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Chapter 5: Configuring the Gateway
The Security Tab
ADSL2 Gateway with 4-Port Switch
• Subnet Mask. The Subnet Mask (also known as the Network Mask) determines which portion of an IP
address is the network portion, and which portion is the host portion.
• Gateway. This IP address should be the IP address of the gateway device that allows for contact between
the Gateway and the remote network or host.
• Hop Count. Hop Count is the number of hops to each node until the destination is reached (16 hops
maximum). Enter the Hop Count in the field.
• Show Routing Table. Click the Show Routing Table button to open a screen displaying how data is routed
through your LAN. For each route, the Destination IP address, Subnet Mask, Gateway, and Interface are
displayed. Click the Refresh button to update the information. Click the Close button to return to the previous
screen.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
The Security Tab

Firewall

When you click the Security tab, you will see the Firewall screen. This screen contains Filters and the option to
Block WAN Requests. Filters block specific Internet data types and block anonymous Internet requests. To add
Firewall Protection, click Enable. If you do not want Firewall Protection, click Disable.
Additional Filters
• Filter Proxy. Use of WAN proxy servers may compromise the Gateway's security. Denying Filter Proxy will
disable access to any WAN proxy servers. To enable proxy filtering, click Enabled.
• Filter Cookies. A cookie is data stored on your computer and used by Internet sites when you interact with
them. To enable cookie filtering, click Enabled.
• Filter Java Applets. Java is a programming language for websites. If you deny Java Applets, you run the risk
of not having access to Internet sites created using this programming language. To enable Java Applet
filtering, click Enabled.
• Filter ActiveX. ActiveX is a programming language for websites. If you deny ActiveX, you run the risk of not
having access to Internet sites created using this programming language. To enable ActiveX filtering, click
Enabled.
Figure 5-13: Routing Table List