Worked on the apple/container repository to deliver a cross-protocol port validation fix, enabling the use of the same port number for both TCP and UDP protocols. Addressed a common networking configuration challenge by refining the validation logic to be protocol-scoped, ensuring that port overlaps are only checked within the same protocol. This approach aligns the system with real-world networking practices and reduces configuration errors. The solution was implemented using Swift, with a focus on backend development and comprehensive testing. Local verification and updated test coverage ensured backward compatibility, improving deployment flexibility and strengthening the reliability of container networking configurations.