I work part-time for my university's help desk and I was both impressed and disappointed the first time I came across one of these--one the one hand, its highly customizable and supports SSH access. On the other hand, there is shockingly no way to get the MAC address without connecting via SSH, even though this is popular among academics who often need to get onto MAC filtered networks. In hindsight, we probably coul…
You could also of course turn off the ineffective MAC filtering, was this option considered?
0: https://remarkablewiki.com/tips/wifi
(Also, given that OP's a part time helpdesk person, they can't turn the MAC filtering off anyway).