In some email I received from Perry E. Metzger, sie wrote:
> 
> Ken Hornstein <kenh@cmf.nrl.navy.mil> writes:
> > FWIW, RFC 2228 is fairly well-known in the Kerberos community; I use a
> > RFC 2228 ftp client every day.  I'm not sure how widely it is used outside
> > of the Kerberos community, though (the implementations that I'm aware
> > of that do GSSAPI are only really set up to do Kerberos/GSSAPI ... but
> > there might be some DCE implementations out there that I'm not aware of).
> 
> I was very unaware of that -- maybe it is a point in favor of rolling
> in the implementation.

Well, FWIW, IPFilter's FTP proxy already supports RFC2228.

Darren