\u89c4\u5219\u548c\u89c4\u5219\u5217\u8868(\u5728\u540c\u4e00\u4e2a\u9762\u677f\u4e0a\u8fd0\u884c tcpdump\u7f51\u7edc\u55c5\u63a2\u5668)\uff0c\u8fd9\u4e00\u5207\u53ea\u8981\u70b9\u51e0\u4e0b\u9f20\u6807\u5c31\u53ef\u4ee5\u4e86\u3002\u5b83\u4e5f\u652f\u6301NAT\u548c\u7f51\u7edc\u5730\u5740\u4f2a\u88c5\u7684\u914d\u7f6e\u3002\u4f46\u662f\uff0c\u5bf9\u4e8e\u62e8\u53f7\u5de5\u4f5c\u7ad9\uff0cknetfilter\u5de5\u4f5c\u7684\u4e0d\u592a\u597d\uff0c\u56e0\u4e3a\u5b83\u9700\u8981\u672c\u5730IP\uff0c\u800c\u4e14\u53ea\u63a2\u6d4beth0\u7f51\u7edc\u63a5\u53e3\uff0c\u4e0d\u8fdb\u884cPPP\u63a2\u6d4b\u3002\u8fd9\u4e2a\u5de5\u7a0b\u7684\u6587\u6863\u4e5f\u5f88\u5c11\uff0c\u4e0d\u8fc7\u56e0\u4e3a\u662f\u57fa\u4e8e\u56fe\u5f62\u754c\u9762\uff0c\u6240\u4ee5\u5373\u4f7f\u4e0d\u7528\u624b\u518c\u4e5f\u53ef\u4ee5\u5f88\u597d\u5730\u4f7f\u7528\u3002<\/p>\n

gShield
\ngShield\u662f\u4e00\u4e2abash shell\u811a\u672c\uff0c\u53ef\u80fd\u662f\u5f53\u524d\u6700\u6210\u719f\u7684\u4e00\u4e2a\u5de5\u5177\u3002\u5b83\u7684\u6587\u6863\u975e\u5e38\u4e30\u5bcc\uff0c\u914d\u7f6e\u6587\u4ef6\u4e5f\u6bd4\u8f83\u5408\u7406\u76f4\u89c2\uff0c\u8fd8\u80fd\u591f\u8bbe\u7f6eNAT\u3002\u5b83\u4e0d\u4f46\u80fd\u591f\u5904\u9759\u6001IP\u5730\u5740\uff0c\u8fd8\u80fd\u591f\u5904\u7406\u52a8\u6001IP\u5730\u5740(\u4f8b\u5982\uff1aPPP)\u3002<\/p>\n

gShield\u8fd8\u6709\u56fe\u5f62\u754c\u9762\uff0c\u76ee\u524d\u4ecd\u7136\u5904\u4e8e\u65e9\u671f\u5f00\u53d1\u9636\u6bb5\uff0c\u53ef\u4ee5\u4ecehttp:\/\/members.home.com\/vhodges\/gshieldconf.html\u4e0b\u8f7d\u3002\u4e0d\u8fc7\uff0c\u5b83\u4f3c\u4e4e\u53ea\u517c\u5bb9gShield\u7684\u65e9\u671f\u7248\u672c(1.x)\u3002<\/p>\n

\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u914d\u7f6e\u6587\u4ef6\uff1a<\/p>\n

FW_ROOT=”\/etc\/firewall”
\nIPTABLES=`which iptables`
\nLOCALIF=”eth0″
\nDNS=”24.31.195.65″
\nLTIME=”20\/m”
\nALLOW_DHCP_LEASES=”YES”
\n…<\/p>\n

gShield\u4f7f\u7528\u7684\u9ed8\u8ba4\u914d\u7f6e\u975e\u5e38\u5b89\u5168\uff0c\u7279\u522b\u9002\u5408\u4e0d\u613f\u610f\u6446\u5f04\u914d\u7f6e\u6587\u4ef6\u7684\u7528\u6237\uff0c\u4e0d\u8fc7\u8f6f\u4ef6\u7684\u7f16\u8005\u5efa\u8bae\u7528\u6237\u6700\u597d\u80fd\u591f\u901a\u8bfb\u6574\u4e2a\u914d\u7f6e\u6587\u4ef6\u3002\u636eREADME\u6587\u4ef6\u8bb2\uff0cgShield\u5b9e\u73b0\u4e86”\u7c7btcpwrapper\u98ce\u683c\u7684\u670d\u52a1\u8bbf\u95ee\u63a7\u5236\u529f\u80fd”\uff0c\u4f7f\u7528\u8fd9\u4e2a\u529f\u80fd\u7528\u6237\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u963b\u585e\/\u5141\u8bb8\u67d0\u9879\u670d\u52a1\uff0c\u800c\u4e0d\u5fc5\u8003\u8651\u62a5\u6587\u65b9\u5411\u4e4b\u7c7b\u7684\u95ee\u9898\uff0c\u53ea\u8981\u5173\u5fc3\u4ec0\u4e48\u5ba2\u6237\u8fde\u63a5\u5230\u670d\u52a1\u5668\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n

\u7ed3\u8bba<\/p>\n

\u867d\u7136\u672c\u6587\u4ecb\u7ecd\u4e86\u4e00\u4e9b\u9632\u706b\u5899\u914d\u7f6e\u5de5\u5177\uff0c\u4f46\u662f\u5b9e\u9645\u4e0a\u76ee\u524d\u8fd8\u6ca1\u6709\u7406\u60f3\u7684\u914d\u7f6e\u5de5\u5177\u3002\u6700\u597d\u7684\u914d\u7f6e\u5de5\u5177\u8fd8\u662fiptables\u547d\u4ee4\uff0c\u8fd9\u91cc\u4ecb\u7ecd\u7684\u8fd9\u4e9b\u5de5\u5177\uff0c\u53ea\u9002\u7528\u4e8e\u5bf9\u4e8e\u4f7f\u7528iptables\u547d\u4ee4\u884c\u611f\u89c9\u56f0\u96be\u7684\u7528\u6237\u3002<\/p>\n

\u8f6c\u8f7d\uff1a\u4f5c\u8005\uff1aAnton Chuvakin<\/p>\n","protected":false},"excerpt":{"rendered":"

iptables\u914d\u7f6e\u5de5\u5177\u6bd4\u8f83 \u7b80\u4ecb \u5728\u8fc7\u53bb\u51e0\u5e74\u4e2d\uff0cLinux\u4f5c\u4e3a\u9632\u706b\u5899\u5e73\u53f0\u7684\u5e94\u7528\u663e\u8457\u589e\u957f\u3002\u4ece\u65e9\u671f1.2\u7248\u5185\u6838\u7684ipfwadm\u5f00\u59cb\uff0cLinux\u7684\u9632\u706b\u5899\u4ee3\u7801\u4e5f\u8d70\u8fc7\u4e86\u5f88\u957f\u4e00\u6bb5\u8def\u7a0b\u4e86\u3002\u5728 2.4\u7248\u7684Linux\u5185\u6838\u4e2d\uff0c\u4f7f\u7528\u4e86netfilter\u4f53\u7cfb\u3002\u5728\u6700\u65b0\u76842.4\u7248\u4e2d\uff0cLinux\u5927\u5927\u52a0\u5f3a\u4e86\u5b89\u5168\u6027\uff0c\u4f8b\u5982\uff1a\u66f4\u597d\u7684\u52a0\u5bc6\u652f\u6301\u548c netfilter\u4f53\u7cfb\u7684\u4f7f\u7528\u3002netfilter\u5177\u6709\u5b8c\u5168\u7684\u5411\u540e\u517c\u5bb9\u6027\u3002 \u672c\u6587\u5c06\u5bf9iptables\u7684\u914d\u7f6e\u505a\u4e00\u4e2a\u7efc\u8ff0\u5e76\u4e14\u91cd\u70b9\u4ecb\u7ecd\u4e00\u4e9biptables\u7684\u914d\u7f6e\u5de5\u5177\u3002\u672c\u6587\u7684\u8ba8\u8bba\u5c06\u7740\u773c\u4e8eLinux\u5185\u6838\u7684IP\u9632\u706b\u5899\u4ee5\u53ca\u5176\u5404\u79cd\u754c\u9762\u7684\u914d\u7f6e\u5de5\u5177\uff0c\u6bd4\u5982\uff1aGUI\u6216\u8005\u811a\u672c(shell\u3001Perl\u6216\u8005\u7279\u5b9a\u7684\u914d\u7f6e\u8bed\u8a00)\u3002\u4f7f\u7528\u8fd9\u4e9b\u5de5\u5177\u80fd\u591f\u7b80\u5316iptables\u7684\u914d\u7f6e\u51cf\u5c11\u914d\u7f6e\u7684\u9519\u8bef\u3002\u5173\u4e8e iptables\u7684\u77e5\u8bc6\u8bf7\u53c2\u8003Rusty Russell\u5199\u7684Linux iptables HOWTO\u3002 \u4f7f\u7528\u547d\u4ee4\u884c\u914d\u7f6eiptables\u7684\u56f0\u96be \u4f7f\u7528iptables\u7684\u547d\u4ee4\u884c\u63a5\u53e3\u6765\u914d\u7f6eiptables\u9632\u706b\u5899\u5bf9\u4e00\u4e2a\u4eba\u6765\u8bf4\u662f\u4e00\u4e2a\u6311\u6218\uff0c\u7528\u6237\u5f88\u96be\u6307\u5b9a\u6240\u6709IP\u62a5\u6587\u7684\u884c\u4e3a\u3002\u7528\u6237\u9700\u8981\u5bf9 TCP\/IP\u548c\u5e94\u7528\u5c42\u534f\u8bae\u6709\u8f83\u6df1\u7684\u4e86\u89e3\u3002\u8c61\u5176\u524d\u8f88ipchains\u4e00\u6837\uff0ciptables\u628aIP\u8fc7\u6ee4\u89c4\u5219\u5f52\u5e76\u5230\u94fe\u4e2d\uff0cIP\u62a5\u6587\u904d\u5386\u89c4\u5219\u94fe\u63a5\u53d7\u5904\u7406\uff0c\u8fd8\u53ef\u4ee5\u9001\u5230\u53e6\u5916\u7684\u94fe\u63a5\u53d7\u5904\u7406\uff0c\u6216\u8005\u6700\u540e\u7531\u9ed8\u8ba4\u7b56\u7565(ACCEPT\u3001DROP\u3001REJECT)\u5904\u7406\u3002\u6709\u4e9b\u7f51\u7edc\u5e94\u7528\u7a0b\u5e8f\u6bd4\u5176\u5b83\u4e00\u4e9b\u7a0b\u5e8f\u66f4\u5bb9\u6613\u7a7f\u8fc7\u9632\u706b\u5899\uff0c\u56e0\u6b64\u9700\u8981\u7406\u89e3\u7f51\u7edc\u8fde\u63a5\u7684\u5efa\u7acb\u548c\u65ad\u5f00\u3002 \u6211\u4eec\u770b\u4e00\u4e0bPOP3\u534f\u8bae\uff0c\u8fd9\u662f\u6700\u7b80\u5355\u7684\u534f\u8bae\u4e4b\u4e00\u3002\u5141\u8bb8\u6240\u6709\u5411\u5185\u76ee\u6807\u7aef\u53e3\u662f110\u7684\u62a5\u6587\u901a\u8fc7\u901a\u8fc7\u65e0\u6cd5\u89e3\u51b3\u6240\u6709\u7684\u7ba1\u7406\u95ee\u9898\uff0c\u56e0\u4e3a\u8fd9\u6837\u53ea\u80fd\u4f7f\u5ba2\u6237\u7aef\u5411\u53d1\u51fa\u7533\u8bf7\uff0c\u800c\u670d\u52a1\u5668\u5374\u65e0\u6cd5\u5e94\u7b54\u3002\u53e6\u5916\uff0c\u5982\u679c\u4f7f\u7528\u7f51\u7edc\u5730\u5740\u8f6c\u6362(NAT)\u548c\u5176\u5b83\u65b9\u5f0f\u7684\u62a5\u6587\u8f6c\u53d1\uff0c\u4e5f\u5b58\u5728\u8bb8\u591a\u95ee\u9898\u3002\u56e0\u4e3a\u9632\u706b\u5899\u7684\u914d\u7f6e\u5c06\u5f71\u54cd\u5230\u6574\u4e2a\u4f01\u4e1a\u7684\u5b89\u5168\uff0c\u6240\u4ee5\u5e94\u8be5\u7279\u522b\u5c0f\u5fc3\u3002\u4e0b\u9762\u5c06\u5927\u6982\u5730\u8ba8\u8bbaiptables\u7684\u914d\u7f6e\uff0c\u8981\u83b7\u5f97\u66f4\u591a\u7ec6\u8282\u8bf7\u53c2\u8003Linux iptables HOWTO iptables\u7684\u547d\u4ee4\u884c\u9009\u9879 \u5728\u8fdb\u5165\u8fd9\u65f6\u7684\u8ba8\u8bba\u4e4b\u524d\uff0c\u6211\u4eec\u770b\u4e00\u4e0biptables\u547d\u4ee4\u884c\u9009\u9879\u7684\u4e00\u4e2a\u603b\u7ed3\u3002 \u89c4\u5219\u94fe\u7ef4\u62a4\u9009\u9879 1.\u5efa\u7acb\u65b0\u7684\u89c4\u5219\u94fe(-N) 2.\u5220\u9664\u4e00\u4e2a\u7a7a\u7684\u89c4\u5219\u94fe(-X) 3.\u6539\u53d8\u4e00\u4e2a\u5185\u7f6e\u89c4\u5219\u94fe\u7684\u7b56\u7565(-P) 4.\u5217\u51fa\u4e00\u6761\u89c4\u5219\u94fe\u4e2d\u7684\u89c4\u5219(-L) 5.\u64e6\u5199\u4e00\u6761\u89c4\u5219\u94fe\u4e2d\u7684\u89c4\u5219(-F) \u89c4\u5219\u7ef4\u62a4 1.\u5728\u4e00\u6761\u89c4\u5219\u94fe\u4e2d\u52a0\u5165\u4e00\u6761\u65b0\u7684\u89c4\u5219(-A) 2.\u5220\u9664\u4e00\u6761\u89c4\u5219\u94fe\u4e2d\u67d0\u4e2a\u4f4d\u7f6e\u7684\u89c4\u5219(-D) iptables\u7684\u4f18\u70b9 \u5728\u8ba8\u8bba\u5404\u79cdiptables\u914d\u7f6e\u5de5\u5177\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u770b\u4e00\u4e0biptables\u7684\u4f18\u70b9\uff0c\u5c24\u5176\u662fnetfilter\u6bd4ipchains\u5177\u6709\u7684\u4f18\u52bf\u3002 iptables\u5141\u8bb8\u5efa\u7acb\u72b6\u6001(stateful)\u9632\u706b\u5899\uff0c\u5c31\u662f\u5728\u5185\u5b58\u4e2d\u4fdd\u5b58\u7a7f\u8fc7\u9632\u706b\u5899\u7684\u6bcf\u6761\u8fde\u63a5\u3002\u8fd9\u79cd\u6a21\u5f0f\u5bf9\u4e8e\u6709\u6548\u5730\u914d\u7f6eFTP\u548cDNS\u4ee5\u53ca\u5176\u5b83\u7f51\u7edc\u670d\u52a1\u662f\u5fc5\u8981\u7684\u3002 iptables\u80fd\u591f\u8fc7\u6ee4TCP\u6807\u5fd7\u4efb\u610f\u7ec4\u5408\u62a5\u6587\uff0c\u8fd8\u80fd\u591f\u8fc7\u6ee4MAC\u5730\u5740\u3002 \u7cfb\u7edf\u65e5\u5fd7\u6bd4ipchains\u66f4\u5bb9\u6613\u914d\u7f6e\uff0c\u6269\u5c55\u6027\u4e5f\u66f4\u597d\u3002 \u5bf9\u4e8e\u7f51\u7edc\u5730\u5740\u8f6c\u6362(Network Address 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Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pjq.me\/?p=19\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"iptables\u914d\u7f6e\u5de5\u5177\u6bd4\u8f83 - Jianqing's Blog\" \/>\n<meta property=\"og:description\" content=\"iptables\u914d\u7f6e\u5de5\u5177\u6bd4\u8f83 \u7b80\u4ecb \u5728\u8fc7\u53bb\u51e0\u5e74\u4e2d\uff0cLinux\u4f5c\u4e3a\u9632\u706b\u5899\u5e73\u53f0\u7684\u5e94\u7528\u663e\u8457\u589e\u957f\u3002\u4ece\u65e9\u671f1.2\u7248\u5185\u6838\u7684ipfwadm\u5f00\u59cb\uff0cLinux\u7684\u9632\u706b\u5899\u4ee3\u7801\u4e5f\u8d70\u8fc7\u4e86\u5f88\u957f\u4e00\u6bb5\u8def\u7a0b\u4e86\u3002\u5728 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