XONA Critical System Gateway (CSG)
IoT security solutions
OT secure remote access software
Zero trust networking software
System security software
Zero trust architecture software
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What is XONA Critical System Gateway (CSG)
XONA Critical System Gateway (CSG) is a secure remote access gateway designed for operational technology (OT) and industrial control system environments. It brokers and controls remote connections to critical assets such as PLCs, HMIs, and engineering workstations, typically for maintenance, vendor support, and incident response. The product emphasizes identity-based access, granular authorization, and session controls aligned to zero trust principles rather than network-level VPN access. It is commonly deployed in regulated or high-availability environments where access needs to be audited and tightly segmented.
Purpose-built for OT access
CSG focuses on remote access workflows common in industrial environments, including access to engineering tools and control system endpoints. It is designed to reduce reliance on broad network VPN access by brokering connections to specific assets. This aligns with common OT security requirements for segmentation and least-privilege access. It fits use cases where uptime constraints and change control limit the feasibility of endpoint agents.
Granular policy and segmentation
The gateway model supports fine-grained authorization that can be scoped by user, asset, protocol, and time. This helps organizations implement least privilege and reduce lateral movement risk compared with flat remote-access approaches. It also supports segmentation patterns that separate IT users, vendors, and site operations. These controls are relevant in environments that must demonstrate access governance and separation of duties.
Session governance and auditability
CSG is oriented around controlled sessions rather than persistent network tunnels, which supports stronger oversight of remote activity. It provides mechanisms that can support auditing and investigation of remote access events. This is useful for organizations that need traceability for compliance, incident response, or third-party access management. The approach complements monitoring-focused OT security platforms by addressing the access control plane.
Narrower scope than full platforms
CSG primarily addresses secure remote access and does not replace broader OT security capabilities such as passive asset discovery, deep protocol anomaly detection, or full network detection and response. Organizations often still need separate tools for continuous visibility and threat detection across the OT network. This can increase overall architecture complexity. Buyers should validate integration points with existing monitoring and SIEM tooling.
Deployment and integration effort
Implementing a gateway-based access model typically requires upfront design work for network segmentation, routing, and identity integration. Industrial environments may have legacy architectures that complicate placement of gateways and enforcement of least-privilege policies. Operational teams may need process changes for vendor access and maintenance workflows. These factors can extend time-to-value compared with simpler remote access tools.
May not cover all access types
Some OT use cases require specialized protocols, jump-host patterns, or offline/air-gapped procedures that may need additional components or compensating controls. If users need broad administrative network access, a session-brokering approach can be perceived as restrictive. Organizations should confirm protocol support, high-availability options, and how the product handles emergency access. Coverage can vary depending on site topology and asset types.
Seller details
XONA Systems, Inc.
Private
https://xonasystems.com/
https://x.com/xonasystems
https://www.linkedin.com/company/xona-systems/
