Forwarding - Linksys BEFDSR41W User Manual

• Filtered Private Port Range To filter users by network port number, enter a
network port number or a range of network ports. Select the protocol for each
port number you want to filter, TCP or UDP. Enter the port numbers you want
to filter in the port numbers fields. Users connected to the Gateway will no
longer be able to access any port number listed there.
Private MAC Filter
• Click the Edit MAC Filter Setting button to filter users by entering their
physical addresses.
In the MAC Filter Setting screen, enter the MAC addresses that you want to
filter in the MAC address fields. The users with the filtered MAC addresses
will not be able to access the Internet. Click the Apply button and the
Continue button, before closing the window.
Block WAN Requests
• This feature is designed to protect users from Internet hackers and other
attacks. When enabled, the Gateway will ignore both unknown TCP and
ICMP packets from the WAN side. By enabling the Block WAN Request fea-
ture, you can prevent your network from being "pinged," or detected, by other
Internet users. The Block WAN Request feature also reinforces your network
security by hiding your network ports. Both functions of the Block WAN
Request feature make it more difficult for outside users to work their way into
your network.
Remote Management
• This feature allows you to manage or configure the Gateway from a remote
location, via the Internet. To enable management through the WAN connec-
tion, click Enable, and use port 8080 on the remote PC you are using for
remote management.
Remote Upgrade
• This feature allows you to upgrade the Gateway's firmware from a remote
location. To enable Remote Upgrade, click Enable.
Telnet Configuration
• This feature enables or disables telnet access to the Gateway.
To clear any values you've entered on any page, click Cancel and re-enter
information. To apply any settings you've altered on any page, click the Apply
button. Once all settings are correct, click Continue. For more information on
this tab, you can click the Help button.
48
Instant Broadband Series
™
ADSL Gateway with Modem / Router / 4-Port Switch / Wireless-Ready

Forwarding

Important: This is an Advanced Function. No changes should be made
to this tab without a thorough understanding of network concepts.
Port Range Forwarding sets up public services on your network, such as web
servers, ftp servers, e-mail servers, or other specialized Internet applications.
(Specialized Internet applications are any applications that use Internet access
to perform functions such as videoconferencing or online gaming. Some
Internet applications may not require any forwarding.) When users send this
type of request to your network via the Internet, the Gateway will forward those
requests to the appropriate PC.
You may use this feature to establish a web server or FTP server for Internet
users to access. Be sure that you enter a valid IP address; you may need to
establish a static IP address with your ISP in order to properly run an Internet
server. For added security, Internet users will be able to communicate with the
server, but they will not actually be connected. The packets will be forwarded
through the Gateway instead. If you need to forward all ports to one PC, see the
"DMZ" section.
Figure 6-20
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