A single unsecured device can expose an entire business network to cyber threats. Whether it’s an outdated laptop, a compromised USB device, or an unauthorized mobile phone, allowing unchecked access increases the risk of malware infections, data breaches, and compliance violations.
Businesses need strict control over who and what connects to their networks. Symantec Network Access Control (SNAC) ensures that only devices meeting security requirements can gain access, while continuously monitoring them for compliance. This helps organizations prevent unauthorized connections, enforce security policies, and maintain regulatory compliance.
Implementing SNAC effectively requires a clear strategy. Here’s how businesses can apply it to secure their IT environments.
How Symantec Network Access Control Works
SNAC operates through pre-admission control and post-admission enforcement to verify, regulate, and monitor devices connecting to a network.
Pre-Admission Control: Validating Access
Before granting access, SNAC verifies each device’s security posture. It checks for:
- Endpoint security compliance: Ensuring firewalls, antivirus, and OS patches are active.
- User authentication: Enforcing Multi-Factor Authentication (MFA) and Identity and Access Management (IAM) policies.
- Device type and status: Preventing unauthorized personal devices from connecting.
If a device fails security checks, it is denied access or redirected to a remediation network for updates.
Post-Admission Enforcement: Continuous Monitoring
Once a device is connected, SNAC continuously monitors its activity. If any device:
- Disables security features
- Downloads unauthorized applications
- Shows signs of malicious behavior
SNAC can automatically restrict, quarantine, or disconnect it from the network.
This proactive approach ensures that security is maintained even after access is granted.
Why Businesses Need SNAC
Enforcing Zero Trust Security
SNAC aligns with Zero Trust Network Access (ZTNA) principles, ensuring no device or user is automatically trusted. It enforces strict authentication, access controls, and continuous monitoring.
Automating Compliance Management
Industries like healthcare, finance, and manufacturing must adhere to compliance standards such as HIPAA, PCI DSS, GDPR, and ISO 27001. SNAC helps automate security enforcement, reducing the risk of regulatory violations.
Reducing IT Workload
Manually verifying device security is impractical for IT teams. SNAC automates policy enforcement by blocking non-compliant endpoints and integrating with Security Information and Event Management (SIEM) tools for real-time monitoring.
Protecting Remote & Hybrid Workforces
With employees accessing corporate networks from various locations, SNAC ensures that only secure, corporate-approved devices can connect through VPNs and cloud applications.
Minimizing Security Risks from IoT & BYOD
Many businesses allow employees to use personal devices (Bring Your Own Device, BYOD) or deploy Internet of Things (IoT) devices. SNAC provides network segmentation and role-based access control (RBAC) to reduce security risks from unmanaged endpoints.
How to Apply SNAC in Your Business
1. Define Security & Access Policies
Establish security rules based on:
- Device health: Enforce OS updates, endpoint protection, and encryption.
- User roles: Implement Role-Based Access Control (RBAC) to limit privileges.
- Network segmentation: Isolate sensitive systems from general access.
Policies should align with industry regulations and internal security frameworks.
2. Deploy Symantec Endpoint Protection Manager (SEPM)
SNAC is managed through Symantec Endpoint Protection Manager (SEPM), which acts as the central control hub. Install SEPM on a dedicated, high-security server and integrate it with SIEM tools for enhanced visibility.
3. Install SNAC Agents on Endpoints
Deploy SNAC agents on:
- Laptops, desktops, and mobile devices
- Corporate IoT systems
- Remote employee endpoints using VPN access
Using Microsoft SCCM or Group Policy (GPO) can simplify large-scale deployments.
4. Configure Enforcement Methods
SNAC enforces security using different mechanisms:
- 802.1X authentication: Ensures only authorized devices access the network.
- DHCP-based enforcement: Blocks non-compliant devices from receiving IP addresses.
- Firewall-based enforcement: Restricts network access for endpoints failing compliance checks.
- VPN enforcement: Prevents unsecured remote devices from accessing corporate resources.
Choose enforcement methods based on network architecture and security needs.
5. Implement Remediation Strategies
Not all non-compliant devices need to be blocked immediately. Instead, businesses can:
- Redirect devices to a remediation network for security updates.
- Send automated alerts prompting users to fix issues.
- Quarantine high-risk devices until they meet security requirements.
This approach ensures security enforcement without disrupting productivity.
6. Continuously Monitor & Optimize
SNAC requires ongoing management to remain effective. Businesses should:
- Review compliance reports to identify security gaps.
- Update access control policies to address emerging threats.
- Conduct regular security audits to ensure SNAC effectiveness.
Integrating SNAC with Intrusion Prevention Systems (IPS) and cloud security platforms further enhances network defense.
Final Thoughts
Cybersecurity risks continue to evolve, and traditional perimeter-based defenses are no longer sufficient. Symantec Network Access Control (SNAC) helps businesses enforce security policies, control access, and prevent unauthorized connections—whether from employees, contractors, or IoT devices.
By applying SNAC strategically, businesses can strengthen security, reduce compliance risks, and minimize IT workload. Proper planning, deployment, and continuous monitoring are essential to maximize its effectiveness. For organizations looking to implement a scalable, automated access control solution, NETSEG offers expert guidance on deploying and managing SNAC for optimal security.
Need Assistance?
Contact NETSEG for tailored solutions to secure your business network and ensure compliance with industry standards.