朋友公司的web服务器的iptables脚本

王朝other·作者佚名 2008-05-21

echo "##################kernel sys##################"

echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_all

echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts

echo "0" > /proc/sys/net/ipv4/conf/all/accept_source_route

for interface in /proc/sys/net/ipv4/conf/*/accept_redirects; do

echo "0" > ${interface}

done

echo "1" > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses

echo "1" > /proc/sys/net/ipv4/conf/all/log_martians

echo "###########################starting firewall##############"

iptables -F

iptables -X

iptables -I INPUT -p icmp --icmp-type echo-request -m limit --limit 6/min --limit-burst 4 -j ACCEPT

# NMAP FIN/URG/PSH

iptables -A INPUT -i eth0 -p tcp --tcp-flags ALL FIN,URG,PSH -j DROP

# Xmas Tree

iptables -A INPUT -i eth0 -p tcp --tcp-flags ALL ALL -j DROP

# Another Xmas Tree

iptables -A INPUT -i eth0 -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP

# Null Scan(possibly)

iptables -A INPUT -i eth0 -p tcp --tcp-flags ALL NONE -j DROP

# SYN/RST

iptables -A INPUT -i eth0 -p tcp --tcp-flags SYN,RST SYN,RST -j DROP

# SYN/FIN -- Scan(possibly)

iptables -A INPUT -i eth0 -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP

iptables -N synfoold

iptables -A synfoold -p tcp --syn -m limit --limit 1/s --limit-burst 4 -j RETURN

iptables -A synfoold -p tcp -j REJECT --reject-with tcp-reset

iptables -A INPUT -p tcp -m state --state NEW -j synfoold

iptables -N bad-ping

iptables -A bad-ping -p icmp --icmp-type echo-request -m limit --limit 1/s -j RETURN

iptables -A bad-ping -p icmp -j REJECT

iptables -I INPUT -p icmp --icmp-type echo-request -m state --state NE* -* *ad-ping

#iptables -t nat -A PREROUTING -p tcp --dport 22 -j REDIRECT --to-ports 1234