N450 WiFi Cable Modem Router Model N450/CG3000Dv2
A login screen displays.
2.Enter the modem router user name and password.
The default user name is admin. The default password is password. The user name and password are
The modem router main menu displays.
3.In the main menu, under Advanced, select Port Blocking. The Port Blocking screen displays.
4.Click the Reset button.
The Add Custom Service table is cleared, or the radio button you selected from the Active Filters table is unselected.
Port Forwarding
A firewall has default rules for inbound traffic (WAN to LAN) and for outbound traffic. Port forwarding affects the inbound rules. These rules restrict access from outsiders. By default, the modem router blocks access from outside except for responses to requests from the LAN side. You can use port forwarding to add rules to specify exceptions to the default rule.
Because the modem router uses Network Address Translation (NAT), your network presents only one IP address to the Internet, and outside users cannot directly address any of your local computers. However, by defining an inbound rule you can make a local server (for example, a web server or game server) or computer visible and available to the Internet. The rule tells the modem router to direct inbound traffic for a particular service to one local server or computer based on the destination port number. Directing traffic is also known as port forwarding.
Some residential broadband ISPs do not allow you to run server processes (such as a web or FTP server) from your location. Your ISP might check for servers and suspend your account if it finds active services at your location. See the ISP’s Acceptable Use policy.
Pay attention to the following considerations before configuring port forwarding:
•If DHCP assigns the IP address of the local server computer, the address might change when the computer is rebooted. To keep the address from changing, you can assign a static IP address to your server outside the range that DHCP assigns, but in the same
Advanced Settings
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