> ## Documentation index > Fetch the complete documentation index at: https://arize.com/llms.txt > Ask it with GET https://arize.com/ask?q=. Short keywords rank best. > Use these to discover all available pages before exploring further. # 04.28.2025: TLS support for Phoenix server > Available in Phoenix 8.29+ ## TLS Support For Phoenix Server Phoenix now supports Transport Layer Security (TLS) for both HTTP and gRPC connections, enabling encrypted communication and optional mutual TLS (mTLS) authentication. This enhancement provides a more secure foundation for production deployments. ### **Highlights:** * **Secure HTTP & gRPC Connections:** Phoenix can now serve over HTTPS and secure gRPC. * **Flexible TLS Configuration:** TLS settings are managed via environment variables. * **Optional Client Verification:** Support for mTLS with configurable client certificate validation. * **Improved Testing:** TLS-aware infrastructure added to integration tests. * **Better Visibility:** Server startup logs now display TLS status. ### **Configuration Options** Set the following environment variables to enable and customize TLS: | Variable | Type | Description | | ------------------------------- | ------- | ------------------------------------------------ | | `PHOENIX_TLS_ENABLED` | boolean | Enable or disable TLS (`true`/`false`) | | `PHOENIX_TLS_CERT_FILE` | string | Path to TLS certificate file | | `PHOENIX_TLS_KEY_FILE` | string | Path to private key file | | `PHOENIX_TLS_KEY_FILE_PASSWORD` | string | Password for encrypted private key file | | `PHOENIX_TLS_CA_FILE` | string | Path to CA certificate (for client verification) | | `PHOENIX_TLS_VERIFY_CLIENT` | boolean | Enable client cert verification | **Note:** Encrypted private keys require the `cryptography` Python package for decryption.