diff --git a/beaglebone.txt b/beaglebone.txt
index f949fc50..9dfc8283 100644
--- a/beaglebone.txt
+++ b/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