What information of the ND/NV-Series NVR should I provide to contact technical support for help?

Please provide the following information while contacting technical support for help:

1. Model name, MAC address, Firmware version and Device pack version.
   How to know the MAC address, model name, firmware version and device pack version of the ND/NV-Series NVR(Linux-based)?
2. Problem description.
3. Snapshots or video clips to show the problem.
4. Date and time when the problem happened.
5. NVR configuration file with the password of the admin account.
   How to get the configuration file of the ND/NV-Series NVR(Linux-based)?
6. Logs.(Debug log/Archive log/System log/Recording log/User log/Error log)
   How to collect logs for Linux-based NVR and provide to VIVOTEK support team?
7. Information of the added camera.(Model name/MAC address/Firmware version)
8. Enable remote access.(If VIVOTEK support engineer needs to connect NVR)
   How to export debug logs and enable remote access function from ND/NV-Series NVR(Linux-based)?

We might need the following information, but they are not compulsory:

1. Public IP (with port if any).
2. Port forwarding for FTP port(port 21),SSH port(22), telnet port (port 23).
3. Reproducing steps/ history.
4. HDD model name and storage capacity.