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51
D-Link DIR-835 User Manual
Section 3 - Configuration
The DIR-835 can be configured as a virtual server so that remote users accessing Web or FTP services via the public IP address
can be automatically redirected to local servers in the LAN (Local Area Network).
The DIR-835 firewall feature filters out unrecognized packets to protect your LAN network so all computers networked with
the DIR-835 are invisible to the outside world. If you wish, you can make some of the LAN computers accessible from the
Internet by enabling Virtual Server. Depending on the requested service, the DIR-835 redirects the external service request to
the appropriate server within the LAN network.
The DIR-835 is also capable of port-redirection meaning incoming traffic to a particular port may be redirected to a different
port on the server computer.
Each virtual service that is created will be listed at the bottom of the screen in the Virtual Servers List. There are pre-defined
virtual services already in the table. You may use them by enabling them and assigning the server IP to use that particular
virtual service.
For a list of ports for common applications, please visit
http://support±dlink±com/faq/view±asp?prod_id=1191
.
Virtual Server
Advanced
Page 57 / 139
52
D-Link DIR-835 User Manual
Section 3 - Configuration
This will allow you to open a single port. If you would like to open a range of ports, refer to the next page.
Enter a name for the rule or select an application
from the drop-down menu. Select an application
and click
<<
to populate the fields.
Enter the IP address of the computer on your local
network that you want to allow the incoming
service to. If your computer is receiving an IP
address automatically from the router (DHCP), you
computer will be listed in the “Computer Name”
drop-down menu. Select your computer and click
<<
.
Enter the port that you want to open next to Private
Port and Public Port. The private and public ports
are usually the same. The public port is the port
seen from the Internet side, and the private port
is the port being used by the application on the
computer within your local network.
Select
TCP
,
UDP
, or
Both.
from the drop-down
menu.
The schedule of time when the Virtual Server Rule
will be enabled. The schedule may be set to Always,
which will allow the particular service to always be
enabled. You can create your own times in the
Tools
>
Schedules
section.
Select
Allow. All
(most common) or a created
Inbound filter. You may create your own inbound
filters in the
Advanced.>.Inbound.Filter
page.
Name:
IP Address:
Private Port/
Public Port:
Protocol Type:
Schedule:
Inbound Filter:
Page 58 / 139
53
D-Link DIR-835 User Manual
Section 3 - Configuration
This will allow you to open a single port or a range of ports.
Port Forwarding
Enter a name for the rule or select an application
from the drop-down menu. Select an application
and click
<<
to populate the fields.
Enter the IP address of the computer on your local
network that you want to allow the incoming service
to. If your computer is receiving an IP address
automatically from the router (DHCP), you computer
will be listed in the “Computer Name” drop-down
menu. Select your computer and click
<<
.
Enter the TCP and/or UDP port or ports that you
want to open. You can enter a single port or a range
of ports. Separate ports with a common.
Example: 24,1009,3000-4000
The schedule of time when the Virtual Server Rule
will be enabled. The schedule may be set to Always,
which will allow the particular service to always be
enabled. You can create your own times in the
Tools
>
Schedules
section.
Select
Allow. All
(most common) or a created
Inbound filter. You may create your own inbound
filters in the
Advanced.>.Inbound.Filter
page.
Name:
IP Address:
TCP/UDP:
Schedule:
Inbound Filter:
Page 59 / 139
54
D-Link DIR-835 User Manual
Section 3 - Configuration
Enter a name for the rule. You may select a
pre-defined application from the drop-down menu
and click
<<
.
This is the port used to trigger the application. It
can be either a single port or a range of ports.
Select the protocol of the trigger port (TCP, UDP,
or Both).
This is the port number on the Internet side that
will be used to access the application. You may
define a single port or a range of ports. You can use
a comma to add multiple ports or port ranges.
Select the protocol of the firewall port (TCP, UDP,
or Both).
The schedule of time when the Application Rule
will be enabled. The schedule may be set to Always,
which will allow the particular service to always
be enabled. You can create your own times in the
Tools
>
Schedules
section.
Name:
Trigger:
Traffic Type:
Firewall:
Traffic Type:
Schedule:
Application Rules
Some applications require multiple connections, such as Internet gaming, video conferencing, Internet telephony and others.
These applications have difficulties working through NAT (Network Address Translation). Special Applications makes some of
these applications work with the DIR-835. If you need to run applications that require multiple connections, specify the port
normally associated with an application in the “Trigger Port” field, select the protocol type as TCP or UDP, then enter the firewall
(public) ports associated with the trigger port to open them for inbound traffic.
The DIR-835 provides some predefined applications in the table on the bottom of the web page. Select the application you
want to use and enable it.
Page 60 / 139
55
D-Link DIR-835 User Manual
Section 3 - Configuration
QoS Engine
This option is disabled by default. Enable this option for
better performance and experience with online games and
other interactive applications, such as VoIP.
This option is enabled by default when the QoS Engine
option is enabled. This option will allow your router to
automatically determine the uplink speed of your Internet
connection.
This displays the detected uplink speed.
The speed at which data can be transferred from the router
to your ISP. This is determined by your ISP. ISP’s often speed
as a download/upload pair. For example, 1.5Mbits/284Kbits.
Using this example, you would enter 284. Alternatively you
can test your uplink speed with a service such as www.
dslreports.com.
By default, the router automatically determines whether
the underlying connection is an xDSL/Frame-relay network
or some other connection type (such as cable modem or
Ethernet), and it displays the result as Detected xDSL or
Frame Relay Network. If you have an unusual network connection in which you are actually connected via xDSL but for which you
configure either “Static” or “DHCP” in the Internet settings, setting this option to xDSL or Other Frame Relay Network ensures that
the router will recognize that it needs to shape traffic slightly differently in order to give the best performance. Choosing xDSL or
Other Frame Relay Network causes the measured uplink speed to be reported slightly lower than before on such connections, but
gives much better results.
When Connection Type is set to automatic, the automatically detected connection type is displayed here.
This option is disabled by default. Enable this option for better performance and experience with online games and other interactive
applications, such as VoIP.
Enable Traffic
Shaping:
Automatic Uplink
Speed:
Measured Uplink
Speed:
Manual Uplink
Speed:
Connection Type:
Detected Network
Type:
The QoS Engine option helps improve your network gaming performance by prioritizing applications. By default the QoS Engine settings are
disabled and application priority is not classified automatically.

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