Most NAT devices cannot look into a packet past the TCP/UDP level if there is embedded information in the packet. In your case, because additional address information is embedded inside the data portion of the packet, the voice will not work through NAT.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.