Channel Vision DVR-N - Manual (Page 6)

You may also use an external IP, as long as your port is forwarded.
For example, Channel Vision’s DVR display model is 68.165.38.221.
It is an external IP Address.
Enter IP Address, and Port number. Click Connect.
When prompted for password, enter password. Factory Default is 8 ‘1s’ all in a row
for master (11111111) or 22222222 for a non-administrator password.
Shown is an internal IP. (192.168.1.122) The Port is 5401