mpd + pf binat

[Ganbold Tsagaankhuu]

Hi,

One of my friends are trying to setup pppoe server with mpd and they
want to give to set of users public IP dynamically and plus traffic
shaping.
However public IPs are limited compared to pppoe clients and they want
have some kind of dynamic NAT (dynamic public IP per number of
clients).
Is it possible to do that with mpd + pf binat in one box?

I was thinking about something like following:

pppoe clients -> mpd + pf binat + altq/ng_car server -> Internet

Any ideas and recommendations?

thanks,

Ganbold