Possible BGP hijack

Beginning at 2023-07-06 18:44:58 UTC, we detected a possible BGP hijack.

Prefix 199.253.251.0/24, is normally announced by AS55195 CIRA-CLOUD1, CA.

But beginning at 2023-07-06 18:44:58, the same prefix (199.253.251.0/24) was also announced by ASN 3257.

This was detected by 9 BGPMon peers.

Expected
Start time: 2023-07-06 18:44:58 UTC
Expected prefix: 199.253.251.0/24
Expected ASN: 55195 (CIRA-CLOUD1, CA)
Event Details
Detected advertisement: 199.253.251.0/24
Detected Origin ASN 3257 (GTT-BACKBONE GTT, US)
Detected AS Path 48659 3257
Detected by number of BGPMon peers: 9

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