iptables配置

iptables -F

iptables -P INPUT DROP

iptables -P FORWARD DROP

iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

iptables -A INPUT -i lo -p all -j ACCEPT

iptables -A INPUT -p icmp -j ACCEPT

iptables -A INPUT -p tcp --dport 22 -j ACCEPT

iptables -A INPUT -p tcp --dport 53 -j ACCEPT

iptables -A INPUT -p udp --dport 53 -j ACCEPT

iptables -A INPUT -p tcp --dport 80 -j ACCEPT

iptables -A INPUT -p tcp --dport 443 -j ACCEPT