SMCD3G Cable Modem Gateway User Manual

Configuring Access Control
Configuring Your Gateway
By default, your Gateway blocks all attempts to access the LAN from the Internet. The
Access Control menu lets you configure identifying types of traffic that you want to block at
the Gateway's LAN interfaces from accessing the Internet. Your Gateway examines each
traffic type to determine whether to allow or deny it access to the Internet based on the
access control rules you define.
To access the Access Control menu, click Firewall in the menu bar and then click the
Access Control submenu in the menu bar. Figure 21 shows an example of the menu. You
can configure a maximum of 35 predefined and custom-defined filters.
Figure 21. Access Control Menu
Adding a Predefined Service to Access Control
Using the following procedure, you can select well-known services and decide whether to
allow all Internet hosts, a single Internet host, or a range of Internet hosts access to the
service.
1. In the Access Control menu, check Enable Access Control if it is not checked and click
the Apply button. The remaining fields in the menu become available.
2. Under Predefined Service Table, click the Add button. The Predefined Access Rules
menu appears (see Figure 22).
3. Complete the fields in the Predefined Access Rules menu (see Table 9). (Or click Back to
return to the Access Control menu or Cancel to cancel any selections you made.)
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SMCD3G Cable Modem Gateway User Manual