"intitle:Cisco Systems, Inc. VPN 3000 Concentrator"
The Cisco VPN 3000 Concentrator is a remote access VPN. The 'Concentrator' is a piece of hardware that manages a companies VPN's. This google dork searches for the Concentrators login portal for remote access. With the correct username and password an attacker can '0wn' their Concentrator; i.e. be able to delete, copy, read, configure anything on the Concentrator.