25 Years Securing Business Networks

Ransomware-as-a-service, supply chain compromise, credential theft, insider threats — the landscape has changed beyond recognition since our technical director started doing this in 1999. What hasn't changed is the need for someone who actually understands your network to stand between it and everything trying to get in.

Custodia sits between your internet connection and your internal network, providing managed security services that work with any provider and any layout.

  • Managed firewalls and access control
  • Intrusion detection and prevention
  • 24/7 threat monitoring and response
  • Traffic analysis and anomaly detection
  • Access logging and audit trails
  • Incident response and containment

All built on open source software for complete transparency — no black boxes, no vendor lock-in.

Cyber Essentials & ISO27001 certification

More and more contracts now require Cyber Essentials as a minimum — and if you're tendering for public sector work, it's mandatory. Custodia takes you through the entire process, from initial assessment to certification and beyond.

We cover both levels:

  • Cyber Essentials — the self-assessment baseline covering firewalls, secure configuration, access control, malware protection and patch management
  • Cyber Essentials Plus — the hands-on technical audit that proves your controls actually work in practice

We handle the technical remediation, not just the paperwork. If your firewall rules are a mess or your patching is six months behind, we fix that first — so you pass the assessment rather than just filling in a form and hoping for the best.

Need IASME Governance? We do that too. It's increasingly requested by larger clients and includes GDPR compliance as standard.

For organisations with more demanding requirements, we also support ISO 27001 readiness — mapping our managed security services onto Annex A controls, building the documentation and technical evidence, and helping you maintain your ISMS year on year. Talk to us if your clients or supply chain are starting to ask about it.

Compliance That Actually Works

From Cyber Essentials through to IASME Governance, we bring your business up to the standard your clients and regulators expect. GDPR, industry frameworks, supply chain requirements — we handle the technical controls so you can demonstrate competence without drowning in paperwork.

Our network monitoring means that when something does go wrong, you can recognise the intrusion, provide forensic evidence and audit trails, contain the breach, and meet your 72-hour reporting obligation — because you've had the right systems in place all along, not because you're trying to retrofit them in a crisis.

By monitoring your environments around the clock, breaches are detected, contained and responded to quickly — reducing the financial, operational and reputational damage that comes from finding out too late.

Why Managed Security

✔ Accelerates Cyber Essentials and Cyber Essentials Plus certification
✔ Improves your security posture without hiring a full-time team
✔ Reduces capital and operational costs versus doing it in-house
✔ Provides current expertise and technology without ongoing training overhead
✔ Includes rapid on-site restore from air-gapped backups for complete ransomware protection

Find out how we can help your business

Get in touch with us today

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Call us on
01629-369250

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Email us at
[email protected]