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Secure cloud connectivity: connect your office to Azure without the risks of the public internet

We build dedicated private connections (ExpressRoute) and encrypted tunnels (VPN) to guarantee your cloud environment is isolated, secure, and invisible to attackers.

solution partner

The challenge: is your network leaking data?

In the cloud era, the "perimeter" has dissolved. Organizations often face critical networking risks that traditional firewalls cannot solve:

Public internet exposure

Are your database ports or management interfaces accessible from the open internet? This is the #1 vector for ransomware attacks

Latency bottlenecks

Are your critical ERP or financial applications lagging because they rely on unstable public internet connections?

The "flat network" risk

If an attacker breaches one server, can they move laterally to your entire estate? A lack of internal segmentation makes this easy.

Compliance failures

Regulations often require that financial or personal data travel only over private, dedicated links, not the public web.

The solution: hub & spoke architecture

We move you away from ad-hoc networking to an enterprise-grade Hub & Spoke topology. This centralizes security control while allowing scalable growth without chaos.

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01

The hub (central DMZ)

This acts as the single point of entry and exit for your cloud estate. It hosts shared critical services—Azure Firewall, VPN Gateways, ExpressRoute circuits, and Azure Bastion—preventing the need to duplicate expensive appliances across every environment.
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The spokes (workload isolation)

Your applications (Production, UAT, Dev) reside in separate, isolated Virtual Networks (VNets). These spokes peer only with the Hub, ensuring that a compromise in a development environment cannot laterally spread to your production database.
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Centralized governance

By routing traffic through the Hub, we enforce a "single pane of glass" for inspection. All north-south (internet) and east-west (inter-spoke) traffic is subjected to the same rigorous firewall policies and intrusion detection rules.
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Cost efficiency

Instead of deploying a VPN Gateway and Firewall for every single application (which multiplies costs), the Hub & Spoke model allows multiple workloads to share these high-value resources effectively.

How it works: our engineering methodology

We treat networking as code. We don't manually click through the portal; we define your network in software for repeatability and safety.

01

Topology design & IP planning

We analyze your on-premise and cloud address spaces to prevent IP overlap. We design the subnet structure (GatewaySubnet, FirewallSubnet, ApplicationSubnet) to support future scaling.

02

Connectivity implementation

We configure the physical and logical links.
  • Site-to-site VPN: For cost-effective, encrypted tunnels suitable for branch offices.
  • ExpressRoute: For mission-critical links requiring guaranteed bandwidth and SLAs (up to 100 Gbps) completely bypassing the public internet.

03

Zero trust enforcement

We deploy Azure Firewall (Premium) to inspect traffic for malware (IDPS) and enforce TLS inspection. We apply Network Security Groups (NSGs) and Application Security Groups (ASGs) to lock down individual virtual machines.

Technology stack: building blocks of a secure network

We utilize the native Azure networking stack to ensure compatibility and performance.

Connectivity

Azure VPN Gateway (Policy-based / Route-based) and Azure ExpressRoute (Local / Standard / Premium circuits).

Core networking

Virtual Network (VNet) peering and Virtual WAN for global branch connectivity.

Security

Azure Firewall Premium for layer 7 inspection and DDoS Protection Standard for volumetric attack mitigation.

Private access

Azure Private Link to access PaaS services (SQL, Storage) over your private network, eliminating public endpoints.
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Business value: performance meets protection

A properly architected network is an enabler for business agility, not just a security cost.

  • Guaranteed privacy: With ExpressRoute, your traffic never touches the public internet, satisfying the strictest compliance audits.
  • Predictable performance: Dedicated bandwidth ensures your applications perform consistently, regardless of global internet congestion.
  • Reduced attack surface: Micro-segmentation ensures that a breach in a development environment cannot spread to production data.
  • Centralized visibility: All traffic flows through the Hub, giving you a single pane of glass to monitor threats and usage via Azure Network Watcher.

Deliverables: your network blueprint

Deliverable

Technical specifications

Low level design (LLD)

Comprehensive Visio network diagrams detailing subnets, peering relationships, and routing tables (UDRs).

Infrastructure as code

The entire topology defined in Terraform or Bicep scripts, allowing for rapid disaster recovery recreation.

Connectivity matrix

A detailed document mapping allowed traffic flows (ports/protocols) between on-premise, hub, and spokes.

Security audit report

Verification that no critical resources have public IP addresses and that management ports (RDP/SSH) are blocked.

Professnet is officially certified for: ISO 27001

ISO certifications reflect our focus on delivering reliable and secure technology services.
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Tier-1 Partner

Direct collaboration with Microsoft engineers

16 Years

Experience in system design

ISO 27001

Certified information security

< 15 min

Critical incident response time (SLA)

Engagement timeline: securing the pipe

Week 1

Audit & Design

We review your existing IP ranges and connectivity requirements to design a non-overlapping Hub & Spoke topology.

Week 2

Build & Connect

We deploy the VNet infrastructure and establish the VPN or ExpressRoute connection (coordinating with your local ISP if needed).

Week 3

Segmentation & Handover

We implement NSGs and Firewall rules, perform connectivity tests, and hand over the operational runbooks.

Why partner with us?

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Networking specialists

We understand BGP routing, subnet masking, and CIDR notation. We bridge the gap between traditional network engineering and cloud concepts.

ExpressRoute expertise

We have specific experience navigating the complexities of provisioning ExpressRoute circuits in Poland and Europe, coordinating with local providers (Orange, Equinix, etc.).

Security-first approach

We don't just connect you; we protect you. Every network we build is designed on "Zero Trust" principles by default.

What our customers say about us

Their professionalism, reliability, and commitment to each project ensure that every collaboration runs smoothly and efficiently. I wholeheartedly recommend Professnet as a solid and competent business partner.

Mariusz Duczek

Managing Director @ SCHURTER

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Thanks to their skills in system integration and technological consulting, we have significantly improved our operational processes. Projects are executed not only on time but with the utmost care.

Jarosław Sojewski

Managing Director @ FOMAR Friction

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The professionalism of the team, their quick response to our needs, and in-depth analysis have enabled us to optimize our cloud environment and enhance its security. We confidently recommend Professnet as a solid technology partner.

Maciej Kromkowski

Board Member @ Power21

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Case studies

From Local Server Room to Global Cloud

How abcgo.pl Reduced Costs by 40% and Secured Client Financial Data.

ERP System:

enova365

Technologies:

Microsoft Azure, Azure Virtual Desktop (AVD), SQL Database

Key Achievement:

40% OPEX Reduction
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Building a resilient security architecture

How KZBS secured the ecosystem of 500+ cooperative banks against modern threats.

Sector:

Banking / Public Trust

Scale:

500+ Associated Banks

Key Compliance:

NIS2, DORA, GDPR, ISO 27001

FAQ

If you are a small branch with standard data needs, a Site-to-Site VPN (encrypted over public internet) is cost-effective. If you require guaranteed throughput, low latency for real-time apps, or data sovereignty compliance, ExpressRoute (private dedicated fiber) is the required choice.

In a traditional "flat" network, a hacker on one server can access everything. Micro-segmentation acts like watertight doors on a submarine; if one segment is breached, the rest of the network remains secure.

Pricing depends on port speed and the SKU (Local vs. Standard). For data staying within the same geopolitical region (e.g., Warsaw data center to Azure Poland Central), the ExpressRoute Local SKU offers significant cost savings by including unlimited data transfer. We help calculate the exact TCO.

Yes. We use Azure Private Link. This projects your PaaS service (like Azure SQL) into your private VNet with a private IP address, allowing us to completely disable public internet access to that resource.

Technology Partners

We are always happy to talk

Reach out to us about a project, consultation, or to explore other collaboration opportunities.

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