news server recommends

[Kliment Andreev]

> > automatically fetch groups that are used; ignore groups that are not
accessed.
> > (this all to reduce bandwidth requirements!)
> > have script-configurable user accounts with arbitary monthly download
limits.
> > be secure enough to open a port through the firewall to it from the
Internet
>
> I would say try leafnode as this will do all you want as well as being
> open source.

DNews is very easy to configure and in 5 minutes you will have news server
up and running. INN is a hard to configure because of several dozens config
files and only a few tutorials on the Internet (mostly obsolete).
I am still using INN (at home) because DNews is a commercial product.