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| 关键词： FORWARD ACCEPT dport IPT iptables DROP INPUT tcp OUTPUT MAILSER |
#Set variable IPT=/sbin/iptables MAILSER=192.168.1.1 #Load module modprobe ip_conntrack modprobe ip_conntrack_ftp #clear and flush rule $IPT -F $IPT -X #Set default policy $IPT -P INPUT DROP $IPT -P FORWARD DROP $IPT -P OUTPUT DROP #Set input chain $IPT -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT $IPT -A INPUT -p tcp --dport 22 -j LOG --log-level 5 --log-prefix "IPTABLES:" $IPT -A INPUT -p tcp -d $MAILSER --dport 22 -j ACCEPT $IPT -A INPUT -p tcp -d $MAILSER --dport 80 -j ACCEPT $IPT -A INPUT -p udp --dport 53 -j ACCEPT $IPT -A INPUT -i lo -j ACCEPT $IPT -A INPUT -p tcp -d $MAILSER --dport 25 -j ACCEPT $IPT -A INPUT -p tcp -d $MAILSER --dport 110 -j ACCEPT $IPT -A INPUT -p tcp -d $MAILSER --dport 143 -j ACCEPT #Set output chain $IPT -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT $IPT -A OUTPUT -p udp --sport 53 -j ACCEPT $IPT -A OUTPUT -o lo -j ACCEPT $IPT -A OUTPUT -p tcp --sport 25 -j ACCEPT $IPT -A OUTPUT -p tcp --sport 110 -j ACCEPT $IPT -A OUTPUT -p tcp --sport 143 -j ACCEPT #Set forward chain $IPT -A POSTROUTING -t nat -s 192.168.0.0/24 -o eth0 -j MASQUERADE $IPT -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT $IPT -A FORWARD -s 192.168.0.0/24 -j ACCEPT #4444/445/69/135/139 iptables -A FORWARD -p tcp --dport 4444 -j DROP iptables -A FORWARD -p udp --dport 4444 -j DROP # iptables -A FORWARD -p tcp --dport 445 -j DROP iptables -A FORWARD -p udp --dport 445 -j DROP # iptables -A FORWARD -p tcp --dport 69 -j DROP iptables -A FORWARD -p udp --dport 69 -j DROP # iptables -A FORWARD -p tcp --dport 135 -j DROP iptables -A FORWARD -p udp --dport 135 -j DROP # iptables -A FORWARD -p tcp --dport 139 -j DROP iptables -A FORWARD -p udp --dport 139 -j DROP # echo 1 > /proc/sys/net/ipv4/ip_forward #echo finish messages echo "finish !!!" |
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