ssl handshake failed - SSL handshake failed connection error

root@linuxfix:~/ssl_handshake_failed$

ssl handshake failed

SSL handshake failed connection error

Solutions

Prerequisites: Start by updating your system to resolve common issues and ensure the solutions provided below are compatible with your current environment.

check_latest_version && sudo apt update && sudo apt upgrade -y

Check SSL configuration

Test SSL setup:

openssl s_client -connect domain:443

nmap --script ssl-enum-ciphers -p 443 domain

curl -I https://domain

Update SSL configuration

Fix SSL settings:

openssl ciphers -v

sudo nginx -t

sudo systemctl reload nginx

Test with different protocols

Try specific SSL versions:

openssl s_client -tls1_2 -connect domain:443

curl --tlsv1.2 https://domain

curl --ssl-reqd https://domain

What is ssl handshake failed?

SSL/TLS connection negotiation failed due to protocol, cipher, or certificate issues.

Common scenarios: Protocol mismatch, weak ciphers, certificate problems, or network issues.

Common Causes

SSL protocol mismatch
Cipher suite incompatibility
Certificate verification failed
Network interference
Firewall blocking

Debugging Tips

wireshark

tcpdump -i any port 443

sslyze domain.com

Prevention

Keep SSL configs updated
Regular SSL testing
Monitor SSL health

Additional Resources

SSL Labs Test

SSL configuration testing

ssl handshake tls encryption