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Order of Precedence for Rules

As you define new rules, they are added to the tables in the Firewall Rules screen, as shown:

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 might 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 RFC 1700, “Assigned Numbers.” Service numbers for other

applications are typically chosen from the range 1024 to 65535 by the authors of the application.

Although the router already holds a list of many service port numbers, you are not limited to these

choices. Use the following procedure to define your own services.

Figure 3-7

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Defining Services

To define a service:

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.

Under the Content Filtering heading, select Services to display this screen:

•

To create a new service, click

Add Custom Service

.

•

To edit an existing service, select its button on the left side of the table, and then click

Edit

Service

.

•

To delete an existing service, select its button on the left side of the table, and then click

Delete Service

.

3.

Use the screen shown in the following figure to define or edit a service.

4.

Click

Apply

to save your changes.

Setting Times and Scheduling Firewall Services

The router uses network time protocol (NTP) to obtain the current time and date from one of

several network time servers on the Internet.

Figure 3-8

Figure 3-9

3G Broadband Wireless Router MBR624GU User Manual

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Setting Your Time Zone

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.

On the main menu, select Schedule to display the Schedule screen:

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.

If your time zone is currently in daylight savings time, select the

Adjust for daylight savings

time

check box.

4.

The router has a list of NETGEAR NTP servers. If you prefer to use a particular NTP server as

the primary server, enter its IP address in the

Use this NTP Server

field.

5.

Click

Apply

to save your settings.

Figure 3-10

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 causes 1 hour to be added to the

standard time.

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Scheduling Firewall Services

If you enabled services blocking in the Block Services screen or port forwarding in the Ports

screen, 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.

2.

On the main menu, select the Schedule. The Schedule screen appears.

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, fill in the

Start Blocking

and

End Blocking

fields.

4.

Enter the values in 24-hour time format. For example, 10:30 a.m. would be 10 hours and 30

minutes, and 10:30 p.m. 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.

5.

Click

Apply

to save your changes.

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