With the cloud-based model, Imperva can deal with DDoS attack traffic and keep it off the organization's infrastructure before it even reaches the network, the company said. Imperva guarantees protection for DDoS for attacks up to 4 Gbps even though most organizations tend to see attacks in the range of 10Mbps to 200Mbps, but attacks from LulzSec and other groups this past year has shown how easy it is for attackers to overwhelm corporate defenses, Rob Rachwald, director of security strategy at Imperva, told eWEEK. The cloud-based managed service can stop multi-gigabit attacks without requiring customers to invest in expensive hardware and bandwidth. There have been a significant increase in the number of DDoS attacks affecting Websites in the past year and the downtime has been costly for organizations according to Rachwild. "We scratched our heads and said, 'We gotta do something about this,'" Rachwald said.