Impressive, how does he collect all those information, must be a combination of active detection tools(nmap,etc) and http header analysis etc, and the fingerpri

Impressive, how does he collect all those information, must be a combination of active detection tools(nmap,etc) and http header analysis etc, and the fingerprint for all popular website software. I tried google.com and google is using dotcms and webbaker for its own CMSes, interesting!