North American Network Operators Group
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Re: smurf's attack...
- From: Michael K. Sanders
- Date: Fri Sep 05 16:35:58 1997
In message <199709051945.OAA26522@worf.netins.net>, Jon Green writes:
>On Fri, 5 Sep 1997 15:24:58 -0400, jordyn@bestweb.net writes:
>
>>access-list XXX deny ip any 0.0.0.255 255.255.255.0
>
>Folks, this is a bad idea. There are lots of completely valid IP
>addresses out there that end in .255. True, most of them that
>end in .255 ARE broadcast addresses, but if people implement this
>kind of filtering on a large scale, it really breaks classless IP.
Likewise, not all broadcast adresses necessarily end with .255,
so filtering .255 won't help anyway in the presence of something
like a /25 with a X.X.X.127 broadcast.
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