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Page 61 / 168 Scroll up to view Page 56 - 60
Manage the Firewall and Secure Your Network
61
AC1900, N900, and N450 WiFi
Cable Data Gateways
The keyword or domain is removed from the blocked list.
8.
Click the
Apply
button.
Your settings are saved.
Remove All Keywords and Domains from the Blocked List
You can simultaneously remove all keywords and domains from the blocked list.
To remove all keywords and domains from the blocked list:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Security >
Block Sites
.
The Block Sites screen displays.
6.
Click the
Clear List
button.
All keywords and domains are removed from the blocked list.
7.
Click the
Apply
button.
Your settings are saved.
Specify a Trusted Computer
You can exempt one trusted device from blocking and logging. The device that you exempt
must be assigned a fixed (static) IP address.
To specify a trusted device:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
Page 62 / 168
Manage the Firewall and Secure Your Network
62
AC1900, N900, and N450 WiFi
Cable Data Gateways
The BASIC Home screen displays.
5.
Select
ADVANCED > Security >
Block Sites
.
The Block Sites screen displays.
6.
Scroll down and select the
Allow trusted IP address to visit blocked sites
check box.
7.
In the
Trusted IP Address
field, enter the IP address of the trusted device.
The first three octets of the IP address are automatically populated and depend on the IP
address that is assigned to the cable data gateway on the LAN Setup screen.
8.
Click the
Apply
button.
Your settings are saved.
Block Access to Services and Applications
Services are functions that servers perform at the request of client devices. For example,
web servers serve web pages, time servers serve time and date information, and game hosts
serve data about the moves of the players.
When a device on the Internet sends a request for service to a server, the requested service
is identified by a service or port number. (For this reason, service blocking is also referred to
as port filtering.) The service or port 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 1024–65535 by
Page 63 / 168
Manage the Firewall and Secure Your Network
63
AC1900, N900, and N450 WiFi
Cable Data Gateways
the authors of the application. Although the cable data gateway already holds a list of many
service port numbers, you are not limited to these choices.
You can block access to specific Internet services by devices on your network. This feature is
called service blocking or port filtering. The cable data gateway provides default (predefined)
services that you can select to block. You can also add a new service for blocking, but you
first must find out which port number or range of numbers the application uses. You can find
port number information by contacting the publisher of the application, by asking user groups
or newsgroups, or by searching the Internet.
Block a Default Service
You can set up blocking of specific services to occur continuously or according to a schedule.
To block a default service:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Security > Block Services
.
The Block Services screen displays.
Page 64 / 168
Manage the Firewall and Secure Your Network
64
AC1900, N900, and N450 WiFi
Cable Data Gateways
6.
Specify a keyword blocking option:
•
Per Schedule
. Use service blocking according to a schedule that you set.
For more information, see
Schedule When Features Are Active
on page
68.
•
Always
. Use service blocking continuously.
7.
Click the
Add
button.
The Block Services Setup screen displays.
8.
From the
Service Type
menu, select the default application or service to block.
The menu displays several common services, but you are not limited to these choices.
For information about how to add any additional services or applications, see
Add and
Block a Custom Service
on page
65.
9.
Under Filter Services For, select an IP address configuration:
•
Only This IP Address
. Complete the IP address for the device for which the
application or service must be blocked.
•
IP Address Range
. Complete the IP address range for the devices for which the
application or service must be blocked.
•
All IP Addresses
. The application or service is blocked for all IP addresses on your
network.
10.
Click the
Add
button.
Your changes are saved in the table on the Block Services screen. However, if you restart
the cable data gateway, the changes are lost. You also must apply the changes on the
Block Services screen.
11.
On the Block Services screen, click the
Apply
button.
Page 65 / 168
Manage the Firewall and Secure Your Network
65
AC1900, N900, and N450 WiFi
Cable Data Gateways
Your settings are saved.
Add and Block a Custom Service
If the service that you want to block is not on the default service list, you can define a custom
service.
To add and block a custom service:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Security > Block Services
.
The Block Services screen displays.
6.
Specify a keyword blocking option:
•
Per Schedule
. Use service blocking according to a schedule that you set.
For more information, see
Schedule When Features Are Active
on page
68.
•
Always
. Use service blocking continuously.

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