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Reference Manual for the Model Wireless ADSL Firewall Router DG834G
Managing Your Network
6-15
202-10006-05, June 2005
Enabling Remote Management
Using the Remote Management page, you can allow a user or users on the Internet to configure,
upgrade and check the status of your DG834G Wireless ADSL Firewall Router.
Configuring Remote Management
1.
Log in to the router at its default LAN address of
with its default User Name
of
admin
, default password of
password
, or using whatever User Name, Password and LAN
address you have chosen for the router.
2.
From the Advanced section of the main menu, select the Remote Management link.
3.
Select the Turn Remote Management On check box.
4.
Specify what external addresses will be allowed to access the router’s remote management.
For security, restrict access to as few external IP addresses as practical:
To allow access from any IP address on the Internet, select Everyone.
To allow access from a range of IP addresses on the Internet, select IP address range.
Enter a beginning and ending IP address to define the allowed range.
To allow access from a single IP address on the Internet, select Only this Computer.
Enter the IP address that will be allowed access.
5.
Specify the Port Number that will be used for accessing the management interface.
Web browser access normally uses the standard HTTP service port 80. For greater security,
you can change the remote management Web interface to a custom port by entering that
number in the box provided. Choose a number between 1024 and 65535, but do not use the
number of any common service port. The default is 8080, which is a common alternate for
HTTP.
6.
Click Apply to have your changes take effect.
Note:
Be sure to change the router's default password to a very secure password. The
ideal password should contain no dictionary words from any language, and should be a
mixture of letters (both upper and lower case), numbers, and symbols. Your password
can be up to 30 characters.
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Reference Manual for the Model Wireless ADSL Firewall Router DG834G
6-16
Managing Your Network
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When accessing your router from the Internet, you will type your router's WAN IP address in
your browser's Address (in IE) or Location (in Netscape) box, followed by a colon (:) and the
custom port number. For example, if your external address is 134.177.0.123 and you use port
number 8080, enter in your browser:
Note:
In this case, the http:// must be included in the address.
Page 93 / 268
Advanced Configuration
7-1
202-10006-05, June 2005
Chapter 7
Advanced Configuration
This chapter describes how to configure the advanced features of your DG834G Wireless ADSL
Firewall Router.
Configuring Advanced Security
The DG834G Wireless ADSL Firewall Router provides a variety of advanced features, such as:
Setting up a Demilitarized Zone (DMZ) Server
Connecting Automatically, as Required
Disabling Port Scan and DOS Protection
Responding to a Ping on the Internet WAN Port
MTU Size
Flexibility on configuring your LAN TCP/IP settings
Using the Router as a DHCP Server
Configuring Dynamic DNS
Configuring Static Routes
These features are discussed below.
Setting Up A Default DMZ Server
The Default DMZ Server feature is helpful when using some online games and videoconferencing
applications that are incompatible with NAT. The router is programmed to recognize some of these
applications and to work properly with them, but there are other applications that may not function
well. In some cases, one local computer can run the application properly if that computer’s IP
address is entered as the Default DMZ Server.
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Reference Manual for the Model Wireless ADSL Firewall Router DG834G
7-2
Advanced Configuration
202-10006-05, June 2005
Incoming traffic from the Internet is normally discarded by the router unless the traffic is a
response to one of your local computers or a service that you have configured in the Ports menu.
Instead of discarding this traffic, you can have it forwarded to one computer on your network. This
computer is called the Default DMZ Server.
How to Configure a Default DMZ Server
To assign a computer or server to be a Default DMZ server, follow these steps:
1.
Log in to the router at its default LAN address of
with its default User Name
of
admin
, default password of
password
, or using whatever Password and LAN address you
have chosen for the router.
2.
From the Main Menu, under Advanced, click the WAN Setup link to view the page shown in
Figure 7-1
:
Figure 7-1:
WAN Setup Page
3.
Select the Default DMZ Server check box.
4.
Type the IP address for that server.
5.
Click Apply to save your changes.
Note:
For security reasons, you should avoid using the Default DMZ Server feature.
When a computer is designated as the Default DMZ Server, it loses much of the
protection of the firewall, and is exposed to many exploits from the Internet. If
compromised, the computer can be used to attack your network.
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Reference Manual for the Model Wireless ADSL Firewall Router DG834G
Advanced Configuration
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202-10006-05, June 2005
Connect Automatically, as Required
Normally, this option should be enabled, so that an Internet connection will be made automatically,
whenever Internet-bound traffic is detected. If this causes high connection costs, you can disable
this setting.
If disabled, you must connect manually, using the sub-screen accessed from the "Connection
Status" button on the Status screen.
If you have an "Always on" connection, this setting has no effect.
Disable Port Scan and DOS Protection
The Firewall protects your LAN against Port Scans and Denial of Service (DOS) attacks. This
should be disabled only in special circumstances.
Respond to Ping on Internet WAN Port
If you want the router to respond to a 'ping' from the Internet, select the ‘Respond to Ping on
Internet WAN Port’ check box. This should only be used as a diagnostic tool, since it allows your
router to be discovered. Do not select this box unless you have a specific reason to do so.
MTU Size
The normal MTU (Maximum Transmit Unit) value for most Ethernet networks is 1500 Bytes, or
1492 Bytes for PPPoE connections. For some ISPs you may need to reduce the MTU. But this is
rarely required, and should not be done unless you are sure it is necessary for your ISP connection.
Configuring LAN IP Settings
The LAN IP Setup menu allows configuration of LAN IP services such as DHCP and RIP. These
features can be found under the Advanced heading in the Main Menu of the browser interface.
The router is shipped preconfigured to use private IP addresses on the LAN side, and to act as a
DHCP server. The router’s default LAN IP configuration is:
LAN IP addresses—192.168.0.1
Subnet mask—255.255.255.0

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