Mac Address Proxy; Mtu Settings - NETGEAR FR314 Reference Manual

Reference Guide for the Model FR314, FR318 and FV318 Cable/DSL Firewall and VPN Routers
DNS Servers, or Domain Name Servers, resolve descriptive names of network resources (such as
www.NETGEAR.com) to numeric IP addresses. One or more DNS Server addresses should be
assigned by your ISP for your use. DNS Server addresses are assigned automatically when
Dynamic Addressing or PPPoE is selected as your addressing mode. These DNS addresses are
used by the firewall router to locate and access the Content Filter List server and for the built-in
DNS lookup tool.
Note: The firewall router will not automatically relay these DNS settings to the LAN. You must
enable and configure the firewall router's DHCP server or manually configure your computers'
DNS settings to obtain DNS name resolution.

MAC Address Proxy

Some ISPs, particularly cable providers, allow a customer to access the Internet from only one
specific PC, which is identified by that PC's unique Ethernet MAC (Media Access Control)
address. In this case, you can have your firewall router obtain and use ("proxy" or "spoof") that
MAC address from your PC.
To have the firewall router proxy your PC's MAC address, first you must use that PC to access the
Network Settings menu. If you are currently configuring the router from a different PC, log off and
log in from the desired PC.
In the MAC Address Proxy menu section, check the box titled "Use this PC's MAC Address on
the WAN Port." Then click Update.

MTU Settings

The MTU (Maximum Transmit Unit) is the largest size packet, including all headers and data, that
can be transmitted over a given network. You can set the MTU size in the MTU Settings menu
section of the Network Settings menu. To set the MTU size, check the box titled "Fragment
outbound packets larger than WAN MTU", enter a new MTU value in the WAN MTU box, then
click Update.
Ethernet networks typically use an MTU of 1500 bytes, but some ISPs, particularly DSL
providers, add additional bytes to each packet resulting in a packet size of greater than 1500.
(These extra bytes typically result from the use of a name-and-password login client such as
EnterNet or WinPOET). A downstream router receiving these larger packets may send back an
ICMP message asking your router to use a smaller packet size. Since this type of request can be
used as a type of DoS attack, your router will discard the request, possibly resulting in a slower or
lost connection.
5-6 General Configuration