[GTER] Novo caso de anúncios AS-PATH incorretos

MARLON BORBA MBORBA at trf3.jus.br
Tue Feb 17 17:32:05 -03 2009


"The Details

SuproNet (AS 47868) normally announces a single prefix,, to a single provider, CD-Telematika (AS 25512). On
February 16th at 16:23:30 UTC, we saw this same prefix via a different
provider, Sloane Park Property Trust (AS 29113), but with an AS path
exceeding 255 ASNs. Such messages continued for almost exactly one hour
or until 17:23:00 UTC. We observed Level 3 (AS 3356), Tiscali (AS 3257)
and TeliaSonera (AS 1299) propagating most of these routes globally,
with a total of 230 unique ASes ultimately sending us the problematic

255 ASNs!?



Marlon Borba, CISSP, APC DataCenter Associate
Técnico Judiciário · Segurança da Informação
IPv6 Evangelist · MoReq-Jus Evangelist
TRF 3 Região
(11) 3012-1683
Practically no IT system is risk free.
(NIST Special Publication 800-30)

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