Possible BGP hijack

Beginning at 2018-12-01 13:01:49 UTC, we detected a possible BGP hijack.

Prefix 91.209.157.0/24, is normally announced by AS2 University of Delaware.

But beginning at 2018-12-01 13:01:49, the same prefix (91.209.157.0/24) was also announced by ASN 6.

This was detected by 20 BGPMon peers.

Expected
Start time: 2018-12-01 13:01:49 UTC
Expected prefix: 91.209.157.0/24
Expected ASN: 2 (University of Delaware)
Event Details
Detected advertisement: 91.209.157.0/24
Detected Origin ASN 6 (Bull HN Information Systems Inc.)
Detected AS Path 22268 6939 3326 48420 6
Detected by number of BGPMon peers: 20

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