USB Storage

56

N300 Wireless ADSL2+ Modem Router DGN2200v4

3.

To add a folder, click

Create Network Folder

.

If the Add a Network Folder screen does not display, your web browser might be blocking

pop-ups. If it is, then change the browser settings to allow pop-ups.

4.

In the Folder field, browse and select the folder.

5.

Fill in the Share Name field.

6.

In the Read Access list and the Write Access list, select the setting that you want.

The user name (account name) for All – no password is guest. The password for admin is

the same one that is used to log in to the modem router. By default, it is password.

7.

Click

Apply

.

The folder is added on the USB device.



To edit a network folder:

1.

Select

Advanced > ReadySHARE

.

2.

Click the

Edit

button.

The Edit Network Folder screen displays the same settings shown in the Add a Network

Folder screen.

3.

Change the settings in the fields as needed.

4.

Click

Apply

.

Your changes are saved.

USB Storage

57

N300 Wireless ADSL2+ Modem Router DGN2200v4

Specify Approved USB Devices

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



To set up approved USB devices:

1.

Select

Advanced > Advanced Setup > USB Settings.

2.

Click the Approved Devices

button.

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

remove or add approved USB devices.

3.

In the Available USB Devices list, select the drive that you want to approve.

4.

Click

Add

.

5.

Select the

Allow only approved devices

check box.

6.

Click

Apply.

Your change takes effect.

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

Safely Remove USB Device

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

this process.

58

6

6.

Security

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

objectionable content from reaching the computers and devices on your network.

This chapter includes the following sections:

•

Keyword Blocking of HTTP Traffic

•

Set Up Firewall Rules to Control Network Access

•

Port Triggering to Open Incoming Ports

•

Port Forwarding to Permit External Host Communications

•

How Port Forwarding Differs from Port Triggering

•

Set Up Port Forwarding to Local Servers

•

Set Up Port Triggering

•

Schedule When to Block the Internet

•

Security Event Email Notifications

Security

59

N300 Wireless ADSL2+ Modem Router DGN2200v4

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.



To set up keyword blocking:

1.

Select

Advanced > Security >

Block Sites

.

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.

3.

Click Apply.

Your changes are saved.



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

.

Your changes are saved.

Security

60

N300 Wireless ADSL2+ Modem Router DGN2200v4

Set Up Firewall Rules to Control Network Access

Your modem router has a firewall that blocks unauthorized access to your wireless network

and permits authorized inbound and outbound communications. Authorized communications

are established according to inbound and outbound rules. The firewall has the following two

default rules

•

Inbound

. Block all access from outside except responses to requests from the LAN side.

•

Outbound

. Allow all access from the LAN side to the outside.

You can add rules to further restrict the outbound communications or more widely open the

inbound communications. Exceptions can be based on the service or application, source or

destination IP addresses, and time of day. You can log traffic that matches or does not match

the rule and change the order of rule precedence.

Traffic attempting to pass through the firewall is subjected to the rules in the order shown in

the Rules table from the top (highest precedence) to the bottom. In some cases, the order of

precedence determines which communications are allowed into or out of the network.



To set up firewall rules:

1.

Select

Advanced > Security >

Firewall Rules

.

2.

You can add, edit, or delete a rule.

•

To add an outbound rule, click

Add

under Outbound Services.

•

To edit or delete a rule, select its button on the left side and click

Edit

or

Delete

.

3.

(Optional) Change the order of precedence:

a.

Select the button on the left side of the rule and click

Move

.

b.

At the prompt, enter the number of the new position and click

OK

.

4.

(Optional) To open or close instant messaging, select one of the following radio buttons:

•

Close IM Ports

. Disables instant messaging traffic.

•

Open IM Ports

. Enables instant messaging traffic. IM ports are open by default.

5.

Click

Apply.

Your changes are saved.