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Page 46 NB1300Plus4 ADSL Modem
Security
Configuring the Firewall
The NB1300Plus4W has an inbuilt firewall. A firewall is a device which prevents unauthorized
users from gaining access to your computer network. This tutorial will show you how to
configure the advanced options of this firewall. Configuration of these options is only
recommended for advanced users. The NB1300plus4W defaults include a moderate level of
security and usually the firewall will only require further configuration if a higher or lower
security level is required.
Note: You can click on the Firewall link at the top of the page to return to the main firewall
configuration screen at any time.
Protection Policy - allows you to enable the firewall to check for different types of unauthorized
access - when you've finished with this page, click on Submit.
Hacker Log - allows you to manage logging preferences for the firewall.
Syslog event - section allows you to determine which events are logged.
Syslog Operation - section allows you to determine the properties of the log, and where you
want to send the logs to. You can send them via email, or you can send
them to a computer on your LAN. Note that if you choose to send the
logs to a computer on your LAN, that computer must be running a
suitable Syslog application.
When you've finished configuring these options, click on "submit".
Service Filtering
The service filtering setting allows you to filter incoming connections from your external
network. Checking the box will block incoming traffic for that protocol. When you've finished,
click on Submit to save the settings.
Remember if you've changed any settings, you must save them to flash by clicking on Save
Firewall Configuration at the bottom of the Firewall Configuration screen. Then you'll need to
press Save Settings and Reboot on the side menu, then clicking "Save & Reboot" in the next page
displayed.