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Advanced Settings
56
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.
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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.
Page 58 / 88
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
Page 59 / 88
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.
Page 60 / 88
Advanced Settings
60
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.

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