North American Network Operators Group

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Re: Router modifications to deal with smurf

  • From: Jay R. Ashworth
  • Date: Mon Apr 27 18:31:12 1998

On Sun, Apr 26, 1998 at 05:59:42PM -0400, John Hawkinson wrote:
> >         We request that your routers be configurable, both globally and
> > and the interface level, with the interface configuration overiding the
> > global configuration, to prevent the forwarding of an IP packet with a
> > source network address different from the network address of the interface
> > on which it was received.  We also request that the default configurations
> > of your routers be modified to prevent, globally, said forwarding. 
> I'd be concerned that having this as a default is not necessarily
> the right thing in sufficiently large numbers of situations as to
> make this a bad idea.

I know we've collectively been here before, but is it not a reasonable
assumption that people whose routing patterns might be assymetrical enough
to break this as a default should be expected to be bright enough to switch
it off?

-- jra
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