---
title: cf.tls_version · Cloudflare Ruleset Engine docs
description: The TLS version of the connection to Cloudflare.
chatbotDeprioritize: false
source_url:
  html: https://developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.tls_version/
  md: https://developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.tls_version/index.md
---

# cf.tls\_version

`cf.tls_version` String

The TLS version of the connection to Cloudflare.

Example value:

```txt
"TLSv1.2"
```

Categories:

* Request
* SSL/TLS
