Hi, 
  
I know pretty much nothing about networking, network cameras, etc. 
  
I have an HFW-4300s that was completely unresponsive & dropped by my NVR.  When connected to my LAN, I could see the MAC address and IP, but could not access the camera via web browser, or log in with the config tool. 
  
I was able to upgrade the camera using the config tool through port 3800 with the .bin file I found here:  
  
http://www.dh-vision.com/main/firmware/IPC/HX5%284%29XXX/General_IPC-HX5%284%29XXX_Eng_N_Stream3_V2.420.0000.0.R.20140419/ 
  
This is the upgrade file for an English NTSC camera. 
  
After upgrading, the camera became responsive again, and now seems to be functioning properly. 
  
I tried to download this .bin file from a link posted earlier in this thread, but my download of that file was corrupted somehow, and the upgrade failed. 
  
I probably would not have been able to get this camera working again without reading this thread, thank you all.