{"id":245,"date":"2021-02-14T20:06:17","date_gmt":"2021-02-14T12:06:17","guid":{"rendered":"https:\/\/www.zhiwanyuzhou.com\/?p=245"},"modified":"2021-02-14T20:07:55","modified_gmt":"2021-02-14T12:07:55","slug":"iptables%e7%ae%80%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/www.zhiwanyuzhou.com\/index.php\/2021\/02\/14\/iptables%e7%ae%80%e4%bb%8b\/","title":{"rendered":"iptables\u7b80\u4ecb"},"content":{"rendered":"\n<p>\u8def\u7531\u5668\u4e2d\u666e\u904d\u4f7f\u7528Iptables\u4f5c\u4e3a\u7f51\u7edc\u9632\u706b\u5899\u7ba1\u7406\u65b9\u6848\uff0cIptabels\u662f\u4e0e Linux\u5185\u6838\u96c6\u6210\u7684\u5305\u8fc7\u6ee4\u9632\u706b\u5899\u7cfb\u7edf\uff0c\u51e0\u4e4e\u6240\u6709\u7684linux\u53d1\u884c\u7248\u672c\u90fd\u4f1a\u5305\u542bIptables\u7684\u529f\u80fd\u3002\u5982\u679c Linux \u7cfb\u7edf\u8fde\u63a5\u5230\u56e0\u7279\u7f51\u6216 LAN\u3001\u670d\u52a1\u5668\u6216\u8fde\u63a5 LAN \u548c\u56e0\u7279\u7f51\u7684\u4ee3\u7406\u670d\u52a1\u5668\uff0c \u5219Iptables\u6709\u5229\u4e8e\u5728 Linux \u7cfb\u7edf\u4e0a\u66f4\u597d\u5730\u63a7\u5236 IP \u4fe1\u606f\u5305\u8fc7\u6ee4\u548c\u9632\u706b\u5899\u914d\u7f6e\u3002<\/p>\n\n\n\n<p>netfilter\/iptables \u8fc7\u6ee4\u9632\u706b\u5899\u7cfb\u7edf\u662f\u4e00\u79cd\u529f\u80fd\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u53ef\u7528\u4e8e\u6dfb\u52a0\u3001\u7f16\u8f91\u548c\u9664\u53bb\u89c4\u5219\uff0c\u8fd9\u4e9b\u89c4\u5219\u662f\u5728\u505a\u4fe1\u606f\u5305\u8fc7\u6ee4\u51b3\u5b9a\u65f6\uff0c\u9632\u706b\u5899\u6240\u9075\u5faa\u548c\u7ec4\u6210\u7684\u89c4\u5219\u3002\u8fd9\u4e9b\u89c4\u5219\u5b58\u50a8\u5728\u4e13\u7528\u7684\u4fe1 \u606f\u5305\u8fc7\u6ee4\u8868\u4e2d\uff0c\u800c\u8fd9\u4e9b\u8868\u96c6\u6210\u5728 Linux \u5185\u6838\u4e2d\u3002\u5728\u4fe1\u606f\u5305\u8fc7\u6ee4\u8868\u4e2d\uff0c\u89c4\u5219\u88ab\u5206\u7ec4\u653e\u5728\u6211\u4eec\u6240\u8c13\u7684\u94fe\uff08chain\uff09\u4e2d\u3002<\/p>\n\n\n\n<p>\u867d\u7136netfilter\/iptables\u5305\u8fc7\u6ee4\u7cfb\u7edf\u88ab\u79f0\u4e3a\u5355\u4e2a\u5b9e\u4f53\uff0c\u4f46\u5b83\u5b9e\u9645\u4e0a\u7531\u4e24\u4e2a\u7ec4\u4ef6netfilter \u548c iptables \u7ec4\u6210\u3002<\/p>\n\n\n\n<p>netfilter \u7ec4\u4ef6\u4e5f\u79f0\u4e3a\u5185\u6838\u7a7a\u95f4\uff08kernelspace\uff09\uff0c\u662f\u5185\u6838\u7684\u4e00\u90e8\u5206\uff0c\u7531\u4e00\u4e9b\u4fe1\u606f\u5305\u8fc7\u6ee4\u8868\u7ec4\u6210\uff0c\u8fd9\u4e9b\u8868\u5305\u542b\u5185\u6838\u7528\u6765\u63a7\u5236\u4fe1\u606f\u5305\u8fc7\u6ee4\u5904\u7406\u7684\u89c4\u5219\u96c6\u3002<\/p>\n\n\n\n<p>iptables \u7ec4\u4ef6\u662f\u4e00\u79cd\u5de5\u5177\uff0c\u4e5f\u79f0\u4e3a\u7528\u6237\u7a7a\u95f4\uff08userspace\uff09\uff0c\u5b83\u4f7f\u63d2\u5165\u3001\u4fee\u6539\u548c\u9664\u53bb\u4fe1\u606f\u5305\u8fc7\u6ee4\u8868\u4e2d\u7684\u89c4\u5219\u53d8\u5f97\u5bb9\u6613\u3002<\/p>\n\n\n\n<p>\u539f\u7406\uff1a<\/p>\n\n\n\n<p>\uff081\uff09 \u4e00\u4e2a\u6570\u636e\u5305\u8fdb\u5165\u7f51\u5361\u65f6\uff0c\u5b83\u9996\u5148\u8fdb\u5165PREROUTING\u94fe\uff0c\u5185\u6838\u6839\u636e\u6570\u636e\u5305\u76ee\u7684IP\u5224\u65ad\u662f\u5426\u9700\u8981\u8f6c\u53d1\u51fa\u53bb\u3002<\/p>\n\n\n\n<p>\uff082\uff09 \u5982\u679c\u6570\u636e\u5305\u5c31\u662f\u8fdb\u5165\u672c\u673a\u7684\uff0c\u5b83\u5c31\u4f1a\u6cbf\u7740\u56fe\u5411\u4e0b\u79fb\u52a8\uff0c\u5230\u8fbeINPUT\u94fe\u3002\u6570\u636e\u5305\u5230\u4e86INPUT\u94fe\u540e\uff0c\u4efb\u4f55\u8fdb\u7a0b\u90fd\u4f1a\u6536\u5230\u5b83\u3002\u672c\u673a\u4e0a\u8fd0\u884c\u7684\u7a0b\u5e8f\u53ef\u4ee5\u53d1\u9001\u6570\u636e\u5305\uff0c\u8fd9\u4e9b\u6570\u636e\u5305\u4f1a\u7ecf \u8fc7OUTPUT\u94fe\uff0c\u7136\u540e\u5230\u8fbePOSTROUTING\u94fe\u8f93\u51fa\u3002<\/p>\n\n\n\n<p>\uff083\uff09\u5982\u679c\u6570\u636e\u5305\u662f\u8981\u8f6c\u53d1\u51fa\u53bb\u7684\uff0c\u4e14\u5185\u6838\u5141\u8bb8\u8f6c\u53d1\uff0c\u6570\u636e\u5305\u5c31\u4f1a\u5982\u56fe\u6240\u793a\u5411\u53f3\u79fb\u52a8\uff0c\u7ecf\u8fc7 FORWARD\u94fe\uff0c\u7136\u540e\u5230\u8fbePOSTROUTING\u94fe\u8f93\u51fa\u3002<\/p>\n\n\n\n<p>\u7ed3\u6784\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" loading=\"lazy\" width=\"605\" height=\"375\" src=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2021\/02\/image-7.png\" alt=\"\" class=\"wp-image-246\" srcset=\"https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2021\/02\/image-7.png 605w, https:\/\/www.zhiwanyuzhou.com\/wp-content\/uploads\/2021\/02\/image-7-300x186.png 300w\" sizes=\"(max-width: 605px) 100vw, 605px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>\u5e38\u7528\u7684\u4e00\u4e9biptables\u7b56\u7565\uff1a<\/p>\n\n\n\n<p>\uff081\uff09\u62d2\u7edd\u8f6c\u53d1\u6765\u81ea192.168.2.33\u4e3b\u673a\u7684\u6570\u636e<\/p>\n\n\n\n<p>iptables -A FORWARD -s 192.168.2.33 -j REJECT<\/p>\n\n\n\n<p>\uff082\uff09\u5141\u8bb8\u8f6c\u53d1\u6765\u81ea192.168.2.1\/99\u7f51\u6bb5\u7684\u6570\u636e<\/p>\n\n\n\n<p>iptables -A FORWARD -s 192.168.2.1\/99 -j ACCEPT<\/p>\n\n\n\n<p>\uff083\uff09\u5141\u8bb8\u672c\u673a\u5f00\u653e\u4eceTCP\u7aef\u53e320-1024\u63d0\u4f9b\u7684\u5e94\u7528\u670d\u52a1\u3002<\/p>\n\n\n\n<p>iptables -A INPUT -p tcp --dport 20:1024 -j ACCEPT<\/p>\n\n\n\n<p>iptables -A OUTPUT -p tcp --sport 20:1024 -j ACCEPT<\/p>\n\n\n\n<p>\uff084\uff09\u53ea\u5141\u8bb8\u7ba1\u7406\u5458\u4ece202.13.0.0\/16\u7f51\u6bb5\u4f7f\u7528SSH\u8fdc\u7a0b\u767b\u5f55\u9632\u706b\u5899\u4e3b\u673a\u3002<\/p>\n\n\n\n<p>iptables -A INPUT -p tcp --dport 22 -s 202.13.0.0\/16 -j ACCEPT<\/p>\n\n\n\n<p>iptables -A INPUT -p tcp --dport 22 -j DROP<\/p>\n\n\n\n<p>\uff085\uff09\u5141\u8bb8\u8f6c\u53d1\u6765\u81ea192.168.0.0\/24\u5c40\u57df\u7f51\u6bb5\u7684DNS\u89e3\u6790\u8bf7\u6c42\u6570\u636e\u5305\u3002<\/p>\n\n\n\n<p>iptables -A FORWARD -s 192.168.0.0\/24 -p udp --dport 53 -j ACCEPT<\/p>\n\n\n\n<p>iptables -A FORWARD -d 192.168.0.0\/24 -p udp --sport 53 -j ACCEPT<\/p>\n\n\n\n<p>\uff086\uff09\u5c4f\u853dip 110.1.1.1\u7684\u8bbf\u95ee<\/p>\n\n\n\n<p>iptables -I INPUT -s 110.1.1.1 -j DROP<\/p>\n\n\n\n<p>\uff087\uff09\u5c4f\u853d\u4ece123.0.0.1\u5230123.255.255.254<\/p>\n\n\n\n<p>iptables -I INPUT -s 123.0.0.0\/8 -j DROP<\/p>\n\n\n\n<p>\uff088\uff09\u5c4f\u853d\u4ece\u4ece123.45.0.1\u5230123.45.255.254<\/p>\n\n\n\n<p>iptables -I INPUT -s 124.45.0.0\/16 -j DROP<\/p>\n\n\n\n<p>\uff089\uff09\u5c4f\u853d\u4ece\u4ece123.45.6.1\u5230123.45.6.254<\/p>\n\n\n\n<p>iptables -I INPUT -s 123.45.6.0\/24 -j DROP<\/p>\n\n\n\n<p>\uff0810\uff09\u5141\u8bb8\u6240\u6709\u672c\u673a\u5411\u5916\u7684\u8bbf\u95ee<\/p>\n\n\n\n<p>iptables -A OUTPUT -j ACCEPT<\/p>\n\n\n\n<p>\uff0812\uff09\u5141\u8bb8\u8bbf\u95ee22\u7aef\u53e3<\/p>\n\n\n\n<p>iptables -A INPUT -p tcp --dport 22 -j ACCEPT<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8def\u7531\u5668\u4e2d\u666e\u904d\u4f7f\u7528Iptables\u4f5c\u4e3a\u7f51\u7edc\u9632\u706b\u5899\u7ba1\u7406\u65b9\u6848\uff0cIptabels\u662f\u4e0e Linux\u5185\u6838\u96c6\u6210\u7684\u5305\u8fc7\u6ee4\u9632\u706b\u5899\u7cfb\u7edf\uff0c\u51e0\u4e4e\u6240\u6709\u7684linux\u53d1\u884c\u7248\u672c\u90fd\u4f1a\u5305\u542bIptables\u7684\u529f\u80fd\u3002\u5982\u679c Linux \u7cfb\u7edf\u8fde\u2026<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[11],"tags":[],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":5}},"_links":{"self":[{"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/posts\/245"}],"collection":[{"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/comments?post=245"}],"version-history":[{"count":3,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/posts\/245\/revisions"}],"predecessor-version":[{"id":249,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/posts\/245\/revisions\/249"}],"wp:attachment":[{"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/media?parent=245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/categories?post=245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhiwanyuzhou.com\/index.php\/wp-json\/wp\/v2\/tags?post=245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}