Benefits:

Enhanced security for organizational networks by preventing split tunneling. This practice allows remote devices to access both the organization's internal network (through a VPN) and the public internet simultaneously. This creates a security risk as unencrypted traffic from the public internet could potentially access the internal network.

Accountability:

Senior Management: Approves and enforces policies: Establish policies prohibiting split tunneling and ensure awareness across the organization. Provides resources: Allocate budget and personnel to implement and maintain controls for disabling split tunneling. Reviews and audits: Conduct periodic reviews of control effectiveness and remediate any identified shortcomings.

IT Security Team: Implements technical controls: Configure VPNs and network devices to detect and prevent split tunneling. Develops and maintains procedures: Create guidelines and procedures for employees on proper VPN usage and troubleshooting. Monitors and logs activity: Monitor for potential split tunneling attempts and investigate suspicious activity.

System Owners: Configure systems: Ensure system configurations comply with the organization's split tunneling policy. Maintain system security: Implement additional security controls on systems accessed through VPNs. Report vulnerabilities: Report any vulnerabilities identified in systems that could be exploited through split tunneling.

Individual Users: Comply with policies: Understand and adhere to the organization's policy on split tunneling. Avoid unauthorized configurations: Refrain from modifying VPN configurations to enable split tunneling. Report suspicious activity: Report any attempts to circumvent or exploit security controls related to split tunneling.

Implementation:

Detection: Organizations can implement solutions that: Identify split tunneling configurations on remote devices. Monitor network traffic for signs of split tunneling activity.

Prevention: Disable split tunneling functionality on remote devices through configuration settings. Enforce full VPN tunnel usage for all traffic when connected to the organization's network.