[NLNOG] bgp filter guide bogon prefixes

Lannert, Julian julian.lannert at e-shelter.com
Tue Jun 25 10:41:42 CEST 2019

Hi All,

First I wanted to thank you for the great bgp filter guide you provide. It is awesome to see crucial information collected and published openly for everyone.

I am in the process of implementing more and better filters and while looking over the bogon prefixes v4 I stumbled upon the prefix .
You cite rfc7562 as a reference for adding this prefix to the bogon list and therefore not accepting this prefix but as far as I can see this the rfc clearly states "Networks SHOULD NOT filter out packets whose source address is" . 
If I do not accept a route to I effectively blackhole that network to my customers and block returning packets to from my and my customers networks.
I checked other bogon lists that I could find, like team-cymru or kees (https://github.com/coloclue/kees/blob/e353ca9a06bca19147dcc6f607290cfd593033f3/vars_example/generic.yml), who do not include in their bogon prefix list.

Can you tell me the reasoning behind the decision to include this prefix in your bogon list?

Best Regards

 Julian Lannert
Network Engineer

e-shelter services GmbH
Eschborner Landstraße 100
60489 Frankfurt am Main

T: +49 69 7801-2422
F: +49 69 7801-2139

julian.lannert at e-shelter.com


Ingmar Dilßner
Volker Ludwig
Rupprecht Rittweger
Florian Winkler

Sitz der Gesellschaft:
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