{"id":952,"date":"2021-05-17T01:23:26","date_gmt":"2021-05-17T01:23:26","guid":{"rendered":"http:\/\/www.liutianfeng.com\/?p=952"},"modified":"2022-06-15T06:39:22","modified_gmt":"2022-06-15T06:39:22","slug":"iptables","status":"publish","type":"post","link":"https:\/\/www.liutianfeng.com\/?p=952","title":{"rendered":"iptables"},"content":{"rendered":"

1\u3001CentOS7 iptables\u5982\u4f55\u4fdd\u5b58\uff1f<\/h3>\n

\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cCentOS7\u4f7f\u7528\u7684\u662ffirewalld\u670d\u52a1\uff0c\u4f7f\u7528iptables\u5e76\u60f3\u4fdd\u5b58\u7684\u8bdd\uff0c\u9700\u8981\u5c06firewalld\u670d\u52a1\u505c\u6389\uff0c\u5e76\u5b89\u88c5iptables-services\u3002<\/p>\n

> systemctl stop firewalld\r\n> systemctl disable firewalld\r\n> yum install -y iptables-services\r\n> service iptables save\r\niptables: Saving firewall rules to \/etc\/sysconfig\/iptables: [  OK  ]<\/code><\/pre>\n
iptables\u89c4\u5219\u624b\u52a8\u7ba1\u7406:<\/p>\n
\u914d\u7f6e\u6587\u4ef6\u4f4d\u7f6e: \/etc\/sysconfig\/iptables-config\r\n\u89c4\u5219\u4fdd\u5b58\u4f4d\u7f6e: \/etc\/sysconfig\/iptables\r\n\u624b\u52a8\u4fdd\u5b58\u547d\u4ee4: \/sbin\/iptables-save<\/code><\/pre>\n
2\u3001iptables\u00a0help<\/h3>\n
Arguments:\r\n\u6dfb\u52a0\uff1a-A, --append\r\n\u63d2\u5165: -I, --insert\r\n\u5220\u9664: -D, --delete\r\n\u66ff\u6362: -R, --replace\r\n\u5217\u8868: -L, --list\r\n\u6e05\u9664: -F, --flush\r\n\u5efa\u94fe: -N, --new\r\n\u5220\u94fe: -X, --delete-chain\r\n\u91cd\u547d\u540d\u94fe:  -E, --rename-chain, Exp: iptables -E old-chain new-chain\r\n\r\nOptions:\r\n\u534f\u8bae: -p, --protocol, [tcp|udp]\r\n\u6e90: -s, --source, Exp: iptables -s 10.10.10.10\r\n\u76ee\u6807: -d, --destination, Exp: iptables -p address[\/mask]\r\n\u8df3\u8f6ctarget: -j, --jump [ACCEPT, DROP, REJECT]\r\n\u8df3\u8f6cchain: -g, --goto, Exp: iptables ... -g my_chain\r\n\u884c\u53f7: --line-numbers\r\n\u8868: -t, --table, table to manipulate (default: `filter', All: filter,nat,mangle,raw,security)<\/code><\/pre>\n
3\u3001\u5e38\u7528iptables\u8bed\u53e5<\/h3>\n
iptables -A INPUT -p tcp -s ${MY_IP} --dport 8020 -j ACCEPT\r\niptables -A INPUT -p tcp --dport 8020 -j REJECT\r\niptables -nvL INPUT --line-numbers |grep 'tcp dpt:8020' |awk '{print $1}' |sort -r |xargs -i iptables -D INPUT {}\r\n# \u5339\u914d\u591aip\r\niptables -A INPUT -m iprange --src-range 13.32.4.168-13.32.4.176 -j ACCEPT  # \u5339\u914d\u6e90IP\r\niptables -A INPUT -m iprange --dest-range 8.8.8.2-8.8.8.22 -j DROP  # \u5339\u914d\u76ee\u6807IP\r\n\r\n# \u5339\u914d\u7aef\u53e3\u8303\u56f4\r\n--sport 22:80\r\n-m multiport --dport 21,22,23,80,3306\r\n\r\n# \u5339\u914d\u7f51\u7edc\u63a5\u53e3\r\n-i \u5339\u914d\u5305\u8fdb\u5165\u7684\u7f51\u5361\r\n-o \u5339\u914d\u5305\u6d41\u51fa\u7684\u7f51\u5361\r\n\r\n# icmp\u6709\u5f88\u591a\u7c7b\u578b\uff0c--icmp-type 8\u4ee3\u8868ping\r\n# \u7981ping\r\niptables -I INPUT -p icmp --icmp-type 8 -j DROP\r\niptables -I INPUT -p icmp --icmp-type 8 -s 10.0.0.0\/24 -j ACCEPT\r\n\r\n# \u5339\u914d\u7f51\u7edc\u72b6\u6001 -m state --state\r\n# \u5141\u8bb8\u5173\u8054\u7684\u72b6\u6001\u5305\u901a\u8fc7\uff0c\u4e00\u822c\u7528\u4e8eftp\u670d\u52a1\uff0c\u6bd4\u55bb\uff1a\u770b\u7535\u5f71\u51fa\u53bb\u63a5\u7535\u8bdd\u6216\u8005WC\uff0c\u56de\u6765\u4e5f\u5f97\u5141\u8bb8\u8fdb\u53bb\r\niptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT\r\niptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT<\/code><\/pre>\n
\u4f01\u4e1a\u7ea7\u9632\u706b\u5899\u90e8\u7f72<\/p>\n
# \u4e0d\u5141\u8bb8\u8fdb\u548c\u8f6c\u53d1\uff0c\u53ea\u5141\u8bb8\u51fa\u3002\u6700\u5b89\u5168\u7684\r\niptables -P INPUT DROP\r\niptables -P FORWARD DROP\r\niptables -P OUTPUT ACCEPT\r\n# \u5f00\u542f\u4fe1\u4efb\u7684IP\u7f51\u6bb5(\u591a\u7f51\u5361)\r\niptables -A INPUT -s 124.43.62.96\/27 -p all -j ACCEPT\r\niptables -A INPUT -s 192.168.1.0\/24 -p all -j ACCEPT\r\n# \u5141\u8bb8\u8bbf\u95ee80\u7aef\u53e3\r\niptables -A INPUT -p tcp --dport 80 -j ACCEPT\r\n# \u5141\u8bb8\u6240\u6709\u4ebaping\r\niptables -A INPUT -p icmp -m icmp --icmp-type any -j ACCEPT\r\n# \u5141\u8bb8\u5173\u8054\u7684\u72b6\u6001\u5305\r\niptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT\r\niptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT\r\n# \u4fdd\u5b58iptables\u914d\u7f6e\uff0c2\u79cd\u4fdd\u5b58\u65b9\u5f0f\r\n\/etc\/init.d\/iptables save\r\niptables-save > \/etc\/sysconfig\/iptables\r\n# iptables\u7ef4\u62a4\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u7f16\u8f91\/etc\/sysconfig\/iptables\r\nvim \/etc\/sysconfig\/iptables\r\n\/etc\/init.d\/iptables restart|reload # \u7f16\u8f91\u540e\u91cd\u542f<\/code><\/pre>\n
\u5171\u4eab\u4e0a\u7f51<\/p>\n
# \u8f7d\u5165\u5185\u6838\u6a21\u5757\r\nmodprobe ip_tables\r\nmodprobe iptables_filter\r\nmodprobe iptables_nat\r\nmodprobe ip_conntrack\r\nmodprobe ip_conntrack_ftp\r\nmodprobe ip_nat_ftp\r\nmodprobe ipt_state\r\n# \u5c40\u57df\u7f51\u5171\u4eab\r\n# \u65b9\u6cd51\uff1a \u9002\u5408\u4e8e\u6709\u56fa\u5b9a\u5916\u7f51IP\u7684,\u5728\u6709\u56fa\u5b9a\u5916\u7f51IP\u7684\u670d\u52a1\u5668\u6267\u884c\uff1a\r\niptables -t nat -A POSTROUTING -s 192.168.1.0\/24 -o eth0 -j SNAT --to-source 10.0.0.7\r\n# 192.168.1.0\/24\u662f\u5185\u7f51\u5730\u5740\u6bb5(\u529e\u516c\u5ba4\u6216IDC\u5185\u7f51\u6bb5)\uff0c10.0.0.7\u662f\u5916\u7f51IP\r\n# \u65b9\u6cd52\uff1a\u9002\u5408\u53d8\u5316\u7684\u5916\u7f51\u5730\u5740\uff08ADSL\uff09\r\niptables -t nat -A POSTROUTING -s 192.168.1.0\/24 -j MASQUERADE\r\n# MASQUERADE \u8868\u793a\u4f2a\u88c5,\u5916\u7f51IP\u5730\u5740\u4e0d\u7a33\u5b9a\u7684\u60c5\u51b5\u5373\u53ef\u4f7f\u7528MASQUERADE(\u52a8\u6001\u4f2a\u88c5),\u80fd\u591f\u81ea\u52a8\u7684\u5bfb\u627e\u5916\u7f51\u5730\u5740\u5e76\u6539\u4e3a\u5f53\u524d\u6b63\u786e\u7684\u5916\u7f51IP\u5730\u5740<\/code><\/pre>\n
\u7aef\u53e3\u6620\u5c04<\/p>\n
# \u573a\u666f\uff1a\u6d4f\u89c8\u5668\u4e2d\u8bbf\u95ee 13.32.4.61:8088\uff0c\u80fd\u591f\u6620\u5c04\u8f6c\u6362\u523013.32.161.250:8088\r\n# \u572813.32.4.61\u4e0a\u6267\u884c\r\niptables -t nat -A PREROUTING -d 13.32.4.61 -p tcp --dport 8088 -j DNAT --to 13.32.161.250:8088\r\niptables -t nat -A POSTROUTING -d 13.32.161.250 -p tcp --dport 8088 -j SNAT --to 13.32.4.61\r\n\r\n# \u8fd8\u53ef\u4ee5\u4f7f\u7528REDIRECT\u5355\u72ec\u8fdb\u884c\u7aef\u53e3\u8f6c\u6362\r\n# \u4f8b\uff1a\u5c06 80 \u7aef\u53e3\u7684\u5c01\u5305\u8f6c\u9012\u5230 8080\u7aef\u53e3\r\niptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080\r\n# \u4f7f\u7528 8080 \u8fd9\u4e2a port \u6765\u542f\u52a8 WWW \uff0c\u4f46\u662f\u522b\u4eba\u90fd\u752880\u6765\u8054\u673a<\/code><\/pre>\n
iptables\u5e38\u7528\u4f01\u4e1a\u6848\u4f8b<\/p>\n
linux\u4e3b\u673a\u9632\u706b\u5899\uff08\u8868: filter  \u94fe: INPUT\uff09\r\n\u5c40\u57df\u7f51\u673a\u5668\u5171\u4eab\u4e0a\u7f51\uff08\u8868: nat  \u94fe: POSTROUTING\uff09\r\n\u5916\u90e8\u5730\u5740\u548c\u7aef\u53e3\uff0c\u6620\u5c04\u4e3a\u5185\u90e8\u5730\u5740\u548c\u7aef\u53e3\uff08\u8868: nat  \u94fe: PREROUTING\uff09\r\n\r\n# \u5b9e\u73b0\u5916\u7f51IP 124.42.34.112 \u4e00\u5bf9\u4e00\u6620\u5c04\u5230\u5185\u90e8 10.0.0.8\r\n# \u7f51\u5173IP eth0:124.42.60.109 eth1:10.0.0.254\r\n# \u9996\u5148\u5728\u8def\u7531\u7f51\u5173\u4e0a\u7ed1\u5b9aVIP 124.42.34.112\uff0c\u53ef\u4ee5\u662f\u522b\u540d\u7684\u65b9\u5f0f\u3002\r\niptables -t nat -A POSTROUTING -s 10.0.0.0\/255.255.240.0 -d 124.42.34.112 -j SNAT --to-source 10.0.0.254\r\niptables -t nat -A PREROUTING -d 124.42.34.112 -j DNAT --to-destination 10.0.0.8\r\niptables -t nat -A POSTROUTING -s 10.0.0.8 -o eth0 -j SNAT --to-source 124.42.34.112<\/code><\/pre>\n
 <\/p>\n
\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1aliutianfeng.com<\/a> » iptables<\/a><\/p>","protected":false},"excerpt":{"rendered":"
1\u3001CentOS7 iptables\u5982\u4f55\u4fdd\u5b58\uff1f \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cCentOS7\u4f7f\u7528\u7684\u662ffirewalld\u670d\u52a1\uff0c\u4f7f\u7528 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/952"}],"collection":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=952"}],"version-history":[{"count":6,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/952\/revisions"}],"predecessor-version":[{"id":1364,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/952\/revisions\/1364"}],"wp:attachment":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=952"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=952"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}