IoT Security Solutions: How to Protect Connected Devices in Your Organisation

IoT security solutions are the combined tools and practices, device discovery, network segmentation, patching, monitoring, that protect internet-connected devices from becoming an organization’s weakest, least-visible entry point.

Connected devices multiply an organization’s attack surface faster than most security teams can inventory them, since a single new smart device, a printer, a badge reader, a thermostat, can join the network without IT ever knowing it exists.

Why Connected Devices Are a Growing Risk

Weak Default Credentials and Firmware

Universal default passwords remain the single most exploited IoT weakness, exactly why the UK’s PSTI Act now bans them outright for any connectable product sold in the country.

Botnets and DDoS Recruitment

Compromised IoT devices get recruited into botnets that scan for and infect further vulnerable devices, then launch coordinated DDoS attacks using the combined, hijacked processing power.

Shadow IoT and Unmanaged Devices

Devices connected without IT approval create the exact visibility gap attackers exploit, since a device nobody knows exists is a device nobody is monitoring or patching.

The Most Vulnerable Connected Device Categories

Cameras, smart TVs, printers, badge readers, and building management systems consistently rank among the most exploited categories, since they combine internet connectivity with infrequent firmware updates and weak default configuration out of the box.

IoT Security Framework: Standards and Regulations to Know

IoT security framework requirements now diverge sharply by region: the US relies on voluntary guidance manufacturers can choose to follow, while the UK and EU have moved to binding legal requirements with real enforcement behind them.

US Frameworks: NIST CSF 2.0, NISTIR 8259 and CISA CPG 2.0

NISTIR 8259 provides voluntary, foundational manufacturer guidance covering device identity, secure updates, and data protection, forming the technical basis for the IoT Cybersecurity Improvement Act of 2020 and the FCC’s consumer-facing Cyber Trust Mark programme. CISA’s CPG 2.0 and NIST CSF 2.0 provide the operational, organization-side complement to this manufacturer-focused guidance.

UK Frameworks: NCSC Code of Practice and the PSTI Act

The PSTI Act, in force since April 2024, makes IoT security legally mandatory rather than voluntary, banning universal default passwords and requiring manufacturers to disclose minimum security update support periods. It’s derived directly from NCSC’s Code of Practice for Consumer IoT Security and ETSI EN 303 645, the first globally applicable consumer IoT security standard. The EU’s Cyber Resilience Act extends similar binding requirements across the full product lifecycle, not just point of sale.

Core Capabilities of an Effective IoT Security Solution

Device Discovery and Inventory

You cannot secure what you cannot see, making automated device discovery the genuine starting point before any other control matters.

Network Segmentation

Isolating IoT traffic onto its own segment limits how far a compromised device can reach into core business systems.

Vulnerability and Patch Management

Firmware updates often go unmanaged specifically because IoT devices sit outside standard patch management workflows built for laptops and servers.

Behavioural Monitoring

Watching for unusual traffic patterns, a smart thermostat suddenly making external connections, catches compromise that signature-based tools miss entirely.

What Is a DNS Record? How DNS Security Protects IoT Devices

DNS record is a piece of data telling the internet how to route traffic for a domain, and DNS security protects IoT devices specifically by blocking the domain lookups compromised devices need to reach botnet command-and-control servers.

What Are DNS Records? (A, AAAA, CNAME, TXT, MX)

An A record maps a domain to an IPv4 address; AAAA does the same for IPv6. CNAME creates an alias pointing one domain to another. TXT holds arbitrary text data, commonly used for email authentication. MX specifies which servers handle a domain’s email.

Using DNS Filtering to Block IoT Botnet Traffic

Botnet malware typically needs to resolve a command-and-control domain before receiving instructions, meaning DNS filtering blocking known-malicious domains breaks that communication channel even without removing the underlying infection directly.

Should IoT Devices Be on a Separate Network?

Yes. Placing IoT devices on a dedicated, segmented network prevents a single compromised device from reaching core business systems, customer data, or financial applications, containing damage to the isolated segment alone.

Retail Cyber Security Solutions for POS and IoT Devices

Retail cyber security solutions must specifically address POS systems and connected devices together, since payment terminals increasingly share network infrastructure with smart cameras, digital signage, and inventory sensors, all of which fall under PCI DSS scope the moment they share a network segment with cardholder data. Segmenting IoT devices away from POS traffic specifically keeps compliance scope narrow and genuinely limits breach impact if a lower-value device gets compromised first.

IoT Security Best Practices Checklist

Change every default password immediately, maintain a current device inventory, segment IoT traffic onto its own network, apply firmware updates on a defined schedule, and monitor for unusual outbound connections continuously rather than periodically.

How Cyber Security Solutions Ltd Secures Your Connected Devices

Cyber Security Solutions Ltd builds exactly this discovery-through-monitoring stack for clients managing genuinely diverse connected device fleets, starting with the network segmentation most organizations discover they never properly implemented.