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As i play further, with “enable sharing for new devices” disabled, then devices that try to play TS content have both an upper and lower case mac address listed.
The upper case address is enabled and the lower case disabled but the device cannot access any content - access is denied (PC: WMP, MediaMonkey, PVR, Phone app, etc)
Although, if you browse to the TS page (xxx:9000), you can play the content from there without any issue.
It’s not possible to enable the lower case mac address. or at least, checking it and saving the change(s) doesn;t work.

With the “enable sharing…” enabled, then only the lower case address is shown and streaming is enabled to all devices.
Try and disable a device, and then the upper case address is listed. The lower case address remains enabled, the upper case address is disabled - the reverse of the situation above.
But you can still play content.

Um… Make any sense?

Looks like i’ll be automatically enabling access to all our visitors then…
I saw a password setting somewhere - i may take a look, but i’m not sure i want to try it if its going to be this flaky…

Mal