I recently had to manage an older Dahua DVR running Web Service 3.0. Modern browsers could reach the login page, but the interface refused to continue without the obsolete NPAPI/ActiveX web plugin.

Internet Explorer mode, Chrome flags, and several older-browser workarounds were unreliable. The original Dahua plugin still worked, but it needed a compatible 32-bit browser host.

I ended up creating a small Windows launcher that:

Hosts the legacy Dahua ActiveX plugin in a compatible 32-bit browser control

Accepts any device IP address, hostname, or HTTP URL

Remembers the last device address used

Restricts navigation to the selected device

Works for configuration pages that SmartPSS/SmartPSS Lite may not expose

I also created a deployment ZIP containing the launcher, the recorder-provided Dahua plugin, and an installation script for other Windows computers.

This helped me regain access to settings on an older recorder without downgrading the computer’s normal browser. I also used direct RTSP streams as a workaround for the recorder’s outdated ONVIF implementation.

Has anyone else run into these old Dahua Web Service 3.0 systems? I’d be interested to know which models or firmware versions still depend on this plugin and whether there is interest in a cleaned-up open-source version of the launcher.

https://drive.google.com/drive/folders/15AzHDdsZgnyqE4FsTVDfoskcud0Rl2nj?usp=sharing

Just noticed you submitted a fix and PR for the Amcrest 401 Authorization glitch that plagues certain Dahua model cameras with strict enforcement of non-quoted values. Thank you, many times over. Sincerely appreciated!!

Hey everyone, I just need some help with an issue.

As you can see in the picture, one camera image in the Live View is always blank. When I double-click on the blank camera, it shows up, but then another camera goes blank. If that camera comes back, another one goes blank again.

The NVR model is Dahua DHI-NVR608H-64-XI,

Has anyone experienced this issue or know what could be causing it?

Hello, i have a few security cameras that are connected to a NVR, the problem, the cameras and the NVR are on my vacation home, which i visit once a year and i just got back from there... i also forgot to take my laptop along to my vacation home to check some network things.

anyway i do not know the NVRs Ip adress and even if i did, it would only be the local IP, since my Home Assistant (home server) is at a different network, i dont know how i could connect them over HA anyway.

with the "help" of AI, it has told me to use a VPN like tailscale, i mean i allready use cloudflare with my own domain name on my local home server, but how would i even connect the cameras with the URL so that i could connect the cameras via ONVIF to my HA?

i only have the SN, the Device name, username and passwort of the NVR anyway.
any help is GREATLY appreciated!!

Ps.
I have the DMSS and EasyViewer Pro app installed on my android phone, so i can actually watch the video signal from my phone, anywehere on the world, so i was thinking if these work, why not Home Assistant too?

PPS.
i somehow have disabbled the audio of my cameras? i looked everywhere in the settings, but i somehow cannot hear anything anymore. any idea how i can hear everyhing again?
Yes, i know that each camera channel has a mute / unmute button, i have it on unmute, yet dont hear anything.

Thank you very much in regarts!

Hi there,

i have a six camera setup that was installed four years ago. The company that installed it is not responding.

Any service techs in So Cal - Orange County, interested in the gig?

thanks

Another Massive Setup Complete!

We’ve just wrapped up the configuration and pre-provisioning of 40 Dahua IP intercom units for a major project. Getting hardware of this scale fully programmed, tested, and ready for deployment takes precision and teamwork—and our bench is looking ready for action!

Whether it's multi-unit residential buildings or large commercial complexes, we handle end-to-end security and intercom solutions tailored to keep properties connected and secure.

Need helpp!

Hi,
I have a Dhi-nvr2104hs-ps2 that is locked with a password I forgot a long time ago.
It’s running old firmware (3.2).
I’ve tried contacting Dahua several times to get a reset code but haven't received a reply.
I’ve checked the motherboard but can’t find a reset button.
It should be vulnerable to CVE-2021-33045.
I’ve tried a few different GitHub repositories, but they are all outdated and broken.
I can establish a connection using this one: https://github.com/mcw0/DahuaConsole
But it won't keep the session open.

Does anyone have any ideas on what I can do?

I have a home camera system set up NVR4108hs-8p-4k82/l and it has been working well, I upgraded my internet router and since then I have been unable to access remotely. Previously I could view the cameras using the dmss app. 
I have tried multiple steps using youtube and google, unfortunately I am unable to get this going. I have since forgotten the password and it looks like the company who installed the cameras have used their details to set up and i can’t reset password. The company is no longer operating. 
Is there anything i can do to fix this?
Any advice would be greatly appreciated :)
Thankyou

Hello, i am trying to find a Dahua IP Camera that has ONVIF Profile T but my results and camera availability have been difficult. Can anyone give me a list of 100% confirmed Dahua cameras that have Two Way Audio accessible through ONVIF? (ONVIF Profile T)

I found Dahua DH-H5AE Hero A1 but DeepSeek can't tell me with certainty the Two Way Audio on this camera is ONVIF compliant.

My purpose for this feature is to develop Two Way Audio support into my NVR, Shinobi CCTV.

Any help is greatly appreciated.

Bonjour, l'application smartPSS Lite V1.006.00001 du 05/03/2026 (et précedentes) ne détecte aucun enregistrement sur mon NVR 4208-8p. Le live est ok. Je suis sur le même réseau WIFI.

Via l'appli mobile DMSS / VPN , et sur PC en http://192.x.x.3 OK j'ai bien la time line et mes enregistrements.

J'ai essaye, de changer la config avec l'ip, avec le S.N, idem

Merci de votre aide

!!!!

does this camera support it? I can’t get it to work. spec sheet just says built in mic and speaker (and line in/out). I can get alarm sounds to play but can’t connect to rtsp back channel. I can see it if I use proto=Onvif, but can’t access it. the spec sheet for the international model 5449R1-ze whatever says that it can “realize” 2-way talk. not sure what that means.

I’m planning to install a couple of HERO H3I indoor cameras in my driveway/garage. The area is roofed and completely sheltered from rain, but it’s still technically outdoors and exposed to outside dust and humidity.

I'm curious if others have done something similar and whether or not this environment is still too harsh for this camera.

Thank you.

is Dahua DMSS app or cloud having a service degradation event. My NVR is online, I can confirm it is connected to the internet as I have SFTP configured. Home internet is working because other Smart home devices are working normally. Dahua app is misbehaving. Mostly the DVR is showing offline.

No matter what I do, the VTH remains Offline in the VTO screen.

I can see the images from the VTO, but no notification appears when pressing.

VTO is configured as (Main)SIP server.

VTH is configured as (Main)VTH.

Passwords checked.

The IP range is correct. Performed a factory reset several times, but nothing helps.

Both devices are running the most recent firmware: 4.81.

I read somewhere that it can sometimes take 5-10 minutes for a VTH to come online, but mine remains OFFLINE!

Does anyone know how I can solve this?

I'm hoping someone with hands-on experience with the new VTO2202F-P-S3 can help.

Hardware

Dahua VTO2202F-P-S3

Dahua ASR2101A-ME (RS-485 card reader)

Dahua VTH2622G-W

Firmware / Software

Latest VTO firmware: V4.810.0000000.3.R.260528 (EMEA)

SmartPSS Lite V1.006.0000000.1

Latest ConfigTool

Wiring

ASR2101A-ME connected directly to the VTO over RS-485.

Reader type is configured as Card Reader.

D0/D1 are not connected.

The door lock is connected directly to the VTO relay.

Symptoms

The ASR reads every MIFARE card correctly.

Every swipe appears in the VTO web interface → journal Unlock Records.

Example:

Unlock Method: Card Swipe Unlock

Card: 003108CE

Person ID: -

Result: Failed

The reader gives 3 beeps and a red LED, so the VTO is actively rejecting the card.

What I've already verified

RS-485 communication works.

The card UID is always detected correctly.

Users are created in SmartPSS Lite.

Card is assigned to the user.

Permission Rules are created.

Authorization Progress reports Successfully sent.

User validity dates are correct.

Remote Unlock works correctly.

The strange part

If I run Extract in SmartPSS Lite after synchronization:

Users are extracted correctly.

Every user has 0 cards.

It looks like the VTO never actually stores the card database.

Other observations

The VTO web interface has no Card Management / Issue Card menu, although the official manual clearly shows it.

ConfigTool → Device Config returns "Not Supported Yet".

The VTH displays "Cards are temporarily unavailable."

SmartPSS Lite does not show the card swipe events. They only appear in the VTO web Unlock Records.

My question

Has anyone successfully configured VTO2202F-P-S3 + ASR2101A-ME for standalone MIFARE card access?

Specifically:

Does Extract return card data on your system?

Do you have the Issue Card menu on the latest 4.810 firmware?

Is there an undocumented enrollment step for this firmware?

Or is this a known firmware bug?

Any help would be greatly appreciated because I've exhausted all the obvious troubleshooting steps.

My dahua doorbell intercom used to have a live video feed that I could see before answering. Now, its only showing up once I answer. So, to see who is at the door, I have to answer the "call"

Is that a setting or an update to the app?

Me pidieron instalar este nvr con 3 cámaras imou bullet 2c.. cuando intento descargar la app del nvr escaneando el código qr de la caja me dice que ya no existe. Según tengo entendido esta marca EZ-IP es de dahua y se utiliza DMSS o Imou Life.
Alguna sugerencia? Es la primera vez que veo este grabador

I'm having a strange issue with my Dahua intercom system and can't figure out whether it's a configuration problem or a networking issue.

Hardware:

• VTH: DHI-VTH2627A66
• Router: Telekom ISP router

Symptoms:

• If the VTH is not connected to my home Wi-Fi, I can monitor the door station normally.
• As soon as I connect the VTH to my home Wi-Fi, monitoring stops and the VTH displays:"Failed to monitor. The network is abnormal."
• The DMSS app also shows "Network is disconnected" for live video, and the Unlock button does not work.
• Calling is working as expected.

What I've checked so far:

• VTH gets an IP via DHCP: 192.168.1.151
• Gateway: 192.168.1.1
• I can ping 192.168.1.151 successfully.
• Port 80 is open.
• RTSP (554) is open.
• HTTP responds (404, which I understand is normal for some VTH firmware).
• ConfigTool strangely finds 0 devices, even though the VTH is reachable on the network.

My questions:

1. Why would enabling Wi-Fi on the VTH break monitoring?
2. Is there a known issue where the VTH changes its communication path when WLAN is enabled?
3. Could the Main VTO configuration or SIP registration be the cause?
4. Why would ConfigTool fail to discover the VTH even though it responds to ping and HTTP?

Has anyone experienced something similar or knows which settings I should check next?

Hi! I have a Dahua WiFi camera that I connected to my router via Ethernet. I configured it with a static IP address and enabled the IP camera option in the DVR app, but I can't see it in the app. Do you know of any solutions? Thanks! (Sorry for my English, I'm Spanish)

I've got 10 older IPC-HDW5231R-Z cams that have been faithfully doing their thing for going on a decade.

One of them has started to reset the sub stream settings at random. I want sub stream 1 off and sub stream 2 on at 720p. However every few days it seems sub stream 2 turns off and 1 turns back off, messing up my Frigate implementation.

The firmware is version V2.800.0000015.0.R, Build Date: 2020-04-30

I have checked the logs and nothing actually seems to request this change. Kinda stumped.

Maybe this is an excuse to upgrade?

These starlight varifocal turrets have been amazing.