</p><p>There was another motivation for enabling mTLS for all traffic; Auto Trader UK was planning to move the bulk of their infrastructure to the public cloud. <a href=/v1.10/docs/tasks/security/authentication/mtls-migration/>Strong end-to-end mTLS</a> would be important to protect their entire microservice ecosystem.</p><h2 id=solution-istio-and-google-kubernetes-engine-gke>Solution: Istio and Google Kubernetes Engine (GKE)</h2><p>The Auto Trader UK Platform team worked on a proof of concept implementatio