Xerox released version 10.6 of their firmware for the Phase 8560MFP printer with a bug, which prevents the navigation menu in the Webserver configuration to load in modern web browsers.
By running this proxy, we can rectify that:
# node xerox-proxy.js
Created proxy at http://localhost:8560/
Requests will be forwarded to http://xerox.:80/
Then simply point your browser to http://localhost:8560/.
Before you upgrade to the affected firmware version, make sure to disable https (SSL for pages) in the Xerox CentreWare webserver.