Application and user awareness
Policy written in terms of applications and identities, not just addresses and ports.
Layered Defence — Layer 3 of 7
The Network Layer
Controlling, inspecting, and segmenting the traffic that connects everything.
Everything in the environment talks over the network — users to applications, devices to servers, sites to the cloud. The Network layer controls that traffic: blocking hostile connections, inspecting what flows in and out, and segmenting the environment so a foothold in one place cannot become access to everything.
As work has spread beyond the office, the network edge has spread with it. This layer now spans two complementary controls: the firewall that hardens and segments the networks you run, and cloud-delivered secure access that applies the same protection to users wherever they connect from.
Next-Generation Firewall
A Next-Generation Firewall (NGFW) integrates advanced security features like IPS, IDS, DNS firewall, and URL filtering, providing comprehensive protection by detecting and blocking threats while controlling web and network traffic.
Traditional firewalls made decisions based on network addresses and ports — useful, but blind to what the traffic actually is. A next-generation firewall is application-aware: it identifies the application generating the traffic regardless of the port it uses, and it ties policy to users and groups rather than just IP addresses. That allows rules like “finance can reach the banking portal; guests can browse the web but reach nothing internal.”
NGFWs consolidate several inspection engines into one enforcement point. An intrusion prevention system watches traffic for the patterns of known attacks and blocks them in real time; DNS filtering stops devices from even looking up known-malicious domains; URL filtering governs web access by category and risk; and TLS inspection allows encrypted traffic to be examined rather than waved through.
Just as importantly, the firewall is the natural place to segment the network — separating servers from workstations, guest Wi-Fi from corporate systems, and operational technology from IT — so that a single compromised device cannot reach everything else.
What to look for
Intrusion prevention (IPS/IDS)
Real-time detection and blocking of known attack patterns and suspicious behaviour in network traffic.
DNS and URL filtering
Blocking connections to known-malicious or inappropriate destinations before a session is ever established.
Encrypted traffic inspection
The ability to inspect TLS-encrypted sessions — where most modern threats hide — with appropriate privacy carve-outs.
Network segmentation
Security zones that contain lateral movement, so a foothold on one segment does not become access to all of them.
Throughput under inspection
Sizing that holds up with all inspection features enabled — advertised speeds often assume features are off.
Secure Access Service Edge
SASE integrates cloud-delivered network and security services, like SD-WAN and Zero Trust, for secure, seamless access to apps and data from any device or location.
SASE (pronounced “sassy”) converges networking and network security into a single cloud-delivered service. Instead of routing every user back through a central firewall — slow for remote workers and expensive to scale — users connect to a nearby cloud point of presence that applies the organization’s security policy wherever they are.
A SASE platform typically combines several capabilities that were once separate products: software-defined WAN for connecting sites, a secure web gateway for filtering internet traffic, a cloud access security broker for visibility into SaaS usage, and Zero Trust Network Access, which grants access to specific applications based on identity rather than placing users on the whole network the way a traditional VPN does.
The practical outcome is consistent security policy for every user — in the office, at home, or travelling — without the bottlenecks and implicit trust of legacy remote-access approaches.
What to look for
Identity-based access
Access decisions tied to who the user is and what they need, not which network they happen to be on — least privilege by default.
Zero Trust Network Access
Per-application access that replaces broad VPN tunnels, so a compromised account or device cannot roam the entire network.
Traffic inspection everywhere
Inline inspection of web and cloud traffic — including encrypted traffic — applied consistently regardless of user location.
SaaS visibility and control
Discovery of sanctioned and unsanctioned cloud applications, with policy to govern how data moves into and out of them.
Consistent policy, one console
A single policy applied across offices, remote users, and cloud destinations, rather than separate rule sets per location.
Part of a Layered Defence
No single technology can protect against every threat. The Network layer works alongside six other security layers, each creating another barrier an attacker has to defeat — and another opportunity to detect them.
- 1. Human
- 2. Devices
- 3. Network
- 4. Identity
- 5. Data
- 6. Monitoring
- 7. Response
How FioSec Helps
Vendor-agnostic by design. We recommend the technologies that fit your environment and objectives, not a fixed product line. Through our partner network, we can then supply and implement whatever you choose.
FioSec provides professional services to help organizations assess risk, deploy cybersecurity technologies, and strengthen their overall security posture — from assessment and design through implementation, integration, and ongoing support.