From Default Passwords to Zero‑Trust: How All‑Optical‑Networks Fortify the First Line of Enterprise Cybersecurity

When enterprise cybersecurity is mentioned, many people immediately think of firewalls, antivirus software and intrusion‑detection systems. It seems that as long as the network egress is secured, the internal corporate network will remain safe. Yet real‑world cyberattacks do not always commence with a frontal breach from the public internet.

An unchanged default password, an unmanaged surveillance camera, or an arbitrarily accessible network port can all serve as entry points for threats into corporate infrastructures. Especially within enterprise parks, the growing volume of office PCs, wireless APs, surveillance cameras, access‑control units, printers, conference terminals and diverse IoT devices has transformed networks from small‑scale PC‑only connectivity into complex environments populated by vast numbers of users and endpoints.

Under such circumstances, enterprises must look beyond “whether external attacks can penetrate the perimeter”. They need full visibility into what devices exist on‑premises, who is permitted to connect, and what resources each connected entity may access.

From this perspective, the first line of enterprise cybersecurity ought to be shifted forward to the network‑access layer.

I. Default Passwords: Breach Points in Enterprises’ “First Security Line”

Unmodified default passwords leave devices wide‑open

Enterprise parks host large‑scale, widely‑distributed network hardware that often runs continuously post‑installation. While office computers receive regular maintenance, dumb terminals such as surveillance cameras and access‑control hardware may go long periods without manual inspection.

If such devices retain factory‑set default credentials, ordinary endpoints can become stepping‑stones for attackers to pivot deeper into the network.

Traditional perimeter‑based defence cannot police internal threats

Conventional cybersecurity operates on a “wall‑building” logic: erect a robust network boundary to block external intruders while implicitly trusting all insiders.

This paradigm suffers from two fatal flaws.

First, perimeters cannot stop internally‑originated attacks. A single employee click on a phishing email can grant attackers access to the internal network. Hackers can log into a camera using unmodified default passwords within seconds and move laterally toward core business systems.

Second, unconditional trust in everything inside the network represents the biggest vulnerability of perimeter defence. Once adversaries cross the boundary, they can access OA, ERP and financial databases just like legitimate staff. Real‑world damage stems from east‑west traffic: lateral movement between internal computers, or from office networks onto production networks — traffic that firewalls allow by default. In one real‑world manufacturing‑enterprise incident, hundreds of park‑based cameras retained factory default passwords. Attackers gained entry via one camera and laterally compromised OA systems and financial databases.

The perimeter‑centric era is fading. The first line of defence can no longer reside solely at the network gateway.

Escalating compliance pressure: MPS Order No. 176 enters into force

Unchanged default passwords, lack of internal‑network segmentation and insufficient log retention are evolving from hidden vulnerabilities into grounds for regulatory penalties.

On 7 August 2026, the Ministry of Public Security officially issued the Measures for Public‑Security‑Organs Supervision and Inspection of Cyberspace Security (MPS Order No. 176), effective 1 October 2026. Containing 23 articles, the new regulation expands oversight scope from “internet security” to “cyberspace security”, covering network operators, data processors, personal‑information processors and all other relevant entities.

Default‑password vulnerabilities, failed perimeter‑defence mechanisms and non‑compliance all stem from one root cause: security safeguards are loose at the source.

II. How All‑Optical‑Networks Build a Robust First‑Line Defence

For enterprises, zero‑trust cannot be realised merely by deploying one standalone system. It first requires a well‑defined, manageable network foundation. AINOPOL enterprise‑park all‑optical‑networks sort out relationships among users, terminals, ports and business services starting right at the network‑access layer.

Three‑tier admission control: block devices with default passwords from gaining access

AINOPOL implements a three‑tier admission mechanism: 802.1X port access control + MAC whitelisting + identity‑based authentication.

• Office endpoints: Every PC connecting via Ethernet or Wi‑Fi must pass 802.1X plus identity authentication; invalid credentials block network access entirely.
• Dumb terminals: For cameras, access‑control hardware, PLCs and other devices incapable of running client software or accepting user logins, physical ONU‑port‑to‑MAC‑address binding locks each device to its dedicated port. If a camera is unplugged and replaced with a laptop, the network instantly detects the anomaly and terminates connectivity.
• Mandatory endpoint‑compliance checks: Devices using default or weak passwords are directly blocked from joining the network, forcing administrators to reset factory credentials before deployment.

Within the all‑optical‑network architecture, ONUs sit at edge‑access points. Office workstations, cameras, access‑control hardware and wireless APs connect to the park network via ONUs, with centralised management handled by the OLT. Compared with multi‑tier aggregation across stacked switches in legacy park networks, this design delivers far clearer visibility on the access side.

Business‑domain segmentation: contain threats even after initial access

There is no necessity for all enterprise devices to share identical network environments. Office PCs require access to corporate work systems; cameras communicate with video‑management platforms; guests primarily require internet access — their business requirements are inherently distinct.

Leveraging VLAN and other network technologies, AINOPOL all‑optical‑networks logically segregate office‑service, guest‑network and security‑monitoring traffic. Though underpinned by one unified optical‑fabric infrastructure, different service categories operate within isolated network spaces with defined access boundaries. Guest users complete Portal‑based authentication onto an independent guest network instead of directly joining the corporate office LAN. Dumb terminals such as cameras and access‑control hardware reside within dedicated security subnets, segregated from employee workstations.

Even if the office network becomes compromised, lateral traffic cannot spread to production‑network assets.

End‑to‑end auditing: traceable accountability for security incidents

Full collection and persistent retention of connection‑logs and traffic‑access‑logs record exactly who accessed which device, at what time and from which location. Hardware‑native compliance‑grade log storage enables encrypted local retention of internet‑audit logs, strictly satisfying the statutory 180‑day minimum‑retention requirement. Log records comprehensively capture MAC addresses, IP addresses, authenticated accounts, timestamps, accessed URLs and other critical fields.

During regulatory inspections, standard‑format compliance reports can be exported with one click, eliminating ad‑hoc manual log assembly.

For modern‑day enterprises, secure, streamlined and controllable all‑optical‑networks serve not only as foundational infrastructure for digital transformation, but also as core safeguards against internal‑network threats, regulatory fines and breach risks. Enabling the shift from reactive to proactive protection and from static‑perimeter defence to full‑domain governance, deep integration between all‑optical‑networks and zero‑trust principles reshapes enterprise‑park cybersecurity architectures and underpins stable digital‑business operations.

FAQ

Q: What is the maximum corporate fine under the revised Cybersecurity Law?
A: Maximum corporate penalties have risen from hundreds‑of‑thousands up to 10 million RMB. Responsible individuals may face fines as high as 1 million RMB. One rural‑commercial‑bank received a 524 500‑RMB fine for failing to remediate weak‑password risks; another enterprise was penalised 2.64 million RMB for prolonged unaddressed high‑risk vulnerabilities.

Q: What are the key differences between MPS Order No. 176 and the former Order No. 151?
A: Issued 7 August 2026 and effective 1 October 2026, Order No. 176 (Measures for Public‑Security‑Organs Supervision and Inspection of Cyberspace Security) repeals Order No. 151. Expanding regulatory oversight beyond “internet security” to full “cyberspace security”, its 23 articles apply to network operators, data processors, personal‑information processors and all relevant entities.