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Manage the Firewall and Secure Your Network
71
AC1900, N900, and N450 WiFi
Cable Data Gateways
Change a Schedule
You can change the settings for a schedule.
To change the settings for a schedule:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Security > Schedule
.
The Schedule screen displays.
6.
Select the radio button next to the schedule that you want to change.
7.
Click the
Edit
button.
The Schedule screen adjusts.
8.
Change the settings for the schedule.
9.
Click the
Apply
button.
Your changes are saved and the schedule is added to the Schedule Table.
10.
To display the Schedule Table, click the
Cancel
button.
Remove a Schedule
If you no longer need a schedule, you can remove it.
To remove a schedule:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Security > Schedule
.
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Manage the Firewall and Secure Your Network
72
AC1900, N900, and N450 WiFi
Cable Data Gateways
The Schedule screen displays.
6.
Select the radio button next to the schedule that you want to remove.
7.
Click the
Delete
button.
The schedule is removed from the table.
Set Up Security Event Email Notification
To receive logs and alerts by email about websites that users accessed, attempts to access
blocked sites, cable data gateway operation, DoS attacks and port scans, WiFi access, and
other information, provide your email information on the E-mail screen, and specify how often
you want to receive logs and alerts.
To set up email notifications:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Security >
E-mail
.
The E-mail screen displays.
Page 73 / 168
Manage the Firewall and Secure Your Network
73
AC1900, N900, and N450 WiFi
Cable Data Gateways
6.
Select the
Turn E-mail Notification On
check box.
7.
In the
Your Outgoing Mail Server
field, enter the name of your cable service provider’s
outgoing (SMTP) mail server (such as mail.myISP.com).
You might be able to find this information on the configuration screen of your email
program or by contacting your cable service provider. If you leave this field blank, log and
alert messages are not sent.
8.
In the
Send to This E-mail Address
field, enter the email address to which logs and alerts
are sent.
This email address is also used for the From address. If you leave this field blank, log and
alert messages are not sent.
9.
If your outgoing email server requires authentication, set up the authentication:
a.
Select the
My Mail Server requires authentication
check box.
b.
Complete the
User Name
and
Password
fields for the outgoing email server.
10.
If you want alerts to be sent immediately, select the
Send Alerts Immediately
check box.
Email alerts are sent immediately when someone attempts to visit a blocked site.
11.
To set up a schedule for logs to be sent, specify the following settings:
a.
Select an option from the
Send logs according to this schedule
menu:
•
When log is full
•
Hourly
•
Daily
•
Weekly
•
None
b.
If you select
Daily
or
Weekly
, select the time from the
Day
menu and select the
a.m.
or
p.m.
radio button.
c.
If you select
Weekly
, also select the day from the
Day
menu.
Logs are sent automatically. If the log fills before the specified time, the log is emailed.
After the log is sent, the log is cleared from the memory of the cable data gateway. If the
cable data gateway cannot email the log file, the log buffer might fill. In this case, the
cable data gateway overwrites the log and discards its contents.
12.
Click the
Apply
button.
Your settings are saved.
Manage Firewall, Web, and NAT ALG Security
The built-in firewall of the cable data gateway supports multiple features, all of which are
enabled by default. You can disable some or all of these firewall features. As an option, you
can also enable web features, which are disabled by default. The Application Level Gateway
(ALG) is enabled by default to optimize Network Address Translation (NAT). You can disable
some or all of the ALG NAT traversal filters.
Page 74 / 168
Manage the Firewall and Secure Your Network
74
AC1900, N900, and N450 WiFi
Cable Data Gateways
To manage firewall, web, and NAT ALG features:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Security >
Services
.
The Services screen displays.
6.
Customize the settings as described in the following table.
Feature
Description
Firewall Features
These features are enabled by default. To disable a feature, clear the associated
Enable
check box.
Firewall Features
If firewall features are enabled, the cable data gateway performs stateful
packet inspection (SPI) and protects against denial of service (DoS)
attacks. If firewall features are disabled, the cable data gateway does not
perform SPI and does not provide DoS protection.
Note:
Best practise is to keep firewall features enabled.
Page 75 / 168
Manage the Firewall and Secure Your Network
75
AC1900, N900, and N450 WiFi
Cable Data Gateways
Ipsec PassThrough
If IPSec pass-through is enabled, IPSec traffic is forwarded. If it is disabled,
IPSec traffic is blocked.
PPTP PassThrough
If PPTP pass-through is enabled, PPTP traffic is forwarded. If it is disabled,
PPTP traffic is blocked.
Multicast
If multicast is enabled, the cable data gateway passes multicasting streams
through the firewall. If it is disabled, multicast streams are blocked.
Port Scan Detection
If port scan detection is enabled, the cable data gateway responds to
Internet-based port scans. If it is disabled, the cable data gateway blocks
port scans.
Note:
Best practise is to keep port scan detection enabled.
IP Flood Detection
If IP flood detection is enabled, the cable data gateway blocks devices
(usually malicious devices) that are attempting to flood devices. If it is
disabled, flooding is not blocked.
Note:
Best practise is to keep IP flood detection enabled.
Web Features
These features are disabled by default. To enable a feature, select the associated
Enable
check box.
Filter Proxy
If the proxy filter is enabled, the HTTP proxy is blocked and you can
connect to the web only directly. That is, you cannot connect to the web
through a proxy server. If the proxy filter is disabled, you can connect to the
web through a proxy server.
Filter Cookies
If the cookie filter is enabled, websites cannot deposit cookies. If it is
disabled, websites can deposit cookies.
Filter Java Applets
If the Java applets filter is enabled, websites cannot use Java applets. If it is
disabled, websites can use Java applets.
Filter ActiveX
If the ActiveX filter is enabled, websites cannot use ActiveX. If it is disabled,
websites can use ActiveX.
Filter Popup Windows
If the pop-up filter is enabled, websites cannot use pop-up screens. If it is
disabled, websites can use pop-up screens.
Block Fragmented IP
Packets
If the fragmented IP packet filter is enabled, you can download only
complete (unfragmented) IP packets. If it is disabled, you can download
fragmented IP packets.
Feature
Description

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