Possible BGP hijack

Beginning at 2021-11-27 23:48:04 UTC, we detected a possible BGP hijack.

Prefix 23.185.112.0/24, is normally announced by AS399890 OFL-61, US.

But beginning at 2021-11-27 23:48:04, the same prefix (23.185.112.0/24) was also announced by ASN 3257.

This was detected by 84 BGPMon peers.

Expected
Start time: 2021-11-27 23:48:04 UTC
Expected prefix: 23.185.112.0/24
Expected ASN: 399890 (OFL-61, US)
Event Details
Detected advertisement: 23.185.112.0/24
Detected Origin ASN 3257 (GTT-BACKBONE GTT, US)
Detected AS Path 4181 3257
Detected by number of BGPMon peers: 84

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