Gaining Visibility Behind the VPN: Empowering Remote Workforces Without Losing Control Over DNS Security
A global consulting firm boasts a highly mobile workforce spread across multiple continents. Employees regularly connect to the corporate network via virtual private network (VPN) clients, ensuring confidentiality for sensitive projects. However, this arrangement introduces a challenge: once employees are behind the VPN, traditional DNS monitoring solutions often fail to identify the specific device or user generating suspicious DNS queries.
The firm’s security and IT teams already use a robust firewall, a SIEM platform, and endpoint antivirus solutions. Yet correlating DNS queries with individual remote devices remains a time-consuming puzzle, particularly when IP addresses are dynamically assigned by the VPN. They need a way to maintain unified oversight, even as employees hop between on-site and remote environments.
DNSSight provides a game-changing layer of DNS visibility that extends behind the VPN, allowing the security team to pinpoint potential threats to any remote or roaming endpoint, all without overhauling the existing infrastructure.
750+
Challanges
Limited Remote Visibility
Dynamic IP Assignment: Remote endpoints receive ephemeral IPs from the VPN, complicating attempts to trace malicious DNS queries back to specific machines.
Fragmented Logs: Traditional DNS logs show only inbound or outbound connections at the gateway, failing to link suspicious queries with the device or user behind them.
Complex Infrastructure
Diverse Endpoints: Laptops, mobile devices, and specialised contractor machines span different OS versions, making uniform agent deployment or software installs problematic.
Existing Tools: An investment in firewalls, SIEM, and endpoint security needs to be preserved—another “rip and replace” solution isn’t feasible or cost-effective.
Operational Disruption Risks
Zero Tolerance for Downtime: Consultants rely on seamless connectivity to client sites and internal resources; any network disruptions harm productivity and customer trust.
Security vs. Accessibility: Overly strict measures could block legitimate traffic or hamper the user experience, reducing compliance and fuelling workarounds.
Solution
DNSSight for Comprehensive VPN Visibility
Full DNS Correlation
VPN-Aware Insight: DNSSight integrates with VPN-compatible firewalls, capturing DNS requests passing through the tunnel and automatically linking them to user credentials or machine details in real time.
Agentless Monitoring: No need to deploy additional software on every device—DNSSight leverages existing IAM, and DNS logs to match the query to the correct endpoint.
End-to-End Threat Detection
Malicious Domain Alerts: Short-lived or suspicious domains commonly used by attackers are flagged instantly, whether the user is working from the office, home, or a remote client site.
NX Domain Tracking: Even if a malicious domain is offline, DNSSight still captures and highlights the attempt, ensuring no hidden threats escape notice.
Operational Efficiency
Seamless SIEM Integration: Enriched DNS data flows into the organisation’s SIEM, enabling swift correlation with other alerts (firewall, endpoint, or user activity).
Minimal Network Impact: Deployable on a virtual machine without reconfiguring the entire VPN or network topology, preserving uptime for mission-critical tasks.
Results
Enhanced Remote Security
Pinpoint Attribution: Security analysts can instantly see which remote device generated a suspicious DNS query, speeding up incident triage and containment.
Proactive Defence: With continuous DNS visibility behind the VPN, emerging threats—like newly spun-up phishing domains—are caught before they propagate across the network.
Stronger ROI on Existing Tools
SIEM & Firewall Synergy: DNSSight boosts the effectiveness of the firm’s firewall and SIEM investments, delivering detailed and actionable DNS insights to existing dashboards.
No Major Upgrades: Avoid expensive hardware or forced migrations, letting IT teams focus on strategic improvements instead of operational firefighting.
Streamlined Incident Response
Faster Investigations: Automated correlation ensures that once a malicious domain is flagged, the investigating team sees immediately who attempted the connection and when.
Reduced Alert Fatigue: Intelligent filtering cuts down extraneous logs, ensuring each alert that hits the SOC is rich with context and ripe for immediate action.
Optimised User Experience
No Intrusive Agents: Users remain productive without extra software or repeated updates.
Consistent Connectivity: Consultants keep the frictionless VPN access they need to serve clients around the globe, with no loss of security oversight.
Conclusion
In an era when remote work and global collaboration have become core pillars of enterprise operations, retaining robust DNS visibility behind the VPN is vital. DNSSight ensures that every query—whether from the corporate office or a home-based consultant—gets captured, correlated, and analysed in real time.
For security teams grappling with dynamic IP addresses, limited insight into remote user activity, and a patchwork of endpoint devices, DNSSight offers peace of mind. By extending DNS visibility behind the VPN, the firm gains unified oversight, swift incident response, and a better return on their existing security investments, all while delivering the uninterrupted connectivity that staff and clients demand.
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