your ISP connection. For more information about changing the MTU size, see

Change the MTU Size

on page

41.

6.

Select an IPv6 Domain Name Server (DNS) Address radio button:

•

Get Automatically from ISP

.Your ISP uses DHCP to assign your DNS servers.Your ISP automatically

assigns this address.

•

Use These DNS Servers

. If you know that your ISP requires specific servers, select this option. Enter the

IP address of your ISP’s primary DNS server. If a secondary DNS server address is available, enter it also.

7.

Select an IP Address Assignment radio button:

•

Use DHCP Server

. This method passes more information to LAN devices but some IPv6 systems might not

support the DHCPv6 client function.

•

Auto Config

. This is the default setting.

This setting specifies how the router assigns IPv6 addresses to the devices on your home network (the LAN).

8.

(Optional) Select the

Use This Interface ID

check box and specify the interface ID that you want to be used for

the IPv6 address of the router’s LAN interface.

If you do not specify an ID here, the router generates one automatically from its MAC address.

9.

Click the

Apply

button.

Your settings are saved.

Change the MTU Size

The maximum transmission unit (MTU) is the largest data packet a network device transmits. When one network

device communicates across the Internet with another, the data packets travel through many devices along the way.

If a device in the data path uses a lower MTU setting than the other devices, the data packets must be split or

“fragmented” to accommodate the device with the smallest MTU.

The best MTU setting for NETGEAR equipment is often the default value. In some situations, changing the value

fixes one problem but causes another. Leave the MTU unchanged unless one of these situations occurs:

•

You experience problems connecting to your ISP or other Internet service, and the technical support of either

the ISP or NETGEAR recommends changing the MTU setting. These web-based applications might require an

MTU change:

•

A secure website that does not open, or displays only part of a web page

•

Yahoo email

Specify Your Internet Settings

41

•

MSN portal

•

America Online’s DSL service

•

You use VPN and experience severe performance problems.

•

You used a program to optimize MTU for performance reasons and now you are experiencing connectivity or

performance problems.

An incorrect MTU setting can cause Internet communication problems. For example, you

might not be able to access certain websites, frames within websites, secure login pages, or

FTP or POP servers.

Note

To change the MTU size:

1.

Launch a web browser from a computer or wireless device that is connected to the network.

2.

Enter

.

A login window opens.

3.

Enter the router user name and password.

The user name is

admin

.The default password is

password

.The user name and password are case-sensitive.

The BASIC Home page displays.

4.

Select

ADVANCED > Setup > WAN Setup

.

The WAN Setup page displays.

5.

In the

MTU Size

field, enter a value from 64 to 1500.

6.

Click the

Apply

button.

Your settings are saved.

If you suspect an MTU problem, a common solution is to change the MTU to 1400. If you are willing to experiment, you

can gradually reduce the MTU from the maximum value of 1500 until the problem goes away. The following table

describes common MTU sizes and applications.

Table 3. Common MTU sizes

Application

MTU

The largest Ethernet packet size.This setting is typical for connections that do not use PPPoE or VPN

and is the default value for NETGEAR routers, adapters, and switches.

1500

Used in PPPoE environments.

1492

Specify Your Internet Settings

42

Application

MTU

Maximum size to use for pinging. (Larger packets are fragmented.)

1472

Used in some DHCP environments.

1468

Usable by AOL if you do not send or receive large email attachments, for example.

1460

Used in PPTP environments or with VPN.

1436

Maximum size for AOL DSL.

1400

Typical value to connect to dial-up ISPs.

576

Specify Your Internet Settings

43

4

Control Access to the Internet

The router comes with a built-in firewall that helps protect your home network from unwanted intrusions from the Internet.

This chapter includes the following sections:

•

Set Up Parental Controls

on page 45

•

Allow or Block Access to Your Network

on page 46

•

Use Keywords to Block Internet Sites

on page 48

•

Manage Network Access Control Lists

on page 53

•

Schedule When to Block Internet Sites and Services

on page 54

•

Set Up Security Event Email Notifications

on page 55

44

Set Up Parental Controls

The first time that you select

Parental Controls

from the BASIC Home page, your browser goes to the Live Parental

Controls website, where you can learn more about Parental Controls and download the application.

After you set up and enable parental controls, you can change the web filtering level for each device on the network

through the network map page on the genie app.

To set up Parental Controls:

1.

Launch a web browser from a computer or wireless device that is connected to the network.

2.

Enter

.

A login window opens.

3.

Enter the router user name and password.

The user name is

admin

.The default password is

password

.The user name and password are case-sensitive.

The BASIC Home page displays.

4.

Select

Parental Controls

.

The Live Parental Controls website opens.

5.

Click the button for the app or version that you want to download and use.

6.

Follow the onscreen instructions to download and install the genie app.

7.

Open the genie app and select

Parental Controls

.

After installation, Live Parental Controls automatically starts.

8.

Click the

Next

button, read the note, and click the

Next

button again.

Because Live Parental Controls uses free OpenDNS accounts, you are prompted to log in or create a free

account.

9.

Select a radio button as follows:

•

If you already own an OpenDNS account, leave the

Yes

radio button selected.

•

If you do not own an OpenDNS account, select the

No

radio button.

If you are creating an account, the Create a free OpenDNS account page displays. Do the following:

Control Access to the Internet

45