Ever tried to connect a device or app, only to be met with the frustrating message: “Failed to find network host”? You’re not alone—this is a common headache for anyone dealing with networks at work or at home.
Understanding why this happens is crucial. Connection issues can interrupt your work, affect gaming, or halt smart devices.
In this article, we’ll break down exactly what causes this error, walk you through practical troubleshooting steps, and share tips to get you reconnected quickly—no tech expertise needed.
Understanding the “Failed to Find Network Host” Error
When your security camera system displays a “Failed to find network host” message, it can be frustrating and worrying—especially if you depend on these devices for safety and peace of mind. This problem is common with network video recorders (NVRs), IP cameras, and remote viewing apps from popular brands like Dahua, Amcrest, Lorex, and others.
So, what does this message really mean? In simple terms, your camera or NVR is trying to connect to another device on your local network (like another camera, the NVR unit, or sometimes even your router), but it cannot locate or communicate with it. This disconnect may result in missing video feeds, loss of recording, or inability to view cameras remotely.
Let’s break down what causes this issue, how you can methodically fix it, and some best practices to keep your system running smoothly.
Common Causes of the “Failed to Find Network Host” Error
This error can result from several underlying problems. Understanding each will help you zero in on a solution quicker.
1. Network Connection Issues
- Loose or damaged network cables can disrupt communication.
- Network hardware such as routers or switches may be powered off or malfunctioning.
2. Incorrect IP Address Settings
- Static IP addresses may have changed or been duplicated, causing a conflict.
- If you swapped NVRs or cameras, previous settings may not align with the new device.
3. Power Problems
- Cameras or NVRs not receiving power will be unreachable.
- Power over Ethernet (PoE) switches can also fail.
4. DHCP and Subnet Issues
- If devices are on different subnets, they may not “see” each other.
- DHCP may have assigned a new IP address, breaking static routes.
5. Device or Software Configuration
- Firmware updates may reset settings.
- Factory resetting devices without updating connection info in the NVR.
6. Firewall and Security Settings
- Some routers or NVRs have firewalls that block communication by default.
- Antivirus or security software on PCs can interfere with remote viewing apps.
Step-by-Step Guide: How to Fix the Network Host Error
Let’s go through a practical checklist you can follow to resolve this issue.
1. Check Cables and Power First
Before delving into advanced settings, rule out these simple physical issues:
- Verify all cables: Make sure Ethernet cables are firmly plugged in and undamaged.
- Check PoE switches: If using PoE, ensure switches and injectors are powered.
- Confirm device lights: Most cameras and NVRs have indicator LEDs showing network and power status. No lights usually mean no power.
2. Reboot Devices
A simple restart can resolve minor glitches.
- Power cycle the NVR.
- Restart affected cameras.
- Reboot your router or any switches involved in the setup.
- Wait for all devices to fully boot and reconnect.
3. Ensure Correct IP Addresses
Misconfigured IP addresses are a leading cause of this error.
- Use the NVR GUI or web interface: Navigate to the network or device management section.
- Verify camera IPs: Each camera should have a unique IP within the same subnet as the NVR.
- Avoid duplicate addresses: Ensure no two devices share an IP address.
- Update device list: If you replaced your NVR or cameras, update the device registration info.
4. Check Network Settings
- DHCP vs. Static IP: Consider assigning static IPs to cameras and NVRs to avoid changes upon reboot.
- Subnet consistency: For most home or small business setups, the subnet mask should typically be 255.255.255.0. All devices’ IP addresses must match this scheme (e.g., 192.168.1.x).
- Gateway setting: The gateway address should usually be the IP of your router.
5. Update Device Firmware
Manufacturers occasionally release firmware updates that can address network communication faults.
- Use the manufacturer’s update tool or web interface.
- Always back up configurations before updating.
6. Disable Firewalls or Antivirus Temporarily
- If remote access apps (like SmartPSS or manufacturer-specific programs) cannot connect, temporarily turn off your firewall and antivirus.
- After testing, re-enable and add exceptions if needed.
7. Perform Device Discovery
Most NVRs and companion apps have a ‘search’ or ‘auto-discover’ feature.
- Use this tool to scan for cameras or NVRs on the local network.
- This can auto-populate devices’ IP addresses and resolve detection problems.
8. Factory Reset as Last Resort
If all else fails, reset affected devices to factory settings. Remember:
- You’ll lose all settings: Record all essential configurations first.
- Reconfigure after reset: Set IP addresses and all other relevant settings again.
Special Considerations for Replacing NVRs or Cameras
Many users encounter the “Failed to find network host” message after replacing an NVR or adding new cameras. Here’s what you should do:
- Delete and re-add devices: Remove old device entries from your system and register new ones using updated IPs.
- Update camera credentials: Old passwords or user names may not match new devices.
- Check power requirements: Some new cameras need more power than your PoE switch can supply.
Best Practices and Pro Tips
- Document your settings: Keep a record of all device IP addresses, usernames, and passwords.
- Label network cables: This simplifies troubleshooting when hardware is moved or replaced.
- Schedule regular reboots: Some users schedule their NVR/router to reboot weekly for optimal performance.
Tips for Remote Viewing
For remote viewing over the internet:
- Set up port forwarding carefully: Only open necessary ports for your NVR.
- Use strong passwords: Secure your devices against unauthorized access.
- Consider VPN for security: Connecting to your network over a VPN reduces exposure.
Challenges and How to Overcome Them
1. Identifying Conflicting IPs
- Use network scanning tools to find all devices and their addresses.
- Update conflicting devices to new, unique addresses within your subnet.
2. Inaccessible Devices
- Devices stuck in a boot loop may require a full reset.
- Some models offer backup recovery via SD card or USB.
3. Compatibility Issues
- Not all cameras work with all NVRs, even from the same brand.
- Use ONVIF-compliant devices for broader compatibility.
Cost-Saving Tips
- Reuse cables when possible: Test old cables before discarding—many work fine after routers or switches are replaced.
- Buy network switches with more ports than you currently need: This saves money as your system grows.
- Compare models: Choose cameras and NVRs that support open transfer protocols (like ONVIF) for easier integration and futureproofing.
- Preventative maintenance: Regularly check cable connections and keep devices clean to avoid unnecessary replacements.
If you plan to ship or receive hardware:
- Buy from reputable dealers offering free or discounted shipping.
- Check warranty and return policies to avoid unexpected costs if hardware is DOA (dead on arrival).
Conclusion
Addressing a “Failed to find network host” error can seem tricky, but following a systematic approach makes it manageable. Always start with the basics—power and cables—then move on to IP and network settings. Document your configuration, back up settings, and take your time with each troubleshooting step.
A robust home or business camera system relies on consistent and correct network communications. By understanding the root causes and following these best practices, you can keep your system running reliably and head off future problems quickly.
Frequently Asked Questions (FAQs)
What does “Failed to find network host” mean on my NVR or camera?
This message indicates that your device cannot locate or communicate with another necessary device on your network—usually due to a network misconfiguration, disconnected cable, or incompatible settings.
How do I know if my camera or NVR is getting power?
Most devices have indicator lights (LEDs) near the network and power ports. If these lights are off, try checking the cable, power supply, or PoE switch to ensure your device is receiving the necessary power.
Do I need a static IP address for my cameras and NVR?
Using static IP addresses is recommended for security systems. It ensures your devices always use the same address, which prevents connection issues caused by changing IPs through DHCP.
Can I fix this problem without resetting my NVR or cameras?
In most cases, yes. Start by checking cables, power, and IP settings. Only consider a factory reset as a last resort if other solutions fail.
Why did the error appear after I replaced my NVR or upgraded my network?
When swapping hardware, network settings often change. Old devices may have had unique IPs or credentials not carried over to the new hardware. Always update device lists, IP addresses, and passwords after replacing or upgrading network components.
Armed with this knowledge, you’re well-equipped to tackle the “Failed to find network host” issue—and keep your surveillance system running smoothly and securely.