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Thanks @mat200 and @IAmATeaf . There is a document for this (link https://www.dahuasecurity.com/asset/upload/download/20180122/HDD_Compatible_list_for_Dahua_Video_Recorder_20180118_En.pdf) but it states that device with dual controller would support SAS. I think those would be pro version/high...

Hi all, I have searched google and dahua wiki page but not sure about Dahua NVR 1x, 2x and 4x (i.e DH-NVR2108) which can support SAS drive or not. Any one has ever tried to put SAS drive (3TB, 4TB, WD or HGST) on Dahua NVR? Is the drive recognised or even work? Or simply does not work at all...

If you're in HCM city, i can help you. But only for personal usage only. Actually, you can use the app on pc to setup the nvr and use mobile app to view. They support both English ang Vietnamese language

Not sure why do you want to upgrade firmware for a camera which has already supported multiple languages. From the link of seller, I believe the camera firmware is newer than the one in first post.

Even when you are success in modifying the firmware, there is no way to install it on the device. Latest firmware checks its folder by the checksum, and overall, the sign.img. So if you want to modify any file, you have to make a checksum again for that folder, and sign the firmware. As...

Yes, I turned the P2P off. I also setup a private VPN server to access to these cameras so I disable all P2P, uPNP, everything that may connects to Dahua or internet. I will try to look at which IP the camera try to connect to and get you back soon. The the strange thing is that I could not see...

I got IPC-HFW4431R-Z camera from China market, loaded it with @cor35vet firmware from topic Dahua Firmware Mod Kit + Modded Dahua Firmware And found that the camera try to connect to internet and use a lot of bandwidth (over 100Kb/s), 400MB/less than 1 hour. If I change the DNS to 1.0.0.1 then...

I got IPC-HFW4431R-Z camera from China market, loaded it with @cor35vet firmware from topic Dahua Firmware Mod Kit + Modded Dahua Firmware And found that the camera try to connect to internet and use a lot of bandwidth (over 100Kb/s), 400MB/less than 1 hour. If I change the DNS to 1.0.0.1 then...

Dahua has made data signature check for all file in its latest firmware. Not sure if we can flash the img file via console after modifying the content... Update: after modifying, flashing new firmware, device keeps rebooting :)

Update: Ah, the firmware file from dahuasecurity can be extracted OK, but the file from dahuatech is the one I get the issue below: http://download.dahuatech.com/kitDownload.php?filepath=DH_NVR4XXX-4KS2_Chn_V3.215.0000000.1.R.170902.bin WARNING Autodetected config: NVR4XXX-4KS2 Traceback (most...

Strange, I got error as below, not for missing NVR4XXX-4KS2 setting. I created this setting couple month and it worked just fine with old firmware . The new firmware (Sep 2, 2017) change from ZX to K or something else compression Update: Ah, the firmware file from dahuasecurity can be extracted...

Latest Dahua firmwares' header has been changed and the toolkit could not extract anymore. I also use binwalk/7zip but unsuccessful. @cor35vet : can you take a look at it...

Flash successfully and load with English UI :). Found that NVR call a file name contain its serial number when booting. Next time I will configure via TFTP for flashing...

When vcc and ground pins were shorted, i heard small voice of sthing like a click (or maybe my heartbeat lol), I thought nvr is bricked but it booted up again. I checked and it seemed it still could connect to camera and hdd, record video, etc... Everything seems fine. Actually, I shorted those...

Thank you @cor35vet . I have a question, if I connect VCC pin to the ground of serial port, what will happen? Do I burn sthing? Because when trying to detect the port, I accidentially connect the vcc pin to the ground (the metal pointer of multimetters is too big compared to posion of 2 pins vcc...

Ok @cor35vet, you make me change my mind. But the most important thing is that I did not know where to wire, he he. Can you show me? I suspect the 4 pins jack in white plastic?

Try to enable telnet on NVR4xxx-4ks2 but got error Internal Server Error Try to scan if NVR open port 3800, but only port 554 and 80 were opened Try to sniff if NVR connect to TFTP via ip 192.168.254.254 but got no message from NVR Only remain method is using serial cable but when I opened the...

Manage to extract, modify and build the firmware successfully, but failed to upgrade on device. Dahua does a checksum on recently firmware so that modifying firmware is not easy to achieve. Any one know how to change/bypass the checksum?

It seems Dahua uses new version of squashfs that the mod-kit could support. I took a look at the header of 2 img files of DH_NVR4XXX-4KS2 and 4K and saw that it's different. Attachments are files header comparison and config file for NVR4XXX-4KS2 which I created and used. @cor35vet: any news?

@cor35vet: Here the firmware link: DH-NVR4XXX-4KS2

It looks like the firmware Mod-kit could not extract img in new firmware. But binwalk can extract it. Maybe Dahua has changed the header of image file and it's a Non-Standard SquashFS Images. @cor35vet: pls take a look. Thanks

Can anyone make NVR4XXX-4KS2.py config(with S2) for Dahua Firmware Mod-kit in Github ? Sample Chinese firmware : DH-NVR4208HS-HDS2 (4KS2)

Hi, I just wonder how you bypass the TranslateCheckCode in Dahua IPC firmware, which file is needed to be patched and how. I'm also interested in patching :) since I have a bunch of Dahua devices

@cor35vet : Can you check if this mod works with NVR2xxx ? Your config seems support NVR4XXX+ only. I got a Chinese DH-NVR2108HS-S1, need to change to English language. Thanks,