In Rancher v2.1.7, the default TLS configuration changed to only accept TLS 1.2 and secure TLS cipher suites. TLS 1.3 and TLS 1.3 exclusive cipher suites are not supported.

Configuring TLS settings

The Audit Log is enabled and configured by passing environment variables to the Rancher server container. See the following to enable on your installation.

TLS Environment Variables

ParameterDescriptionDefaultAvailable options
CATTLE_TLS_MIN_VERSIONMinimum TLS version1.21.0, 1.1, 1.2
CATTLE_TLS_CIPHERSAllowed TLS cipher suitesTLS_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

Legacy configuration

If you need to configure TLS the same way as it was before Rancher v2.1.7, please use the following settings:

ParameterLegacy value
CATTLE_TLS_MIN_VERSION1.0
CATTLE_TLS_CIPHERSTLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
TLS_RSA_WITH_AES_128_GCM_SHA256,
TLS_RSA_WITH_AES_256_GCM_SHA384,
TLS_RSA_WITH_AES_128_CBC_SHA,
TLS_RSA_WITH_AES_256_CBC_SHA,
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
TLS_RSA_WITH_3DES_EDE_CBC_SHA