TLS Settings
Changing the default TLS settings depends on the chosen installation method.
Running Rancher in a highly available Kubernetes cluster
When you install Rancher inside of a Kubernetes cluster, TLS is offloaded at the cluster's ingress controller. The possible TLS settings depend on the used ingress controller:
- nginx-ingress-controller (default for RKE1 and RKE2): Default TLS Version and Ciphers.
- traefik (default for K3s): TLS Options.
Running Rancher in a single Docker container
The default TLS configuration only accepts TLS 1.2 and secure TLS cipher suites. You can change this by setting the following environment variables:
| Parameter | Description | Default | Available options |
|---|---|---|---|
CATTLE_TLS_MIN_VERSION | Minimum TLS version | 1.2 | 1.0, 1.1, 1.2, 1.3 |
CATTLE_TLS_CIPHERS | Allowed TLS cipher suites | TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 | See Golang tls constants |