IBM Proventia Network Enterprise Scanner User Manual page 85

Scan Control policy
Scan window and
refresh cycle
examples
IBM Proventia Network Enterprise Scanner User Guide, Version 1.3
You cannot configure refresh cycles or scan windows for ad hoc scans because they are not
included in the ad hoc Scan Control policy. Table 30 describes how refresh cycles and scan
windows from the background Scan control policy affect ad hoc scans:
Option from Background
Scan Control Policy
Scan Windows
Refresh cycles
Table 30: Ad hoc Scan Control policy
Assume the following:
Your scanning refresh cycle is every two days.
●
Scanning windows run from 8:00 P.M. until midnight and from 1:00 A.M. until
●
4:00 A.M. each day.
Consider the following cases:
At 11:00 P.M. on the...
first night of a refresh cycle
second night of a refresh cycle
Table 31: Examples of scan windows and refresh cycles with ad hoc scans
How Policies Apply to Ad Hoc and Background Scans
Impact on Ad Hoc Scans
You can choose whether to run an ad hoc scan only during the
open scan windows defined for background scans and to pause
when the windows close.
Ad hoc scans are never bound by the refresh cycles that apply to
background scans. Ad hoc scans continue to scan until they finish
or until you stop them. Ad hoc scans pause when scan windows
close if you choose the option to run the scans only during open
scan windows.
You start an ad hoc scan that takes three hours. The
scan runs from 11:00 P.M. until midnight, and then...
the scan runs from 1:00 A.M. until 3:00 A.M. on the second
day of the same refresh cycle.
the scan runs from 1:00 A.M. until 3:00 A.M. on the first day
of the next refresh cycle.
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