/usr/local/cpanel/cpsrvd

Or 

/scripts/configure_firewall_for_cpanel

/usr/local/cpanel/cpsrvd

iptables -P INPUT ACCEPT

iptables -P FORWARD ACCEPT

iptables -P OUTPUT ACCEPT

iptables -t nat -F

iptables -t mangle -F

iptables -F

iptables -X