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10-48  Firmware User Guide
 
Call Filtering
 
Netopia Firmware Version 5.4 suppor ts a call filtering mechanism that lets you control which packets cause 
connections to be established and which packets cause connections to be maintained (that is, to not time out 
due to inactivity). This feature is par t of the Filter Set management component of the firmware. Call filtering 
makes use of the existing sets of filter rules that can be associated with a connection.
The term 
 
connection
 
 includes both non-VPN connection profiles for which the remote network is reached 
through a switched WAN inter face, such as Analog or ISDN, and all VPN connection profiles, such as ATMP, 
PPTP, and IPsec.
The call filtering mechanism is useful if you have a time-limited type of connection. Such a connection may time 
out during a period of inactivity and may you want it to be re-established or maintained automatically for cer tain 
types of traffic.
You manage Filters and Filter Sets in the Filter Sets management screen under the System Configuration 
menus.
The Add Output Filter menu appears as follows: 
When you add (or change) an output filter, and toggle 
 
Forward
 
 to 
 
Yes
 
, a new 
 
Call Placement/Idle Reset
 
 pop-up 
menu becomes visible.
Filter Sets
System Configuration
Main
Menu
                               Add Output Filter
         Enabled:                           Yes
         Forward:                           Yes
         Source IP Address:                 0.0.0.0
         Source IP Address Mask:            0.0.0.0
         Dest. IP Address:                  0.0.0.0
         Dest. IP Address Mask:             0.0.0.0
         Protocol Type:                     ANY
         ADD THIS FILTER NOW                CANCEL
Return/Enter accepts * Tab toggles * ESC cancels.
Enter the packet specific information for this filter.