Network Security
Most breaches spread to additional systems within an hour of the initial compromise. We segment the network, deploy Zero Trust, and secure routing so one compromised laptop doesn't become a compromised company.
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What does nFlo's network security service cover?
Network security means protecting an existing network infrastructure against attacks — segmentation and microsegmentation to limit lateral movement, Zero Trust architecture (ZTNA/SASE/SSE), DDoS and bot traffic protection, routing security (BGP), and firewall/IPS/IDS deployments. Unlike building a network from scratch, nFlo audits and secures the infrastructure you already have — prioritizing containment of an attack after the first breach.
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Discuss Network Security with your dedicated account manager.
One breach and the attacker is everywhere
A network split into zones an attacker can't cross
Segmentation
Splitting the network into trust zones and microsegments that limit lateral movement
Zero Trust
Verifying every access request — ZTNA, SASE, SSE instead of trusting the internal network
Perimeter Protection
Firewall, IPS/IDS, anti-DDoS protection and bot traffic filtering
What Is Network Security?
Network security is a set of mechanisms and architecture decisions that limit the impact of a breach - segmentation, access control, perimeter protection and a Zero Trust model - deployed on a network the organization already owns.
| Attribute | Value |
|---|---|
| Scope | Segmentation, Zero Trust (ZTNA/SASE/SSE), anti-DDoS, firewall/IPS/IDS, BGP security |
| Distinct from | Network building (LAN/WAN design/deployment), penetration testing, SOC monitoring |
| Deployment | Phased, in maintenance windows, without production downtime |
| Timeline | 2-6 weeks depending on scope |
| Starting point | Audit of existing topology and network traffic |
One Compromised Account and the Attacker Has Access to Everything
A classic scenario: phishing compromises a workstation in accounting. On a flat network with no segmentation, an attacker at that single point has visibility into file servers, ERP systems, and backups - because nothing stops them at the department boundary. The Verizon Data Breach Investigations Report has shown for years that most breaches spread to additional systems within hours, not days.
Without segmentation and access control:
- One compromised workstation = potential access to the entire network
- Lateral movement is invisible because you only monitor the perimeter
- Production servers, backups, and accounting systems sit in the same trust zone as employee laptops
- A DDoS attack on one service can saturate bandwidth for the whole company
A Network Split into Zones Where the Attack Stops
We design architecture where breaching one segment doesn’t mean breaching the whole network. Segmentation and microsegmentation separate trust zones - guests, IoT/OT, workstations, production servers - so traffic between them passes through a control point instead of flowing freely.
What you get:
- Audit of existing topology and network traffic map before any changes
- Segmentation and microsegmentation matched to your organizational structure
- Zero Trust architecture (ZTNA/SASE/SSE) where the network spans remote work or multiple locations
- Perimeter protection - firewall, IPS/IDS, anti-DDoS and anti-bot filtering
- Routing security (BGP) against route hijacking
- Phased deployment, in maintenance windows, without production downtime
Who Is It For?
This service is for you if:
- You have a flat network with no segmentation - one breach means access to everything
- Your company grew to include remote work and external partners, but the access model is still the same as 10 years ago
- You run a publicly accessible service (e-commerce, streaming, portal) and worry about DDoS
- You’re implementing NIS2 or DORA requirements and network segmentation is a gap in your audit
- You already have network infrastructure (your own or one we deployed) and now want it secured, not rebuilt
Zero Trust, SASE, SSE - Is It All the Same?
These are related but distinct layers:
| Model | What It Does | When to Use |
|---|---|---|
| Zero Trust | Principle: no device/user is trusted by default | Foundation of the architecture, regardless of scale |
| ZTNA | Access to specific applications instead of the whole network (VPN replacement) | Remote work, external partner access |
| SASE | Combines networking (SD-WAN) and security (ZTNA, SWG, CASB) into one cloud service | Multi-site companies, distributed branches |
| SSE | The security stack part of SASE without the networking component | Companies that already have SD-WAN and only need the security layer |
We match the model to your organizational structure - full SASE makes sense across many locations; for a single site, ZTNA plus segmentation is often enough.
DDoS and Bot Traffic Protection
Volumetric attacks and bot traffic either saturate bandwidth or overload an application with requests that look like real users. We configure protection at two levels: edge filtering (rate limiting, blackholing) and, for larger volumes, mechanisms on the ISP or CDN side. The right choice depends on whether the service is publicly accessible and what traffic is typical for it.
Related Glossary Terms
Learn more about key concepts related to this service:
How we work
Our proven service delivery process.
Network Audit
Mapping topology, traffic and existing protective mechanisms
Security Design
Segmentation, Zero Trust policies and control points matched to risk
Deployment
Configuring firewalls, NAC, IPS/IDS and DDoS protection in phases, without production downtime
Verification & Handover
Testing segmentation effectiveness, documentation and handover to SOC or client team
Benefits for your business
What you gain by choosing this service.
Attack Contained to One Segment
A breached workstation doesn't mean access to the entire network
Visibility into Lateral Traffic
You know what connects to what inside your network - not just at the perimeter
Deployment Without Downtime
Policy and segment migration phased into maintenance windows
NIS2/DORA Alignment
Segmentation and access control support regulatory network security requirements
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Read more →Frequently Asked Questions
Common questions about Network Security.
How is network security different from network infrastructure deployment?
Network infrastructure deployment builds a network from the ground up - routing, switching, Wi-Fi. Network security protects the network you already have (yours or one we deployed) - segmentation, Zero Trust, DDoS protection and access control. We often deliver both together, but they're separate scopes of work.
Does deploying segmentation require network downtime?
We don't plan production downtime. We roll out segmentation in phases - first mapping traffic and dependencies between systems, then gradually introducing policies in monitoring mode, and finally in enforcement mode. Changes on network devices happen in maintenance windows.
What is Zero Trust and does every company need it?
Zero Trust is a model where no device or user is automatically trusted just because it's inside the corporate network - every access request is verified. It makes sense where the network includes remote work, multiple locations, or external partner access. For a small, single-site network, full Zero Trust can be disproportionate - in that case we start with segmentation and NAC.
How do you protect against DDoS attacks?
We combine edge protection (volumetric filtering, rate limiting) with configuration at the ISP or CDN level for larger attack volumes. The right solution depends on the client's traffic profile and whether the service is publicly accessible (e.g. e-commerce, streaming).
How much does a network security deployment cost?
Scope depends on network size and the mechanisms chosen. An audit plus basic segmentation for a single location typically runs from a few thousand to around twenty thousand euros. A full Zero Trust deployment with anti-DDoS protection across multiple locations is quoted after an initial audit - it depends on the number of segments, devices and existing network hardware.