ZyXEL P-314Plus User Guide - Page 107
Filter Configuration, About Filtering
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Prestige 314 PLUS Broadband Sharing Gateway with 4-Port Switch Chapter 7 Filter Configuration This chapter shows you how to create and apply filter(s). 7.1 About Filtering Your Prestige uses filters to decide whether to allow passage of a data packet and/or to make a call. There are two types of filter applications: data filtering and call filtering. Filters are subdivided into device and protocol filters, which are discussed later. Data filtering screens the data to determine if the packet should be allowed to pass. Data filters are divided into incoming and outgoing filters, depending on the direction of the packet relative to a port. Data filtering can be applied on either the WAN side or the Ethernet side. Call filtering is used to determine if a packet should be allowed to trigger a call. Remote node call filtering is only applicable when using PPTP or PPPoE encapsulation (see Figure 5-7). Outgoing packets must undergo data filtering before they encounter call filtering as shown in the following figure. Filter Configuration 7-1