SMC Networks SMC Barricade Plus SMCBR18VPN - Manual (Page 71)

to the Internet with a single user account, or to map the local address for an IP server (such as
Web or FTP) to a public address. This secures your network from direct attack by hackers, and
provides more flexible management by allowing you to change internal IP addresses without
affecting outside access to your network. NAT must be enabled to provide multi-user access to
the Internet or to use the Virtual Server function.
Packet Binary Convulational Code(tm) (PBCC) - A modulation technique developed by Texas
Instruments Inc. (TI) that offers data rates of up to 22Mbit/s and is fully backward compatible
with existing 802.11b wireless networks.
PAP - This is a simple authentication protocol where the username and password data are both
handled in a cleartext or unencrypted format. We do not recommend using PAP because your
passwords are easily readable from the Point-to-Point Protocol (PPP) packets exchanged during
the authentication process.
PCI - Peripheral Component Interconnect - Local bus for PCs from Intel that provides a high-
speed data path between the CPU and up to 10 peripherals (video, disk, network, etc.). The PCI
bus runs at 33MHz, supports 32-bit and 64-bit data paths, and bus mastering.
PPPoE - Point-to-Point Protocol over Ethernet. Point-to-Point Protocol is a method of secure data
transmission originally created for dial-up connections. PPPoE is for Ethernet connections.
PPTP - PPTP stands for Point-to-Point Tunneling Protocol. It provides a means for tunneling IP
traffic in Layer 2. For instance, it allows you to establish a connection to a corporate network and
share files or other data as if your machine were actually on that local network.
Roaming - A function that allows your to move through a particular domain without losing
network connectivity.
SNMP - Format used for network management data. Data is passed between SNMP agents
(processes that monitor activity in hubs, switches, etc.) and the workstation used to oversee the
network. SNMP uses Management Information Bases (MIBs), which are databases that define
what information is obtainable from a networked device and what can be controlled (turned off,
on, etc.).
Static IP - If your Service Provider has assigned a fixed IP address; enter the assigned IP
address, subnet mask and the gateway address provided by your service provider.
SPI - Stateful Packet Inspection ensures that the data coming into your network was requested
by an end node computer on your LAN. The Barricade examines the incoming data and compares
it to a database of trusted information. As traffic leaves the network it is defined by certain
characteristics. Incoming information is then compared to these sets of characteristics. If the
incoming data matches the predefined set of characteristics the incoming traffic is allowed. If no
match is found the incoming traffic is discarded.
Subnet Mask - A subnet mask, which may be a part of the TCP/IP information provided by your
ISP, is a set of four numbers configured like an IP address. It is used to create IP address
numbers used only within a particular network (as opposed to valid IP address numbers
recognized by the Internet.
TCP/IP - Transmission Control Protocol/Internet Protocol. This is the standard protocol for data
transmission over the Internet.