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大蝦幫幫忙��！
echo 1 >; /proc/sys/net/ipv4/ip_forward
INET_IF="eth0"
EXT_IF="eth0"
LAN_IF="eth1"
LAN_IP="192.168.0.1"
LAN_IP_RANGE="192.168.0.0/24"
WAN_IP="61.101.xxx.xxx"
LO_IF="lo"
LO_IP="127.0.0.1"
modprobe ip_tables
modprobe ip_nat_ftp
modprobe ip_conntrack
modprobe ip_conntrack_ftp
modprobe ipt_state
modprobe ip_nat_irc
modprobe ip_conntrack_irc
iptables -F -t filter
iptables -X -t filter
iptables -Z -t filter
iptables -F -t mangle
iptables -X -t mangle
iptables -Z -t mangle
iptables -F -t nat
iptables -X -t nat
iptables -Z -t nat
iptables -P INPUT DROP
iptables -P OUTPUT ACCEPT
iptables -P FORWARD DROP
iptables -t nat -P PREROUTING ACCEPT
iptables -t nat -P POSTROUTING ACCEPT
iptables -t nat -P OUTPUT ACCEPT
iptables -A INPUT -p icmp -i lo -j ACCEPT
iptables -A OUTPUT -p icmp -o lo -j ACCEPT
iptables -A INPUT -p ALL -i $LAN_IF -s $LAN_IP_RANGE -j ACCEPT
iptables -A OUTPUT -p ALL -o $LAN_IF -d $LAN_IP_RANGE -j ACCEPT
iptables -A INPUT -p ALL -i $INET_IF -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A OUTPUT -p ALL -o $INET_IF -j ACCEPT
iptables -N allowed
iptables -N bad_tcp_packets
iptables -N icmp_packets
iptables -A allowed -p tcp --syn -j ACCEPT
iptables -A allowed -p tcp -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A allowed -p tcp -j DROP
iptables -A bad_tcp_packets -p tcp --tcp-flags SYN,ACK SYN,ACK -m state --state NEW -j REJECT --reject-with tcp-reset
iptables -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j LOG --log-prefix "New not syn:"
iptables -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j DROP
iptables -A icmp_packets -p icmp -s 0/0 --icmp-type 8 -j ACCEPT
iptables -A icmp_packets -p icmp -s 0/0 --icmp-type 11 -j ACCEPT
iptables -A INPUT -p tcp -j bad_tcp_packets
iptables -A INPUT -p icmp -i $INET_IF -j icmp_packets
iptables -A INPUT -m limit --limit 3/minute --limit-burst 3 -j LOG --log-level INFO --log-prefix "IPT INPUT packets died:"
iptables -A INPUT -p udp -i $LAN_IF --dport 67 --sport 68 -j ACCEPT
iptables -A FORWARD -p tcp -j bad_tcp_packets
iptables -A FORWARD -o $INET_IF -s $LAN_IP_RANGE -j ACCEPT
iptables -A FORWARD -i $INET_IF -d $LAN_IP_RANGE -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A FORWARD -m limit --limit 3/minute --limit-burst 3 -j LOG --log-level DEBUG --log-prefix "IPT FORWARD packets died:"
iptables -A FORWARD -f -m limit --limit 100/s --limit-burst 100 -j ACCEPT
iptables -A FORWARD -p icmp -m limit --limit 1/s --limit-burst 10 -j ACCEPT
iptables -A FORWARD -p udp -d $LAN_IP_RANGE -i $EXT_IF -j ACCEPT
iptables -t nat -A PREROUTING -i $LAN_IF -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 3128
iptables -t nat -A POSTROUTING -o $INET_IF -s $LAN_IP_RANGE -j SNAT --to $WAN_IP |
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免費(fèi)注冊
發(fā)表于 2004-05-17 09:36
