[allovernow]

That's an excellent question. I personally want something simpler - 4-8 CCTV cameras on a drive that gets automatically backed up to a remote server of my choosing. I suppose the only thing stopping me from doing it in Linux is getting CCTV output to the drive.

[trog]

Probably worth checking out Zoneminder: http://www.zoneminder.com/

[cameron_b]

Try reshaping that question into "recording ONVIF streams to disk" as the task for the computer instead of the cameras doing the work.