I have a client with an HP media server sitting behind a RED. Is it possible to get the server web accessible while maintaining vpn routing to the other devices?
I think what you are asking is if you can forward specific ports on the RED's public IP to the server on the inside of the RED? What consumer routers call "Port Forwarding?"
RED is strictly a VPN router with no local management capability. so I don't believe you can. If you want to do more then just VPN, you need to look into a full UTM device.