Skip to Content

Next-Generation Firewalling

Application-aware inspection. Zero Trust segmentation. Encrypted traffic analysis.
Firewalling designed for how modern networks actually work.

The Challenge

Legacy firewalls see ports and protocols. They can tell you that traffic is flowing on TCP port 443, but they cannot tell you whether that traffic is a legitimate Microsoft Teams session, a file upload to a personal Dropbox account, or command-and-control communication from a compromised endpoint to an attacker's infrastructure. To a legacy firewall, all three look identical.

This fundamental limitation defines the challenge:

  • Applications have moved beyond ports. Thousands of applications — SaaS, cloud, collaboration, development tools — all use HTTP/HTTPS on ports 80 and 443. Port-based access control lists cannot differentiate between sanctioned and unsanctioned applications, between productive use and data exfiltration.
  • Encryption blinds traditional inspection. Over 95% of web traffic is now encrypted with TLS. Attackers use encryption just as legitimately as defenders do. Malware downloads, C2 communication, and data exfiltration all ride on HTTPS. If your firewall cannot decrypt and inspect TLS traffic, it cannot see the majority of threats.
  • Users are not fixed to locations. The perimeter is no longer the office network edge. Users connect from home, from coffee shops, from client sites. They access applications in the cloud, in the data centre, and on SaaS platforms. A firewall that only protects the office perimeter protects a shrinking percentage of your organisation's activity.
  • Lateral movement is the real killer. Most breaches are not smash-and-grab from the outside. The attacker gets in (usually through phishing or credential theft), establishes a foothold, and then moves laterally — from workstation to file server, from file server to domain controller, from domain controller to the crown jewels. Flat networks with no internal segmentation allow this movement to proceed unimpeded.

Traditional ACLs based on source IP, destination IP, and port number cannot address any of these challenges. The firewall architectures that protected networks in 2010 are fundamentally inadequate for the networks and threats of 2026.

The Layer7 Approach

Layer7 designs and deploys next-generation firewall architectures that provide visibility and control at the application layer, enforce Zero Trust segmentation, and inspect encrypted traffic — regardless of where users and applications are located.

Application-Aware Security Policy

Next-generation firewalls identify applications by their behaviour, not their port numbers. This enables security policies that are meaningful:

  • Allow Microsoft 365 but block personal email services
  • Allow Slack for business communication but block file transfers to unapproved cloud storage
  • Allow SSH for administrators but block SSH tunnels used to bypass controls
  • Identify and control over 3,000 applications with granular function-level control

Layer7 designs application-aware policies that align to your business requirements — not generic "block everything and wait for complaints" approaches, but thoughtful policies that enable productivity while controlling risk.

SSL/TLS Decryption and Inspection

If you are not decrypting TLS traffic, you are not inspecting 95% of your network traffic. Layer7 designs and implements TLS decryption architectures that balance security visibility with privacy requirements and performance impact. This includes certificate management, decryption policy design (what to decrypt, what to bypass for privacy or compliance reasons), performance sizing to handle decryption at wire speed, and integration with endpoint trust stores.

Threat Prevention

A next-generation firewall is not just a better packet filter — it is a threat prevention platform. Layer7 configures and tunes the full threat prevention stack:

  • Intrusion Prevention (IPS) — signature-based and behaviour-based detection of exploit attempts, tuned to reduce false positives without missing real threats
  • Anti-malware — inline detection of known malware, with sandbox analysis (WildFire, FortiSandbox) for unknown files
  • URL filtering — category-based web access control with custom policy for your organisation's requirements
  • DNS security — blocking of malicious domains at the DNS layer, before a connection is even established
  • Data loss prevention (DLP) — detection and blocking of sensitive data (credit card numbers, identity numbers, confidential documents) leaving the network

Zero Trust Network Segmentation

Zero Trust is not a product — it is an architecture principle: never trust, always verify. Layer7 implements Zero Trust segmentation that controls traffic between network zones, between application tiers, and between user groups. Every connection is authenticated, authorised, and inspected — not just traffic crossing the perimeter, but traffic moving within the network.

This means that when (not if) an attacker compromises a single endpoint, their ability to move laterally is constrained by segmentation policies that enforce least-privilege access between every zone in your network.

Palo Alto Networks Expertise

As a Palo Alto Networks Platinum Partner, Layer7 brings deep expertise in the PAN-OS ecosystem:

  • PA-Series and VM-Series — hardware and virtual NGFW deployment for data centre, branch, and cloud
  • Panorama — centralised management for multi-site, multi-device environments
  • Cortex XSOAR — security orchestration, automation, and response integration
  • Prisma Access — SASE/SSE for remote user and branch connectivity
  • GlobalProtect — secure remote access with always-on VPN and HIP checks

But we are not a single-vendor shop. We design and deploy next-generation firewall solutions on Fortinet FortiGate, Juniper SRX, Check Point Quantum, and other platforms when they are the better fit for your requirements and budget.

What You Get

  • Architecture design and deployment
  • Zero Trust network segmentation
  • Encrypted traffic inspection design
  • Threat prevention configuration and tuning
  • Panorama / centralised management deployment
  • High availability and disaster recovery
  • Migration from legacy firewall platforms
  • SD-WAN integration
  • Cloud firewall deployment (Azure, AWS, GCP)
  • Ongoing managed firewall services (optional)

Why It Matters

A next-generation firewall is the single most impactful security investment most organisations can make. It provides visibility into what is actually happening on your network — which applications are in use, what threats are being blocked, where data is flowing, and who is accessing what. This visibility is the foundation for every other security decision.

But the technology is only as good as its implementation. A next-generation firewall configured like a legacy firewall — port-based rules, no TLS decryption, threat prevention disabled for performance — is an expensive port filter. Layer7 ensures you get the full value of the platform: application-aware policies, encrypted traffic inspection, tuned threat prevention, and Zero Trust segmentation designed for your specific environment.

Modernise Your Firewall Architecture

Whether you are replacing legacy firewalls or optimising an existing NGFW deployment, talk to our engineering team.

Talk to Our Firewall Engineers