@storageninja said in Ubiquiti Security Gateway:

Agent based network abstraction is an interesting alternative to traditional VPN.

It's still traditional VPN, though. Other than automating the configuration, it's all stuff you could have done with OpenVPN or whatever decades ago. It's nice that it auto-configures and it is a great product (or was, appears mostly abandoned now) but it's not an alternative or new VPN, it's just a mesh VPN setup.