Server-Side Configuration Fixes

Server misconfiguration causes most handshake failures. Ensure your server supports modern TLS versions and cipher suites. Apache configuration example:

SSLEngine on
SSLProtocol -all +TLSv1.2 +TLSv1.3
SSLCipherSuite ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256
SSLHonorCipherOrder off
SSLSessionTickets off

Certificate chain completeness critically affects handshakes. Install intermediate certificates correctly:

# Verify certificate chain
openssl verify -CAfile ca-bundle.crt server.crt

# Combine certificates in correct order
cat server.crt intermediate.crt > fullchain.pem