Prolexic, a provider of security consulting products, has claimed that Deutsche Telecom, Wanadoo and AOL are Europe"s top three internet providers for harboring infected PCs
The primary attack of choice in the begginning of 2005 was an advanced full connection based flood. This attack exposes the real IP address of the attacking zombie, however, due to the sheer number of IP addresses that must be blacklisted to successfully defend against the attack places an overwhelming load on protection hardware.
The findings were based on statistics taken from real DDoS attacks over the last six months. Globally, AOL was found to be the most infected service provider on the Internet.