It might sound crazy but could we use pritunl zero just as a reserve proxy by not enabling all the “zero trust” features ? 
It doesn’t currently have load balancing features, this may change in the future when the load balancing code from Pritunl Cloud is integrated into Pritunl Zero. It can be used to add SSL to existing web services. Setting permitted networks to 0.0.0.0/0 will disable any authentication for the service.
can not wait for the load balancing feature so pritunl zero could be used as a load balancer for pritunl vpn