I have been using the free version of this software on my android phone with Wake-On-Lan to wake up and remote control my home PC over the internet, outside of my home network.
I have read, that for improved security, I really should be doing this through a VPN such as "Open VPN". Before I start jumping through a bunch of hoops to set this VPN up on my home router and Android phone, I thought this may not be a a valid statement regarding the security risk since this Team Viewer connection is not through any open ports but rather through the to two Team Viewer apps talking to each other on the two devices. Is this the case or do I need Open VPN (or PPTP VPN)?