USB Storage

56

N600 Wireless Dual Band Router WNDR3400v2

Specify Approved USB Devices

For more security, you can set up the router to share approved USB devices only. You can

access this feature from the Advanced Setup menu on the Advanced tab.



To set up approved USB devices:

1.

Select

Advanced > Advanced Setup > USB Settings

. The following screen displays:

2.

Click the

Approved Devices

button. The USB Drive Approved Devices screen displays:

This screen shows the approved USB devices and the available USB devices. You can

remove or add approved USB devices.

USB Storage

57

N600 Wireless Dual Band Router WNDR3400v2

3.

To add an approved USB device, select it from the Available USB Devices list, and then click

Add

.

4.

Select the

Allow only approved devices

check box.

5.

Click

Apply

so that your change takes effect.

If you want to work with another USB device, you have to first click the

Safely Remove USB

Device

button for the currently connected USB device. Connect the other USB device, and

repeat this process.

Connect to the USB Drive from a Remote Computer

To connect to the USB drive from remote computers with a web browser, you have to use the

router’s Internet port IP address. If you are using Dynamic DNS, you can type the DNS name,

rather than the IP address. You can view the router’s Internet IP address from the dashboard

on the Basic Home screen or the Advanced Home screen.

Access the Router’s USB Drive Remotely Using FTP



To connect to the router’s USB drive using a web browser:

1.

Connect to the router by typing

ftp://

and the Internet port IP address in the address

field of Internet Explorer or Netscape Navigator, for example:

If you are using Dynamic DNS, you can type the DNS name, rather than the IP address.

2.

Type the account name and password that has access rights to the USB drive. The user

name (account name) for All – no password is

guest

.

3.

The directories of the USB drive that your account has access to are displayed, for example,

share/partition1/directory1. You can now read and copy files from the USB directory.

58

6

6.

Security

Keeping unwanted content out of your network

This chapter explains how to use the basic firewall features of the router to prevent objectionable

content from reaching the PCs and other devices connected to your network.

This chapter includes the following sections:

•

Keyword Blocking of HTTP Traffic

•

Block Services (Port Filtering)

•

Schedule Blocking

•

Security Event Email Notifications

Security

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N600 Wireless Dual Band Router WNDR3400v2

Keyword Blocking of HTTP Traffic

Use keyword blocking to prevent certain types of HTTP traffic from accessing your network.

The blocking can be always or according to a schedule.

1.

Select

Advanced > Security >

Block Sites

to display the following screen:

2.

Select one of the keyword blocking options:

•

Per Schedule

. Turn on keyword blocking according to the Schedule screen settings.

•

Always

. Turn on keyword blocking all the time, independent of the Schedule screen.

3.

In the Keyword field, enter a keyword or domain, click

Add Keyword

, and click

Apply

.

The Keyword list supports up to 32 entries. Here are some sample entries:

•

Specify XXX to block http://www.badstuff.com/xxx.html.

•

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.



To delete a keyword or domain:

1.

Select the keyword you want to delete from the list.

2.

Click

Delete Keyword,

and then

Apply

to save your changes.



To specify a trusted computer:

You can exempt one trusted computer from blocking and logging. The computer you exempt

has to have a fixed IP address.

1.

In the Trusted IP Address field, enter the IP address.

2.

Click

Apply

to save your changes.

Security

60

N600 Wireless Dual Band Router WNDR3400v2

Block Services (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 the Internet sends a

request for service to a server computer, 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 the destination port number 80 is an HTTP

(web server) request.

The service numbers for many common protocols are defined by the Internet Engineering

Task Force (IETF at

) and published in RFC1700, “Assigned Numbers.”

Service numbers for other applications are typically chosen from the range 1024 to 65535 by

the authors of the application. Although the router already holds a list of many service port

numbers, you are not limited to these choices. You can often determine port number

information by contacting the publisher of the application, by asking user groups or

newsgroups, or by searching.

The Block Services screen lets you add and block specific Internet services by computers on

your network. This is called service blocking or port filtering. To add a service for blocking,

first determine which port number or range of numbers are used by the application.



To block services:

1.

Select

Advanced > Security > Block Services

to display the following screen:

2.

Select either

Per Schedule

or

Always

to enable service blocking, and click

Apply

. If you

selected Per Schedule, specify a time period in the Schedule screen as described in

Schedule Blocking

on page

61.