Factories Facing Ransomware Risks & Order No.176 Inspections: Add Visitor-side Security Auditing on Top of Basic Networking

Driven by digital transformation, factory networks now extend far beyond office internet access to cover production management, video surveillance, access control, equipment maintenance and more. Interconnected systems boost collaboration efficiency, yet they also bring more complex security risks. A single infected PC can become an entry point for attackers to scan the internal network, steal data and disrupt production.

Meanwhile, Order No.176 of the Ministry of Public Security (Measures for Cyberspace Security Supervision and Inspection by Public Security Organs) took effect on October 1, 2026. Connected entities must prioritize cybersecurity governance, user information and access log retention, attack prevention and vulnerability remediation.

Deploying switches, firewalls and Wi‑Fi does not equal a complete security system. Visitor Wi‑Fi, temporary access for outsourced technicians and maintenance terminals must also be brought under management. Building proactive protection, visitor audit and network isolation on existing infrastructure has become an indispensable part of factory network construction.

I. Key Security Challenges for Factory Networks

1. Ransomware may spread laterally across the internal network
   Ransom attacks are rarely limited to one endpoint. Once attackers gain a foothold, they scan other terminals, exploit vulnerabilities or weak passwords to escalate privileges, and target file servers, office platforms and production management systems. Without effective access controls, a localized breach can escalate into large‑scale production downtime.

Factories cannot rely solely on endpoint antivirus software and egress firewalls. They also need visibility into malicious traffic, suspicious files, web vulnerabilities and clear access boundaries between different business zones.

1. Poor visitor network management creates easy attack entry points
   Visiting clients, suppliers, contractors and maintenance staff often require temporary internet access. Risks emerge if visitor accounts remain permanently valid, terminal identities are unconfirmed, or unnecessary communication exists between the visitor network and the corporate office network.

Even a separate SSID for visitor Wi‑Fi does not guarantee real isolation. Enterprises must verify whether access policies are enforced and whether unknown endpoints can reach restricted resources.

1. Order No.176 compliance requires more than real-name authentication alone
   Inspection items under Order No.176 include cybersecurity management systems, user registration and access log retention, attack defence, vulnerability remediation and data security.

For factories offering visitor internet access, captive portal authentication is only one requirement. Inspectors also verify retrievable logs, anomaly detection, clear network boundaries and closed-loop remediation of security risks.

II. How AINOPOL Supplements Security Capabilities Beyond Basic Networking

1. Dream Gateway integrates IPS, WAF and AV for proactive threat defence
   Basic routing and access control are insufficient against sophisticated attacks. The AINOPOL Dream Gateway consolidates multiple security modules to defend against network intrusions, malicious files and web‑based exploits.

• IPS Intrusion Prevention: Powered by over 10,000 signature rules to identify and block common network attacks, limiting risks from vulnerability exploitation and reconnaissance scanning.
• AV Antivirus Engine: With a 4‑million+ malware signature library to detect and intercept malicious files, blocking viruses and trojans before they spread inside the network.
• WAF Web Application Firewall: Protects internal web systems against SQL injection, XSS and other typical web attacks.

IPS focuses on network‑level threats, AV on malicious file detection, and WAF on application security. Factories with office portals, production platforms and visitor networks can tailor protection policies based on traffic paths and business priorities.

Important note: These functions do not replace endpoint security, vulnerability patching or data backups. Factories should maintain firmware updates, least‑privilege access and regular recovery drills to build multi‑layer ransomware defence.

1. Visitor real-name authentication and log audit for traceable access records
   Proactive defence blocks known threats, while visitor management answers critical audit questions: Who connected, when, and can we retrieve the records?

Combining the Dream Gateway and Portal authentication platform, AINOPOL enforces identity verification and permission control for visitor access, paired with log auditing to record and retrieve online activity. Factories can establish compliant log retention workflows so administrators can correlate identities, terminal data and network logs during security investigations.

Temporary accounts for visitors, suppliers and contractors can be assigned expiry dates and limited permissions. Unused credentials are revoked promptly to eliminate risks from shared or long‑lived accounts.

Authentication and logging cannot stop every attack by themselves, but they standardize access governance and enable incident tracing. When combined with the gateway’s IPS, WAF and AV protection, the solution delivers both threat interception and full‑process auditability.

1. All‑optical network zoning restricts lateral threat spread to critical assets
   Factory environments mix office PCs, surveillance cameras, access controllers and industrial IoT devices with vastly different security postures. Without segmentation, all endpoints communicate freely and create broad attack surfaces.

AINOPOL all‑optical networking supports VLAN partitioning, access control and endpoint admission management to segregate visitor, office and core production zones. For dumb terminals such as cameras and access controllers that cannot run traditional security agents, whitelisting and access permission controls block unauthorized device connections.

Cross‑zone traffic follows the principle of least privilege; only business‑critical communication paths are permitted, and policy effectiveness is audited periodically. The all‑optical network provides stable transmission infrastructure, while the Dream Gateway delivers embedded security controls to harden network boundaries.

Ransomware defence and Order No.176 compliance are closely linked. Basic networking delivers connectivity; proactive security detects and blocks attacks; visitor‑side auditing adds identity governance, log query and traceability.

Leveraging the integrated authentication and audit capabilities of the Dream Series Secure Optical Gateway, AINOPOL’s All‑in‑One Communication & Encryption solution is built on an all‑optical foundation, audio‑video convergence engine and native security shield. It helps factories build a complete management chain from network admission to threat protection.

Enterprises should regularly review visitor permissions, network isolation, log retention and security policies, alongside endpoint hardening, vulnerability fixes and backup routines. Controlled access, active threat blocking, retrievable logs and traceable incidents together safeguard production continuity and raise the overall cybersecurity maturity of the plant.

FAQ

Q: We already isolate production and office networks. Why manage the visitor network separately?
A: Production-office isolation stops infected office devices from reaching production lines, but ransomware often originates from external laptops brought in by visitors. If the visitor network lacks real-name checks and auditing, reconnaissance and probing activity from compromised guest devices leaves no log trail. Even well‑configured isolation will not alert you to boundary probing. Order No.176 mandates not only segmentation, but also traceability of anomalous behaviour.

Q: Do visitor logs need separate storage from office logs?
A: They can be stored partitioned by security domain, yet identity correlation must remain searchable. In the AINOPOL solution, visitor logs are retained in independent VLAN domains and can be exported separately without mixing with office records. Authentication identities and session logs are bound at session level, so you can pull a full activity history by mobile number without stitching data across disjoint systems.
Visitor audit functions are deployed independently, with unified field standards and retention cycles aligned across the whole network.