pharming.. dns cache insertion...

[Barry Margolin]

In article <d37dso$2ev4$1 at sf1.isc.org>,
 Brad Knowles <brad at stop.mail-abuse.org> wrote:

> At 2:02 PM -0700 2005-04-08, bruce wrote:
> 
> >  i got to thinking about this after your 1st email... my basic question was,
> >  is there a list/compilation of valid IP addresses, taking into account that
> >  the list is completely dynamic.. has anyone tried to compile such a list?
> >  how the hell would you even do it?
> 
> 	With regards to individual IP addresses, that's not possible. 
> Among other things, a given IP address range may be validly assigned 
> to someone, but they may allocate IP addresses out of that range on a 
> dynamic basis to their clients.  Assuming their range is not 
> completely full, there will always be some addresses which are not 
> currently assigned -- but you never know which ones.