Should Security Cameras Be on a Separate Network?

Should Security Cameras Be on a Separate Network?

A business installs 20 IP cameras.

The cameras connect to a PoE switch. The NVR sits in the network closet. Employees can pull up live video when needed. Everything records.

Technically, it works.

Then somebody asks a simple question:

“Are these cameras on the same network as our employee laptops?”

Nobody is completely sure.

Maybe the accounting computers, printers, cameras, phones, NVR, employee laptops, servers, and other connected devices can all communicate across one flat network.

That deserves a closer look.

Yes. In most business environments, IP security cameras should be placed on a separate VLAN or another logically segmented network. Cameras generally need to communicate with an NVR or video-management system, selected management devices, DNS or NTP services, approved cloud services, and authorized viewers—not every computer and server in the company.

Segmentation reduces unnecessary communication paths and can limit what a compromised or misconfigured device can reach. CISA specifically recommends separating networks by role or function and limiting cross-segment communication to what the business actually requires. (CISA)

The camera still needs network access.

It just doesn't need access to everything.

Why Cameras Are Different From Normal Computers

An IP camera is not just a lens with an Ethernet cable.

It is a networked computing device.

Depending on the model and architecture, it may contain:

• An operating system

• Firmware

• User accounts

• A web-management interface

• Streaming services

• APIs

• DNS and time configuration

• Cloud connectivity

• Update mechanisms

• Network services

Like other IoT devices, cameras increase the number of networked systems that need configuration, access control, patching, inventory, monitoring, and eventual replacement.

That does not mean every IP camera is insecure.

It means cameras should be treated as managed network assets rather than appliances that get installed once and forgotten.

NIST's IoT security guidance supports limiting IoT devices to the network communications required for their intended function. Its Manufacturer Usage Description work specifically demonstrates policies where devices are permitted the traffic they need while other communication is restricted. (NIST)

That principle maps nicely to camera networks:

Give the camera system access to what it needs—and nothing it doesn't.

What Is Network Segmentation?

Network segmentation divides devices into separate logical or physical network zones and controls communication between those zones.

Instead of one big internal network containing everything, you might have:

Employee Network

Laptops and desktops

↓

Camera Network

IP surveillance cameras

↓

Server / Infrastructure Network

Selected business infrastructure

↓

Guest Wi-Fi

Visitors and personal devices

The key part is not simply creating those groups.

The important part is controlling what is allowed to move between them.

NIST's Zero Trust Architecture guidance also makes an important broader point: a device should not automatically be trusted simply because it sits inside a company network. Network location is only one piece of the security decision. (NIST)

What Is a Camera VLAN?

A VLAN, or Virtual Local Area Network, lets managed network infrastructure logically separate devices even when they share physical switches.

For example:

VLAN 10 — Business Devices

Employee computers

VLAN 20 — Voice

Business phones

VLAN 30 — Guest

Visitor devices

VLAN 40 — Cameras

IP security cameras

Those numbers are examples only. There is no universal rule that cameras belong on VLAN 40.

This arrangement allows a company to use the same managed switching infrastructure while keeping different device groups logically separate.

For many small and midsize businesses, this is more practical than building an entirely independent physical camera network.

A VLAN Is Not the Same Thing as a Firewall Rule

Here's the part companies often miss.

Creating a VLAN does not automatically mean:

“Nothing can communicate with it.”

Imagine:

Camera Network

192.168.40.0/24

Office Network

192.168.10.0/24

The cameras are now in a different Layer 2 broadcast domain.

Good.

But if the router or firewall freely routes traffic between those networks, your cameras may still be able to reach office systems.

Segmentation is useful only when the access policies actually enforce the boundary.

At a high level:

VLAN

Creates logical separation.

Firewall / Layer 3 Policy

Controls which networks, hosts, applications, or services may communicate across that separation.

That distinction matters.

SimplyRem's current networking practice likewise separates VLAN planning from firewall and segmentation policy, publishing services around VLAN maps, routing architecture, next-generation firewall design, segmentation, monitoring, and documented network topology. (SimplyRem)

Physical Separation vs. Logical Separation

You do not necessarily need a second internet connection, separate router, completely independent switching stack, and another set of cables just for cameras.

There are two broad approaches.

Physical Separation

Camera systems operate on more physically independent infrastructure.

That may involve:

• Dedicated switches

• Dedicated firewall interfaces

• Separate cabling paths

• Separate network equipment

• More limited physical connections to other systems

This can make sense in environments with higher security requirements, operational constraints, large surveillance deployments, or specific physical-security policies.

Logical Separation

Cameras share appropriate network infrastructure but belong to their own VLAN or subnet.

A firewall or routing policy controls communication between the camera network and other parts of the business.

For many businesses, this is the practical answer.

A dedicated camera VLAN with properly configured firewall policies can provide useful segmentation without requiring an entirely independent physical network.

Why Camera Segmentation Helps

Reduced Lateral Movement

Lateral movement is an attacker moving from one compromised device to other devices or systems within an environment.

If a camera is compromised but can freely communicate with employee laptops, file servers, administrative systems, and accounting PCs, there are more potential paths available.

Segmentation can restrict those paths.

CISA recommends network segmentation specifically because controlling traffic between subnetworks can make lateral movement more difficult and help contain the effect of an intrusion. (CISA)

It does not guarantee that an attack cannot spread.

It reduces unnecessary opportunity.

Smaller Trust Zone

A lobby camera does not normally need unrestricted access to an accounting workstation.

Your parking-lot camera probably does not need to reach a domain controller.

Your NVR may need to talk to the cameras.

Your receptionist's laptop probably doesn't.

Cleaner Firewall Policy

A dedicated camera network gives IT a logical place to define policy.

For example:

Camera devices may reach the NVR.

Authorized management devices may reach camera-management services.

Ordinary employee devices do not automatically receive the same access.

Easier Troubleshooting

When camera devices occupy a known network range or VLAN, camera traffic can be easier to identify.

That can help investigate:

• Offline cameras

• Streaming problems

• NVR connectivity

• Bandwidth problems

• Unexpected traffic

Better Monitoring

Known camera network boundaries can also make unusual communication easier to notice.

NIST's 2025 work on characterizing IoT network behavior specifically notes that understanding expected network communication makes it possible to establish appropriate firewall or ACL restrictions and recognize unusual behavior. (NIST)

What Should Cameras Be Allowed to Reach?

There is no universal firewall rule set for every camera system.

Vendor architecture matters.

So does the NVR, VMS, remote-viewing design, firmware process, and whether the solution is cloud-managed.

But common requirements include the following.

NVR or VMS

An NVR, or Network Video Recorder, receives and stores video from IP cameras.

A VMS, or Video Management System, provides software for managing, recording, searching, and viewing video.

Camera-to-NVR or camera-to-VMS communication is normally one of the central flows in a surveillance network.

Do not accidentally block the system's main job in the name of security.

DNS

DNS translates names into network addresses.

A camera or recorder may need DNS when it communicates with services by hostname rather than fixed IP address.

NTP

NTP, or Network Time Protocol, synchronizes device clocks.

Correct timestamps matter more on surveillance equipment than people sometimes realize.

If you are reviewing an incident at 2:17 PM, you want the camera, access-control system, firewall, and other relevant logs to agree reasonably well about what 2:17 PM means.

Approved Vendor Cloud Services

Some camera architectures rely heavily on cloud services.

Others do not.

Allow what the supported architecture requires instead of assuming every camera either needs unrestricted internet access or should have none.

Firmware and Update Services

If the camera obtains updates through external services, those requirements need to be considered.

Authorized Management

A restricted administrator workstation or management network may need to access camera interfaces.

That does not mean every office PC needs the same permission.

What Should Cameras Usually Not Reach?

Unless a documented workflow requires it, cameras usually do not need unrestricted access to:

• Accounting workstations

• HR computers

• General employee laptops

• File servers

• Domain controllers

• Point-of-sale systems

• Printer administration

• Guest devices

• Other unrelated IoT systems

• Sensitive server networks

The word unrestricted matters.

There may be legitimate exceptions.

Document them.

A Simple Camera Network Architecture

A conceptual architecture might look like this:

Internet

↓

Business Firewall

↓

Camera VLAN

IP Cameras

↓

NVR / VMS

↓

Authorized Viewing or Management Devices

The real environment may have more branches.

For example, the authorized viewing workstation might sit on a management VLAN while the NVR sits on a surveillance/server network.

That's fine.

The principle stays the same:

Communication should be intentional.

Should the NVR Be on the Camera VLAN?

It depends.

There are several valid designs.

Option 1 — NVR on the Camera VLAN

The cameras and NVR reside in the same surveillance network.

Authorized employees reach the NVR through controlled access from another network.

This can be straightforward in smaller installations.

Option 2 — Dual-Interface NVR

Some recorder architectures support separate network interfaces.

One interface may communicate with cameras.

Another may support management or client access.

Whether that is appropriate depends heavily on the recorder and vendor design.

Option 3 — NVR on a Server or Surveillance VLAN

The NVR resides in another controlled network while firewall policies permit the necessary camera streams.

This may make sense in larger architectures.

There is no single correct placement.

The right design depends on the recorder, vendor support, network topology, bandwidth, management requirements, and security policy.

Should Security Cameras Have Internet Access?

Not automatically.

First ask:

Why does this camera need the internet?

Legitimate reasons may include:

• Cloud management

• Push notifications

• Remote-viewing architecture

• Cloud recording

• Licensing

• Firmware services

• Vendor monitoring

If the system does not require internet connectivity, limiting that connectivity may be reasonable.

If it does require internet connectivity, configure it according to the vendor's supported architecture and your network-security requirements.

Do not randomly block IP addresses or domains and hope nothing breaks.

Understand the traffic first.

Local NVR Cameras vs. Cloud Cameras

Local NVR Architecture

Cameras primarily communicate with a recorder inside the business environment.

Depending on the product, direct camera internet access may be easier to restrict.

Cloud-Managed Architecture

Cameras or gateways may require persistent outbound communication to vendor services.

That does not eliminate the value of segmentation.

It changes which communications need to be permitted.

Neither model is automatically more secure simply because one says “cloud” and the other says “local.”

Configuration matters.

Identity matters.

Firmware matters.

Remote access matters.

Vendor architecture matters.

Remote Viewing Needs Special Attention

Everybody wants to check the cameras from home.

That's reasonable.

But:

Remote viewing should not automatically mean exposing the NVR directly to the internet.

Approaches may include:

• A properly configured VPN

• Vendor-supported secure cloud access

• Zero Trust access where appropriate

• Another properly designed secure remote-access architecture

Avoid casually opening recorder administration interfaces to the public internet.

CISA's current internet-exposure guidance recommends reducing unnecessary external exposure and, for systems that must remain internet accessible, changing defaults, maintaining patches, using secure monitored access, MFA where possible, and monitoring traffic. (CISA)

Port forwarding is not automatically evil.

But opening an administration service to the world without understanding the exposure deserves much more thought than “the mobile app needs to work.”

Camera Passwords Still Matter

A dedicated camera VLAN does not fix:

admin / admin

Change default credentials.

Use strong, unique administrative passwords.

Where practical:

• Limit administrative accounts

• Use individual accounts

• Store credentials appropriately

• Remove old users

• Review installer/vendor accounts

• Disable unnecessary defaults where supported

Do not give ten employees the same administrator password simply because everyone occasionally views cameras.

Use MFA Where the Platform Supports It

Some camera ecosystems support MFA on:

• Cloud management portals

• NVR management platforms

• Remote-viewing accounts

• Central camera-management services

Use it where supported and appropriate, especially for administrative and remote access.

Do not assume the individual camera itself supports MFA.

Many do not.

Keep Firmware in the Conversation

Cameras run software.

Software has bugs.

Manufacturers release updates.

Eventually products reach end of support.

A practical camera-management process should understand:

• Current firmware

• Vendor security advisories

• Supported releases

• Compatibility

• End-of-life status

• Maintenance procedures

CISA recommends keeping internet-accessible systems patched and replacing devices that are no longer receiving security support. (CISA)

That does not mean blindly installing an update on 80 production cameras in the middle of the day.

Check compatibility.

Test appropriately.

Plan the maintenance.

A Camera Can Work and Still Be End-of-Life

This surprises people.

A camera can continue producing a perfectly good image long after the vendor has stopped supporting its software.

Operationally, it works.

From a lifecycle perspective, you may now have:

• No security updates

• Old cryptographic support

• Old management protocols

• Limited browser compatibility

• Unsupported firmware

• Difficulty integrating with newer recorders

Security-camera planning should include replacement lifecycle—not simply whether the lens still produces video.

What Is PoE?

PoE, or Power over Ethernet, lets compatible network equipment provide network connectivity and electrical power over the Ethernet cable.

That is why a professional IP-camera installation can often run one cable to each camera.

PoE planning should consider:

• Port count

• Power budget

• Camera power requirements

• Uplink bandwidth

• Switch management

• UPS capacity

• Physical location

A dedicated PoE switch does not automatically mean a dedicated secure network.

If that switch connects into the rest of the infrastructure without appropriate VLAN and routing policy, the cameras may still have broad access.

SimplyRem's currently published low-voltage and DVR guidance specifically includes PoE switching, IP camera systems, NVR/DVR deployments, segmentation, secure remote access, bandwidth planning, and camera-network design. (SimplyRem)

Managed Switch vs. Unmanaged Switch

A managed switch can generally provide features such as:

• VLAN configuration

• Port configuration

• Network monitoring

• Traffic controls depending on model

• Trunk/access-port configuration

• Administrative visibility

An unmanaged switch normally offers far fewer segmentation controls.

If VLAN segmentation is part of your camera design, your switching infrastructure needs to support the required VLAN behavior.

Buying a “camera switch” printed on a box does not answer that question.

What Might the Firewall Policy Look Like?

Conceptually:

Camera VLAN → NVR

Allow required surveillance communication

Camera VLAN → Corporate Network

Deny by default unless a documented requirement exists

Authorized Management Device → Camera VLAN

Allow required administration

Camera VLAN → Internet

Allow according to actual camera/vendor requirements

These are conceptual examples—not a firewall configuration you should paste into production.

Specific:

• Ports

• Protocols

• IP addresses

• Multicast requirements

• Cloud destinations

• Discovery mechanisms

depend on the equipment.

What About Return Traffic?

Modern business firewalls are usually stateful.

At a simplified level, that means the firewall can remember an authorized connection and allow appropriate return traffic without opening unrestricted communication in both directions.

For a business reader, the main takeaway is straightforward:

Controlled access does not mean every response packet needs a separate manual rule.

Actual firewall behavior depends on the platform and policy.

Why Cameras Sometimes “Disappear” After VLAN Segmentation

You've moved the camera.

The network is cleaner.

Then the NVR says:

Camera not found.

This does not necessarily mean segmentation was a mistake.

Some discovery mechanisms depend on:

• Broadcast traffic

• Multicast

• Devices sharing a subnet

• Vendor-specific discovery protocols

Moving the camera to another network can change that behavior.

Possible solutions include:

• Manually configuring camera addresses

• Using supported cross-network management

• Adjusting the architecture

• Configuring multicast appropriately

• Following the vendor's supported discovery process

Do not immediately remove the VLAN because automatic discovery stopped.

Find out what discovery actually requires.

Video Traffic Can Be Heavy

A camera is continuously creating data.

Multiply that by:

• Resolution

• Frame rate

• Compression settings

• Stream count

• Camera count

• Recording

• Live viewing

• Remote viewing

• Cloud upload

and the traffic adds up.

A large surveillance environment should consider:

• Access-switch capacity

• Uplink capacity

• Recorder interfaces

• Firewall throughput where traffic crosses it

• Internal backbone capacity

• WAN requirements

• Storage

SimplyRem's current low-voltage guidance also distinguishes internal camera bandwidth from internet usage: locally recorded video can generate substantial LAN traffic without consuming equivalent internet bandwidth, while cloud recording changes that picture. (SimplyRem)

Do not size a camera network using only an internet speed test.

Segmentation Should Not Make Cameras Slow

A correctly designed VLAN does not inherently make video slow.

Performance problems are more likely to come from issues such as:

• Oversubscribed uplinks

• Poor cabling

• Insufficient PoE capacity

• Network loops

• Misconfigured switching

• Firewall bottlenecks

• Excessively heavy streams

• NVR performance

• Storage limitations

Security and performance need to be designed together.

What About Wi-Fi Cameras?

Wireless cameras can work in business environments.

If they are appropriate for the installation:

• Use a dedicated SSID/VLAN where appropriate

• Use suitable wireless security

• Verify signal quality

• Understand bandwidth use

• Review roaming behavior where relevant

• Understand vendor/cloud dependencies

Do not throw them onto guest Wi-Fi simply because guest Wi-Fi is already “separate.”

For permanent commercial installations, wired PoE often provides simpler power and more predictable connectivity when cabling is practical.

That does not make every wireless camera insecure.

Guest Wi-Fi Is Not Your Camera Network

Guest networks frequently have special behavior.

They may:

• Isolate clients

• Block local traffic

• Use captive portals

• Restrict internal destinations

• Apply unusual firewall rules

• Use bandwidth controls

Those settings are designed for visitors.

Not surveillance infrastructure.

Create a camera network around the requirements of the camera system rather than repurposing whatever isolated SSID happens to exist.

Camera VLAN or General IoT VLAN?

A small business may reasonably group several categories of similar low-risk IoT devices.

A larger business might separate:

• Cameras

• Access control

• Printers

• TVs/displays

• Building-management equipment

• Other IoT

How granular should you go?

It depends on:

• Risk

• Device count

• Network capabilities

• Traffic requirements

• Management effort

• Operational importance

More VLANs are not automatically better.

Over-Segmentation Is a Real Thing

You can absolutely make a network unnecessarily complicated.

Forty VLANs.

Hundreds of poorly documented firewall rules.

Nobody remembers why VLAN 173 exists.

One application breaks every time a switch is replaced.

That's not good architecture either.

Good segmentation creates understandable security boundaries. It should not become a collection of 40 VLANs nobody can explain.

The design should be secure enough for the risk and simple enough for another qualified administrator to understand.

A Practical Small-Business Example

An office might use:

VLAN 10 — Business

Company laptops and desktops

VLAN 20 — Voice

VoIP phones

VLAN 30 — Guest Wi-Fi

Visitor devices

VLAN 40 — Cameras

IP surveillance cameras

VLAN 50 — Infrastructure

Selected servers or infrastructure

Again, these numbers are only illustrative.

The firewall then controls which networks can communicate.

The camera VLAN might be permitted to reach its NVR and required services while being prevented from initiating arbitrary connections toward the business network.

That's the important part.

Multi-Location Camera Systems

A company with several locations has more choices.

It may use:

• Local NVRs

• Central monitoring

• Cloud-managed cameras

• Site-to-site VPN

• Secure remote viewing

• Centralized management

• Hybrid architecture

Do not automatically send every full-resolution camera stream back to headquarters.

That can create substantial WAN usage without providing meaningful value.

Figure out where recording happens, where people actually view footage, what happens if the WAN goes down, and what the operational requirements are.

SimplyRem's current Networking practice includes branch architecture, multi-site connectivity, SD-WAN, secure remote access, segmentation, network monitoring, and documentation. (SimplyRem)

Review Camera Installer and Vendor Access

Ask:

• Does the original installer still have an administrator account?

• Does the vendor require continuing remote access?

• Who owns the primary account?

• Is support access documented?

• Can temporary access be used instead?

• Who reviews access when the relationship ends?

This is not about assuming the installer is untrustworthy.

It's basic lifecycle management.

A contractor who finished a project three years ago should not retain privileged access merely because nobody remembered to remove the account.

Review the Default Configuration

A newly installed camera or recorder deserves a configuration review.

Check relevant settings such as:

• Default credentials

• Administrative accounts

• Firmware

• DNS

• NTP

• HTTPS management

• Cloud connectivity

• Logging

• Unnecessary services

• Remote-access configuration

Do not randomly disable services because their names look unfamiliar.

Understand their purpose first.

Use Encrypted Management Where Supported

Where the camera or recorder supports modern encrypted management protocols, use them appropriately.

Plain HTTP administration can expose management traffic in readable form across the network.

HTTPS helps protect that session in transit.

It does not magically protect the camera from:

• Weak credentials

• Old firmware

• Bad firewall rules

• Compromised administrator accounts

• Physical theft

Security controls work together.

Maintain a Camera Inventory

Security cameras should not become invisible devices mounted eight years ago and forgotten.

For each important camera or recorder, document:

Device

Model and type

Location

Where it is installed

Network

IP addressing and relevant VLAN

Owner

Who is responsible

Firmware

Current status/version where appropriate

Credentials

Where credentials are securely managed—not the password itself in broad documentation

Purpose

What area or function the device supports

Lifecycle

Whether the equipment remains supported

SimplyRem's current IT-documentation guidance recommends documenting major VLANs, firewalls, switches, remote access, network topology, owners, dependencies, and network diagrams in a maintainable form. (SimplyRem)

Monitor What Matters

Depending on the camera platform, useful monitoring may include:

• Camera availability

• Failed camera connections

• NVR storage health

• Authentication events

• Configuration changes

• Network traffic

• Recorder availability

• Internet/cloud connectivity

Not every camera provides enterprise-grade telemetry.

Work with what the platform actually supports.

DNS and NTP Are Small Details Until They Break

DNS

Translates names into IP addresses.

NTP

Keeps clocks synchronized.

For surveillance systems, time matters.

If video says 4:38 PM but your access-control system says 4:44 PM for the same event, an investigation gets harder.

Use appropriate trusted or internal time sources according to the architecture.

Does Segmentation Stop Ransomware?

No.

Do not sell network segmentation as a magic shield.

Segmentation can reduce unnecessary paths and may limit lateral movement after a compromise. CISA includes network segmentation among ransomware mitigations for exactly that reason. (CISA)

But a broader security program can also require:

• Endpoint protection

• MFA

• Secure remote access

• Patching

• Access control

• Backups

• Monitoring

• Identity management

• Secure configuration

A camera on its own VLAN can still be badly secured.

Do Not Forget the Physical NVR

The recorder itself may contain days or weeks of sensitive surveillance footage.

Consider:

• Locked network/server areas

• Restricted physical access

• Recorder location

• UPS

• Storage protection

• Tamper exposure

• Recovery

• Appropriate retention

Cybersecurity is only half of physical-security infrastructure.

If somebody can unplug the NVR and walk away with it, the firewall rules aren't going to help much.

How Long Should Camera Footage Be Retained?

There is no universal answer.

Define retention using:

• Business requirements

• Storage capacity

• Incident-investigation needs

• Insurance requirements

• Customer/contract requirements

• Applicable legal obligations

Do not assume every company should record 30 days, 60 days, or 90 days.

Different businesses have different requirements.

Cameras Also Create Privacy Questions

Security-camera deployments can capture:

• Employees

• Customers

• Visitors

• Public areas

• Private areas

• Potentially audio

Surveillance and audio-recording rules vary by jurisdiction and context.

For legal questions—particularly employee monitoring, audio recording, notice requirements, or regulated environments—use qualified legal guidance applicable to the business.

Network segmentation does not make a surveillance practice legally compliant.

Common Camera Network Mistakes

Everything Is on One Flat Network

The camera works, but so does unnecessary device-to-device communication.

Segment by function where appropriate.

A VLAN Exists but Everything Is Allowed Through the Firewall

The diagram looks segmented.

The traffic isn't.

Review the policies.

NVR Management Is Publicly Exposed

Remote access deserves a supported secure architecture rather than casual public exposure.

Default Credentials Remain

Segmentation does not excuse weak authentication.

The Installer Account Never Goes Away

Review third-party access as part of lifecycle management.

Cameras Are Never Updated

Know whether equipment remains supported and how updates are managed.

Unsupported Cameras Remain Forever

Working hardware and supported hardware are not always the same thing.

The NVR Has No Power Protection

Network architecture cannot fix a recorder that shuts down during every power interruption.

Nobody Knows the Camera Addresses

Maintain useful inventory.

Nobody Knows Why a Firewall Rule Exists

Document intent alongside configuration.

Cameras Use Guest Wi-Fi

Guest networking is built for guests, not necessarily cameras.

Segmentation Happens Without Testing

Verify:

• Recording

• Live view

• Discovery

• Mobile access

• Remote viewing

• Notifications

• Time synchronization

• Cloud functions

before calling the project finished.

When Does a Separate Physical Network Make Sense?

Physical separation deserves consideration when:

• Security requirements are unusually high

• Surveillance is operationally critical

• Camera scale is substantial

• Dedicated bandwidth is required

• Vendor architecture calls for it

• Physical-security policy requires it

• Regulatory or contractual requirements affect design

Physical separation is stronger in some ways but costs more to build and manage.

It is not automatically required for every business.

When Is a VLAN Usually Enough?

For many small and midsize organizations, a practical camera architecture can use:

• A managed firewall

• Managed switches

• A dedicated camera VLAN

• Appropriate inter-VLAN firewall policy

• A properly secured NVR/VMS

• Controlled remote access

• Documentation

• Monitoring

The exact design depends on the environment.

The goal is controlled communication, not breaking the camera system.

When Segmentation Is Not Enough

Putting cameras on VLAN 40 does not eliminate the need for:

• Strong credentials

• Firmware management

• Secure remote access

• MFA where supported

• Device inventory

• Vendor access review

• Monitoring

• Physical security

• Lifecycle planning

• Recovery planning

NIST's Zero Trust guidance is useful here because it explicitly rejects the idea that network location alone should automatically confer trust. (NIST)

A VLAN is part of architecture.

It is not an entire security program.

Security Camera Network Decision Path

Are cameras currently on the unrestricted employee network?

Yes → Evaluate segmentation.

↓

Can the firewall and switching infrastructure support VLANs?

Yes → Consider a dedicated camera VLAN.

No → Infrastructure changes may be required.

↓

Do cameras need an NVR or VMS?

Yes → Permit the required camera-to-recorder communication.

↓

Who needs to manage or view the cameras?

Authorized users only → Restrict access accordingly.

↓

Do cameras need internet access?

Yes → Permit required vendor/cloud communication according to supported architecture.

No → Consider restricting unnecessary outbound access.

↓

Is remote viewing required?

Yes → Use a secure supported remote-access design.

↓

Is the environment unusually sensitive or operationally critical?

Yes → Evaluate stronger segmentation or physical separation.

Camera VLAN Implementation Checklist

1. Inventory every camera.

2. Inventory the NVR or VMS.

3. Document existing network addressing.

4. Identify required device communication.

5. Identify required internet/cloud communication.

6. Create the camera VLAN/subnet.

7. Configure managed switch ports.

8. Configure PoE capacity appropriately.

9. Configure addressing or DHCP reservations according to the design.

10. Configure firewall policy.

11. Permit required NVR/VMS traffic.

12. Restrict unnecessary access to corporate systems.

13. Configure required DNS and NTP.

14. Review remote access.

15. Test live viewing.

16. Test recording.

17. Test playback.

18. Test mobile applications.

19. Test remote viewing.

20. Test alerts or notifications.

21. Test camera discovery.

22. Document the final configuration.

23. Monitor the environment after rollout.

Before and After Network Example

Before

Internet

↓

Router / Firewall

↓

One Flat Business LAN

↓

Security Cameras

NVR

Accounting PCs

Employee Laptops

Printers

IoT Devices

Everything may have broad internal reachability.

Redesigned Direction

Internet

↓

Business Firewall

↓

Controlled Network Segments

↓

Corporate VLAN

Employee devices

↓

Camera VLAN

IP cameras

↓

Infrastructure / Surveillance Network

NVR or related services where appropriate

↓

Guest VLAN

Visitor devices

The firewall determines which cross-network communication is permitted.

This is a conceptual architecture. Actual implementations vary.

Camera Network Health Cards

Healthy

Possible signs:

• Cameras inventoried

• Dedicated network segment

• Firewall policy documented

• Default credentials removed

• Firmware maintained

• Administrator access restricted

• Remote access controlled

• NVR physically protected

• Installer access reviewed

• Network configuration documented

Caution

Possible signs:

• Cameras share a network with employee systems

• Firmware status unclear

• Administrators unknown

• Firewall rules are overly broad

• Cloud requirements have not been reviewed

• Camera inventory is incomplete

• Remote access design is poorly documented

High Risk

Possible signs:

• Camera management directly exposed to the internet without adequate safeguards

• Default credentials remain

• Unsupported equipment is deployed

• Former installers retain privileged access

• Cameras can freely reach sensitive internal networks

• Remote NVR access is weakly protected

• Nobody understands how the surveillance network is configured

This is an illustrative network-health framework, not an official security rating.

What to Ask Your Camera Installer

1. Which network or VLAN should the cameras use?

2. Which communication does the NVR require?

3. Which protocols does the system use?

4. Do individual cameras require internet access?

5. Which cloud services are required?

6. How are firmware updates performed?

7. Who owns the administrator account?

8. Does the installer retain remote access?

9. Can installer access be disabled when not required?

10. How does remote viewing work?

11. What happens when internet service fails?

12. What happens when the NVR fails?

13. How is footage exported?

14. Which devices need direct camera access?

15. How is time synchronized?

What to Ask Your IT Provider

1. Are cameras currently segmented?

2. Which firewall policies apply?

3. Can cameras initiate connections toward corporate devices?

4. Which corporate devices may access cameras?

5. Is NVR access restricted?

6. Does the system need internet connectivity?

7. How is remote viewing secured?

8. Are the switches managed?

9. Is the PoE budget sufficient?

10. Are network uplinks sized appropriately?

11. Is the surveillance environment documented?

12. Is unusual camera traffic monitored?

13. Are firmware and device lifecycle tracked?

14. Is vendor access periodically reviewed?

How SimplyRem Can Help

SimplyRem's currently published services cover the areas that meet in a camera-network project: IP and analog camera systems, DVR/NVR infrastructure, PoE switching, network wiring, network segmentation, secure remote access, network architecture, next-generation firewall design, monitoring, documentation, and cybersecurity work. (SimplyRem)

SimplyRem can review how cameras, NVRs, switches, firewalls, Wi-Fi, and business devices currently communicate, then help determine whether a dedicated camera VLAN, firewall-policy changes, infrastructure updates, or broader network segmentation make sense for the environment.

Sometimes the answer is a straightforward VLAN and firewall-policy cleanup.

Sometimes the switch infrastructure needs work.

Sometimes the NVR architecture or remote-access design is the bigger issue.

The first step is understanding how the system works today.

Frequently Asked Questions

1. Should security cameras be on a separate network?

Yes, generally. In most business environments, IP cameras should be logically separated from normal employee devices using a dedicated VLAN or another appropriate segmentation method. The camera network can still communicate with the NVR, management services, cloud endpoints, and authorized users where required.

2. Should IP cameras be on their own VLAN?

Usually, yes. A dedicated camera VLAN provides a useful logical boundary and makes it easier to apply firewall policies specifically to surveillance devices. The VLAN itself is not enough, though. Inter-VLAN routing and firewall policies determine what cameras can actually reach.

3. What is a camera VLAN?

A camera VLAN is a logical network segment dedicated to IP surveillance equipment. It allows cameras to use managed switching infrastructure while separating their Layer 2 network from employee computers, guest devices, and other systems. Firewall or routing policy then controls communication between those networks.

4. Does putting cameras on a VLAN make them secure?

No. A VLAN is only one component of the architecture. Security also depends on firewall policy, credentials, firmware, remote access, administrator accounts, physical security, monitoring, and device lifecycle. A camera can be on a dedicated VLAN and still be badly configured.

5. Can cameras and an NVR be on different VLANs?

Yes, technically they can. The network must permit whatever communication the camera and recorder require, and the design should account for bandwidth, discovery protocols, and vendor support. In other environments, placing the NVR on the same surveillance VLAN may be simpler.

6. Should an NVR be on the camera VLAN?

It can be, but it does not have to be. Smaller systems often place the NVR with the cameras and allow authorized users to reach the recorder through controlled rules. Larger designs may place the recorder in a dedicated surveillance or server network.

7. Should security cameras have internet access?

Only when they need it. Cloud management, notifications, updates, licensing, cloud recording, or remote-viewing architecture may require internet connectivity. If the deployment works without direct camera internet access, restricting unnecessary outbound communication can reduce exposure.

8. Can I block cameras from the internet?

Sometimes, but verify the architecture first. A locally recorded camera system may function with limited or no direct camera internet access, while a cloud-managed system may depend on outbound vendor connections. Review manufacturer requirements before changing firewall policy.

9. How do cloud security cameras work with VLANs?

Cloud cameras can still be segmented. The VLAN separates them from unrelated internal systems while firewall policy permits the outbound cloud communication they require. The exact destinations and protocols should come from current manufacturer documentation.

10. Should cameras be able to access employee computers?

Usually not without a specific reason. Camera devices normally need access to surveillance infrastructure rather than arbitrary employee endpoints. Authorized employees may need to initiate viewing or management connections in the opposite direction depending on the architecture.

11. Can employees access cameras from another VLAN?

Yes, if the firewall policy permits it. For example, an authorized security or management workstation could be allowed to access the NVR or selected camera-management interfaces while ordinary corporate devices remain blocked.

12. What firewall rules do security cameras need?

There is no universal rule set. Required communication depends on the camera manufacturer, NVR/VMS, streaming technology, cloud services, time synchronization, DNS, remote viewing, and management design. Start by documenting required flows and permit those rather than copying generic port lists.

13. Do cameras need DNS?

Some do. Cameras or recorders communicating with cloud services or other hosts by name may need DNS. Systems using only configured IP addresses may have fewer DNS dependencies. Follow the supported vendor architecture.

14. Do cameras need NTP?

Accurate time synchronization is strongly useful. NTP helps cameras and recorders maintain consistent timestamps, which can matter during incident review, video export, and comparison with access-control, firewall, or other event logs.

15. Should security cameras use static IP addresses?

They need predictable addressing, but static addresses are not the only option. Some environments use static device configuration while others use DHCP reservations. The correct method depends on the NVR/VMS, device-management practices, addressing design, and vendor requirements.

16. Can security cameras use Wi-Fi?

Yes. Business cameras can use Wi-Fi when wireless coverage, security, capacity, and reliability are appropriate. Fixed professional installations often use wired PoE where practical because it provides network connectivity and centralized power through one Ethernet cable.

17. Is a separate physical network better than a VLAN?

Not automatically. Physical isolation can provide stronger separation and may suit highly sensitive environments, but it increases cost and operational complexity. For many businesses, managed switches, a dedicated VLAN, and properly enforced firewall policy provide practical segmentation.

18. Can I put cameras on my guest network?

Usually that is not the best design. Guest networks may use client isolation, captive portals, restricted local communication, or other behavior that interferes with camera and NVR functionality. A purpose-built surveillance VLAN is cleaner.

19. What is PoE?

PoE means Power over Ethernet. It allows compatible switches or injectors to deliver network connectivity and electrical power to cameras over Ethernet cabling. A PoE switch does not automatically provide network isolation; VLAN and firewall configuration still matter.

20. Do I need a managed switch for a camera VLAN?

Generally, yes, somewhere in the switching path you need infrastructure capable of handling the required VLAN configuration. Managed switches allow administrators to configure VLAN membership, trunks, ports, monitoring, and other controls depending on the platform.

21. Does network segmentation stop hackers?

No. Segmentation can reduce unnecessary network paths and limit lateral movement, but it cannot replace secure credentials, patching, MFA where available, monitoring, firewall policy, physical security, backups, and other controls. CISA recommends segmentation as one defensive measure, not a complete solution. (CISA)

22. Can SimplyRem help set up a security-camera network?

Yes. SimplyRem currently publishes capabilities covering IP and analog cameras, DVR/NVR systems, PoE switching, low-voltage and network cabling, network segmentation, firewall architecture, secure remote access, monitoring, network documentation, and broader cybersecurity services. (SimplyRem)

Conclusion

In most business environments, security cameras should not sit on the same unrestricted network as employee computers and sensitive business systems.

A dedicated camera VLAN combined with well-designed firewall rules can create a cleaner security boundary while still allowing cameras, NVRs, cloud services, management systems, and authorized users to communicate.

But don't stop at the VLAN.

Review credentials.

Review firmware.

Understand internet access.

Protect the NVR.

Document the network.

Review installer access.

Test remote viewing.

And make sure somebody actually owns the system after installation day.

The goal is not isolation for the sake of isolation.

The goal is simple:

Give the camera system access to what it needs—and nothing it doesn't.

If your security cameras, NVR, employee devices, printers, phones, servers, and IoT equipment are all sitting on the same network—or nobody is completely sure how they communicate—SimplyRem can review the existing network and camera architecture and help determine what should be segmented, what communication needs to remain, and what infrastructure changes actually make sense.