Is it time to abandon bogon prefix filters?

Steven M. Bellovin smb at
Fri Aug 15 11:17:36 CDT 2008

On Fri, 15 Aug 2008 08:56:27 -0700
Randy Bush <randy at> wrote:

> > Not sure what you mean by this, but the painful reality is that most
> > stuff, once deployed, gets promptly forgotten about, much the same
> > as you might ignore a wall wart power supply under your desk until
> > it started smelling funny or stopped delivering electricity.  Thus,
> > I contend that one's routers should be configured to avoid ticking
> > time bombs.
> and i am saying that you should use a router configuration *system*
> that avoids ticking time bombs.  no router should be neglected and
> unloved.
That, I think, is why he distinguished between routers run by "highly
clueful people" and routers run by others.  I think we all agree on
your basic point; it's just that too many people aren't clueful enough
to realize that they even have a problem, let alone know how to solve
it.  (Of course, you and I both have a background in programming
languages and compilers, which is why we naturally think of router
configurations as a form of assembler language that only a compiler
should every emit.)

		--Steve Bellovin,

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