Motorola Netopia-3000 Router Manual PDF (Setup & Configuration Guide)

Page 166 / 351 Scroll up to view Page 161 - 165

166

Packets in Netopia Firmware Version 7.6 pass through an input ﬁlter if they originate from the WAN and

through an output ﬁlter if they’re being sent out to the WAN.

The process for adding input and output ﬁlters is exactly the same. The main difference

between the two involves their reference to source and destination. From the perspective

of an input ﬁlter, your local network is the destination of the packets it checks, and the

remote network is their source. From the perspective of an output ﬁlter, your local network

is the source of the packets, and the remote network is their destination.

To add a ﬁlter, select the

Filter Set Name

to which you will add a ﬁlter, and click the

Edit

button.

Type of ﬁlter

Source means

Destination means

Input ﬁlter

The remote network

The local network

Output ﬁlter

The local network

The remote network

The

Netopia Router

input filter

output filter

LAN

WAN

packet

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167

Working with IP Filters and Filter Sets

The Filter Set page appears.

☛

Note:

There are two

Ad

d

buttons in this page, one for input ﬁlters and one for out-

put ﬁlters. In this section, you’ll learn how to add an input ﬁlter to a ﬁlter set.

Adding an output ﬁlter works exactly the same way, providing you keep the dif-

ferent source and destination perspectives in mind.

1.

To add a ﬁlter, click the

Ad

d

button under Input Rules.

The Input Rule Entry page appears.

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168

2.

If you want the ﬁlter to forward packets that match its criteria to the desti-

nation IP address, check the

Forward

checkbox.

If Forward is unchecked, packets matching the ﬁlter’s criteria will be discarded.

3.

Enter the

Source IP

address this ﬁlter will match on.

You can enter a subnet or a host address.

4.

Enter the

Source Mask

for the source IP address.

This allows you to further modify the way the ﬁlter will match on the source address.

Enter 0.0.0.0 to force the ﬁlter to match on all source IP addresses, or enter

255.255.255.255 to match the source IP address exclusively.

5.

Enter the

Destination IP

Address this ﬁlter will match on.

You can enter a subnet or a host address.

6.

Enter the

Destination Mask

for the destination IP address.

This allows you to further modify the way the ﬁlter will match on the destination

address. Enter 0.0.0.0 to force the ﬁlter to match on all destination IP addresses.

7.

If desired, you can enter a TOS and TOS Mask value.

See

“Policy-based Routing using Filtersets” on page 173

for more information.

8.

Select

Protocol

from the pull-down menu: ICMP, TCP, UDP, Any, or the

number of another IP transport protocol (see the table on

page 160

).

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169

Working with IP Filters and Filter Sets

If Protocol Type is set to TCP or UDP, the settings for port comparison will appear.

These settings only take effect if the Protocol Type is TCP or UDP.

9.

From the

Source Port Compare

pull-down menu, choose a comparison

method for the ﬁlter to use on a packet’s source port number.

Then select

Source Port

and enter the actual source port number to match on (see

the table on

page 158

).

10.

From the Destination Port Compare pull-down menu, choose a compari-

son method for the ﬁlter to use on a packet’s destination port number.

Then select

Destination Port

and enter the actual destination port number to match

on (see the table on

page 158

).

11.

When you are ﬁnished conﬁguring the ﬁlter, click the

Submit

button to

save the ﬁlter in the ﬁlter set.

Viewing ﬁlters

To display the table of input or output ﬁlters, select the

Filter Set Name

in the Filter Set

page and click the

Ad

d

or

Edit

button.

The table of ﬁlters in the ﬁltersets appears.

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170

Modifying ﬁlters

To modify a ﬁlter, select a ﬁlter from the table and click the

Edit

button. The Rule Entry

page appears. The parameters in this page are set in the same way as the ones in the orig-

inal Rule Entry page (see

“Adding ﬁlters to a ﬁlter set” on page 165

).

Deleting ﬁlters

To delete a ﬁlter, select a ﬁlter from the table and click the

Delete

button.

Moving ﬁlters

To reorganize the ﬁlters in a ﬁlter set, select a ﬁlter from the table and click the

Mo

ve Up

or

Mo

ve Do

wn

button to place the ﬁlter in the desired priority position.

Deleting a ﬁlter set

If you delete a ﬁlter set, all of the ﬁlters it contains are deleted as well. To reuse any of

these ﬁlters in another set, before deleting the current ﬁlter set you’ll have to note their

conﬁguration and then recreate them.

To delete a ﬁlter set, select the ﬁlter set from the Filter Sets list and click the

Delete

but-

ton.

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