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D840R ADSL2+ Router User Guide
5.2.3.4 UPNP
1) Click “UPNP” to display
the window shown in the
right figure. Enable
UPnP: Check to Enable
the UPnP (Universal Plug
and Play) function.
UPnP is a kind of
architecture of common
network connection
between the computer
and intelligent
devices/instruments. It
is especially common in
the family application.
Based on the Internet
standards and
technologies (such as
TCP/IP, HTTP and XML),
UPnP enables automatic
connection and
cooperation between
such devices, thus to
make more people can
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D840R ADSL2+ Router User Guide
access the network
(especially the family
network).
Click “Save/Apply” to
activate the settings.
5.2.4 Security
5.2.4.1 IP Filtering
1)
Click “Security”
→
“IP
Filtering” to display the
window shown in the
right figure.
By default, all
outgoing traffic is
allowed. However,
you can set IP filtering
to restrict external
network access by
some computers in
the internal network.
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D840R ADSL2+ Router User Guide
2)
Click “Add” to display
the window shown in
the right figure.
a.
Filter Name: Setting
the filtering name to
facilitate
identification.
b.
Protocol: Selecting one
from four available
protocols: TCP/UDP;
TCP; UDP; ICMP.
c.
Source IP address:
Entering the internal
network IP address to
be filtered.
d.
Source Subnet Mask:
Entering the subnet
mask corresponding
to the internal network
IP address to be
filtered.
e.
Source Port: Entering
the port number of the
internal network IP
address to be filtered.
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D840R ADSL2+ Router User Guide
f.
Destination IP
address: Entering the
external network IP
address to be filtered.
g.
Destination Subnet
Mask: Entering the
subnet mask
corresponding to the
external network IP
address to be filtered.
h.
Destination Port:
Entering the port
number of the
external network IP
address to be filtered.
Based on the above
settings, you can add
your filtering rules.
You can select your
WAN interface.
However, it is
recommended to
keep the default
setting unchanged.
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D840R ADSL2+ Router User Guide
3)
Click “Save/Apply”.
4)
Click “Incoming” to
display the window
shown in the right
figure.
By default, all
incoming traffic is
restricted. However,
you can set IP filtering
to allow internal
network access by
some external
computers.
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