Novell apparently allowed employees to use test servers outside the firewall for gaming, leaving them vulnerable to attack. One hacked server was used to scan potentially millions of computers. The scans used Port 22, the default port for Secure Shell (SSH) services, which allows programs to log into other computers or to execute remote commands and move files securely. Port 22 scans often indicate hackers are looking for vulnerable SSH to break into and control. The gaming site, neticus.com, was taken down after Novell was alerted about the breach.