Built-in Firewall to increase system security VPN (Virtual Private Network) with IPSec encryption DHCP server facility for your network Easy configuration and monitoring from your web browser 4-port 10/100BaseTX NAT This is an ideal broadband router for users of USB ADSL Modem Special application VoIP Pass-through With the DMZ function, Vigor2200 series DSL/Cable Router enable to forward an incoming/ outgoing packet of VoIP gateway through a particular port to a specified local computer.