Re: identify hostname

["Roeland M.J. Meyer" <rmeyer () mhsc com>]

At 11:32 AM 12/2/98 -0700, Pete Kruckenberg wrote:
> > I do have an access list deny for incoming destinations to *.*.*.255
> > since I do know that the only customer we have with larger than a /24
> > from us (via cw.net) also happens to have nothing larger than /26 in
> > their network.  AFAIK, today, smurfers are only using *.*.*.255.  They
> > would have to track a lot more information to use others, so for now I
> > can generally expect that deny to prevent us from being an amplifier. 
>
> It's not difficult to find subnet broadcast addresses, since few routers
> (if they even support it) are configured to filter ICMP replies. If there
> isn't already software out there, it will take all of a few hours to add
> broadcast-finding code to the smurfing software in existence.

Guys,

Why not make your down-stream fill out a *complete* IN-ADDR.ARPA file which
lists their sub-net bcast and base addresses? That way yo could use the DNS
system itself to find those addresses.
___________________________________________________ 
Roeland M.J. Meyer, ISOC (InterNIC RM993) 
e-mail: <mailto:rmeyer () mhsc com>rmeyer () mhsc com
Internet phone: hawk.mhsc.com
Personal web pages: staff<http://www.mhsc.com/~rmeyer>.mhsc.com/~rmeyer
Company web-site: <http://www.mhsc.com/>www.mhsc.com
___________________________________________________ 
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