Where are static bogon filters appropriate? was: Bogons

Jon Lewis jlewis at lewis.org
Thu Mar 1 19:39:21 UTC 2007

On Thu, 1 Mar 2007, Chris L. Morrow wrote:

> ah-ha! but seriously, is this something an NSP/ISP should be doing? or is
> this an enterprise function? or MSSP function? Are there standard tools
> available to notify folks when changes occur? (aside from: "go check
> iana.org website" or "golly traffic's not flowing anymore")

Such updates get posted to various places like nanog, cisco-nsp, probably 
other -nsp lists, and such...but for the large number of ASNs not 
represented at all on those lists, I don't know how they're supposed to 
"get notified" every time a bogon ceases to be.  My own experience with 
this was that its very diffifcult to find your way to the clue at 
organizations with such filter issues...and even when you find such 
breakage, its hard to tell from the outside which end of a connection has 
the filter issue.

  Jon Lewis                   |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
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