Intellinet Network Solutions 523967 - Manual (Page 97)

3-3 Firewall
Besides the NAT feature, this router also provides firewall functionality
to block malicious intruders from accessing the computers on your local
network.
The firewall is enabled or disabled in the 'Firewall' menu of the Web
management interface. The screen looks like this:
Select 'Enable' or 'Disable' to enable or disable the firewall function and
click 'Apply' to save the settings.
Click 'Continue' to go back to the previous setup menu and to continue
with the router setup. Click 'Apply' to reboot the router so the settings
will take effect. Please wait for about 30 seconds while the router is
rebooting.