Every week, businesses across the Philadelphia region lose sensitive data to attacks that could have been stopped with one properly configured control. As remote and hybrid work environments become permanent fixtures of business operations, unprotected internet connections are the clearest vulnerability most organizations carry. A Virtual Private Network, or VPN, is one of the most cost-effective and immediately deployable tools available to close that exposure. Understanding exactly how aVPN works, what threats it mitigates, and how it fits into a broader managed cybersecurity services strategy is the difference between a business that is prepared and one that is one unencrypted session away from a breach.
This guide explains the mechanics of VPN protection, the specific attacks it defends against, what it cannot do alone, and how Ferrara IT helps organizations deploy and manage VPN infrastructure correctly.
A Virtual Private Network establishes an encrypted tunnel between a user's device and a company's network or cloud environment. All data traveling through that tunnel is encoded using AES-256 encryption, the same standard used by government agencies and financial institutions. Even if a cyber criminal intercepts the traffic, the data is unreadable without the corresponding decryption key.
A properly deployed business three core functions simultaneously:
• Data Encryption in Transit: Emails, login credentials,financial records, and file transfers are all encrypted before they leave theuser's device. This prevents interception at any point between the user and the destination server.
• IP Address Masking: The user's real IP address is replaced with the VPN server's IP, making it significantly harder for threat actors to identify,target, or track individual remote employees.
• Secure Access to Internal Resources: Employees can connect to on-premises servers, internal applications, andsensitive databases as if they were physically inside the office, without exposing those resources to the public internet.
One critical distinction: a consumer VPN and a business-grade VPN are not the same product. A business VPN provides centralized administration, role-based access controls, device compliance enforcement, detailed audit logging, and scalability for dozens or hundreds of simultaneous users. Consumer products provide none of those capabilities and introduce their own privacy risks.
The threat landscape facing remote workers is not hypothetical. Stolen VPN credentials were identified as theleading cause of ransomware infections in a January 2025 cyber insurancereport, and over half of all organizations have experienced a VPN- within the past year. The following are the specific attack typesthat a correctly configured VPN mitigates.
In a man-in-the-middle (MITM)attack, a threat actor positions themselves between a user and their intended destination, intercepting and potentially modifying the data exchanged. Theseattacks are especially common on public Wi-Fi networks at airports, hotels, and coffee shops. VPN encryption makes MITM interception useless because theattacker cannot read the captured data without the decryption key.
Cyber criminals frequently deploy rogue Wi-Fi access points that mimic legitimate networks. An employee connecting to a hotel or conference Wi-Fi may unknowingly join an attacker-controlled network designed to harvest credentials and session tokens.A VPN ensures that even on a spoofed network, all transmitted data remains encrypted and the user's real IP address is hidden.
Without encryption, an active browser session can be compromised through packet sniffing, allowing an attacker to steal session cookies and impersonate the authenticated user. When a VPN is active, all session data is encrypted, eliminating the ability to extract usable credentials from intercepted packets.
Home networks present a different but equally real risk. Shared networks with smart televisions, personal devices, and poorly secured routers create multiple potential interception points. Employees who access company systems over an unprotected home connection expose sensitive business data to any device or software monitoring that network. A VPN encrypts the connection before it touches the home router,neutralizing this exposure.
A common misconception among businesses that have moved to Microsoft 365, Google Workspace, or Salesforce is that cloud applications make VPNs redundant. This assumption is incorrect and leaves a significant security gap.
Cloud applications encrypt the data stored inside the application. They do not secure the network connection the employee uses to reach that application. The connection between a remote worker's device and the cloud application travels over the public internet, and that connection remains exposed without a VPN.
Additionally, cloud securitymodels assume:
• The device connecting is secured
• The network the device is using is trusted
• The identity of the user has been properly verified
In a typical remote work scenario,none of these assumptions hold reliably. Home networks are shared and often misconfigured. Personal devices may run outdated software. Employees reuse passwords across personal and professional accounts. A VPN addresses the network layer of this problem while working in concert with endpoint protection and multi-factor authentication to close the remaining gaps.
Businesses that handle sensitiveclient data, operate under HIPAA, NIST, CMMC, or PCI DSS requirements, or workwith regulated industries cannot rely on cloud encryption alone to meet theircompliance obligations. Our ManagedIT Services team routinely identifies organizations operating under the false assumption that cloud adoption liminated their network security requirements.
For organizations subject to regulatory oversight, VPN deployment is not optional. It is a documented control requirement under several major frameworks:
HIPAA: Requires encryption of electronic protected health information (ePHI) in transit. A properly deployed VPN satisfies this requirement for remote access scenarios.
NIST SP 800-53: Control SC-8 mandates transmission confidentiality and integrity. VPN encryption with AES-256 directly addresses this control.
CMMC Level 2: Requires protection of Controlled Unclassified Information (CUI) in transit. VPN is a recognized implementation method for AC.2.006 access control from external networks.
PCI DSS: Requires all cardholder data transmitted over open public networks to be encrypted. VPNs are explicitly cited as an acceptable control in PCI DSS guidance.
Working with a managed IT partner that understands both the technical and compliance dimensions of VPN deploy mentensures that your implementation satisfies auditor expectations, not just surface-level encryption. Ferrara IT manages IT compliance for clients acrossHIPAA, NIST, CMMC, PCI DSS, and SOC 2 frameworks.
A VPN is a critical layer in a security architecture, but it is not a complete security strategy on its own.Understanding what a VPN cannot do is as important as knowing what it protects against.
A VPN does not:
• Prevent phishing attacks that target user credentials before the VPN is connected
• Block malware that has already been installed on an endpoint device
• Protect against insider threats or compromised administrator accounts
• Replace multi-factor authentication as a user verification control
• Provide the continuous monitoring required to detect anomalous behavior on connected sessions
This is why security practitioners consistently recommend deploying a VPN as part of a multilayered approach that includes endpoint detection and response (EDR), SIEM monitoring, multi-factor authentication, and a zero-trust access framework for organizations with complex environments.
The shift toward Zero Trust Network Access (ZTNA) is an important development in this space. ZTNA operates on a never-trust-always-verify model, granting access to specific applications rather than broad network segments, and continuously validating user identityand device health. For businesses with growing remote work forces, aZTNA-informed deployment approach, guided by experienced practitioners,represents the next evolution beyond a standalone VPN implementation. Ferrara IT's managed cybersecurity services include security architecture reviews that evaluate whether a traditional VPN, a ZTNA solution, or a hybrid approach is appropriate for each client's specific environment.
The majority of VPN-related security incidents do not result from weaknesses in encryption algorithms. Theyresult from poor configuration, outdated firmware, unpatched vulnerabilities,missing MFA enforcement, and overly permissive access policies.
Common miscofigurations that create serious risk include:
• No MFA on VPNauthentication: A stolen username and password is all an attacker needs to gain full network access. Without multi-factor authentication, credential theft translates directly to unauthorized access.
• Un patched VPN appliances: VPN gateways are high-valuetargets. Critical vulnerabilities in major VPN platforms have been activelyexploited by ransomware groups to gain initial access to corporate networks.
• Overly broad access permissions: A VPN that grants all users access to all network resources violates least-privilege principles. of any one user account then exposes the entire network.
• Split tunneling without end point controls: Allowing employees toroute personal traffic outside the VPN while connected to company resources creates a potential bridge for attackers to exploit.
• No logging or monitoring: Without audit logs and anomaly detection, compromised VPN sessions can persist for weeks or month sundetected, as seen in several high-profile 2024 and 2025 ransomware incidents.
Ferrara IT's 24/7 incident response and proactive monitoring capabilities include VPN session logging, anomaly detection, and regular access policy reviews to ensure VPN configurations remain hardened over time.
The appropriate VPN architecture depends on your organization's size, compliance requirements, cloud adoption level, and remote workforce structure. The most common deployment types for SMBand mid-market organizations are:
• Remote Access VPN: The standard model for remote and hybrid workers.Individual employees connect to the company network through an encrypted tunnel from any location. Best suited for organizations with distributed workforces needing access to internal resources.
• Site-to-Site VPN: Connects entire office networks to each other over anencrypted tunnel. Used by organizations with multiple physical locations that need seamless connectivity between sites.
• Cloud-Based VPN with Zero Trust Integration: Modern deployments that combine VPN connectivity with identity-based access controls,device health verification, and continuous authentication. Appropriate for cloud-first environments with high security requirements.
Key configuration requirements regardless of deployment model:
• AES-256 encryption with strong authentication protocols
• Multi-factor authenticationen forced for all VPN users without exception
• Role-based access controllimiting each user to only the resources their role requires
• Device compliance policies that prevent unsecured devices from connecting
• Centralized logging with real-time alerting for anomalous connection behavior
• Regular firmware and software patching on VPN appliances and clients
A business VPN protects data in transit by encrypting all information traveling between an employee's device and company systems. It prevents interception on public and home networks, hides the user's IP address from potential attackers, and ensures that only authenticated, authorized users can access internal resources. It does not protect data already on an endpoint device or prevent phishing attacks that occur before the VPN connection is established.
Yes. Cloud applications secure the data inside the application, not the network connection your employees use to reach it. A VPN encrypts the connection itself, preventing interception between the employee's device and the cloud service. For organizations subject to HIPAA, CMMC, or PCI DSS, a VPN may also be a direct control requirement that cloud adoption alone does not satisfy.
No. Consumer and free VPN services lack centralized management, audit logging, device compliance enforcement, and enterprise-grade encryption configurations. Many free VPN providers monetize user data. For business use, a managed business-grade VPN with proper authentication and access controls is the only appropriate option.
A traditional VPN grants authenticated users access to a network segment. Zero Trust Network Access (ZTNA) grants access to specific applications only, based on continuous identity verification, device health assessment, and contextual factors. ZTNA is generally considered a more granular and secure model for complex environments, but a properly configured VPN with MFA and role-based access controls remains effective and appropriate for many SMB and mid-market organizations.
VPN configurations, access logs, and user permissions should be reviewed at minimum every 30 to 60 days. Firmware and software should be patched immediately when security updates are released. Access policies should be updated any time an employee changes roles or leaves the organization. Organizations under HIPAA, CMMC, or SOC 2 frameworks have additional documentation requirements for access control reviews.
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