Q1: Local Area Network is accessible, but internet remote access is not working?
A1.: Please configure your router to have port 5000~5001 (NDVR-04) & 14337~14338 (CR04N) open in order for both video and audio of the local DVRs to transmit through the router for internet remote access.

Q2: Can I use DDNS services?
A2.: No, these systems are not designed to have DDNS support.

Q3: My ISP subscription is for dynamic IP only, is there any way these network DVRs could be used for internet remote access without having to subscribe for static IP address?
A3.: Yes, there is third party software that can be used to detect the changes in dynamic IP and send the IP changes via email and/or FTP server, software such as IPWatcer, Dynamic IP Monitor, etc.