Though it fell to third place overall, Port 445 remained the top targeted port in seven of the top 10 countries and, in four of those countries, it was responsible for a significantly larger volume of attack traffic than the second most targeted port, ranging from 7x to 80x more. Ports 445, 3389 (Microsoft Terminal Services), 23 (Telnet), and 22 (SSH) also saw lower traffic percentages quarter-over-quarter. Pushed out of the top 10 in the first quarter, Port 8080 (HTTP Alternate) resurfaced on the list in the second quarter, though it saw a slight quarterly decline. In addition to the significant quarterly growth seen in the traffic percentages associated with these two ports, Ports 1433 (Microsoft SQL Server), 3306 (MySQL), and 6666 (IRCU) all saw quarter-over-quarter increases in traffic percentages. Increasing from 80% in the last quarter, 90% of the attacks targeting Ports 80 and 443 were observed to be originating in Indonesia in the second quarter. The increased concentration was again driven by significant increases in attack volume targeting Ports 80 (Other than in the inaugural 1st Quarter, 2008 State of the Internet Report, this is the first time that Port 445 has not held the top spot among the most targeted ports. As shown in Figure 2, the concentration of attack traffic among the top 10 targeted ports once again increased during the second quarter of 2013, with 82% of observed attacks targeting these ports.

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