An anonymous reader writes "Convicted hacker Robert Moore, who will report to federal prison this week, gives his version of 'How I Did It' to InformationWeek. Breaking into 15 telecom companies and hundreds of corporations was so easy because most routers are configured with default passwords. "It's so easy a caveman can do it," Moore said. He scanned more than 6 million computers just between June and October of 2005, running 6 million scans on AT&T's network alone. 'You would not believe the number of routers that had "admin" or "Cisco0" as passwords on them,' Moore said. 'We could get full access to a Cisco box with enabled access so you can do whatever you want to the box. We also targeted Mera, a Web-based switch. It turns any computer basically into a switch so you could do the calls through it. We found the default password for it. We would take that and I'd write a scanner for Mera boxes and we'd run the password against it to try to log in, and basically we could get in almost every time. Then we'd have all sorts of information, basically the whole database, right at our fingertips.'"