Page 61 / 129 Scroll up to view Page 56 - 60
ReadySHARE Printer
61
R6250 Smart WiFi Router
Once the printer shows Available status, it is no longer grayed out in a Paused state in the
Windows Printers and Faxes window.
Figure 9. Printers and Faxes screen
This USB printer is ready. The utility does not need to hold the connection of this USB printer.
When this printer has a print job, the USB utility connects to this USB printer automatically
and prints. After the print job is done, the printer status returns to the Paused state.
Scan with a Multifunction Printer
You can use the scan feature of a multifunction printer.
1.
Make sure that the printer status shows as Available.
2.
Click the
Network Scanner
button.
This activates the scanner window to perform scans.
Page 62 / 129
62
7
7.
Security
Customize the Firewall Settings
This chapter explains how to use the basic firewall features of the 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
Block Services (Port Filtering)
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 Blocking
Security Event Email Notifications
For information about Live Parental Controls, see
Parental Controls
on page
22.
Page 63 / 129
Security
63
R6250 Smart WiFi Router
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 .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.
Page 64 / 129
Security
64
R6250 Smart WiFi Router
Block Services (Port Filtering)
Services are functions that server computers perform 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, a service or port number identifiefs the requested
service. This number is 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 Internet Engineering Task Force (IETF at
) has defined and published
the service numbers for many common protocols in RFC1700, “Assigned Numbers.” Service
numbers for other applications are typically chosen from the range 1024 - 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 the application uses.
To block services:
1.
Select
Advanced > Security > Block Services
.
2.
Select either
Per Schedule
or
Always
.
3.
If you selected Per Schedule, specify a time period in the Schedule screen.
4.
Click
Add
to add a service.
Page 65 / 129
Security
65
R6250 Smart WiFi Router
The Block Services Setup screen displays:
5.
From the Service Type list, select the application or service to allow or block.
The list displays several common services, but you are not limited to these choices. To
add any additional services or applications that are not in the list, select
User Defined.
6.
If you know that the application uses either TCP or UDP, select the appropriate protocol. If
you are not sure, select
Both
.
7.
Enter the starting and ending port numbers.
If the application uses a single port number, enter that number in both fields.
8.
Select the radio button for the IP address configuration you want to block, and enter the IP
addresses.
You can block the specified service for a single computer, a range of computers with
consecutive IP addresses, or all computers on your network.
9.
Click
Add
.
Your changes are saved.
Port Triggering to Open Incoming Ports
Some application servers (such as FTP and IRC servers) send replies to multiple port
numbers. Using the port triggering function of your router, you can tell the router to open
more incoming ports when a particular outgoing port originates a session.
An example is Internet Relay Chat (IRC). Your computer connects to an IRC server at
destination port 6667. The IRC server not only responds to your originating source port, but
also sends an “identify” message to your computer on port 113. Using port triggering, you can
tell the router, “When you initiate a session with destination port 6667, you have to also allow
incoming traffic on port 113 to reach the originating computer.”
Using steps similar to the preceding example, the following sequence shows the effects of
the port triggering rule you have defined:

Rate

4.5 / 5 based on 2 votes.

Bookmark Our Site

Press Ctrl + D to add this site to your favorites!

Share
Top