Protecting your company’s digital perimeter is more important than ever in today’s technologically advanced world. Strong gateway security solutions are now essential since government and corporate infrastructure are being targeted by increasingly complex threats.
At ARANKISH, we help businesses and public sector agencies across Australia stay ahead of evolving cyber risks. Here’s what you need to know about the latest executive guidance on gateway security, based on the Australian Government’s 2025 Gateway Security Guidance Package.
What is a Gateway in Cyber Security?
An essential boundary system that divides various security domains, like the internet and your internal network, is a gateway. In order to transfer data between these domains, it enforces organisational security policies. Modern gateways offer a multi-layered approach as part of a defense-in-depth cyber security strategy, and they are much more than just firewalls.
Gateways are responsible for:
- Controlling the flow of sensitive data
- Enabling secure remote work and information sharing
- Protecting against untrusted networks
- Applying risk-based controls and mitigations
Why Gateway Security Matters Now More Than Ever
Malicious activity targeting edge devices, including routers, firewalls, and VPN concentrators, has increased, according to the Australian Signals Directorate (ASD). These gadgets, which are frequently integrated into gateways, may serve as points of entry for online criminals. They give access to sensitive data and internal systems if they are compromised.
Key risks include:
- Exploitation of unpatched vulnerabilities
- Bypass of perimeter defences
- Data interception and exfiltration
Executive leaders are now expected to take greater accountability for cyber risk management. Implementing secure gateways is no longer optional—it’s a strategic imperative.
What the 2025 Gateway Security Standard Means for You
The Gateway Policy was superseded by the Gateway Standard in the 2025 update. In accordance with the Information Security Manual (ISM) and Foundations for Modern Defensible Architecture, this standard establishes minimal standards for Australian Government organisations and promotes a flexible, risk-based approach.
Notably, it supports the use of modern cloud-native services such as Security Service Edge (SSE). The Gateway Standard forms part of Australia’s broader Resilient Digital Infrastructure strategy under the 2023–2030 Cyber Security Strategy.
Cross Domain Solutions (CDS): When Security is Non-Negotiable
For networks handling classified or sensitive data (e.g. SECRET or TOP SECRET environments), Cross Domain Solutions provide trusted pathways between domains with differing security classifications. CDSs are critical for high-assurance gateways that connect internal environments to the internet while preventing data leaks and unauthorised access.
Organisations handling such environments are urged to consult the ASD and integrate CDS as per updated ISM controls.
Key Takeaways for Senior Leaders
Whether you’re leading a government agency or a private sector organisation working with government systems, here’s what you need to prioritise:
- Understand Gateway Definitions: Know how your organisation’s data flows and what boundaries exist between internal and external networks.
- Adopt a Risk-Based Model: Tailor your controls to your threat environment and operational requirements.
- Stay Compliant with PSPF & ISM: Government organisations must follow the Protective Security Policy Framework and ISM’s six-step cyber security process.
- Engage with IRAP Assessors: Use certified professionals for gateway assessments under the Infosec Registered Assessors Program.
- Keep Systems Patched and Monitored: Ensure gateways and edge devices are up to date with vendor-recommended security updates.
ARANKISH: Your Partner in Defensible Architecture
We at ARANKISH help businesses with gateway design, acquisition, and continuous security. We are here to assist you in creating a resilient digital future, whether you require assistance with IRAP assessments, safe cloud migrations, or high-assurance network boundary construction.
📞 Get in touch today to discuss your gateway security posture and discover how we can assist you with compliance and protection.
Explore our Cyber Security Services to learn more.