N600 Wireless Dual Band Router WNDR3400 User Manual

Protecting Your Network

3-2

v1.0, August 2010

Changing the Built-In Password

1.

Log in to the wireless router at its default LAN address of

with

its default user name of

admin

, default password of

password

, or using whatever password

and LAN address you have chosen for the wireless router.

2.

From the main menu, under the Maintenance heading, select

Set Password

to display the Set

Password screen:

3.

To change the password, first enter the old password, and then enter the new password twice.

4.

Click

Apply

to save your changes.

Restricting Access by MAC Address

For increased security, you can restrict access to the wireless network to allow only specific PCs

based on their MAC addresses. You can restrict access to only trusted PCs so that unknown PCs

cannot wirelessly connect to the WNDR3400 router. MAC address filtering adds an obstacle

against unwanted access to your network, but the data broadcast over the wireless link is fully

exposed.

To restrict access based on MAC addresses:

1.

Log in to the wireless router at its default LAN address of

with

its default user name of

admin

, and default password of

password

, or using whatever

password and LAN address you have chosen for the wireless router.

Note:

After changing the password, you must log in again to continue the

configuration. If you have backed up the wireless router settings previously,

you should do a new backup so that the saved settings file includes the new

password.

Note:

If you configure the router from a wireless computer, add your computer’s

MAC address to the access list. Otherwise you will lose your wireless

connection when you click Apply. You must then access the wireless router

from a wired computer, or from a wireless computer that is on the access

control list, to make any further changes.

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2.

From the main menu, select , and then click

Setup Access List

to display the Wireless Card

Access List screen.

3.

Click

Add

to add a wireless device to the wireless access control list. The Wireless Card

Access Setup screen opens and displays a list of currently active wireless cards and their

Ethernet MAC addresses.

4.

Adjust the list as needed for your network. You can add devices using either of the following

methods:

•

If the computer is in the Available Wireless Cards table, select the radio button of that

computer to capture its MAC address.

Figure 3-1

Figure 3-2

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Protecting Your Network

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•

Use the

Add

button to enter the MAC address of the device to be added. The MAC

address can usually be found on the bottom of the wireless device.

5.

Click

Add

, and then click

Apply

to save these settings. Now, only devices on this list will be

allowed to wirelessly connect to the router.

Blocking Access to Internet Sites

The WNDR3400 router allows you to restrict access based on Web addresses and Web address

keywords. Up to 255 entries are supported in the Keyword list.

Keyword application examples:

•

If the keyword

XXX

is specified, the URL www.zzzyyqq.com/xxx.html is blocked.

•

If the keyword

.com

is specified, only websites with other domain suffixes (such as .edu, .org,

or .gov) can be viewed.

To block access to Internet sites:

1.

Select

Block Sites

under Content Filtering in the main menu. The Block Sites screen displays.

Note:

If no device name appears when you enter the MAC address, you can type a

descriptive name for the computer that you are adding.

Figure 3-3

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2.

Enable keyword blocking by selecting either

Per Schedule

or

Always

.

To block by schedule, be sure to specify a time period in the Schedule screen. For information

about scheduling, see

“Scheduling Blocking” on page 3-8

.

Block all access to Internet browsing during a scheduled period by entering a dot (

.

) as the

keyword, and then set a schedule in the Schedule screen.

3.

Add a keyword or domain by entering it in the keyword field and clicking

Add Keyword

. The

keyword or domain name then appears the

Block sites containing these keywords or domain

names

list.

Delete a keyword or domain name by selecting it from the list and clicking

Delete Keyword

.

4.

You can specify one trusted user, which is a computer that is exempt from blocking and

logging. Specify a trusted user by entering that computer’s IP address in the

Trusted IP

Address

fields.

Since the trusted user is identified by IP address, you should configure that computer with a

fixed IP address.

5.

Click

Apply

to save all your settings in the Block Sites screen.

Blocking Access to Internet Services

The wireless router allows you to block the use of certain Internet services by computers on your

network. This is called service blocking or port filtering. Services are functions performed by

server computers at the request of client computers. For example, Web servers serve Web pages,

time servers serve time and date information, and game hosts serve data about other players’

moves. When a computer on your network sends a request for service to a server computer on the

Internet, the requested service is identified by a service or port number. This number appears as the

destination port number in the transmitted IP packets. For example, a packet that is sent with

destination port number 80 is an HTTP (Web server) request.

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Protecting Your Network

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To block access to Internet services:

1.

Select

Block Services

under Content Filtering in the main menu. The Block Services screen

displays.

2.

Enable service blocking by selecting either

Per Schedule

or

Always

, and then click

Apply

.

To block by schedule, be sure to specify a time period in the Schedule screen. For information

about scheduling, see

“Scheduling Blocking” on page 3-8

.

3.

Specify a service for blocking by clicking

Add

. The Block Services Setup screen displays.

Figure 3-4

Figure 3-5

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