Thanks for the report. I get

Thanks for the report. I get it now. It's weird, your VPN setup should just forward everything like if you where on the local network. So, MDTK or any other application should just work. If you run into this problem and want to help, go in Commander's help mesh, hit "Show Debug Information...", try to connect and send us the debug log.

Also, if your are going to be managing lots of machines all over the Internet, check out Meshcentral.com. You can setup all your machines on the server and do web based hardware KVM, IDE-R and piles more for free. The entire site is open source, so you can setup your own instance of meshcentral. The main benefit over what you are doing is that you don't need a VPN. Machines can move all over the Internet and you still can manage them using a web site.

Ylian