The Vigor 2930 is a dual-WAN router with policy-based load-balance, fail-over & Bo D (Bandwidth on Demand); it also features advanced bandwidth control mechanisms such as IP-layer Qo S, NAT session limitation, bandwidth borrowed, etc., to allow easy, flexible & reliable access control & bandwidth management. The SPI (Stateful Packet Inspection) firewall uses object-based design to make settings of firewall policies easy. The CSM (Content Security Management) feature endless more precise & efficient access control for IM (Instant Messenger) & P2P (Peer to Peer) applications. Furthermore, functions such as Dos / DDo S (Denial of Service / Distributed Dos) & URL / Web content filtering minimize security threats both inside & outside the network. With hardware-based implementation of the VPN protocols, the Vigor 2930 supports up to 100 VPN tunnels in compliance with advanced protocols such as IPSec / PPTP / L2TP / L2TP over IPSec with AES / DES / 3DES for encryption & MD5 / SHA-1 for authentication.