---
description: "Review the TLS cipher suites supported by `cloudflared` for secure connections between your origin and Cloudflare's network.\n"
title: Cipher suites
image: https://developers.cloudflare.com/cloudflare-one/networks/connectors/cloudflare-tunnel/configure-tunnels/cipher-suites/og.png?v=27bd4f15a7f8de48
---

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# Cipher suites

Last updated Apr 17, 2026|Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/cloudflare-one/networks/connectors/cloudflare-tunnel/configure-tunnels/cipher-suites/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/)

Cloudflare Tunnel connections use the cipher suites supported by `cloudflared`, which relies on the Go TLS library for its TLS implementation. These cipher suites apply to both the TLS connection between Cloudflare's network and `cloudflared`, and the HTTPS connection between `cloudflared` and your origin. In both cases, `cloudflared` negotiates the most secure cipher suite supported by both sides. All tunnel connections use TLS 1.3 and post-quantum encryption by default.

The following table lists the cipher suites supported by `cloudflared`:

| Protocol support | Cipher suites |
| --- | --- |
| TLS 1.3 only | `TLS_AES_128_GCM_SHA256`<br>`TLS_AES_256_GCM_SHA384`<br>`TLS_CHACHA20_POLY1305_SHA256` |
| TLS 1.2 only | `TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256`<br>`TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384`<br>`TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256`<br>`TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384`<br>`TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256`<br>`TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256` |
| Up to and including TLS 1.2 | `TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA`<br>`TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA`<br>`TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA`<br>`TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA` |

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