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Page 31 / 123 Scroll up to view Page 26 - 30
Internet Setup
31
Dual Band Wireless VDSL2 + Ethernet Gateway
9.
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 DHCv6 client function.
•
Auto Config
. This is the default setting.
This setting specifies how the gateway assigns IPv6 addresses to the devices on your
home network (the LAN).
10.
(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 gateway’s LAN interface.
If you do not specify an ID here, the gateway generates one automatically from its MAC
address.
11.
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 has 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
-
MSN portal
-
America Online’s DSL service
•
You use VPN and are experiencing severe performance problems.
•
You used a program to optimize MTU for performance reasons, and now you are
experiencing connectivity or performance problems.
Note:
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.
Page 32 / 123
Internet Setup
32
Dual Band Wireless VDSL2 + Ethernet Gateway
To change the MTU size:
1.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
2.
Type
or
.
A login screen displays.
3.
Enter the gateway 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 screen displays.
4.
Select
Advanced > Setup > WAN Setup
.
5.
In the
MTU Size
field, enter a value from 64 to 1500.
6.
Click the
Apply
button.
Your change is 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 2.
Common MTU sizes
MTU
Application
1500
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 gateways, adapters, and switches.
1492
Used in PPPoE environments.
1472
Maximum size to use for pinging. (Larger packets are fragmented.)
Page 33 / 123
Internet Setup
33
Dual Band Wireless VDSL2 + Ethernet Gateway
1468
Used in some DHCP environments.
1460
Usable by AOL if you do not send or receive large email attachments, for example.
1436
Used in PPTP environments or with VPN.
1400
Maximum size for AOL DSL.
576
Typical value to connect to dial-up ISPs.
Table 2.
Common MTU sizes
(continued)
MTU
Application
Page 34 / 123
34
4
4.
Control Internet Access
This chapter explains how to prevent objectionable content from reaching the computers and
other devices that are connected to your network. It also explains how to customize firewall rules
to specify exceptions to how network traffic to and from the Internet is handled.
This chapter includes the following sections:
•
Use Keywords to Block Internet Sites
•
Schedule When to Block Internet Sites
•
Avoid Blocking on a Trusted Computer
•
Set Up Security Event Email Notifications
•
Outbound Firewall Rules
•
Set Up Port Forwarding to a Local Server
•
Port Triggering
Page 35 / 123
Control Internet Access
35
Dual Band Wireless VDSL2 + Ethernet Gateway
Use Keywords to Block Internet Sites
You can use keywords to block certain Internet sites from your network. You can use blocking
all the time or based on a schedule.
To block Internet sites:
1.
Launch a web browser from a computer or wireless device that is connected to the
network.
2.
Type
http://routerlogin.net
or
www.routerlogin.com
.
A login screen displays.
3.
Enter the gateway 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 screen displays.
4.
Select
Advanced > Security >
Block Sites
.
5.
Select a keyword blocking option:
•
Per Schedule
. Use keyword blocking according to a schedule that you set. (See
Schedule When to Block Internet Sites
on page
36.)
•
Always
. Use keyword blocking continuously.
6.
In the
keyword
field, enter a keyword or domain that you want to block.
•
•
Specify .com if you want to allow only sites with domain suffixes such as .edu or .gov.
•
Enter a period (
.
) to block all Internet browsing access.

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