Worked on the derailed/cilium repository to address a critical issue in dual-stack node health monitoring. Focused on improving the reliability of node health checks by refining the binding logic when internal IP retrieval fails for either IPv4 or IPv6 stacks. The solution involved updating the health check mechanism to listen on all available interfaces as a fallback, thereby preventing bind errors and reducing conflicts between IPv4 and IPv6 wildcard bindings. Utilized Go for system programming and networking tasks, ensuring that node health checks remain resilient and maintain uptime in complex dual-stack cluster environments. Delivered and validated the fix through targeted bug resolution.