› connectivity & telecoms
leased lines & wan
Leased LinesDedicated, uncontended fibreDedicated Internet AccessGuaranteed, SLA-backedFTTP & Full FibreUltrafast full fibreSD-WANIntelligent multi-site WANMulti-Site ConnectivityOne secure networkBackup ConnectivityAutomatic 4G/5G failovermobile
Business MobilesO2, Vodafone & EE airtimeSIM Only DealsFlexible 30-day & 24-monthMobile Broadband4G / 5G data-only SIMsStatic IP SIMsFixed IP for IoT & failovertelecoms
Cloud Hosted PBXVoIP phone system, powered by VoipingerSIP TrunkingConnect your PBX, cut call costsMicrosoft Teams PhoneCalling inside TeamsBusiness Phone NumbersLocal numbers in 145+ countriesCRM Integration250+ apps, click-to-dialAI Receptionist24/7 AI voice agentAI Contact CenterAI voice & chat at scale› cyber security
Wifinger
Our own guest Wi-Fi platform: a branded login page on the access points you already have, plus consent, analytics and marketing — designed, installed and managed by us.
Explore guest Wi-Fi› design · deploy · support
› surveillance & data infrastructure
Threat protection built into your network
Next-gen firewalls, zero-trust segmentation and secure SD-WAN — designed, deployed and monitored 24/7. We're vendor-agnostic: Fortinet, Cisco, Aruba and more, chosen to fit your business.
Blocked at the edge
12,940
threats · last 24h
Firewalls healthy
Policies up to date
24/7
Managed firewall monitoring
Multi-vendor
Fortinet, Cisco, Aruba & more
Zero-trust
Segmentation & ZTNA
London
UK-based engineers & SOC
Network Security
Speak to a security specialist
Free assessment · no obligation · 24/7 UK SOC
› the network is the perimeter
A flat network is a fast-spreading one
Once an attacker is inside a flat network, one compromised device can reach everything. We design segmented, zero-trust networks and enforce them with next-gen firewalls — so a breach is contained, not catastrophic.
- Zero-trust segmentation to contain lateral movement
- Next-gen firewalls with IPS, web & DNS filtering
- Managed and monitored 24/7 by our London SOC
zero-trust segmentation · live
ContainedLateral movement blocked
IoT breach can't reach Finance or Servers · 0 spread
› what's included
End-to-end network protection
From the internet edge to every internal segment and remote worker — secured, managed and monitored by CLI Secure.
Next-gen firewall management
Design, deploy and manage NGFWs with tuned policies, IPS and deep packet inspection.
Intrusion prevention (IPS/IDS)
Block exploits and lateral movement with signatures and behavioural detection.
Secure SD-WAN
Fast, resilient multi-site connectivity with security baked into every link.
Network segmentation
Contain breaches by isolating users, devices and workloads into secure zones.
VPN & Zero-Trust (ZTNA)
Give staff secure remote access based on identity, not a flat network.
Web & DNS filtering
Stop malware, phishing and risky sites before they ever reach a device.
Wireless security
Segmented, authenticated Wi-Fi with rogue-AP detection across your sites.
DDoS & edge protection
Keep your services online and shrink your internet-facing attack surface.
24/7 monitoring & response
Our SOC watches firewall and network telemetry and acts on real threats.
› vendor-agnostic by design
We secure your stack, whatever the brand
We're certified across the industry's leading vendors and choose the right fit for you. Need the underlying network designed or built too? Explore our Network Consultancy.
› design + build + secure
Need the network designed and built, not just secured?
Our Network Consultancy team delivers Cisco, Aruba, Fortinet and Grandstream infrastructure end-to-end — then we secure and monitor it for you.
› how we deliver
Assess, design, deploy, monitor
Assess
We audit your firewalls, segmentation, remote access and exposure.
Design
A vendor-right architecture with zero-trust segmentation by design.
Deploy
Clean rollout and policy hardening with minimal disruption.
Monitor
Ongoing management, tuning and 24/7 threat response.
“They didn't push a brand on us — they audited what we had, segmented the network properly and now manage the firewalls so we don't have to. Our auditors were impressed.”
Head of IT
Multi-site retailer · London
› free assessment
See how exposed your network is
Book a no-obligation network security review. We'll check your firewalls, segmentation and remote access, and recommend a vendor-right plan.
- 30-minute call with a network security engineer
- A clear view of your real exposure
- Vendor-neutral recommendation & quote, no pressure
Why run network security with CLI Secure
Vendor-certified
Certified across Fortinet, Cisco and Aruba — we recommend the right fit, not one brand.
Managed for you
We own the policies, updates and monitoring so nothing drifts out of date.
Compliance ready
Segmentation and logging aligned to Cyber Essentials & ISO 27001.
24/7 response
Our London SOC acts on network threats the moment they appear.
› faq
Network security, answered
› let's talk
Ready to hand off the IT headaches?
Leave your details and a London-based engineer will call you back — usually within one business hour. No sales scripts, no obligation.
Or explore Managed IT →