Using the fallback tuner you can pull channel lists and EPG towards you as well. The main difference with RemoteStreamConverter is that the last one works per bouquet, the fallbacks copies the entire channel list.
I maintain my list on a box with both S and T tuners, and all others use the fallback mechanism to pull this channel list towards them. They pull EPG from my livingroom box which runs EPGrefresh and EPGimport.
As to authenication, there is a "Customize OpenWebIf settings for fallback tuner". Set it to yes, and you can define a username, password and/or alternative port number.