Overall, the concentration of attacks declined during the third quarter of 2013, with the top 10 countries originating 83 percent of observed attacks, compared to 89 percent in the second quarter. China and Indonesia, however, continued to originate more than half of all observed attack traffic.

After dropping to third place in the second quarter, Port 445 (Microsoft-DS) returned to its spot as the most targeted port in the third quarter, drawing 23 percent of observed attacks. Port 80 (WWW [HTTP]) and Port 443 (SSL [HTTPS]) dropped to second and third place at 14 and 13 percent, respectively. Port 445 was the most targeted port in eight of the top 10 countries/regions, the only exceptions being China and Indonesia. Port 1433 (Microsoft SQL Server) was the top target for China, and Port 443 was the most targeted from Indonesia.

In addition to observations on attack traffic, the State of the Internet Report includes insight into distributed denial of service (DDoS) attacks based on reports from Akamai customers. For the first time since the fourth quarter of 2012, when Akamai began reporting on DDoS attacks, fewer attacks were reported than the previous quarter, with 281 observed in the third quarter of 2013 compared to 318 during the second quarter (down 11 percent). Overall, Akamai saw more attacks through the third quarter of 2013 (807) than it did in all of 2012 (768).
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