Talos Security DR800 Series DVR User Manual - Manual (Page 61)

H.264 Network DVR
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(3) Click on "Custom Level", enter the security settings. (Figure 8-2)
Figure 8-2
ActiveX controls and plug-ins installed
The DVR requires you to install ActiveX controls to see the video stream and Internet Explorer asks if you want to install the ActiveX control.
9
Automatic prompting for ActiveX controls
9 Binary and script behaviors
9 Download unsigned ActiveX controls
9 Download signed ActiveX controls
9 Only allow approved domains to use ActiveX without prompt
9 Run ActiveX controls and plug-ins
The above categories will be "Enable", which is very important.
Note: When installing ActiveX; disable firewall and antivirus.