I'm currently working on a project where I need a router/firewall to manage quite a few devices. The devices will be on a large LAN (similar setup to a WISP) and I will need to easily be able to authenticate them, preferably using the MAC address. I then need to control their data usage per month, and will have different monthly data limits, based on the plans that they subscribed to. After this I will also need to be able to do some basic QOS/filtering to eliminate/limit data intensive traffic.

I would like to go with MikroTik for the router as it seems it has everything that I would need. It does look like I will need a different Radius Server or management software of some kind to simplify the management/billing portion. Does anyone have any recommendations on a Raidus Server/Management software? Or is this even possible?