Scanning every ip is relatively easy, as long as you stick to ipv4. It was done a number of years ago by some grey/black hats. See: http://census2012.sourceforg

Scanning every ip is relatively easy, as long as you stick to ipv4. It was done a number of years ago by some grey/black hats. See: http://census2012.sourceforge.net/paper.html http://census2012.sourceforge.net/paper.html And yeah, the explanation of memcache as a type of DDoS is laughable, but it sounds like it was just used for amplification like I think DNS and NTP have been in the past.