The document details the largest DDoS attacks mitigated in 2013, categorized by each quarter. Notable attacks included peak bandwidths of up to 144 million packets-per-second and lasted between 5.4 hours to 14.6 days, primarily targeting the finance and media industries. Attack vectors included UDP, SYN, and DNS floods among others.

1. Largest 2013 DDoS Attacks
Mitigated by Quarter
Q1 2013
Q2 2013
Start Date: 03/06/13
Start Date: 04/04/13
Peak Attack Bandwidth: 130 Gbps
Peak Attack Bandwidth:
144 million packets-per-second
Industry Vertical:
Finance, Banking, Insurance
Industry Vertical:
Finance, Banking, Insurance
Attack Duration: 14.6 days
Attack Vectors Used:
UDP, SYN and DNS floods
Q3 2013
Attack Duration: 17.5 hours
Attack Vectors Used:
UDP and SYN floods
Q4 2013
Start Date: 09/06/13
Start Date: 12/13/13
Peak Attack Bandwidth: 111 Gbps
Peak Attack Bandwidth: 179 Gbps
Industry Vertical:
Media & Entertainment
Industry Vertical:
Media & Entertainment
Attack Duration: 20.6 hours
Attack Duration: 5.4 hours
Attack Vectors Used:
DNS, UDP, UDP Fragment, GET
and SYN floods, CHARGEN
Attack Vectors Used:
UDP and SYN floods
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