* November 1999-[[Shaft]] DDoS tool a packet flooding attack occurred with similarities to trinoo. It used TCP packets with sequence number 0x28374839 as signature.<ref>[http://www.garykessler.net/library/ddos.html Defenses Against Distributed Denial of Service Attacks]</ref> | * November 1999-[[Shaft]] DDoS tool a packet flooding attack occurred with similarities to trinoo. It used TCP packets with sequence number 0x28374839 as signature.<ref>[http://www.garykessler.net/library/ddos.html Defenses Against Distributed Denial of Service Attacks]</ref> |