ASN "Hijacked"

[Matt Brennan via NANOG <nanog () lists nanog org>]

Hi Folks,

  This is a new one for me. One of my AS numbers (AS27421) appears to be
being used by someone in Brazil. We haven't seen any actual effects of the
hijack -- that is, we don't appear to be losing any traffic. The only
reason we noticed is because it's being reported on HE's BGP monitoring
site.

  I've reached out to the abuse contact for the AS's the hijacker is
peering with (AS1000, AS271253 - same abuse contact for both) several times
and gotten no response. Though, looking at which prefixes AS271253 is
originating, it doesn't appear this AS cares much about proper behavior.

  If anyone has any advice on next steps, it would be appreciated.

Thanks,
Matt
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