Depending on your particular business situation, this may present some limitations in using stronger encryption standards.Ĭonsider using TLS 1.0 or 1.1 for sites with a broad user base, particularly non-transactional sites. Not all browser versions support TLS 1.2 and above. TLS 1.3, which offers additional security and performance improvements, was approved by the Internet Engineering Task Force (IETF) in May 2018. Cloudflare recommends migrating to TLS 1.2 to comply with the PCI requirement. TLS 1.2 includes fixes for known vulnerabilities found in previous versions.Īs of June 2018, TLS 1.2 is the version required by the Payment Card Industry (PCI) Security Standards Council. Understand TLS versionsĪ higher TLS version implies a stronger cryptographic standard.

* error:1400442E:SSL routines:CONNECT_CR_SRVR_HELLO:tlsv1 alertįor guidance on which TLS version to use, review the information outlined below. If the TLS version you are testing is blocked by Cloudflare, the TLS handshake is not completed and returns an error:

Test tls 1.2 connections in curl