![background image](http://html1.mh-extra.com/html/dahua-technology/asi1212d/asi1212d_quick-install-manual_3204413017.webp)
17
Anti-passback can be used to prevent users from passing their card back to a second user or tailgating behing another user when
exiting an area (if tailgating, the user will be unable to regain access through the entrance as they will still be logged as in the area
by the system).
To confi gure anti-passback follow the steps below:
From the dropdown menu, select
Anti Passback.
Select the access menu icon.
Click the
Add
button.
Select a controller from the dropdown list & enter a reference name.
Select the anti-passback confi guration from the available options, click
OK
to save and apply the setting.
Reader 1 & 2 Antipass
Reader 1 enter, Reader 2 exit.
Reader 3 & 4 Antipass
Reader 3 enter, Reader 4 exit.
Reader 1,3 & 2,4 Antipass
Readers 1 & 3 enter, Readers 2 & 4 exit.
Reader 1,3 & 2,4 Antipass
Readers 1 & 3 enter, Readers 2 & 4 exit.
Reader 1 & 2,3 Antipass
Reader 1 enter, Readers 2 & 3 exit.
Reader 1 & 2,3,4 Antipass
Reader 1 enter, Readers 2, 3 & 4 exit.
Anti-Passback