Nortel BSR222, Configuration, Page: 38 / 451

38 Chapter 1 Getting to know your Nortel Business Secure Router 222
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PPTP Encapsulation
Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables
secure transfer of data from a remote client to a private server, creating a Virtual
Private Network (VPN) using a TCP/IP-based network.
PPTP supports on-demand, multiprotocol, and virtual private networking over
public networks, such as the Internet. The Business Secure Router supports one
PPTP server connection at any given time.
Dynamic DNS support
With Dynamic DNS (Domain Name System) support, you can have a static host
name alias for a dynamic IP address, so the host is more easily accessible from
various locations on the Internet. You must register for this service with a
Dynamic DNS service provider.
IP Multicast
The Business Secure Router can use IP multicast to deliver IP packets to a specific
group of hosts. IGMP (Internet Group Management Protocol) is the protocol used
to support multicast groups. The Business Secure Router supports versions 1 and
2.
IP Alias
Using IP Alias, you can partition a physical network into logical networks over
the same Ethernet interface. The Business Secure Router supports three logical
LAN interfaces via its single physical Ethernet LAN interface with the Business
Secure Router itself as the gateway for each LAN network.
Central Network Management
With Central Network Management (CNM), an enterprise or service provider
network administrator can manage your Business Secure Router. The enterprise
or service provider network administrator can configure your Business Secure
Router, perform firmware upgrades, and do troubleshooting for you.