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[root@localhost~]# iptables -F #清楚防火墙规则 [root@localhost~]# iptables -L #查看防火墙规则 [root@localhost~]# iptables -A INPUT -p tcp --dport 80 -j ACCEPT [root@localhost~]# iptables -A INPUT -p tcp --dport 22 -j ACCEPT [root@localhost~]# iptables -A INPUT -p tcp --dport 53 -j ACCEPT [root@localhost~]# iptables -A INPUT -p udp --dport 53 -j ACCEPT [root@localhost~]# iptables -A INPUT -p udp --dport 123 -j ACCEPT [root@localhost~]# iptables -A INPUT -p icmp -j ACCEPT [root@localhost~]# iptables -P INPUT DROP [root@localhost~]# /etc/init.d/iptables save |