You can use Calico and WireGuard to encrypt data in transit in a Kubernetes cluster without mTLS or IPsec.
Encryption is supported for pod-to-pod traffic on different hosts and host-to-host traffic.
Learn how in this article.
More: https://medium.com/@dhawalsaini.devops_50274/wireguard-with-calico-in-k8s-8608fb8192b5
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