A Virtual Private Network (VPN) is the best solution to allow remote employees secure access to company resources without interception concerns. A VPN establishes an encrypted tunnel over the internet, ensuring that data transferred between remote employees and the company is secure from eavesdropping.
Proxy server helps with web content filtering and anonymization but does not provide encrypted access.
NGFW (Next-Generation Firewall) enhances security but is not the primary tool for enabling remote access.
Security zone is a network segmentation technique but does not provide remote access capabilities.