Is it time to abandon bogon prefix filters?

Laurence F. Sheldon, Jr. LarrySheldon at
Wed Aug 6 10:46:35 CDT 2008

Leo Bicknell wrote:

> Have bogon filters outlived their use?  Is it time to recommend people
> go to a simpler bogon filter (e.g. no 1918, Class D, Class E) that
> doesn't need to be updated as frequently?

Seems like filtering against those could be done on the backplane, so to 

One of the things that has always puzzled me is this:

In the default-free zone, why is necessary to filter _against_ anybody? 
  Seems like traffic for which there is no route would at most be dumped 
to an error-log someplace.

For folks with a default route, I have long advocated (with no success 
what ever) filtering against stuff like the above, your own networks as 
sourced somewhere else, such.

I also think a central blacklist a la spamhaus for networks makes sense.
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