I have connected my Polycom HDX8000 to the cisco 857 router. I assigned public IP to the hdx device so there's no NAT relations. However, after dialing call the connection is established but far site cannot see or hear me.
This technical paper will help you implement VMware’s VM encryption as well as implement Veeam encryption which together will achieve the nothing ever in the clear goal. If a bad guy steals VMs, backups or traffic they get nothing.