SoftEther VPN is a multi-protocol session muxer which effectively creates overlay networks from multiple VPN connections over different protocols, with some advanced egress busting functionality, and support for all major platforms.
The suite consists of server, bridge, and client, providing L2 and L3 encapsulations for protocols like SSTP which are not available otherwise. I can't imagine this is trivial to implement, but it should provide significant coverage for client and mesh protocols, so may well be worth while.
SoftEther VPN is a multi-protocol session muxer which effectively creates overlay networks from multiple VPN connections over different protocols, with some advanced egress busting functionality, and support for all major platforms.
The suite consists of server, bridge, and client, providing L2 and L3 encapsulations for protocols like SSTP which are not available otherwise. I can't imagine this is trivial to implement, but it should provide significant coverage for client and mesh protocols, so may well be worth while.