Wireless Cable Voice Gateway Model CVG824G Reference Manual
1.From the Port Filter List
2.Select the radio box of the Day(s) you want to apply the rule.
3.Select the time of day for the rule to be in effect by either check the All Day radio box or specifying a Start Time and End Time from the
4.Click Add. The new Port Blocking rule will appear in the Outbound Rules table.
To delete an existing rule:
1.Select the rule from the Port Filter List.
2.Click Delete.
Port Forwarding
You can use port forwarding to set up a rule that directs inbound traffic for a particular service to a local server (for example, a Web server or game server) based on the destination port. This makes the server visible and available to the Internet.
Unless you set up port forwarding, the gateway prevents this type of traffic.The gateway uses Network Address Translation (NAT). NAT presents a single IP address for your network to the Internet. Outside users cannot directly address your local computers.
Note: Some residential broadband ISP accounts do not allow you to run any server 
processes (such as a Web or FTP server) from your location. Your ISP may check
for servers and may suspend your account if it discovers active services at your location. If you are unsure, refer to the acceptable use policy of your ISP.
Before setting up Port Forwarding, consider the following:
•If the IP address of the local server PC is assigned by DHCP, it may change when the PC is rebooted. To avoid this, you can assign a static IP address to your server outside the range that is assigned by DHCP, but in the same subnet as the rest of your LAN. By default, the IP addresses in the range of 192.168.0.2 through 192.168.0.9 are reserved for this.
•Local computers must access the local server using the local LAN address of the computer (192.168.0.XXX, by default). Attempts by local computers to access the server using the external WAN IP address will fail.
Remember that allowing inbound services opens holes in your firewall. Only enable those ports that are necessary for your network.
Protecting Your Network |
1.0, November 2006
