Thanks for the transparency, Vincent. Are you able to share how the AS-Path
became mangled to begin with? I’m assuming this was some kind of route
optimizer, but maybe something else going on?

On Mon, Oct 23, 2023 at 07:32 <vinc...@milkywan.fr> wrote:

> Hello everyone,
> I'm working for MilkyWan / AS2027 and I wanted to give you some
> explanations regarding this incident. Last week-end, during an upgrade
> on our network configuration, it appears that some prefixes were
> announced with an incorrect AS Path. Based on our analysis, none of
> these routes seem to have been announced anywhere, but to some
> route-collectors (RIPE RIS, BGP.Tools, Qrator, HE.net, NLNOG RING), and
> therefore didn't effectively end up in the DFZ.
> The issue was discovered quickly (in a few minutes) and corrected right
> away.
> The incident is now closed on our side; please reach out to us should
> you see anything proving otherwise.
>
> We deeply apologize for that and we can confirm it was not a BGP hijack
> attempt.
>
> Wishing you a very pleasant day.
>
> Vincent F. for Milkywan Team
>
> Le 2023-10-22 19:02, Olivier Benghozi a écrit :
> > Same stuff (with our ASN and our prefixes) detected here, coming from
> > AS2027 (Milkywan), for a short time...
> >
> > Le dim. 22 oct. 2023 à 17:18, Hank Nussbacher <h...@efes.iucc.ac.il>
> > a écrit :
> >
> >> We just had every single prefix in AS378 start being announced by
> >> AS2027.
> >>
> >> Every announcement by AS2027 is failing RPKI yet being propagated a
> >> bit.
> >> Is this yet another misbehaving device or an actual attack?
> >
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>

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