EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 Switch
47
Setting Up Filters
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To set up a filter using IP addresses, enter the range of IP addresses you
wish to filter into the IP address fields. Users who have filtered IP address-
es will not be able to access the Internet at all. If you only want to filter one
IP address instead of a range of IP addresses, enter the same value into both
fields. For instance, if you wish to filter the PC with the IP address of
192.168.1.5, enter 5 into both fields on one line: 192.168.1.5 ~
192.168.1.5. Click the Apply button and Continue button when you’re
done.
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To filter users by network port number, enter a network port number or a
range of network ports. Enter the port numbers you want to filter into the
port numbers fields. Users connected to the Router will no longer be able
to access any port number listed there.
Editing MAC Filter Setting
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This feature filters the network adapter’s specific MAC address from going
out to the Internet.
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To check your network adapter’s MAC address, run winipcfg or ipconfig in
the command prompt. To set the MAC filter, click the Edit MAC Filter
Setting button. When a second window appears, select the range in the
drop-down box, and at the MAC number prompt, enter the 12-digit MAC
address you want to filter. Click the Apply button, followed by the
Continue button, and then close the window.
SPI (Stateful Packet Inspection)
This feature checks the state of a packet to verify that the destination IP address
matches the source IP of the original request. To use the firewall, select
Enable; otherwise, select Disable to use the NAT firewall.
Blocking WAN Requests
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By enabling the Block WAN Request feature, 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 net-
work ports. Both functions of the Block WAN Request feature make it more
difficult for outside users to work their way into your network.
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Click the Apply button and then the Continue button to save your changes.
Using Multicast Pass Through
This feature allows for multiple transmissions to specific recipients at the same
time. Select Enable to support the feature, or Disable to keep the Router from
multicasting.
IP filters block specific internal users from accessing the Internet and enable
VPN (Virtual Private Network) tunnels. This is handled from the Filters tab,
shown in Figure 6-30. You can set up filters by using IP addresses or network
port numbers (or a range of ports).
Filters
Figure 6-30
Instant Broadband
®
Series
46