21

3

3.

Filtering Content

This chapter describes how to monitor and filter the content traveling on your network. When you

log in to the gateway (see

Log In to Your Gateway

on page

10), these tasks are grouped under

Content Filtering. This chapter includes the following sections:

•

View Denial of Service (DoS) Attack Logs

•

Limit Internet Site Access

•

Allow Unrestricted Access

•

Disable Gateway Features

Filtering Content

22

NETGEAR DOCSIS 3.0 N450 Wi-Fi Data Gateway

V

iew Denial of Service (DoS)

Attack Logs

A content filter log is a detailed record of the denial of service (DoS) attacks directed at your

network. You can set up email notification or you can view the logs on the gateway.



To receive notification of attacks by email:

1.

In the main menu, under Content Filtering, select

Logs

.

2.

Enter an email address.

This address is the full email address to which you want the gateway to send logs.

3.

Enter the SMTP server name.

Type the outgoing SMTP mail server of your ISP. If you leave this box blank, the gateway

does not send logs.

4.

Select the E-mail Alerts

Enable

check box.

5.

Click

Apply

.

6.

Perform any of the following actions:

•

To refresh the display, click

Refresh

.

•

To send the log to the contact email address, click

E-mail Log

.

•

To clear the log entries from the display, click

Clear Log

.

Filtering Content

23

NETGEAR DOCSIS 3.0 N450 Wi-Fi Data Gateway

Limit Internet Site

Access

You can establish rules to limit access to certain Internet websites in one of two ways:

•

Blocking sites that contain certain words.

•

Blocking access to certain domains.



To block access to sites containing certain words:

1.

In the main menu, under Content Filtering, select

Block Sites

.

2.

Select the Keyword Blocking

Enable

check box.

3.

In the Keyword List, enter the words you want to block.

4.

Click

Add Keyword

.



To allow a keyword that was previously blocked:

1.

Select the keyword.

2.

Click

Remove Keyword

.



To block access to certain domains:

1.

In the main menu, under Content Filtering, select

Block Sites

.

2.

Select the Domain Blocking

Enable

check box.

3.

In the Keyword List, enter the domain you want to block.

Filtering Content

24

NETGEAR DOCSIS 3.0 N450 Wi-Fi Data Gateway

4.

Click

Add Domain

.



To unblock a domain:

1.

Select the domain name.

2.

Click

Remove Domain

.

Allow Unrestricted

Access

You can specify up to three computers to have unrestricted access to the Internet.



To allow unrestricted access:

1.

In the main menu, under Content Filtering, select

Block Sites

.

2.

Select the

Allow Trusted Computer to Visit Blocked Sites

check box.

3.

Enter the MAC address of each computer.

4.

Click

Apply

.

Disable Gateway Features

You can disable the following types of gateway features:

•

Firewall features

•

Web features

•

NAT ALG status features



To disable specific firewall features:

In the main menu, under Content Filtering, select

Services

.

Firewall features appear near the top of the screen.

Filtering Content

25

NETGEAR DOCSIS 3.0 N450 Wi-Fi Data Gateway

The following table describes the fields displayed in this screen.

Table 1.

Firewall features



To disable specific web features:

In the main menu, under Content Filtering, select

Services

.

Web features appear near the middle of the screen.

To block certain web-oriented cookies, Java scripts, and pop-up windows, select the

corresponding check boxes.



To disable specific NAT ALG Status features:

In the main menu, under Content Filtering, select

Services

.

Feature

Description

Firewall

•

Enable

. The gateway performs stateful packet inspection (SPI).

•

Disable

. The gateway does not perform SPI.

IPSec Pass-Through

•

Enable

. The gateway forwards IPS traffic.

•

Disable

. The gateway blocks traffic.

PPTP Pass-Through

•

Enable

. The gateway forwards PPTP traffic.

•

Disable

. The gateway blocks PPTP traffic.

Multicast

•

Enable

. The gateway passes multicasting streams through the firewall.

•

Disable

. The gateway blocks multicasting streams.

Port Scan Detection

•

Enable

. The gateway responds to Internet-based port scans.

•

Disable

. The gateway does not respond to Internet-based port scans.

IP Flood Detection

•

Enable

. The gateway blocks malicious devices that are attempting to flood

devices.

•

Disable

. The gateway does not block malicious devices.