Firmware
DH_SD-Hertz_MultiLang_PN_V2.811.0000020.0.R.250830.zip
Dahua firmware released Sep 22, 2025. May work with 51 devices, including PTZ-NT2000HB-0600-A, PTZ-NT2000HB-0600-B, PTZ-NT4000HB-0600-A.
- Released
- Sep 22, 2025
- Version
- V2.811.0000020.0.R
- Size
- 26.6 MB
- Hardware
- 51 devices
Download
Permanent copy on the Internet Archive (item page)
- MD5
43a6373bbd20f49256cdf0fac330d2c5- SHA-256
9b51089a040836cb97c8d3efdb7b37a59f2d8ab98e498459b445d7220d9e9db2- Changelog
- Release notes
Where it's published
Available from
Dahua
Dahua Download Center
CurrentV2.811.0000020.0.R · Listed date Sep 22, 2025
Vendor link (materialfile.dahuasecurity.com)
Previously at 1 other address
Compatible hardware
Hardware IDs this firmware's installer accepts (51 devices).
- PTZ-NT2000HB-0600-A
- PTZ-NT2000HB-0600-B
- PTZ-NT4000HB-0600-A
- PTZ-NT4000HB-0600-B
- SD-MT1A3003-HIC-A
- SD-MT1H2000HI-A
- SD-MT1H4000HI-A
- SD-MT2000-HI-A
- SD-MT2000-HI-B
- SD-MT2000-HI2-A
- SD-MT2000-HI2-B
- SD-MT2000-HI3-A
- SD-MT2000-HI3-B
- SD-MT2003-HIC-A
- SD-MT2A2000HB-0400-A
- SD-MT2A2000HB-0400-B
- SD-MT2A4000HB-0400-A
- SD-MT2A4000HB-0400-B
- SD-MT3000-HI-A
- SD-MT3000-HI-B
- SD-MT3000-HI1-A
- SD-MT3000-HI2-A
- SD-MT3000-HI2-B
- SD-MT3000-HI2-C
- SD-MT3000-HI3-A
- SD-MT3000-HI3-B
- SD-MT3400-HI-B
- SD-MT3400-HI-C
- SD-MT3A2005-HI-A
- SD-MT3A2005HB-A
- SD-MT3A2005HB-B
- SD-MT3A2005HB1-A
- SD-MT3A2005HB1-B
- SD-MT3A2005HI1-A
- SD-MT3A2005HI1-B
- SD-MT3A2010HI-A
- SD-MT3A4005HB-A
- SD-MT3A4005HB-B
- SD-MT3A4005HB1-A
- SD-MT3A4005HB1-B
- SD-MT3A4005HI-A
- SD-MT3A4005HI-B
- SD-MT3A4005HI-C
- SD-MT4000-HI-A
- SD-MT5000-HI-A
- SD-MT5000-HI-B
- SD49216HB-A
- SD49220HB-A
- SD49220HB-B
- SD49223HB-A
- SD49223HB-B
Where these IDs come from
- hwid in DH_SD-Hertz_MultiLang_PN_V2.811.0000020.0.R.250830.bin: the device's own hardware check list, 51 IDs
- Install in DH_SD-Hertz_MultiLang_PN_V2.811.0000020.0.R.250830.bin: the installer's device list (board families), 1 ID, vendor General (not counted: a more specific list exists)
- check.img in DH_SD-Hertz_MultiLang_PN_V2.811.0000020.0.R.250830.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
- Aug 30, 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).
| Partition | Start | End | Size | Image | Filesystem | Built |
|---|---|---|---|---|---|---|
| mini-Boot | 0x0 | 0x400000 | 4.0 MB | not written | — | — |
| U-Boot | 0x500000 | 0x600000 | 1.0 MB | dhboot.bin.img | — | 2025-08-30 |
| hwid | 0x600000 | 0x700000 | 1.0 MB | not written | — | — |
| updateflag | 0x700000 | 0x800000 | 1.0 MB | not written | — | — |
| dgs | 0x800000 | 0x900000 | 1.0 MB | not written | — | — |
| partition(ro) | 0x900000 | 0xa00000 | 1.0 MB | partition-x.cramfs.img | cramfs | 2025-08-30 |
| lens | 0xa00000 | 0xb00000 | 1.0 MB | not written | — | — |
| syslog | 0xb00000 | 0xf00000 | 4.0 MB | not written | ubi | — |
| config | 0xf00000 | 0x1300000 | 4.0 MB | not written | ubi | — |
| backup | 0x1300000 | 0x1700000 | 4.0 MB | not written | ubi | — |
| devconfig | 0x1700000 | 0x1b00000 | 4.0 MB | not written | ubi | — |
| Kernel | 0x2100000 | 0x2500000 | 4.0 MB | kernel.img | — | 2025-08-30 |
| romfs(ro) | 0x2500000 | 0x4100000 | 28.0 MB | romfs-x.squashfs.img | squashfs | 2025-08-30 |
| web(ro) | 0x4100000 | 0x4d00000 | 12.0 MB | web-x.squashfs.img | squashfs | 2025-08-30 |
| product(ro) | 0x4d00000 | 0x5000000 | 3.0 MB | pd-x.squashfs.img | squashfs | 2025-08-30 |
| backpart | 0x5000000 | 0x5100000 | 1.0 MB | not written | — | — |
| backKernel | 0x5100000 | 0x5500000 | 4.0 MB | not written | — | — |
| backromfs | 0x5500000 | 0x7100000 | 28.0 MB | not written | — | — |
| backweb | 0x7100000 | 0x7d00000 | 12.0 MB | not written | — | — |
| backpd | 0x7d00000 | 0x8000000 | 3.0 MB | not 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.
Related firmware
Other files for much of the same hardware, from any vendor.
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