User`s guide

Defining Filters and Firewalls
Introduction to filters
6-4 Preliminary January 30, 1998 Pipeline User’s Guide
Call filters for managing connections
Call filters are used to prevent unnecessary connections and to help the Pipeline
distinguish active traffic from “noise.” By default, any traffic to a remote site
triggers a call to that site, and any traffic across an active connection resets the
connection’s idle timer.
Note:
The idle timer is set to 120 seconds by default. If a connection is inactive
for two minutes, the idle timer expires and the Pipeline terminates the
connection.
Call filters define which packets are not considered active traffic on a particular
connection. They identify which packets should not originate a connection or
reset the idle timer. Call filters do not affect which packets are transmitted or
received across active connections.
Figure 6-2. Call filters used to prevent resetting the timer
To define which packets will not reset the idle timer or keep a connection active,
apply a call filter to a Connection or Answer profile using the following steps:
1
Open Ethernet > Connection or Answer > profile
Note:
You can apply a filter in the Answer profile only if the Profile Reqd
parameter is set to No.
2
Open the Session Options submenu.
3
Apply the call filter.
For example:
Call Filter=5
If this parameter is set to zero, the default, no filter is applied.
WAN
Data Filter