Advanced Network Security
L3-L7 threat prevention with in-line IPS, east-west micro-segmentation and encrypted-traffic visibility via TLS interception. Central policy management across distributed sites so malicious traffic is blocked in motion rather than discovered post-breach via log analysis.
Overview
A standard firewall at the perimeter is no longer sufficient — modern threats bypass perimeter defences through encrypted traffic, application-layer attacks, and legitimate credentials. Advanced Network Security provides a layered defence-in-depth architecture that inspects traffic at every network boundary — perimeter, internal segmentation, data centre, cloud edge, and remote access — with next-generation firewall capabilities, intrusion prevention, TLS decryption, and network detection and response across every point traffic crosses.
Clevertek scopes every engagement to your environment — capacity, sites, compliance and support model — so you get a tailored plan rather than a fixed SKU. Pricing is quote-only, and our solutions architects will work through your requirements before any proposal.
Our approach
We design and deploy a multi-layer network security architecture tailored to your traffic patterns, application mix, and compliance requirements. Every network boundary — internet edge, site-to-site WAN, data centre segmentation, cloud virtual networks, and remote access — gets the appropriate security controls: NGFW with application-level inspection, IPS with signature and behavioural detection, TLS/SSL decryption for encrypted traffic inspection, and NDR sensors for lateral movement detection. Policies are centralised, traffic is inspected everywhere, and management is unified across the entire security fabric.
Why work with us
Multi-layer defence-in-depth
Security at every boundary — internet edge, site-to-site, data centre segmentation, cloud VPC, and remote access — not a single perimeter firewall.
TLS/SSL decryption at scale
Encrypted traffic decrypted for inspection at the perimeter — 50-70% of modern attacks use encryption to bypass traditional security controls.
Application-level inspection
NGFWs identify and control applications by signature, not by port — enforcing policies for sanctioned apps while blocking shadow IT and high-risk services.
Network detection and response
NDR sensors at internal network segments detect lateral movement, beaconing, and data exfiltration — threats that the perimeter firewall never sees.
Centralised policy management
All security policies managed from a single console — consistent rules across perimeter, internal, data centre, and cloud boundaries.
Unified threat visibility
All security events — firewall, IPS, NDR, DNS security — correlated into a single incident timeline with cross-source alert correlation.
Key benefits
What this solution delivers for your business.
Defence against encrypted threats
TLS decryption at the perimeter inspects traffic that would otherwise pass through with complete visibility — malware C2, data exfiltration, and phishing payloads in encrypted sessions detected.
Contain lateral movement
Internal NDR sensors detect an attacker moving between systems after the perimeter is breached — lateral movement detection is your last line of defence.
Application-aware policy enforcement
Block high-risk applications, enforce bandwidth limits on recreational services, and ensure business-critical applications have guaranteed capacity — all at the network level.
Reduced dwell time
Multi-layer detection catches threats at different stages of the attack chain — initial access through perimeter IPS, lateral movement through NDR, exfiltration through DLP — reducing time between compromise and detection.
Simplified compliance evidence
Centralised policy management and unified logging provide straightforward compliance evidence for PCI DSS, HIPAA, SOC 2, and ISO 27001 network security requirements.
Scalable security without per-location complexity
Consistent policies across all locations — headquarters, branches, data centres, cloud — enforced from a central management plane without per-site firewall configuration.
What's included
Part of this managed service.
Next-generation firewall (NGFW)
Stateful inspection with application-level control, user identity awareness, and integrated IPS.
- Application identification
- User/group-based policies
- Integrated IPS
- TLS/SSL decryption
Intrusion prevention (IPS)
Signature-based and behavioural detection for known exploits, zero-day attacks, and protocol anomalies.
- 5,000+ IPS signatures
- Behavioural detection
- Protocol anomaly detection
- Automated blocking
Network detection and response (NDR)
Internal NDR sensors detect lateral movement, beaconing, data exfiltration, and DNS tunnelling.
- Internal segment deployment
- Machine learning detection
- C2 and beaconing detection
- DNS security
Network segmentation
Micro-segmentation policies enforced at the network level — user segments, server segments, OT segments, guest segments.
- VLAN and zone segmentation
- Inter-zone firewall policies
- Micro-segmentation
- Zero-trust network segments
Centralised management and logging
Single policy manager and log aggregator for all network security devices — perimeter, internal, data centre, and cloud.
- Centralised policy management
- Unified logging
- SIEM integration
- Compliance reporting
Where it helps
Real-world scenarios where this solution delivers measurable outcomes.
Zero-trust network architecture
Deploy network security controls aligned to zero-trust principles — micro-segmentation, identity-based access, encrypted traffic inspection, and continuous verification at every access point.
Data centre and cloud edge security
Extend advanced network security to data centre and cloud environments — consistent NGFW policies, IPS, and NDR across on-premise data centres and AWS/Azure/GCP virtual networks.
Remote access security upgrade
Replace basic VPN with identity-aware, inspected remote access — TLS-decrypted, IPS-protected, and NDR-monitored connectivity for remote users.
Questions buyers actually ask
What is the difference between NGFW and traditional firewall?
Traditional firewalls filter by port and protocol. NGFWs add application identification (identifies apps by behaviour, not port), user/group awareness (integrated with AD/IdP), and integrated IPS.
Does TLS decryption impact performance?
Modern NGFWs have dedicated hardware for TLS decryption. Performance impact is typically 5-15% on throughput — modern appliances are sized to handle full decryption at wire speed.
Can I deploy this alongside my existing firewall?
Yes. We can deploy NGFWs at internet edges while integrating with existing internal firewalls. Or replace a perimeter-only firewall with a multi-layer architecture.
How does this support remote users?
Remote users connect through ZTNA or VPN that terminates on the NGFW — traffic is decrypted, inspected by IPS, and subject to the same policies as on-site traffic.
Ready to scope a solution?
Talk to a Clevertek solutions architect about your requirements — no obligation.