In a distributed, cloud-native environment, network connectivity is crucial, and the complexity of these networks increases the risk of failure. The Blackhole attack is a method used to enhance application resilience by intentionally blocking network traffic to simulate network outages. It works by dropping IP packets at the transport layer, allowing users to configure specific parameters such as port, IP address, and protocol to target, using tools like Gremlin. This approach helps test and validate the robustness of disaster recovery plans, business continuity plans, and the correct configuration of network components like load balancers and API gateways. By running Blackhole attacks, organizations can identify potential weaknesses, improve system reliability, and ensure high availability, thus providing a better experience for customers. The process involves starting with small-scale tests and gradually increasing the scope to simulate large-scale outages, making it a valuable practice for maintaining network reliability.