On Tue, Aug 30, 2022 at 10:17 AM James Shank <jshank@cymru.com> wrote:
Dear NANOG!
As many of you know, Team Cymru runs a free service delivering updated BOGONS to networks around the world. We've been doing this for decades at this point. For more information about this service, please see https://www.team-cymru.com/bogon.
Recently, we've discussed internally a discrepancy between our BGP based feed and the other formats we deliver for our Traditional BOGONS feed. For historic reasons, we previously omitted delivery of some ranges that are BOGONS from our BGP advertisements. We are considering adding the below ranges back in, but want to hear feedback from the community on these ranges prior to advertising them, out of an abundance of caution.
The below ranges are what we are currently considering advertising: 0/8 (this one we already have concluded is safe as it is already advertised in our "FULL BOGONS" set.) 127/8 224/4 240/4
Note that 224/4 and 240/4 may be aggregated differently in our advertisement, but are broken out here to facilitate discussion.
I would like to make an effort to debogon 240/4 at least, or have an authorized experiment to at least determine how fully bogon'd it is. Some recent data about amazon and verizon: https://labs.ripe.net/author/qasim-lone/2404-as-seen-by-ripe-atlas/ One question for me is how many folks rely on regular bogon updates such as yours. There are others.
So, fellow NANOGers, what say ye? I would love to hear your feedback, pro or con, well-reasoned with data points or general "argh! there be dragons!" sentiments.
Looking forward to seeing folks in Hollywood for N86!
Cheers!
James
-- *James Shank* Chief Architect of Community Services and Sr. Security Evangelist e: jshank@cymru.com o: +1 847 378-3365
-- FQ World Domination pending: https://blog.cerowrt.org/post/state_of_fq_codel/ Dave Täht CEO, TekLibre, LLC