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IPAC Server Administrator's Manual
10.
Antipassback
Antipassback prevents an authorized user from presenting a credential to access an area,
and then "passing back" that credential to another individual, who then uses the same
credential to access the building.
An example of antipassback is sealed labatory where two credential readers are installed,
one on an entry and one on an egress, at particular doors. Users must present their card to
enter, and also to exit the door. The Activity Log documents when individuals enter and
exit.
Another example of antipassback is a parking garage where an ingress reader is installed,
allowing users to enter an antipassback zone, and then to have the zone reset after a
certain period of time, allowing users to return if they have left the zone (driven home for
the night).
When Antipassback is enabled, and an individual enters and passes back his or her
credential to another, the unauthorized user will not be allowed to enter, because the
system recognizes that the credential has already been used to enter the building.
All Antipassback violations are recorded in the Activity Log.
NOTE:
Antipassback functionality relies on the connection between control
panels and the server. If the panels are not connected to the
appliance, Antipassback will not function.
NOTE:
Salto Door Locks are not capable of supporting anti-passback
functionality.
Antipassback settings can easily be disabled by administrators with appropriate permissions,
allowing them to control entry and exit in the case of an emergency. Additionally,
Antipassback provides an important employee management feature, as the access system
can provide information regarding how many people are within a building or access
controlled area at a specific time, as well as their identities.
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