To meet cybersecurity isolation requirements, the agency has implemented an isolated internal network for office work and a separate internet VDI (Virtual Desktop Infrastructure) to provide users with internet access. However, due to case processing operational needs, there is a requirement to establish a controlled and secure transmission system between the internal office PCs and the internet VDI without altering the existing network isolation environment. This system will facilitate secure data exchange from the internet to the internal network and effectively block virus-infected files during transmission while providing transfer auditing.