With, the dlink is capable of detecting incidents such as redirection, blocking or de-focusing, or even spray paint.
To enabletampering detection:
Step 1: Log into the web-based configuration of the D-Link camera.
Step 2: Click on Setup icon on the top left corner.
Step 3: Go to Event Management -> Tamper Detection
Step 4: Check the box for Enable camera tampering detection.
Step 5: Enter the tamper trigger duration (10 sec. ~ 10 min.). The tamper alarm will be triggered only when the tampering factor (the difference between current frame and pre-saved background) exceeds the trigger threshold.
Step 6: Click Save button to save the new settings.