setting iptables on centos 6 : <br />1/ iptables -F <br />2/ iptables -A INPUT -i lo -j ACCEPT <br />3/ iptables -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT <br />4/ iptables -A INPUT -p tcp -m tcp --dport 443 -j ACCEPT <br />5/ iptables -A INPUT -p tcp -m tcp --dport 5901 -j ACCEPT <br />6/ iptables -P OUTPUT ACCEPT <br />7/ iptables-save | sudo tee /etc/sysconfig/iptables <br />8/ service iptables restart
