Little Snitch automatically turning filter off? This issue happens to me in both my rMBP 13 and my Mac Pro. As I understand it, Little Snitch is not applying the rules when the network filter is off:



But why does it turn itself off from time to time? I always have manually to restart the filter.
That's its demo behaviour, it will run for 3 hours then switch off.

Check it thinks it's authorised.
'Open Little Snitch Preferences...'
Registration tab



Also, as you are running it on 2 computers, ensure you have a separate Registration for each [or a Family License] otherwise if it sees 'itself' on the network it will switch off.

You are correct in your assumption that it is not applying the Rules when the Network Filter is off.