Right click the red A, click edit settings.
If you have a thing saying "HomeHDA > " then mouse over and click edit settings. Change " proto udp" to " proto tcp".
If for some reason the DDNS (yourhda.com) is not working but your control panel is updating, the add this line at the top of the config file.
remote YOUR_IP_HERE
== Client Side (Linux/Mac) ==
Similarly, locate the configuration file and change
proto udp
to
proto tcp
== On the Server side ==