清空iptables防火墙

iptables -t nat -F

iptables -t nat -X

iptables -t nat -P PREROUTING ACCEPT

iptables -t nat -P POSTROUTING ACCEPT

iptables -t nat -P OUTPUT ACCEPT

iptables -t mangle -F

iptables -t mangle -X

iptables -t mangle -P PREROUTING ACCEPT

iptables -t mangle -P INPUT ACCEPT

iptables -t mangle -P FORWARD ACCEPT

iptables -t mangle -P OUTPUT ACCEPT

iptables -t mangle -P POSTROUTING ACCEPT

iptables -F

iptables -X

iptables -P FORWARD ACCEPT

iptables -P INPUT ACCEPT

iptables -P OUTPUT ACCEPT

iptables -t raw -F

iptables -t raw -X

iptables -t raw -P PREROUTING ACCEPT

iptables -t raw -P OUTPUT ACCEPT

service iptables save