Malware and content filtering that blocks threats automatically. Secure VPN access for remote workers, anywhere in Australia. Firewall protection without the IT overhead.

Cyber attacks on Australian small businesses are rising. The Australian Signals Directorate received over 84,700 cybercrime reports to cyber security incidents in 2024-2025. SMBs are targeted because attackers assume they have no protection.


Most small business internet plans offer a modem and nothing else. Enterprise-grade security that includes firewalls, VPNs, and intrusion prevention features typically costs thousands extra per year and requires an IT team to manage.
Calystro Business Internet combine business-grade internet with a managed secure gateway that constantly scans for malware and threats. Intrusion prevention, malware protection, content filtering, GeoIP blocking, and a Layer 7 firewall. Monitor what’s going on with your network security through an intuitive web-based dashboard. No IT team required. We manage it for you.

Yes. Australian small businesses are increasingly targeted by cybercriminals precisely because they are assumed to have minimal protection. The Australian Cyber Security Centre (ACSC) reported that small businesses accounted for a significant proportion of cyber incidents in recent years. Enterprise-grade security provides the same protection used by large organisations, without requiring an in-house IT team.
A basic modem routes internet traffic. A Secure Gateway does that plus inspects all traffic for threats (intrusion prevention), filters web content, blocks traffic from high-risk countries (GeoIP blocking), and provides a secure VPN tunnel for remote workers. It's managed centrally by Calystro, with automatic security updates and proactive monitoring included.
With Calystro Business Internet Secure plans, the full security stack is included in your monthly internet subscription. There are no separate security licences and no IT consultant required to manage it. Calystro takes care of the configuration, applying security updates, and monitoring as part of the managed service.
Our team is available to help. Reach out and we can explore how Calystro solutions can help you achieve your goals.
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Calystro Pty Ltd
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