Advanced Settings

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N450 WiFi Cable Modem Router Model N450/CG3000Dv2



To remove a computer from the list:

1.

Type

in the address field of your web browser.

A login screen displays.

2.

Enter the modem router user name and password.

The default user name is

admin

. The default password is

password

. The user name and

password are case-sensitive.

The modem router main menu displays.

3.

In the main menu, under Advanced, select

MAC Filtering

.

The MAC Filtering screen displays.

4.

In the MAC Filter List, select the computer.

5.

Click the

Delete

button.

6.

Click the

Apply

button.

Your changes are saved.

IP Filtering

By default, any computer is allowed access to the Internet through your modem router. You

can use IP filtering to block specific computers based on their IP addresses from access to

the Internet on selected days and times.



To set up IP filtering:

1.

Type

in the address field of your web browser.

Advanced Settings

57

N450 WiFi Cable Modem Router Model N450/CG3000Dv2

A login screen displays.

2.

Enter the modem router user name and password.

The default user name is

admin

. The default password is

password

. The user name and

password are case-sensitive.

The modem router main menu displays.

3.

In the main menu, under Advanced, select

IP Filtering

.

The following screen displays:

The Trusted Devices table shows computers that are allowed access to the Internet

through your modem router.

4.

Add devices to the IP Filter List as needed:

•

If the computer you want to add appears in the Trusted Devices table, select its radio

button to capture its IP address.

If the computer you want is not listed, click the

Refresh

button to update the Trusted

Devices table.

Advanced Settings

58

N450 WiFi Cable Modem Router Model N450/CG3000Dv2

•

If the name of the computer you want to add does not display, you can type a name

for the computer you are adding; or enter the IP address of the computer you want to

block.

5.

Click the

Add

button.

The

Enable

check box is automatically selected.

6.

Select the days to block.

7.

In the Time of Day to Block section, select a start time and an end time. This time range

applies to each day you selected in Day(s) to Block section for the specific computer.

All

day

is the default value. Clear the

All day

check box if you specify a start time and end time.

8.

Click the

Apply

button.

Your changes are saved.



To delete a device from the IP Filter List:

1.

Type

in the address field of your web browser.

A login screen displays.

2.

Enter the modem router user name and password.

The default user name is

admin

. The default password is

password

. The user name and

password are case-sensitive.

The modem router main menu displays.

3.

In the main menu, under Advanced, select

IP Filtering

.

4.

Select a device from the

IP Filter

list.

5.

Click the

Delete

button.

Your device is removed from the

IP Filter

list.

6.

Click the

Apply

button.

Your changes are saved.

Port Blocking

You can use port blocking to block outbound traffic on specific ports. Outbound traffic rules

control access to outside resources from local users. The default rule is to allow all access

Advanced Settings

59

N450 WiFi Cable Modem Router Model N450/CG3000Dv2

from the LAN side to the outside. You can use port blocking to add predefined or custom

rules to specify exceptions to the default rule.

Note:

The default rule allows any outbound traffic not blocked by rules that

you create.



To add a custom service:

1.

Type

in the address field of your web browser.

A login screen displays.

2.

Enter the modem router user name and password.

The default user name is

admin

. The default password is

password

. The user name and

password are case-sensitive.

The modem router main menu displays.

3.

In the main menu, under Advanced, select

Port Blocking

.

The following screen displays:

4.

From the

Service

list, select the service you want to block.

5.

To add a custom service that is not in the list of services, specify these settings in the Add

Custom Service table:

•

Name

. A name for the service.

Advanced Settings

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N450 WiFi Cable Modem Router Model N450/CG3000Dv2

•

Start Port

. The start of the range of ports for the service.

•

End Port

. The end of the range of port for the service.

•

Protocol

. The protocol for the ports:

-

TCP

. TCP only.

-

UDP

. UDP only.

-

Both

. Both TCP and UDP.

•

Local IP Address

. The local IP address for the computer that is using the service.

6.

Click the

Add

button.

Your settings are saved. The Active Filters table now displays the list of ports that are

currently blocked.



To delete a custom service from the Active Filters table:

1.

Type

in the address field of your web browser.

A login screen displays.

2.

Enter the modem router user name and password.

The default user name is

admin

. The default password is

password

. The user name and

password are case-sensitive.

The modem router main menu displays.

3.

In the main menu, under Advanced, select

Port Blocking

.

The Port Blocking screen displays.

4.

Select the radio button in the Active Filters table for the custom service that you want to

delete.

5.

Click the

Delete

button.

The custom service is deleted.



To clear all the fields in the Add Custom Service table or to unselect a radio button

from the Active Filters table:

1.

Type

in the address field of your web browser.