> What do I do if the nat box's outgoing (dial-up to the Internet)
> interface IP address is dynamic and so not known at the time I setup
> the nat rules?

Run 'natd' ?

> I can not use pppd's ip-up and ip-down scripts, since isdn4bsd does
> not use the pppd, but a proprietary isdnd.

It will include similar scripts realy soon. Have you tried using the
regex prog's in the config file? They should be able to do something
similar (although they might run to early, when the ISDN link is up
and ipcp is not yet negotiated).


Martin