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Add (3):
Click ‘Add’ button to add the URL / keyword to the
URL / Keyword filtering table.
Reset (4):
Click ‘Reset’ to remove the value you inputted in
URL/Keyword field.
Current URL
All existing URL/Keywords in filtering
Blocking Table (5):
table will be listed here.
Delete Selected (6):
If you want to delete a specific URL/Keyword entry,
check the ‘select’ box of the MAC address you want
to delete, then click ‘Delete Selected’ button. (You
can select more than one MAC addresses).
Delete All (7):
If you want to delete all URL/Keyword listed here,
please click ‘Delete All’ button.
Reset (8):
You can also click ‘Reset’ button to unselect all
URL/Keywords.
After you finish with all settings, please click ‘Apply’ (9) button, and the
following message will be displayed on your web browser:
Please click ‘Continue’ to go back to previous setup menu; to continue on
other setup procedures, or click ‘Apply’ to reboot the router so the
settings will take effect (Please wait for about 30 seconds while router is
rebooting).
If you want to reset all settings in this page back to previously-saved
value, please click ‘Cancel’ button.
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108
3-3-3 DoS Attack Prevention
Denial of Service (DoS) is a common attack measure, by transmitting a
great amount of data or request to your Internet IP address and server, the
Internet connection will become very slow, and server may stop
responding because it is not capable of handling too much traffic.
This router has a built-in DoS attack prevention mechanism; when you
activate it, the router will stop the DoS attack for you.
Please follow the following instructions to set DoS prevention
parameters:
Please click ‘Security’ tab at the top of web management interface, then
click ‘DoS’, and the following message will be displayed on your web
browser:
Here are descriptions of every setup items:
Ping of Death (1):
Ping of Death is a special packet, and it will cause
certain computer to stop responding. Check this box
and the router will filter this kind of packet out.
Discard Ping
Ping is a common and useful tool to know
From WAN (2):
the connection status of a specified remote network
device, but some malicious intruder will try to fill
your network bandwidth with a lot of PING request
data packet, to make your internet connection
become very slow, even unusable. Check this box
and the router will ignore all inbound PING request,
1
2
3
4
5
6
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but when you activate this function, you will not be
able to ping your own router from internet, too.
Port Scan (3):
Some malicious intruder will try to use a ‘port
scanner’ to know how many ports of your Internet
IP address are open, and they can collect a lot of
valuable information by doing so. Check this box
and the router will block all traffics which are trying
to scan your Internet IP address.
Sync Flood (4):
This is another kind of attack, which uses a lot of
fake connection request to consume the memory of
your server, and try to make your server become
unusable. Check this box and the router will filter
this kind of traffic out.
Advanced
Click this button and you can set advanced
Settings (5):
settings of the DoS prevention method listed above,
please see section 3-3-3-1 ‘DoS – Advanced
Settings’ below.
After you finish with all settings, please click ‘Apply’ (6) button and the
following message will be displayed on your web browser:
Please click ‘Continue’ to go back to previous setup menu; to continue on
other setup procedures, or click ‘Apply’ to reboot the router so the
settings will take effect (Please wait for about 30 seconds while router is
rebooting).
If you want to reset all settings in this page back to previously-saved
value, please click ‘Cancel’ button.
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110
3-3-3-1 DoS - Advanced Settings
When you click ‘Advanced’ button in DoS menu, the following message
will be displayed on your web browser:
Here are descriptions of every setup items:
Ping of Death (a):
Set the threshold of when this DoS prevention
mechanism will be activated. Please check the box
of Ping of Death, and input the frequency of
threshold (how many packets per second, minute, or
hour), you can also input the ‘Burst’ value, which
means when this number of ‘Ping of Death’ packet
is received in very short time, this DoS prevention
mechanism will be activated.
Discard Ping
Check the box to activate this DoS
From WAN (b):
prevention mechanism.
Port Scan (c):
Many kind of port scan methods are listed here,
please check one or more DoS attack methods you
want to prevent.
Sync Flood (d):
Like Ping of Death, you can set the threshold of
when this DoS prevention mechanism will be
activated.
a
b
c
d
e
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111
After you finish with all settings, please click ‘Apply’ (6) button and the
following message will be displayed on your web browser:
Please click ‘Continue’ to go back to previous setup menu; to continue on
other setup procedures, or click ‘Apply’ to reboot the router so the
settings will take effect (Please wait for about 30 seconds while router is
rebooting).
If you want to reset all settings in this page back to previously-saved
value, please click ‘Cancel’ button.
3-3-4 Demilitarized Zone (DMZ)
Demilitarized Zone (DMZ) refers to a special area in your local network.
This area resides in the local network, and all computers in this area use
private IP addresses, too. But these private IP addresses are mapped to a
certain Internet IP address, so other people on the Internet can fully
access those computers in DMZ.
Please follow the instructions to set DMZ parameters:
Please click ‘Security’ tab at the top of web management interface, then
click ‘DMZ’, and the following message will be displayed on your web
browser:

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