Curt Sampson writes:
> I'm referring to the situation where you have never supplied an
> address to the interface.
> 
> If an interface already has an address, ifconfig'ing it up will
> maintain that address.
> 
> Thinking about it, though, your source address for bootp requests
> is supposed to be 0.0.0.0 anyway, right? So it makes sense to do
> the change the way Gordon requested it, have a different address
> (like 255.255.255.255) drop all packets on input, and have that
> address be the default until another is assigned.

I would very much like to be able to ifconfig an interface up WITHOUT
implying that I want the IP stack active AT ALL. I can then use BPF to
snoop or put out packets without fear.

Perry