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2-8-1 Port Filtering
By using this function, you can restrict certain types of outbound (from LAN to
Internet) traffic by blocking specific ports. For example, if you don’t want your
LAN devices and computers to access FTP servers on Internet, you can add
port number ‘20’ and ‘21’ to the port filtering list.
For port numbers of common services, please refer to chapter 4-3
‘Well-Known Services’.
The descriptions of every setup item are listed below:
Item Name
Description
Enable Port Filtering
Check this box to enable port filtering.
Port Range
Input the port range to be included in this port
filtering rule. Please input the starting port number
in the left field, and input the ending port number in
the right field. For example, if you want to block
port 20 to 40, input ‘20’ in the left field and input
‘40’ in the right field. If you only want to block a
single port number for this rule, input the port
number in the left field.
Valid port number is from 1 to 65535.
Protocol
Please select the protocol type you want to block
for this rule. You can select ‘TCP’, ‘UDP’ or both.
Comment
Input any descriptive text about this rule, so you
can remember the purpose of this rule. You can
input up to 20 alphanumerical characters in this
field.
Next
Add the MAC address and associated comment to
the list.
Cancel
Discard all settings you made in this page.
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All existing port filtering rules will be listed in ‘Current Filter Table’:
If you want to delete one or more rule(s) listed here, check ‘Select’ box of the
rule(s) you wish to delete, then click ‘Delete Selected’ button; Click ‘Delete All’
to delete all rules. If you want to unselect all selected boxes, click ‘Reset’
button.
2-8-2 IP Filtering
Not only ports, you can also block certain local IP address(es) from accessing
Internet. These IP address(es) will not be able to access Internet, however,
they can still communicate with other LAN devices / computers.
The descriptions of every setup item are listed below:
Item Name
Description
Enable IP Filtering
Check this box to enable IP filtering.
Local IP Address
Input the IP address you wish to add to IP filtering
list. The IP address you inputted here must belong
to the same subnet of current LAN IP address. If
not, you’ll receive an error message when you
attempt to add this IP address to the list.
Protocol
Select the protocol type you wish to block from
dropdown list: ‘TCP’, ‘UDP’, or ‘Both’.
Comment
Input any descriptive text about this rule, so you
can remember the purpose of this rule. You can
input up to 20 alphanumerical characters in this
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72
field.
Next
Add the IP address and associated comment to
the list.
Cancel
Discard all settings you made in this page.
All existing IP filtering rules will be listed in ‘Current Filter Table’:
If you want to delete one or more rule(s) listed here, check ‘Select’ box of the
rule(s) you wish to delete, then click ‘Delete Selected’ button; Click ‘Delete All’
to delete all rules. If you want to unselect all selected boxes, click ‘Reset’
button.
2-8-3 MAC Filtering
Similar to IP filtering, you can block devices / computers with certain MAC
address from accessing Internet.
The descriptions of every setup item are listed below:
Item Name
Description
Enable MAC Filtering
Check this box to enable MAC filtering.
MAC Address
Input the MAC address you wish to add to MAC
filtering list.
Comment
Input any descriptive text about this rule, so you
can remember the purpose of this rule. You can
input up to 20 alphanumerical characters in this
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73
field.
Next
Add the IP address and associated comment to
the list.
Cancel
Discard all settings you made in this page.
All existing MAC filtering rules will be listed in ‘Current Filter Table’:
If you want to delete one or more rule(s) listed here, check ‘Select’ box of the
rule(s) you wish to delete, then click ‘Delete Selected’ button; Click ‘Delete All’
to delete all rules. If you want to unselect all selected boxes, click ‘Reset’
button.
2-8-4 Port Forwarding
This router uses ‘NAT’ (Network Address Translation) to let all devices and
computers on LAN to access Internet. Normally, this is a one-way translation -
Computers on LAN can access Internet, but computer comes from Internet will
not be able to access computers on LAN.
Sometimes you’ll need to let computers from Internet to access certain ports
on LAN, so you can provide services to general public. In this case, you can
use ‘Port Forwarding’ function and computer from Internet can access certain
services on LAN.
For port numbers of common services, please refer to chapter 4-3
‘Well-Known Services’.
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The descriptions of every setup item are listed below:
Item Name
Description
Enable Port Forwarding
Check this box to enable Port forwarding.
IP Address
Input the IP address on LAN you wish to provide
services to computers from Internet.
Protocol
Select the protocol type you wish to block from
dropdown list: ‘TCP’, ‘UDP’, or ‘Both’.
Port Range
Input the port range to be included in this port
forwarding rule, the port number you inputted here
will be mapped to the WAN IP address used by
this router. Please input the starting port number in
the left field, and input the ending port number in
the right field. For example, if you want to block
port 20 to 40, input ‘20’ in the left field and input
‘40’ in the right field. If you only want to block a
single port number for this rule, input the port
number in the left field.
Valid port number is from 1 to 65535.
Comment
Input any descriptive text about this rule, so you
can remember the purpose of this rule. You can
input up to 20 alphanumerical characters in this
field.
Next
Add the IP address and associated comment to
the list.
Cancel
Discard all settings you made in this page.
All existing Port forwarding rules will be listed in ‘Current Port Forwarding
Table’:
If you want to delete one or more rule(s) listed here, check ‘Select’ box of the
rule(s) you wish to delete, then click ‘Delete Selected’ button; Click ‘Delete All’
to delete all rules. If you want to unselect all selected boxes, click ‘Reset’

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