Both client proxies leverage a shared service to manage
token authentication called nova-consoleauth. This service must be running
for either proxy to work. Many proxies of either type can be run
against a single nova-consoleauth service in a cluster
configuration.
Do not confuse the nova-consoleauth shared service with
nova-console, which is a XenAPI-specific
service that most recent VNC proxy architectures do not
use.
