I use zeroshell for quite a long time to load balance 2 DSLs links.
It’s working great.
But most of the traffic is load balanced by session, and sometime I have some issues with website showing that I have potentially 2 ips ! 🙁
I would be very interested in working on the support for the development of a real tunneling aggregation as it’s performed by https://www.ovhtelecom.fr/overthebox/
The idea would be to have a server located on the cloud running an openvpn server, and zeroshell could loadbalance the traffic up to this ip.