iptables 常用配置
常用的IPTABLES规则如下：

只能收发邮件，别的都关闭
iptables -I Filter -m mac mac-source 00:0F:EA:25:51:37 -j DROP
iptables -I Filter -m mac mac-source 00:0F:EA:25:51:37 -p udp dport 53 -j ACCEPT
iptables -I Filter -m mac mac-source 00:0F:EA:25:51:37 -p tcp dport 25 -j ACCEPT
iptables -I Filter -m mac mac-source 00:0F:EA:25:51:37 -p tcp dport 110 -j ACCEPT
IPSEC NAT 策略
iptables -I PFWanPriv -d 192.168.100.2 -j ACCEPT
iptables -t nat -A PREROUTING -p tcp dport 80 -d $INTERNET_ADDR -j DNAT to-destination 192.168.100.2:80

iptables -t nat -A PREROUTING -p tcp dport 1723 -d $INTERNET_ADDR -j DNAT to-destination 192.168.100.2:1723

iptables -t nat -A PREROUTING -p udp dport 1723 -d $INTERNET_ADDR -j DNAT to-destination 192.168.100.2:1723

iptables -t nat -A PREROUTING -p udp dport 500 -d $INTERNET_ADDR -j DNAT to-destination 192.168.100.2:500

iptables -t nat -A PREROUTING -p udp dport 4500 -d $INTERNET_ADDR -j DNAT to-destination 192.168.100.2:4500


FTP服务器的NAT
iptables -I PFWanPriv -p tcp dport 21 -d 192.168.100.200 -j ACCEPT
iptables -t nat -A PREROUTING -p tcp dport 21 -d $INTERNET_ADDR -j DNAT to-destination 192.168.100.200:21
只允许访问指定网址
iptables -A Filter -p udp dport 53 -j ACCEPT
iptables -A Filter -p tcp dport 53 -j ACCEPT
iptables -A Filter -d www.3322.org -j ACCEPT
iptables -A Filter -d img.cn99.com -j ACCEPT
iptables -A Filter -j DROP
开放一个IP的一些端口，其它都封闭
iptables -A Filter -p tcp dport 80 -s 192.168.100.200 -d www.pconline.com.cn -j ACCEPT
iptables -A Filter -p tcp dport 25 -s 192.168.100.200 -j ACCEPT
iptables -A Filter -p tcp dport 109 -s 192.168.100.200 -j ACCEPT
iptables -A Filter -p tcp dport 110 -s 192.168.100.200 -j ACCEPT
iptables -A Filter -p tcp dport 53 -j ACCEPT
iptables -A Filter -p udp dport 53 -j ACCEPT
iptables -A Filter -j DROP
多个端口
iptables -A Filter -p tcp -m multiport destination-port 22,53,80,110 -s 192.168.20.3 -j REJECT
连续端口
iptables -A Filter -p tcp -m multiport source-port 22,53,80,110 -s 192.168.20.3 -j REJECT iptables -A Filter -p tcp source-port 2:80 -s 192.168.20.3 -j REJECT
指定时间上网
iptables -A Filter -s 10.10.10.253 -m time timestart 6:00 timestop 11:00 days Mon,Tue,Wed,Thu,Fri,Sat,Sun -j DROP
iptables -A Filter -m time timestart 12:00 timestop 13:00 days Mon,Tue,Wed,Thu,Fri,Sat,Sun -j ACCEPT
iptables -A Filter -m time timestart 17:30 timestop 8:30 days Mon,Tue,Wed,Thu,Fri,Sat,Sun -j ACCEPT

禁止多个端口服务
iptables -A Filter -m multiport -p tcp dport 21,23,80 -j ACCEPT
将WAN 口NAT到PC
iptables -t nat -A PREROUTING -i $INTERNET_IF -d $INTERNET_ADDR -j DNAT to-destination 192.168.0.1


将WAN口8000端口NAT到192。168。100。200的80端口
iptables -t nat -A PREROUTING -p tcp dport 8000 -d $INTERNET_ADDR -j DNAT to-destination 192.168.100.200:80
MAIL服务器要转的端口
iptables -t nat -A PREROUTING -p tcp dport 110 -d $INTERNET_ADDR -j DNAT to-destination 192.168.100.200:110
iptables -t nat -A PREROUTING -p tcp dport 25 -d $INTERNET_ADDR -j DNAT to-destination 192.168.100.200:25
只允许PING 202。96。134。133,别的服务都禁止
iptables -A Filter -p icmp -s 192.168.100.200 -d 202.96.134.133 -j ACCEPT
iptables -A Filter -j DROP

禁用BT配置
iptables A Filter p tcp dport 6000:20000 j DROP

禁用QQ防火墙配置
iptables -A Filter -p udp dport ! 53 -j DROP
iptables -A Filter -d 218.17.209.0/24 -j DROP
iptables -A Filter -d 218.18.95.0/24 -j DROP
iptables -A Filter -d 219.133.40.177 -j DROP

基于MAC，只能收发邮件，其它都拒绝
iptables -I Filter -m mac mac-source 00:0A:EB:97:79:A1 -j DROP
iptables -I Filter -m mac mac-source 00:0A:EB:97:79:A1 -p tcp dport 25 -j ACCEPT
iptables -I Filter -m mac mac-source 00:0A:EB:97:79:A1 -p tcp dport 110 -j ACCEPT

禁用MSN配置
iptables -A Filter -p udp dport 9 -j DROP
iptables -A Filter -p tcp dport 1863 -j DROP
iptables -A Filter -p tcp dport 80 -d 207.68.178.238 -j DROP
iptables -A Filter -p tcp dport 80 -d 207.46.110.0/24 -j DROP

只允许PING 202。96。134。133 其它公网IP都不许PING
iptables -A Filter -p icmp -s 192.168.100.200 -d 202.96.134.133 -j ACCEPT
iptables -A Filter -p icmp -j DROP

禁止某个MAC地址访问internet:
iptables -I Filter -m mac mac-source 00:20:18:8F:72:F8 -j DROP

禁止某个IP地址的PING:
iptables A Filter p icmp s 192.168.0.1 j DROP

禁止某个IP地址服务：
iptables A Filter -p tcp -s 192.168.0.1 dport 80 -j DROP
iptables A Filter -p udp -s 192.168.0.1 dport 53 -j DROP

只允许某些服务，其他都拒绝(2条规则)
iptables -A Filter -p tcp -s 192.168.0.1 dport 1000 -j ACCEPT
iptables -A Filter -j DROP

禁止某个IP地址的某个端口服务
iptables -A Filter -p tcp -s 10.10.10.253 dport 80 -j ACCEPT
iptables -A Filter -p tcp -s 10.10.10.253 dport 80 -j DROP

禁止某个MAC地址的某个端口服务

iptables -I Filter -p tcp -m mac mac-source 00:20:18:8F:72:F8 dport 80 -j DROP

禁止某个MAC地址访问internet:
iptables -I Filter -m mac mac-source 00:11:22:33:44:55 -j DROP

禁止某个IP地址的PING:
iptables A Filter p icmp s 192.168.0.1 j DROP

原文地址：http://help.lampok.net/log/?p=15