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Page 61 / 134 Scroll up to view Page 56 - 60
53
Chapter 6: Setting Up and Configuring the Router
Firewall Tab
Wireless-N Gigabit Security Router with VPN
7.
If you wish to block access to Web sites, use the
Website Blocking by URL Address
or
Website Blocking
by Keyword
feature.
•
Website Blocking by URL Address
. Enter the URL or Domain Name of the web sites you wish to block.
•
Website Blocking by Keyword
. Enter the keywords you wish to block in the fields provided. If any of
these Keywords appears in the URL of a web site, access to the site will be blocked. Note that only the
URL is checked, not the content of each Web page.
8.
Click the
Save Settings
button to save the policy settings.
Figure 6-36: Firewall - Internet Access Policy
(List of PCs to apply policy)
Figure 6-35: Firewall - Internet Access Policy
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Page 62 / 134
54
Chapter 6: Setting Up and Configuring the Router
Firewall Tab
Wireless-N Gigabit Security Router with VPN
Single Port Forwarding
This is one of the NAPT (Network Address Port Translation) feature. Use the Single Port Forwarding screen when
you want to open specific services (that use single port). This allows users on the Internet to access this server
by using the WAN port address and the matched external port number. When users send these types of request to
your WAN port IP address via the Internet, the NAT Router will forward those requests to the appropriate servers
on your LAN.
Application Name
. Enter the name of the application you wish to configure.
External Port
. This is the port number used by the service or Internet application. Internet users must connect
using this port number. Check with the software documentation of the Internet application for more information.
Internal Port
. This is the port number used by the Router when forwarding Internet traffic to the PC or server on
your LAN and is usually the same as the External Port number. If it is different, the Router performs a Port
Translation, so that the port number used by Internet users is different from the port number used by the server or
Internet application.
For example, you could configure your Web Server to accept connections on both port 80 (standard) and port
8080. Then, enable Port Forwarding, set the External Port to 80 and the Internal Port to 8080. Now, any traffic
from the Internet to your Web server will be using port 8080, even though the Internet users used the standard
port, 80. (Users on the local LAN can and should connect to your Web Server using the standard port 80.)
Protocol
. Select the protocol used for this application,
TCP
and/or
UDP
.
IP Address
. For each application, enter the IP address of the PC running the specific server application.
Enabled
. Select
Enabled
to enable port forwarding for the relevant server application.
Change these settings as described here and click
Save Settings
to apply your changes, or click
Cancel
Changes
to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More
for additional details.
Figure 6-37: Firewall - Single Port Forwarding
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55
Chapter 6: Setting Up and Configuring the Router
Firewall Tab
Wireless-N Gigabit Security Router with VPN
Port Range Forwarding
This is one of the NAPT (Network Address Port Translation) features. The Port Range Forwarding screen allows
you to set up public services on your network, such as web servers, ftp servers, e-mail servers, or other
specialized Internet applications that use one or multiple port numbers (e.g. video conference). The port numbers
being used will not change while forwarding to the local network. This allows users on the Internet to access this
server by using the WAN port IP address and the pre-defined port numbers. When users send these types of
requests to your WAN port IP address via the Internet, the NAT Router will forward those requests to the
appropriate servers on your LAN.
Application
. Enter the name of the application you wish to configure.
Start
. This is the beginning of the port range. Enter the beginning of the range of port numbers (external ports)
used by the server or Internet application. Check with the software documentation of the Internet application for
more information if necessary.
End
. This is the end of the port range. Enter the end of the range of port numbers (external ports) used by the
server or Internet application. Check with the software documentation of the Internet application for more
information if necessary.
Protocol
. Select the protocol(s) used for this application,
TCP
and/or
UDP.
IP Address
. For each application, enter the IP address of the PC running the specific application.
Enabled
. Select
Enabled
to enable port range forwarding for the relevant application.
Change these settings as described here and click
Save Settings
to apply your changes, or click
Cancel
Changes
to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More
for additional details.
Figure 6-38: Port Range Forwarding
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56
Chapter 6: Setting Up and Configuring the Router
Firewall Tab
Wireless-N Gigabit Security Router with VPN
Port Range Triggering
This is one of the NAPT (Network Address Port Translation) feature. Port Range Triggering is used for special
applications that can request a port to be opened on demand. For this feature, the Wireless Router will watch
outgoing packets for specific port numbers. This will trigger the Wireless Router to allow the incoming packets
within the specified forwarding range and forward those packets to the triggering PC. One of the example
applications is QuickTime. It would use port 1000 for outgoing packets and 2000 for incoming packets.
Application Name
. Enter the name of the application you wish to configure.
Triggered Range
. For each application, list the triggered port number range. These are the ports used by
outgoing traffic. Check with the Internet application documentation for the port number(s) needed. In the first
field, enter the starting port number of the Triggered Range. In the second field, enter the ending port number of
the Triggered Range.
Forwarded Range
. For each application, list the forwarded port number range. These are the ports used by
incoming traffic. Check with the Internet application documentation for the port number(s) needed. In the first
field, enter the starting port number of the Forwarded Range. In the second field, enter the ending port number of
the Forwarded Range.
Enabled
. Select
Enabled
to enable port range triggering for the relevant application.
Change these settings as described here and click
Save Settings
to apply your changes, or click
Cancel
Changes
to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More
for additional details.
Figure 6-39: Port Range Triggering
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57
Chapter 6: Setting Up and Configuring the Router
Firewall Tab
Wireless-N Gigabit Security Router with VPN
Service
This screen allows users to define new service types based on TCP or UDP. The new service will be added to the
summary table below. It will also show up in the service drop-down menu under
Edit IP ACL Rule
screen.
Name
: Define the new service name. The service name must be different from existing pre-defined or
user-defined services.
Type
: The service can rely on UDP only, TCP only, or both UDP and TCP.
Start
Port
: Enter the starting port number.
Finish
Port
: Enter the finishing port number. The finishing port number must be greater or equal to starting port
number.
Save
button: Click this button to save a new defined service.
Delete
button: To delete an existing service, click the
Edit
button at the end of each row in the summary table.
Edit
button: Use this button to select a service to modify or delete.
Figure 6-40: Firewall - Services
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