ZyXEL Communications 100WH user manual Filter Configuration, About Filtering, Chapter

Prestige 100WH Internet Access Router

Chapter 7

Filter Configuration

About Filtering

Your Prestige uses filters to decide whether or not to allow passage of a data packet and/or to make a call over the Modem line. There are three types of filters involved:

•Incoming Data Filters

•Outgoing Data Filters

•Call Filters.

Data filters screen the data to determine if the packet should be allowed to pass. Call filters are used to determine if a call should be placed.

Outgoing packets must pass through the data filters before they encounter the call filters. Call filters are divided into two groups

•Built-in Call Filters

•User-defined Call Filters.

Your Prestige has built-in call filters that filter out administrative, e.g., RIP, packets. These built-in filters are always enabled and not accessible to the user. Your Prestige applies the built-in filters first and then the user-defined call filters if applicable, as illustrates in Figure 7-1, outgoing packet filtering process

The Prestige has a default call filter “NetBEUI_WAN” configured and enabled in your ISP remote node that prevents Windows NetBEUI packets from triggering calls. If you need to disable this filter, go to Menu 11 and delete it from the call filter sets. You can also add this default call filter to another remote node by including it in the remote node’s call filter sets.

Chapter 7 Filter Configuration 7-1