Firmware

DH_IPC-Consumer-Web-Mao-Eris_EngSpnPrt_P_V2.680.0000000.28.R.210911.bin

Dahua firmware released Sep 11, 2021. May work with 2 devices, including IPC-HDBW1235E-W-S2, IPC-HFW1235S-W-S2.

Download

Permanent copy on the Internet Archive (item page)

Hardware IDs this firmware's installer accepts (2 devices).

Where these IDs come from

hwid: the device's own hardware check list, 2 IDs
Install: the installer's device list (board families), 1 ID, vendor General (not counted: a more specific list exists)
check.img: the device's own hardware check list, 2 IDs

Read from inside the firmware (dahua package (zip variant)).

Supported languages (3)

English, Spanish, Portuguese

Flash layout: 12 partitions, 6 written by this firmware

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

Partition	Start	End	Size	Image	Filesystem	Built
U-Boot	0x3e0000	0x4a0000	768.0 KB	dhboot.bin.img	—	2021-09-11
hwid	0x4a0000	0x5a0000	1.0 MB	not written	—	—
updateflag	0x5a0000	0x6a0000	1.0 MB	not written	—	—
partition(ro)	0x6a0000	0x7a0000	1.0 MB	partition-x.cramfs.img	cramfs	2021-09-11
product(ro)	0x7a0000	0xc00000	4.4 MB	pd-x.squashfs.img	squashfs	2021-09-11
Kernel	0xc00000	0x1000000	4.0 MB	kernel.img	—	2021-09-11
web(ro)	0x1000000	0x1800000	8.0 MB	web-x.squashfs.img	squashfs	2021-09-11
romfs(ro)	0x1800000	0x3800000	32.0 MB	romfs-x.squashfs.img	squashfs	2021-09-11
ext(ro)	0x3800000	0x42a0000	10.6 MB	not written	squashfs	—
syslog	0x7400000	0x7800000	4.0 MB	not written	ubi	—
config	0x7800000	0x7c00000	4.0 MB	not written	ubi	—
backup	0x7c00000	0x8000000	4.0 MB	not written	ubi	—

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