07. The firewall opens port 3306
iptables -A INPUT -p tcp --dport 3306 -j ACCEPT
iptables -A OUTPUT -p tcp --sport 3306 -j ACCEPT
07. The firewall opens port 3306
iptables -A INPUT -p tcp --dport 3306 -j ACCEPT
iptables -A OUTPUT -p tcp --sport 3306 -j ACCEPT