Possible BGP hijack

Beginning at 2021-09-25 19:01:12 UTC, we detected a possible BGP hijack.

Prefix 37.153.157.0/24, is normally announced by AS137409 GSLNETWORKS-AS-AP GSL Networks Pty LTD, AU.

But beginning at 2021-09-25 19:01:12, the same prefix (37.153.157.0/24) was also announced by ASN 20473.

This was detected by 18 BGPMon peers.

Expected
Start time: 2021-09-25 19:01:12 UTC
Expected prefix: 37.153.157.0/24
Expected ASN: 137409 (GSLNETWORKS-AS-AP GSL Networks Pty LTD, AU)
Event Details
Detected advertisement: 37.153.157.0/24
Detected Origin ASN 20473 (AS-CHOOPA, US)
Detected AS Path 53070 4230 3356 2914 20473
Detected by number of BGPMon peers: 18

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