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IP Filtering:
Enable IP Filtering
Check the box to enable IP filtering and select
whether to “Deny” or “Allow” access for
specified IP address.
Add PC
Opens a new window to add a new IP to the
list, to deny or allow access/services according
to above.
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83
Client PC
Description
Enter a description for reference/identification
of up to 16 alphanumeric characters.
Client PC IP address
Enter a starting IP address in the left field and
the end IP address in the right field to define a
range of IP addresses; or enter an IP address in
the left field only to define a single IP address.
Service Name
Various services are listed here with a short
description. Check/uncheck the box for each
service you wish to select.
Protocol
Select protocol “TCP” or “UDP” or “Both” for a
service not included in the “Client PC Service”
list.
Port Range
Enter the port range for the service not
included in the “Client PC Service” list.
Enter a single port number e.g. 110, a range of
port numbers e.g. 110-120, or multiple port
numbers separated by a comma e.g.
110,115,120.
Add
Click “Add”
to add selected services or a user
defined service to the IP filtering table.
IP filtering entries will be listed in the IP filtering table shown below.
Delete Selected/
Delete All
Delete selected or all entries from the table.
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84
III-3-6-3.
DMZ
A Demilitarized Zone (DMZ) is an isolated area in your local network where
private IP addresses are mapped to specified Internet IP addresses, allowing
unrestricted access to the private IP addresses but not to the wider local
network.
You can define a virtual DMZ host here. This is useful for example, if a
network client PC cannot run an application properly from behind an NAT
firewall, since it opens the client up to unrestricted two-way access.
Enable DMZ
Check/uncheck the box to enable/disable the
device’s DMZ function.
Public
Select “Dynamic IP” or “Static IP” here.
For “Dynamic IP” select an Internet connection
session from dropdown menu.
For “Static IP” enter the IP address that you
want to map to a specific private IP address.
Client PC
Enter the private IP address that the internet IP
address will be mapped to.
Computer Name
Select a computer name from the list and click
“<<” to enter its IP address into the “Client PC”
field (above).
Add
Click
Add
to add the client to the
Current
DMZ Table
.
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85
DMZ entries will be displayed in the table shown below:
Delete Selected/
Delete All
Delete selected or all entries from the table.
III-3-6-4.
DoS
Denial-of-Service (DoS) is a common form of malicious attack against a
network. The router
s firewall can protect against such attacks.
If you are not familiar with these functions, it is recommended you keep the
default settings.
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Ping of Death
Specify the frequency of ping of death packets
which will trigger the router’s DoS protection
function.
Discard Ping from
WAN
Check this box and the router will not answer
ping requests from the Internet.
Port Scan
Intruders use “port scanners” to detect open
Internet IP address ports. Check each type of
port scan to prevent.
Sync Flood
Specify the frequency of sync flood packets
which will trigger the DoS protection function.

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