I have an untangle combined with a couple of Ubiquiti APs, using the Untangle captive portal. The physical environment is a collaboration/co-working type of place and overall the setup is working great. The known devices though is now at 1,900 known devices since the unit went online last year. Is there any way to auto-delete these? Half of them haven't been seen in the last 6 months or longer, only a couple hundred in the two months.

It seems I only have the option of razed earth- delete the entire list, or manually clicking on a few hundred items. Any other ideas? Or does it not even matter?