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Reference Manual for the Model Wireless ADSL Firewall Router DG834G
Protecting Your Network
5-11
202-10006-05, June 2005
WAN Users
These settings determine which packets are covered by the rule, based on their destination
WAN IP address. Select the desired option:
Any — all IP addresses are covered by this rule.
Address range —if this option is selected, you must enter the Start and Finish fields.
Single address — enter the required address in the Start field.
Log
You can select whether the traffic will be logged. The choices are:
Never — no log entries will be made for this service.
Always — any traffic for this service type will be logged.
Match — traffic of this type that matches the parameters and action will be logged.
Not match — traffic of this type that does not match the parameters and action will be
logged.
Order of Precedence for Rules
As you define new rules, they are added to the tables in the Rules menu, as shown in
Figure 5-8
:
Figure 5-8:
Rules table with examples
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Reference Manual for the Model Wireless ADSL Firewall Router DG834G
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Protecting Your Network
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For any traffic attempting to pass through the firewall, the packet information is subjected to the
rules in the order shown in the Rules Table, beginning at the top and proceeding to the default rules
at the bottom. In some cases, the order of precedence of two or more rules may be important in
determining the disposition of a packet. The Move button allows you to relocate a defined rule to a
new position in the table.
Services
Services are functions performed by server computers at the request of client computers. For
example, Web servers serve Web pages, time servers serve time and date information, and game
hosts serve data about other players’ moves. When a computer on the Internet sends a request for
service to a server computer, the requested service is identified by a service or port number. This
number appears as the destination port number in the transmitted IP packets. For example, a packet
that is sent with destination port number 80 is an HTTP (Web server) request.
The service numbers for many common protocols are defined by the Internet Engineering Task
Force (IETF) and published in RFC1700, “Assigned Numbers.” Service numbers for other
applications are typically chosen from the range 1024 to 65535 by the authors of the application.
Although the DG834G already holds a list of many service port numbers, you are not limited to
these choices. Use the procedure below to create your own service definitions.
How to Define Services
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.
Select the Services link of the Security menu to display the Services menu shown in
Figure 5-9
:
Figure 5-9:
Services menu
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Reference Manual for the Model Wireless ADSL Firewall Router DG834G
Protecting Your Network
5-13
202-10006-05, June 2005
To create a new Service, click the Add Custom Service button.
To edit an existing Service, select its button on the left side of the table and click Edit
Service.
To delete an existing Service, select its button on the left side of the table and click Delete
Service.
3.
Use the page shown below to define or edit a service.
Figure 5-10:
Add Services menu
4.
Click Apply to save your changes.
Setting Times and Scheduling Firewall Services
The DG834G wireless router uses the Network Time Protocol (NTP) to obtain the current time and
date from one of several Network Time Servers on the Internet.
How to Set Your Time Zone
In order to localize the time for your log entries, you must specify your Time Zone:
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.
Select the Schedule link of the Security menu to display menu shown below.
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Reference Manual for the Model Wireless ADSL Firewall Router DG834G
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Figure 5-11:
Schedule Services menu
3.
Select your Time Zone. This setting will be used for the blocking schedule according to your
local time zone and for time-stamping log entries.
Select the Adjust for daylight savings time check box if your time zone is currently in daylight
savings time.
Note:
If your region uses Daylight Savings Time, you must manually select Adjust for
Daylight Savings Time on the first day of Daylight Savings Time, and clear it at the end.
Enabling Daylight Savings Time will cause one hour to be added to the standard time.
4.
The router has a list of NETGEAR NTP servers. If you would prefer to use a particular NTP
server as the primary server, enter its IP address under Use this NTP Server.
5.
Click Apply to save your settings.
How to Schedule Firewall Services
If you enabled services blocking in the Block Services menu or Port forwarding in the Ports menu,
you can set up a schedule for when blocking occurs or when access is not restricted.
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.
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Reference Manual for the Model Wireless ADSL Firewall Router DG834G
Protecting Your Network
5-15
202-10006-05, June 2005
2.
Select the Schedule link of the Security menu to display menu shown above in the
Schedule
Services menu
.
3.
To block Internet services based on a schedule, select Every Day or select one or more days. If
you want to limit access completely for the selected days, select All Day. Otherwise, to limit
access during certain times for the selected days, enter Start Blocking and End Blocking times.
Note:
Enter the values in 24-hour time format. For example, 10:30 am would be 10 hours and
30 minutes and 10:30 pm would be 22 hours and 30 minutes. If you set the start time after the
end time, the schedule will be effective through midnight the next day.
4.
Click Apply to save your changes.

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