pharming.. dns cache insertion...

[Brad Knowles]

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.

	Now, there is a complete list of valid IP address *ranges*.  Team 
Cymru maintains a "bogon list" that includes all IP address ranges 
that have not yet been assigned to a regional network facility such 
as ARIN or RIPE, and therefore the list of valid IP address ranges 
would be any range that's not on their bogon list.

-- 
Brad Knowles, <brad at stop.mail-abuse.org>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

   SAGE member since 1995.  See <http://www.sage.org/> for more info.