To allow secure access to a sensitive company web server that is load-balanced by the NetScaler, a Citrix Administrator can use the ICA proxy and Application Firewall features. The ICA proxy enables secure remote access by tunneling connections through a secure connection, ensuring that data exchanged between the server and client is encrypted and protected. The Application Firewall protects the web server by inspecting incoming traffic for malicious activity and blocking any threats, providing an additional layer of security for sensitive information.