What should be implemented to restrict outbound access from a Remote Desktop server in a multi-cloud environment?

Implementing an Azure Firewall to restrict outbound access from a Remote Desktop server in a multi-cloud environment is an effective choice. Azure Firewall is a cloud-native, stateful network security service that provides comprehensive protection for resources on Azure and in hybrid scenarios. Its capabilities include application and network-level filtering, which allows you to create rules defining which traffic is allowed to leave the network.

By using Azure Firewall, you can configure detailed rules that specify which outbound traffic is permitted based on various parameters such as IP address, protocol, port, and more. This granular control is essential for managing access in a multi-cloud setup where resources may interact across different cloud environments. In addition, Azure Firewall integrates with service endpoints which can enhance security management across cloud resources.

Options such as a VPN Gateway, security groups, and private endpoints serve specific purposes but do not provide the same level of outbound access control needed in this situation. A VPN Gateway is primarily utilized for establishing secure connections between networks but does not directly control outbound traffic. Security Groups offer some traffic filtering but are generally limited to a single cloud environment and may not possess the extensive capabilities required for outbound traffic management in a multi-cloud architecture. Private Endpoints are used to securely connect to Azure services over a private link, focusing more