Worked on the derailed/cilium repository to enhance Kubernetes networking security by hardening the permissions of the CNI configuration file. The update ensured that the configuration file is written with 0600 permissions, restricting access to the owner only and aligning with the CIS Benchmark for Kubernetes 1.1.9. This change reduced the risk of configuration exposure and improved compliance with industry security standards. The implementation was tracked through a dedicated commit, providing clear traceability. The work involved applying DevOps practices, leveraging Go for development, and utilizing system administration skills to address security requirements within Kubernetes environments. No bug fixes were recorded.