> 2) Enable IP/NAT on the NetBSD box so I can get out onto the
>    "temporary registration" network that DHCP returns.
>
>    DHCP does come up on sn0, but with a 10.x.x.x address and
>    a bogus route and nameservers that lead only to the registration
>    site.

If they (the ISP) use 10.x.x.x, you might consider using 192.168 or some
other different nonroutable network.

>    Maybe someone could offer a minimum NAT setup which could allow
>    me to try this? Do I need ipfilter and NAT? Configuration files
>    for both?

/etc/ipnat.conf:
map sn0 192.168.1.0/24 -> 0/32 proxy port ftp ftp/tcp
map sn0 192.168.1.0/24 -> 0/32 portmap tcp/udp 10000:65000
map sn0 192.168.1.0/24 -> 0/32

/etc/ipf.conf:
pass in from any to any
pass out from any to any

/etc/sysctl.conf:
net.inet.ip.forwarding=1

/etc/rc.conf (add these):
ipnat=YES
ipfilter=YES

How's that for simple?

John Klos
Sixgirls Computing Labs