Open OpenWebif configuration:

HTTP port - don`t use the default port 80. Change this immediately and close this port in the router.
Enable Authentication for streaming - default is no, change it to yes
Disable remote access for user root - default is no, change it to yes
Streaming port - don`t use the default port 8001. Change this immediately and close this port in the router.

Telnet / ssh to your box, paste in this command then press enter:

adduser admin -h /dev/null -H -s /bin/false -G root
You will be prompted for a new password. Enter your password x2.