ZeroTier and Nebula are the only modern alternatives I personally know about. https://www.zerotier.com https://www.zerotier.com https://github.com/slackhq/neb

ZeroTier and Nebula are the only modern alternatives I personally know about. https://www.zerotier.com https://www.zerotier.com https://github.com/slackhq/nebula https://github.com/slackhq/nebula Disclosure: I wrote and founded ZeroTier. Listed Nebula too for neutrality and completeness.