Cameras, Access Control Terminals and IoT Devices Connecting to the Network Without Protection: How to Build Three Barriers of Full-Optical Network Access Control

Dumb terminals such as surveillance cameras, access control systems and IoT devices exist in large quantities in industrial parks yet are frequently overlooked. They come with hardcoded factory passwords, rarely updated firmware, and can access the internal LAN simply by plugging in an Ethernet cable, with no access authentication or compliance inspection implemented — a scenario widely known in the cybersecurity industry as "unprotected naked network access". A compromised surveillance camera often serves as a springboard for hackers to infiltrate office networks and production control networks.

I. Why Dumb Terminals Become Vulnerable Breach Points

Most devices including cameras, switches and NAS storage are preconfigured with default passwords out of the factory. Many parks never modify these credentials after deployment, leaving the "keys in the lock" permanently exposed. Uncleaned test accounts and long-term residual temporary permissions, as well as unrectified weak passwords create blind spots in asset management.

A more prevalent risk lies in the complete lack of terminal access control. Employees privately install routers, portable Wi-Fi hotspots or connect external unknown devices, which directly break network isolation and form hidden backdoors for external cyberattacks. Rogue devices carrying viruses can easily penetrate the internal network.

Cameras and IoT hardware inherently contain numerous vulnerabilities. Once exposed to the public internet or cracked via brute-force attacks on weak passwords, live video data is prone to leakage, and the devices may be hijacked to become nodes of botnets.

II. Severe Consequences After Dumb Terminals Are Compromised

The damage extends far beyond damaged equipment. Attackers will leverage compromised dumb terminals as jump hosts to move laterally across the shared network into office and production domains. Potential outcomes include infected office PCs, tampered production PLCs, remotely unlocked access control doors, and stolen or falsified surveillance footage.

It also constitutes a critical compliance violation. Both Equal Protection 2.0 and Public Security Decree No.151 mandate access control and real-name traceability for all internet-connected terminals. Failure to enforce admission rules or retain default factory passwords will directly result in demerits during official audits. In short, unprotected naked access by dumb terminals is both a severe cybersecurity loophole and a compliance liability.

III. How AINOPOL Constructs the Three-Layer Access Control Barriers

AINOPOL’s protection mechanism for dumb terminals centers on locking down the network entry point. It adopts triple access control: 802.1X authentication + MAC address whitelisting + identity verification to implement full-dimensional governance across three layers: network infrastructure, physical devices and user identities. Unauthorized endpoints are blocked and quarantined in real time to block all unprotected devices from gaining network access.

1. Port-Level Access Control via 802.1X Protocol

Every physical network port requires successful authentication before data forwarding is enabled. Unverified ports are locked down at the network layer to block unknown devices entirely. This layer delivers exceptional protection for fixed-position dumb terminals like switches, cameras and access controllers by binding ports exclusively to registered hardware. Any privately connected third-party device plugged into the port will fail to establish a connection.

2. MAC Address Whitelisting

Only pre-registered MAC addresses on the approved whitelist are granted access. External devices with unfamiliar MAC identifiers are rejected outright even with a physical cable connection. Compulsory endpoint compliance checks are triggered upon link-up: devices running default or weak passwords are immediately blocked from joining the network, forcing administrators to revise factory-set credentials before deployment.

3. Identity Authentication

Bind terminals, system accounts and individual users together. Customize access policies by department, job role and valid time window, with elastic bandwidth throttling or full blocking for non-business traffic. The system automatically triggers alerts and terminates connections upon detecting abnormal activities such as logins from non-whitelisted IPs or repeated password brute-force attempts.

Supplementary closed-loop safeguards are deployed alongside the triple core barriers:

Surveillance traffic is isolated on a dedicated security VLAN, with remote access protected by VPN plus two-factor authentication;

Voice services run on a physically isolated private network with locked extension permissions;

The gateway integrates a next-generation firewall, IPS and WAF, equipped with over 10,000 defense rules and a virus signature library exceeding 4 million entries to deliver comprehensive perimeter protection.

For multi-branch factories and scattered industrial parks, the EAAS cloud management platform centrally governs access policies and MAC whitelists across all sites. Rules are pushed uniformly from the headquarters to guarantee consistent execution standards.

Residual default passwords, missing access controls and unmonitored naked network access for cameras, access control hardware and IoT equipment appear harmless to daily operations, but they easily become key lateral movement entry points for hackers. Consequences range from data leakage and device hijacking to infiltration of office systems and core production lines, triggering business outages and compliance penalties.

AINOPOL’s three-tier access barriers reinforce network entry validation from port, device and identity dimensions to eliminate the chaotic risks posed by unmanaged dumb terminals. Complemented by VLAN hard isolation, integrated next-generation firewall defense and centralized cloud orchestration, the solution closes attack vectors at the source and remedies compliance gaps. It empowers industrial parks to achieve full visibility, auditability and traceability of all endpoints across the entire network, while aligning with cybersecurity stability requirements as well as the mandates of Decree No.151 and Equal Protection 2.0.

FAQ

Q: Is MAC address whitelist maintenance cumbersome?

A: Manual management becomes inefficient when facing large-scale device fleets. We recommend centralized whitelist administration via the EAAS cloud platform. New devices are registered in a unified portal, and policy updates are distributed remotely in the backend without manual configuration on individual switches. Decommissioned hardware can be promptly removed from the whitelist to eliminate residual backdoors.

Q: How to force modification of default passwords on legacy devices?

A: Enforce security baseline validation during onboarding. All connected endpoints must pass password strength audits; hardware retaining factory default passwords or insecure weak passwords will be denied network access, compelling password updates before formal deployment. The platform supports centralized account privilege management, customizable password complexity rules and automatic periodic credential rotation.

Q: Can access control prevent surveillance camera footage from being stolen?

A: Access control blocks unauthorized device spoofing and intrusion attempts at the entry layer. Camera streams are confined to an isolated dedicated security VLAN, and remote viewing requires mandatory VPN tunneling paired with two-factor authentication to block unauthorized external access. Coupled with real-time interception of rogue terminals and anomaly warning mechanisms, the system drastically reduces the risk of video theft and tampering. The final protective effect is subject to on-site deployment schemes and specific terminal hardware models.