Possible BGP hijack

Beginning at 2023-05-18 18:09:06 UTC, we detected a possible BGP hijack.

Prefix 2001:250:219::/48, is normally announced by AS24348 CNGI-BJ-IX2-AS-AP CERNET2 IX at Tsinghua University, CN.

But beginning at 2023-05-18 18:09:06, the same prefix (2001:250:219::/48) was also announced by ASN 268238.

This was detected by 3 BGPMon peers.

Start time: 2023-05-18 18:09:06 UTC
Expected prefix: 2001:250:219::/48
Expected ASN: 24348 (CNGI-BJ-IX2-AS-AP CERNET2 IX at Tsinghua University, CN)
Event Details
Detected advertisement: 2001:250:219::/48
Detected Origin ASN 268238 (Clicknet Telecom. Provedor de Internet LTDA, BR)
Detected AS Path 34019 35280 53102 53102 268238
Detected by number of BGPMon peers: 3

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