Peer Failed to Perform TLS Handshake: Causes and Fixes

• 21 June 2026
• by: Harvey Greene
• in: SSL Certificates
• Tags: ca-certificates, curl, gnutls, OpenSSL, SSL errors, TLS handshake
• note: no comments

Learn why the ‘peer failed to perform TLS handshake’ error happens in curl, git, and gnutls, and how to fix TLS version, CA certificate, clock, and cipher issues.

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