Network Security

Protect data flow across hybrid, multi cloud and distributed infrastructure.

Securing the flow of data across modern, distributed environments means moving beyond perimeter firewalls to distributed enforcement. Network security that works across users, cloud workloads, applications and OT infrastructure provides visibility and control across all traffic flows: within your network, between offices, to cloud platforms and across hybrid infrastructure.

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Perimeter based security no longer works

Your organisation no longer fits traditional network architecture. Office based users access resources across public cloud, private data centres and hybrid infrastructure. Applications run on premises and in multiple cloud regions. Partners and contractors need access from their own networks. OT infrastructure supports critical operations with different security models than IT systems.

Traditional firewalls enforce security at the edge of a corporate network. When the network boundary is gone (or when data increasingly bypasses it), perimeter defence becomes incomplete. You need security that works where data actually flows: between cloud workloads, between on premises and cloud systems, between users and applications, and across the devices users work with.

Firewall appliances, cloud native security services, endpoint agents, mobile security (they often operate independently without shared policy or telemetry). Configuring and monitoring multiple disconnected tools requires separate teams, separate skill sets and separate incident response processes. Security operations becomes reactive and fragmented.

Zero Trust principle: never trust, always verify. Microsegmentation enforces this by restricting communication to only what’s explicitly allowed. But when segmentation requires manual firewall rules across distributed firewalls and cloud platforms, it gets complex rapidly and falls out of sync with actual applications. Applications move, new services spawn, segmentation policies become outdated and unmanaged.

Key features

Distributed firewall enforcement

Security policy applied consistently across on premises firewalls, cloud platforms and user devices. Rather than single chokepoints, policies enforce at multiple points: traffic between cloud workloads, traffic to external services, traffic from remote users. Policies stay synchronised and apply regardless of where workloads run or users connect from.

Segmentation and microsegmentation

Define communication policies based on applications and workloads, not network topology. Rather than broad network segments separated by firewalls, microsegmentation restricts traffic to only what applications actually require. A compromised workload cannot communicate laterally to other systems because policy forbids it.

Cloud delivered and Cloud native enforcement

Cloud infrastructure fundamentally changes network security. Cloud native security controls (security groups, network policies, service mesh capabilities) enforce at the application layer rather than requiring dedicated appliances. Cloud delivered firewalls (SASE platforms) apply security at the point of access rather than funnelling traffic through distant hubs.

Hybrid and multi cloud consistency

Policy and enforcement that work across on premises networks, AWS, Azure, GCP and hybrid combinations. Rather than managing separate security policies for each environment, you define policy once and enforce across all infrastructure. This is essential as workloads move between environments and as organisations run genuinely distributed infrastructure.

How it works

Step 1

Align network security to your risk posture

Define what you need to protect: critical assets, sensitive data, compliance regulated systems. Identify where that data flows and what paths matter most. Threats to cloud workloads differ from threats to OT systems; threats within your own infrastructure differ from threats from external actors. Risk alignment shapes where you invest in enforcement and detection.

Step 2

Evaluate vendors against your architecture

Compare firewall appliances, cloud native security services and SASE platforms against your actual environment. Do you need perimeter based enforcement alongside cloud security? Can you retire appliances entirely by moving to cloud delivered services? Evaluate deployment models (on premises, cloud, hybrid) and integration (do all your tools share telemetry and policy?).

Step 3

Design across firewall, SASE and segmentation

Most organisations use combinations: traditional firewalls for on premises networks, cloud native enforcement for cloud workloads, SASE for remote access, and microsegmentation for both. Design which enforcement applies where based on actual traffic patterns and risk. This is rarely a single product solution.

Step 4

Deploy across your hybrid environment

Begin with enforcement at your highest risk boundaries: cloud to cloud traffic, on premises to cloud connections, remote user access. Expand gradually to segmentation of internal traffic and workload level enforcement. Phased deployment reduces implementation complexity and allows teams to learn each enforcement layer before expanding.

Step 5

Integrate telemetry with detection and response

Network traffic flows are high value telemetry for threat detection: anomalous outbound traffic suggests data exfiltration; traffic to known malicious IP space suggests compromise; unusual inter workload communication suggests lateral movement. Integrate network visibility with your broader security detection infrastructure.

Partners

Network security requires integration across traditional firewalling, cloud native controls and distributed enforcement points. SCC works with leading network security partners to design and deploy controls that protect data flow across hybrid and multi cloud infrastructure.

Ready to secure your network architecture?

Network security that protects data flow across hybrid and multi cloud infrastructure means enforcement at multiple points with visibility across all of them. Waiting for traffic to reach a centralised firewall creates delay and missed visibility for cloud to cloud traffic and encrypted flows. Distributed, policy based enforcement that follows data wherever it flows provides the protection your architecture actually needs.

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FAQs

How does network security work in a hybrid and multi cloud environment?

Hybrid infrastructure spans on premises networks, multiple cloud platforms and sometimes edge locations. Network security must enforce at each boundary and within each environment. This typically means: traditional firewalls protecting on premises networks, cloud native security controls protecting cloud workloads, SASE or cloud delivered firewalls protecting remote user access, and network policies or microsegmentation controlling communication within each platform. The goal is consistent policy enforcement across all environments.

What is SASE (Secure Access Service Edge)?

SASE combines network security (firewall, DLP) and access security (authentication, VPN) into a cloud delivered service. Rather than traffic flowing through your infrastructure to be inspected, traffic goes directly to the SASE cloud gateway where it’s inspected and enforced before reaching your network. This reduces latency, simplifies infrastructure and provides security everywhere users work, not solely at corporate offices.

How does microsegmentation improve security beyond traditional firewalls?

Traditional firewalls create broad network segments (trusted/untrusted, corporate/guest). Microsegmentation restricts communication to the minimum required by applications: only the workloads that genuinely need to communicate can do so. If a workload is compromised, it cannot communicate to other workloads because network policy forbids it. This stops lateral movement even when the initial compromise succeeds.

Can we maintain security across cloud platforms with different native security tools?

Cloud native security tools (AWS Security Groups, Azure Network Security Groups) work well for their individual platforms but don’t provide consistent policy across platforms. When you have multi cloud infrastructure, you typically use cloud native tools for workload specific enforcement and add additional tools for cross cloud, multi cloud policy consistency and centralised visibility.

How do we handle network security for operational technology (OT) and industrial control systems?

OT networks have different threat models and constraints than IT networks. OT devices often cannot support modern encryption, authentication or monitoring agents. Network based security that provides visibility without requiring endpoint changes (packet inspection, asset discovery) and enforcement at the network edge (OT specific firewalls) is essential. OT networks benefit most from strict microsegmentation because they’re designed for specific applications with predictable communication patterns.