Gateway DPC3925 Manual De Usuario

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4021192 Rev A 

 

Most well-known Internet applications are supported by Application Layer 
Gateways (ALGs). ALGs automatically adjust the gateway firewall to allow data to 
pass without making any custom settings. We recommend that you test your 
application before making changes in this section. 

Use this window to configure transmission control protocol (TCP) and user 
datagram protocol (UDP) port filters. These filters prevent a range of TCP/UDP 
ports from accessing the Internet. You can also prevent PCs from sending outgoing 
TCP/UDP traffic to the WAN on specific IP port numbers. This filter is not IP 
address- or MAC address- specific. The system blocks the specified port ranges for 
all PCs. 

Select the Port Filtering tab to open the Applications & Gaming Port Filtering page. 

 

Use the descriptions and instructions in the following table to configure the port 
filtering for applications and gaming features used on your residential gateway. 
Click the Enable checkbox to enable port forwarding for the relevant application. 
After you make your selections, click Save Settings to apply your changes or Cancel 
Changes to cancel.