Netgear RT311 RT314 Reference Manual - Page 22

Automatic Configuration of Attached PCs by DHCP, DNS Proxy, PPP over Ethernet (PPPoE), Security

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Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Automatic Configuration of Attached PCs by DHCP The Model RT311 and RT314 routers dynamically assign network configuration information, including IP, gateway, and domain name server (DNS) addresses, to attached PCs on the LAN using the Dynamic Host Configuration Protocol (DHCP). This feature greatly simplifies configuration of LAN-attached PCs. DNS Proxy When DHCP is enabled and no DNS addresses are specified, the router provides its own address as a DNS server to the attached PCs. The router obtains actual DNS addresses from the ISP during connection setup and forwards DNS requests from the LAN. PPP over Ethernet (PPPoE) PPP over Ethernet is a protocol for connecting remote hosts to the Internet over an always-on connection by simulating a dial-up connection. Security The Model RT311 and RT314 routers are equipped with several features designed to maintain security, as described in this section. PCs Hidden by NAT Network address translation (NAT) opens a temporary path to the Internet for requests originating from the local network. Requests originating from outside the LAN are discarded, preventing users outside the LAN from finding and directly accessing the PCs on the LAN. Packet Filtering The Model RT311 and RT314 routers provide extensive packet filtering capabilities. Packets are allowed or discarded based on their source or destination addresses, service port numbers, or raw data patterns within the packet. Port-Address Translation The Model RT311 and RT314 routers perform port-address translation. Requests originating from outside the local network are allowed to reach particular local workstations based on the type of service requested. 1-4 Introduction

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Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers
1-4
Introduction
Automatic Configuration of Attached PCs by DHCP
The Model RT311 and RT314 routers dynamically assign network configuration information,
including IP, gateway, and domain name server (DNS) addresses, to attached PCs on the LAN
using the Dynamic Host Configuration Protocol (DHCP). This feature greatly simplifies
configuration of LAN-attached PCs.
DNS Proxy
When DHCP is enabled and no DNS addresses are specified, the router provides its own address
as a DNS server to the attached PCs. The router obtains actual DNS addresses from the ISP during
connection setup and forwards DNS requests from the LAN.
PPP over Ethernet (PPPoE)
PPP over Ethernet is a protocol for connecting remote hosts to the Internet over an always-on
connection by simulating a dial-up connection.
Security
The Model RT311 and RT314 routers are equipped with several features designed to maintain
security, as described in this section.
PCs Hidden by NAT
Network address translation (NAT) opens a temporary path to the Internet for requests originating
from the local network. Requests originating from outside the LAN are discarded, preventing users
outside the LAN from finding and directly accessing the PCs on the LAN.
Packet Filtering
The Model RT311 and RT314 routers provide extensive packet filtering capabilities. Packets are
allowed or discarded based on their source or destination addresses, service port numbers, or raw
data patterns within the packet.
Port-Address Translation
The Model RT311 and RT314 routers perform port-address translation. Requests originating from
outside the local network are allowed to reach particular local workstations based on the type of
service requested.