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Firmware

3306222_General_SD-Hertz_MultiLang_PN_V2.811.0000018.0.R.250726.zip

Dahua firmware released Jul 26, 2025. May work with 51 devices, including PTZ-NT2000HB-0600-A, PTZ-NT2000HB-0600-B, PTZ-NT4000HB-0600-A.

Released
Jul 26, 2025
Version
V2.811.0000018.0.R
Size
26.3 MB
Hardware
51 devices

Download

Download firmware

Permanent copy on the Internet Archive (item page)

MD5
a4efd318f34ddf927d0815880fbabd3d
SHA-256
9d38a6c790e79b80c70fe26587074ab2aded4c372fcc205a6ca0470545f42d61

Where it's published

Compatible hardware

Hardware IDs this firmware's installer accepts (51 devices).

Where these IDs come from
  • hwid in General_SD-Hertz_MultiLang_PN_V2.811.0000018.0.R.250726.bin: the device's own hardware check list, 51 IDs
  • Install in General_SD-Hertz_MultiLang_PN_V2.811.0000018.0.R.250726.bin: the installer's device list (board families), 1 ID, vendor General (not counted: a more specific list exists)
  • check.img in General_SD-Hertz_MultiLang_PN_V2.811.0000018.0.R.250726.bin: the device's own hardware check list, 51 IDs

Technical details

Read from inside the firmware (zip archive).

SoC
SigmaStar SSC335DE
Architecture
arm
OEM build
General
Kernel
Linux 4.9.84
Bootloader
U-Boot 2010.06-svn13133
Flash
128.0 MB
Image dates
Jul 26, 2025
Security
Signed, not encrypted, security baseline V12.4
Language & video
English by default · 4 languages · PAL
Supported languages (4)

English, Arabic, SpanishEU, Thai

Flash layout: 20 partitions, 6 written by this firmware

From the firmware's partition table (partitionV2.txt).

PartitionStartEndSizeImageFilesystemBuilt
mini-Boot0x00x4000004.0 MBnot written——
U-Boot0x5000000x6000001.0 MBdhboot.bin.img—2025-07-26
hwid0x6000000x7000001.0 MBnot written——
updateflag0x7000000x8000001.0 MBnot written——
dgs0x8000000x9000001.0 MBnot written——
partition(ro)0x9000000xa000001.0 MBpartition-x.cramfs.imgcramfs2025-07-26
lens0xa000000xb000001.0 MBnot written——
syslog0xb000000xf000004.0 MBnot writtenubi—
config0xf000000x13000004.0 MBnot writtenubi—
backup0x13000000x17000004.0 MBnot writtenubi—
devconfig0x17000000x1b000004.0 MBnot writtenubi—
Kernel0x21000000x25000004.0 MBkernel.img—2025-07-26
romfs(ro)0x25000000x410000028.0 MBromfs-x.squashfs.imgsquashfs2025-07-26
web(ro)0x41000000x4d0000012.0 MBweb-x.squashfs.imgsquashfs2025-07-26
product(ro)0x4d000000x50000003.0 MBpd-x.squashfs.imgsquashfs2025-07-26
backpart0x50000000x51000001.0 MBnot written——
backKernel0x51000000x55000004.0 MBnot written——
backromfs0x55000000x710000028.0 MBnot written——
backweb0x71000000x7d0000012.0 MBnot written——
backpd0x7d000000x80000003.0 MBnot written——

About the security baseline: firmware with a higher security baseline can stop a device going back to older firmware. A device already on a higher baseline than V12.4 may refuse this file, and after installing it you may not be able to downgrade to firmware with a lower baseline.

Other files for much of the same hardware, from any vendor.