Use Hydra. Select the password for the DVR the port 23. Login as root. The password generation set from 2 to 6. Small symbols and numbers. Issued 2 billion possible choices. It is unrealistically long considering that in a minute going on 200 attempts. Are these not long passwords are chosen so long? As I understand it, is not dependent on the speed of the processor. Are there other faster ways to crack telnet?