Restore block on port 3306

beaglebone.txt

@@ -1257,6 +1257,7 @@ iptables -A INPUT -p tcp --destination-port 137 -j DROP
 iptables -A INPUT -p tcp --destination-port 4242 -j DROP
 iptables -A INPUT -p tcp --destination-port 9050 -j DROP
 iptables -A INPUT -p tcp --destination-port 3000 -j DROP
+iptables -A INPUT -p tcp --destination-port 3306 -j DROP
 iptables -A INPUT -p udp --destination-port 1 -j DROP
 iptables -A INPUT -p udp --destination-port 7 -j DROP
 iptables -A INPUT -p udp --destination-port 109:111 -j DROP