Suitable (and open source) replacement: https://github.com/zerotier/ZeroTierOne https://github.com/zerotier/ZeroTierOne https://www.zerotier.com/ https://www.

Suitable (and open source) replacement: https://github.com/zerotier/ZeroTierOne https://github.com/zerotier/ZeroTierOne https://www.zerotier.com/ https://www.zerotier.com/ Also does a lot of other things, and is evolving into a full-fledged SDN layer. If you don't want to use the pretty GUI they give you to create/manage networks you can run your own 'network controller' -- see READMEs in GitHub.