Alepo works great with mikrotik. The default NAS works but you will not be able to use certain radius attributes till you include the ones known by mikrotik. You need to create custom radius dictonary file for Mikrotik and modify the Nascfgdbs files under \RBSServ\raddb\ to point to this file. This is the only way you can get the mikrotik vendor attributes to work.
We use RBS to assign pools, ip addresses, hotspot profiles, PPP profiles, dynamic queues, firewall chains, caller ids (mac) and more to user accounts. I'm busy these days and hardly check the forum. Anybody needing the modified radius files and instructions for Alepo please email me - firstname.lastname@example.org