implementing a radius solution with astaro

I have always been wanting to put astaro in my small network mix but have failed due to things i want not being available with it.

about a week ago i purchased Radius Manager which is as the name implies a radius script with a pretty front-end written in php. very nicely done and allows a lot of features for those wanting to do things via a web gui.

most important feature of radius manager is the ability to create a user limit their usage download and upload speed.
Now. i know in astaro you can goto Definitions and Users --> Servers --> New Authentication Server --> Backend -- Radius -- then we can fill in the required info. Now obviously the user database is on the radius manager server.

Its worth mentioning that i currently employ radius manager to work with my Mikrotik router which it supports real well for Hotspot and PPPoE authentication.

Now back to the subject. Its obvious that in the mikrotik hotspot world when a user wants access they open a browser, get a login page and they fill in their name and password ... it authenticates with the radius server and then they get access.

What are the options in the astaro world? can we get a browser login dialog box or anything similar? i really dont want to install a client on anyones machine.

Thank you.