Cisco 3825 User Guide - Page 69

Con Applications and Gaming, Overview, Applications & Gaming > Port Filtering

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Configure Applications and Gaming Configure Applications and Gaming Overview 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. Applications & Gaming > Port Filtering 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. Applications and Gaming Port Filtering Page Description 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. 4021196 Rev A 69

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4021196 Rev A
69
Configure Applications and Gaming
Configure Applications and Gaming
Overview
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.
Applications & Gaming > Port Filtering
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.
Applications and Gaming Port Filtering Page Description
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.