Possible BGP hijack

Beginning at 2023-08-29 00:43:22 UTC, we detected a possible BGP hijack.

Prefix 2001:df0:456::/48, is normally announced by AS55904 KOGAKUIN-AS KOGAKUIN University, JP.

But beginning at 2023-08-29 00:43:22, the same prefix (2001:df0:456::/48) was also announced by ASN 266970.

This was detected by 2 BGPMon peers.

Start time: 2023-08-29 00:43:22 UTC
Expected prefix: 2001:df0:456::/48
Expected ASN: 55904 (KOGAKUIN-AS KOGAKUIN University, JP)
Event Details
Detected advertisement: 2001:df0:456::/48
Detected Origin ASN 266970 ()
Detected AS Path 202365 50673 33891 3356 4230 61678 266970
Detected by number of BGPMon peers: 2

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