Still, the DDoS attacks launched against Spamhaus suggest that with a bit of effort, attack volumes -- which on average have remained stagnant in recent years, or even decreased -- can be increased in size. "Arbor has been monitoring DDoS for more than a dozen years and we've seen attack size peaking at around 100 Gbps in recent years," said Dan Holden, director of Arbor Network's security engineering and response team, in an email.
But DDoS attack size need not matter, because DDoS attackers -- supported by free attack toolkits -- have found effective ways to disrupt websites that don't require launching massive quantities of packets. Instead, they can simply target choke points, for example by launching application-layer attacks.
6. At Whatever Volume, DDoS Attacks Are Hard To Stop.
The end result, of course, is still website disruptions. "The attack on Spamhaus, and their upstream security and Internet providers, is yet another example of how DDoS has become the de facto weapon of choice for cyber-activists, cyber-criminals, business competitors and others," said Marty Meyer, president of Corero Network Security, in an email. "Unfortunately, the shared infrastructure that is the Internet can be vulnerable to this type of attack on the DNS system. It illustrates the collateral damage that can be felt by individuals trying to access sites and businesses like Netflix" -- which reportedly saw its service slow down as a result of the Spamhaus DDoS attacks -- "for whom the Web is the cornerstone of their business," he said.
The DDoS attack against Spamhaus also brought predictable dystopian hand-wringing from security vendors envisioning the potential evolution in online threats. "It also raises a worrying red flag that if an organization like CyberBunker could allegedly unleash this much damage, could a cyber-terrorist or state sponsored attacker use similar tactics to disrupt the communication and business channels of its enemies that rely on the Internet?" said Meyer.
7. Easy DDoS Attacks Support Online Grudges.
Case in point: the group calling itself the al-Qassam Cyber Fighters, which has been waging six-month-long DDoS attack campaign against U.S. banking websites under the banner of "Operation Ababil." Although the group claims to be a cross-border band of Muslim hacktivists incensed over the July 2012 posting to YouTube of a film that mocks the founder of Islam, multiple U.S. government officials have accused it of being an Iranian government front.
Regardless, the group continues to prove itself adept at preventing customers from reaching U.S. banking websites, either by disrupting targeted websites, or leading targeted websites to employ defenses that block some legitimate traffic from reaching their sites. No 300-Gbps attack volume required.
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