Netgear CG814M 사용자 설명서
Reference Manual for the Model CG814M Wireless Cable Modem Gateway
Protecting Your Network
4-9
1.
Select the service you would like to forward from the drop-down list of predefined
services.
services.
If the service you would like to forward is not in the predefined list, you can add a
custom service. Enter the range of ports you would like to forward and select whether
the ports are TCP, UDP or Both.
the ports are TCP, UDP or Both.
2.
Enter the IP address of the computer on your network to which you would like to
direct the inbound traffic
3.
Click Add.
4.
To access the local computer from the Internet, you must use the WAN address of your
gateway, which can be found on the Basic Settings page.
gateway, which can be found on the Basic Settings page.
•
To delete an existing rule, select its button on the left side of the table and click Delete.
Considerations for Port Forwarding
If your external IP address is assigned dynamically by your ISP, the IP address may change
periodically as the DHCP lease expires. Consider using the Dynamic DNS feature in the Advanced
menus so that external users can always find your network.
periodically as the DHCP lease expires. Consider using the Dynamic DNS feature in the Advanced
menus so that external users can always find your network.
•
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.
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 PCs must access the local server using the PCs’ local LAN address (192.168.0.XXX, by
default). Attempts by local PCs to access the server using the external WAN IP address will
fail.
default). Attempts by local PCs to access the server using the external WAN IP address will
fail.
Port Triggering
Port Triggering is an advanced feature that allows you to dynamically open inbound ports based on
outbound traffic on different ports. This is an advanced feature that can be used for gaming and
other internet applications.
outbound traffic on different ports. This is an advanced feature that can be used for gaming and
other internet applications.
Port Forwarding can typically be used to enable similar functionality, but it is static and has some
limitations. Ports will be open to traffic from the internet until the port forwarding rule is removed.
Additionally, port forwarding does not work well for some applications when your WAN IP
address is assigned by DHCP, and is changed frequently. Port Triggering opens in incoming port
temporarily and can does not require the server on the internet to track your IP address if it is
limitations. Ports will be open to traffic from the internet until the port forwarding rule is removed.
Additionally, port forwarding does not work well for some applications when your WAN IP
address is assigned by DHCP, and is changed frequently. Port Triggering opens in incoming port
temporarily and can does not require the server on the internet to track your IP address if it is