---
title: TLS Support
layout: docs
nav: firecracker
redirect_from:
- /docs/reference/tls/
---
The Fly proxy only supports TLSv1.2 and TLSv1.3 with strong ciphers. Learn more about our [built-in TLS termination](/docs/security/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](https://www.ssllabs.com/ssltest/analyze.html?d=fly.io&s=2a09%3a8280%3a1%3a0%3a0%3a0%3aa%3a791&hideResults=on&latest+external).
TLS Support
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.