HI, 
  
  Thanks for this topic.  I have several Dahua IPC-HFW4300S-V2 cameras.  Recently I ordered a few more and had trouble with the scheduled snap shot mode.  The cameras were set up to save a snapshot every 5 seconds to a FTP server but would not restart sending snapshots after a power down unless I re-entered the schedule after setting the schedule to default.  This happened on both serial numbered cameras starting with PZC4L and 1E017. . 
  
  The PZC4L would only accept: 
DH_IPC-HX5(4)XXX_Eng_N_Stream3_V2.420.0000.0.R.20140419 and it fixed the problem. 
  
  The 1E017 would only accept: 
General_IPC-4300S_Stream3_V2.420.0002.0.R.20140621_a and it fixed the problem. 
  
I used the Web interface to change the firmware to an older version. 
  
I found the firmwares at the link listed earlier in this topic.  
  
Thanks a bunch for listing the firmware.  Just thought I'd pass this along.  I spent a fair amount of time trying to find firmware that would load into the respective serial numbered cameras.