I'm going to set up a new security system in my house. I was planning on purchasing this Dahua NVR: DH-NVR5216 
  
Then I saw this thread about Synology. 
I own this Synology NAS: DS213j 
  
Can I just purchase cameras, like these: 
HDBW3300, HFW5100C, and SD40212S-HN 
and control them from my Synology? Or do I need a NVR also? 
  
Thanks for any advice anyone could give in setting up a Dahua 16ch security system in my hope with a Synology NAS.