TLS Support - Fly.io

The Fly proxy only supports TLSv1.2 and TLSv1.3 with strong ciphers. Learn more about our built-in TLS termination.

Supported Cipher Suites

These suites give us broad, secure coverage. We do not support very old browsers. TLS 1.3:

TLS_AES_128_GCM_SHA256
TLS_AES_256_GCM_SHA384
TLS_CHACHA20_POLY1305_SHA256

TLS 1.2:

TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256

You can always get an updated list of supported ciphers from the SSL Labs test results.