Azure Redis Cache enables encryption using TLS by default, however this can be disabled. It is recommended to leave it configured as well as configure it to use TLS 1.2 as the industry standard. For more information, see the Azure documentation.
References:
https://learn.microsoft.com/en-us/security/benchmark/azure/baselines/azure-cache-for-redis-security-baseline
In Azure Console -
In Terraform -
References:
https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/
https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/redis_cache#enable_non_ssl_port