Worked on optimizing tunnel traffic handling in the cilium/cilium repository by addressing a performance issue related to iptables conntrack behavior. Focused on networking and system administration, the solution involved implementing NOTRACK rules in the iptables raw table using Go, which prevented tunnel traffic from being unnecessarily tracked by conntrack. This change reduced churn and the risk of overflow in the conntrack table, particularly under high-traffic tunnel scenarios. The update was integrated cleanly into existing tunnel paths and validated for its impact on throughput and CPU usage, resulting in improved stability and performance for systems relying on heavy tunnel traffic.