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Re: Smurf Amps List

  • From: Jon Lewis
  • Date: Sat Jun 13 17:42:21 1998

On Sat, 13 Jun 1998, Jared Mauch wrote:

> On Sat, Jun 13, 1998 at 07:10:41AM -0400, D'Arcy J.M. Cain wrote:
> > Thus spake Jared Mauch
> > > 	The page can be found at
> > > http://puck.nether.net/~jared/smurfblocks.html
> > 
> > Why not list the netmask of the netblock as well?
> 
> 	In most cases you can figure out the netmasks.  These blocks
> were only checked at the very beginning of their space based on 
> the bgp announcement as viewed by our network.  You can look at
> our AS1225 feed at route-views.oregon-ix.net

Checking only the beginning of nets for which you receive BGP
announcements fails to take into account the vast numbers of single-homed
networks which are part of large supernets.  i.e. One of FDT's old UUNet
IP blocks was a /20 in 205.228.0.0/14.  There are only a few dozen
announcements for:  sh ip ro 205.228.0.0 255.252.0.0 longer

------------------------------------------------------------------
 Jon Lewis <jlewis@fdt.net>  |  Spammers will be winnuked or 
 Network Administrator       |  drawn and quartered...whichever
 Florida Digital Turnpike    |  is more convenient.
______http://inorganic5.fdt.net/~jlewis/pgp for PGP public key____





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