Your security cameras, door readers, badge printers, smart thermostats, and guest Wi-Fi make your business more efficient and more secure, but they also create additional paths into your network.

For a medical, dental, or veterinary practice, that matters. A camera may seem unrelated to patient records, billing systems, or clinical workstations. However, if every device shares one flat network, a compromised or unpatched camera could give an attacker a starting point for reaching systems that contain sensitive business or patient information.

That does not mean one compromised camera automatically exposes your EHR. It means the camera may become a foothold. Network segmentation for small business limits how far an attacker can move after gaining access to one device.

As part of Cybersecurity Awareness Month 2026, use this five-step walkthrough to create a safer foundation for your connected building.

“Security is not about making every device perfect. It is about limiting the damage when one device is not.”

Why a Flat Network Creates Unnecessary Risk

Begin by picturing your network as a building. In a flat network, every room may connect directly to every other room. A camera, receptionist workstation, server, printer, and clinical computer may all sit on the same logical network.

That design is convenient, but it offers weak internal boundaries. If an attacker compromises a camera through outdated firmware, stolen credentials, or an exposed service, they may be able to scan for other devices, attempt additional logins, or exploit systems that were never intended to communicate with the camera.

Segmentation creates controlled rooms inside that building:

• Business and clinical systems
• Security cameras and NVRs
• Door controllers and badge printers
• Smart building devices
• Guest Wi-Fi
• Network and security management systems

The goal is not to disconnect useful technology. The goal is to allow only the communication each device actually needs.

This is where IoT device security becomes a practical network design issue, not just a matter of changing passwords.

Step 1: Inventory Every Connected Device

Begin by creating an inventory before changing network settings. Walk through the office, clinic, warehouse, or facility and record every device connected by Ethernet or Wi-Fi.

Include:

• Interior and exterior security cameras
• NVRs, video management systems, and cloud video bridges
• Door readers, controllers, intercoms, and electronic locks
• Badge printers and visitor management systems
• Smart thermostats, lighting controls, and environmental sensors
• Point-of-sale devices and office printers
• Guest and patient Wi-Fi access points
• Vendor-managed devices you did not personally purchase

For each device, document the manufacturer, model, serial number, physical location, IP address, firmware version, administrator, and vendor contact. Note whether it stores data locally, sends data to the cloud, or communicates with an on-site server.

Do not assume a device is harmless because it does not display patient information. A smart thermostat may have limited access today, while a poorly configured camera system could have broader network visibility than anyone realizes.

Use this inventory to identify end-of-life devices, default passwords, unsupported firmware, and systems no one currently manages. If you cannot explain what a device does or where it communicates, treat it as an unresolved risk.

As you complete this first step, you will have the information needed to design practical network zones instead of guessing.

Step 2: Separate the Network With VLANs or Physical Networks

Next, create a dedicated segment for cameras and other edge devices. For most small and midsize organizations, this means using VLANs, virtual local area networks, on a managed switch, firewall, and wireless infrastructure.

A simple design might include:

• Business/clinical VLAN: EHR systems, practice management, file servers, staff workstations, and approved printers
• Security VLAN: Cameras, NVRs, door controllers, intercoms, and badge printers
• Building IoT VLAN: Thermostats, lighting controls, sensors, and other smart devices
• Guest Wi-Fi VLAN: Patient, visitor, or customer internet access only
• Management VLAN: Firewalls, switches, monitoring tools, and authorized administrator workstations

For a very small office, a physically separate network may be easier to understand and maintain. For a growing business, VLANs provide flexibility while preserving logical separation.

Do not place cameras on the guest network simply because it is already isolated. The camera network needs its own rules, monitoring, and administrative access. Likewise, do not place door controllers on the same unrestricted segment as staff laptops.

If you use Axis Communications equipment, review the company’s Axis OS hardening guidance and AXIS Camera Station system hardening guide. Axis recommends network segregation, firewalls, limited routing, VPN access, and access control lists as part of a hardened surveillance environment.

Cloud video platforms benefit from the same discipline. Eagle Eye Networks recommends placing cameras on a separate physical network or VLAN where possible. A cloud connection does not eliminate the need to secure the local network that feeds it.

Step 3: Create Firewall Rules Based on Least Privilege

A VLAN alone is not a complete security control. Your firewall must control which segments can communicate.

Begin with a default-deny approach between networks. Then permit only the traffic required for normal operation.

For example:

• Cameras may communicate with the approved NVR, video management system, DNS, and time services.
• Cameras should not initiate connections to EHR servers, file shares, employee workstations, or financial systems.
• Door controllers should communicate only with the access-control server or approved cloud service.
• Administrators should reach cameras through a secured management network or VPN, not through direct internet exposure.
• Guest Wi-Fi should reach the internet but not business, clinical, security, or management networks.
• Cloud video services should use documented outbound connections without opening unnecessary inbound ports.

Restrict administrative access further by using unique accounts, multifactor authentication where available, and role-based permissions. Disable UPnP and unused services. Change default credentials immediately, and avoid reusing the same password across cameras or controllers.

For healthcare organizations, add vendor review to this step. If recorded video identifies patients and is created, received, maintained, or transmitted on behalf of your practice, it may qualify as electronic protected health information. Under HHS cloud computing guidance, a cloud provider handling ePHI generally requires a HIPAA-compliant Business Associate Agreement.

A BAA does not make an insecure network acceptable, and network segmentation does not automatically make a surveillance system HIPAA compliant. Treat the BAA, access controls, encryption, retention, logging, and risk analysis as connected responsibilities. Ask your compliance or legal adviser to evaluate your specific use of video.

This step turns segmentation from a diagram into an enforceable boundary.

Step 4: Monitor the Segmented Environment

Now make sure someone can tell when a device behaves abnormally. Segmentation reduces exposure, but monitoring helps you discover attempted misuse.

Set alerts for:

• A camera contacting an unknown country or unexpected internet destination
• A device communicating with the business or clinical VLAN
• Repeated failed administrator logins
• New devices appearing on the security VLAN
• Firmware or configuration changes outside a maintenance window
• Unusual outbound traffic from a camera, NVR, or smart building device
• Door-controller access from an unapproved management system

Forward firewall, switch, camera, NVR, and cloud-platform logs to a central location when supported. If your team cannot watch those alerts continuously, use managed IT services Michigan businesses can rely on for monitoring, escalation, patch coordination, and response.

NIST’s IoT guidance emphasizes monitoring activity involving connected devices for signs of incidents. That is especially important for equipment that owners rarely inspect after installation.

Monitoring also improves the value of modern surveillance platforms. Whether you use Eagle Eye Networks, Axis analytics, or another video management system, analytics are only as reliable as the network carrying the video and alerts. A congested, unmanaged, or exposed network can create gaps in visibility precisely when your team needs the system most.

Step 5: Review, Test, and Update the Design

Finish by treating segmentation as an operating process rather than a one-time installation.

Schedule a quarterly review, or review sooner when you:

• Add cameras, doors, sensors, or cloud services
• Open a new location
• Replace a firewall or switch
• Change vendors
• Move an NVR or management server
• Receive a security advisory
• Experience unusual network activity
• Change clinical or business applications

Test the rules. Confirm that a camera cannot reach the EHR network. Confirm that guest Wi-Fi cannot access a printer or camera. Confirm that administrators can still manage security equipment through the approved path. Document exceptions and remove them when they are no longer necessary.

Review firmware support and replacement timelines. An unpatchable camera should not remain on a trusted network simply because it still produces a usable image. Place it in the most restricted segment possible while you plan replacement.

For medical and dental practices, include video retention, access reviews, vendor contracts, and BAA status in the same review. For veterinary practices and other SMBs, apply the same logic to protect business records, payment systems, employee data, and customer information.

Build a 360-Degree Security Plan

Network segmentation for small business is most effective when it connects managed IT, cybersecurity, and physical security instead of treating them as separate projects.

ClearPath360 can help you discover unknown devices, design VLANs, configure firewall rules, harden cameras and access-control systems, monitor activity, and review vendor and cloud requirements. Our managed IT services and integrated physical security approach are built around proactive protection and clear communication.

If you operate in Genesee County or elsewhere in Michigan, start with a practical question: What can your cameras and smart devices reach today?

If the answer is unclear, schedule a network and security assessment. Your next step may be as simple as identifying the devices, creating a dedicated security VLAN, and closing the routes that never should have been open.

Protect the devices that watch your business, and protect the data that keeps it running.