Centos deactivate firewall
Just type the follwing :
/sbin/service iptables save
/sbin/service ip6tables save
/sbin/service iptables off
/sbin/service ip6tables off
/sbin/service iptables stop
/sbin/service ip6tables stop
off -> turn off the firewall.
stop -> stop the firewall and open system.
iptables -> IPv4 firewall.
ip6tables -> IPv6 firewall.
