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Re: SMURF amplifier block list
From: "Jay R. Ashworth" <jra () scfn thpl lib fl us>
Date: Sun, 19 Apr 1998 20:39:41 -0400

On Sat, Apr 18, 1998 at 12:39:29PM -0500, Dan Boehlke wrote:
On Sat, 18 Apr 1998, Alex P. Rudnev wrote:
Why don't use the filter
 deny icmp any echo-request
on the incoming lines? It just block 99.999% of this smurf amplifiers; 
and I hardly think someone eve sence this restriction for the real PING 
What about people who didn't subnet their class B on the eight bit 
boundry, but made larger subnets instead?  What about the class B that 
doesn't appear to be subnetted at all?  What about supernetted class C 
networks?  A trailing .255 can be a valid host.

Yes, Dan, but any potential smurf-_amplifier_ who might need to do this
_knows_ this about _their own network_, and can adjust accordingly.

-- jra

Jay R. Ashworth                                                jra () baylink com
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