SSL Protocol Support Checker
Analyze SSL/TLS protocol versions, cipher suites, and security configurations supported by web servers. Identify weak protocols and ensure optimal security settings.
- Enter the server hostname you want to test (e.g., example.com)
- Specify the port number (default: 443 for HTTPS)
- Select which protocol versions to test (TLS 1.3, TLS 1.2, etc.)
- Choose additional security checks to perform
- Click Check SSL Protocol Support
- Review the detailed results including supported protocols, cipher suites, and security recommendations
What is SSL Protocol Support Testing?
SSL Protocol Support testing analyzes which SSL/TLS protocol versions and cipher suites a web server supports. This is crucial for identifying security vulnerabilities, ensuring compliance with modern security standards, and optimizing server configurations for maximum security and compatibility.
Our comprehensive SSL Protocol Support Checker examines server configurations, identifies weak protocols, tests cipher suite strength, and provides actionable security recommendations to help you maintain the highest level of SSL/TLS security.
Why Check SSL Protocol Support?
🔒 1. Security Vulnerability Assessment
Identify and eliminate security risks from outdated protocols:
- → Weak Protocol Detection: Find servers still supporting SSL 2.0, SSL 3.0, or TLS 1.0
- → Cipher Suite Analysis: Identify weak or deprecated encryption algorithms
- → Vulnerability Scanning: Check for known SSL/TLS vulnerabilities like POODLE, BEAST, CRIME
- → Perfect Forward Secrecy: Verify support for PFS cipher suites
📋 2. Compliance and Standards
Ensure your server meets industry security requirements:
- PCI DSS compliance requirements for payment processing
- NIST cybersecurity framework guidelines
- Industry-specific security mandates (HIPAA, SOX, etc.)
- Browser security requirements and warnings
- Corporate security policy compliance
⚡ 3. Performance Optimization
Optimize SSL/TLS performance while maintaining security:
- TLS 1.3 support for faster handshakes and improved performance
- Modern cipher suites with hardware acceleration support
- Elliptic Curve Cryptography (ECC) for better performance
- Session resumption and ticket support
- HTTP/2 compatibility with proper ALPN configuration
🌐 4. Browser Compatibility
Ensure compatibility across all client browsers and devices:
- Modern browser support (Chrome, Firefox, Safari, Edge)
- Mobile device compatibility (iOS, Android)
- Legacy system support when required
- API client compatibility for web services
SSL/TLS Protocol Versions Explained
✅ TLS 1.3 (Recommended)
Latest and most secure protocol:
- • Faster handshakes (1-RTT)
- • Improved security
- • Forward secrecy by default
- • Reduced attack surface
✅ TLS 1.2 (Secure)
Widely supported and secure:
- • Strong cipher suites
- • AEAD encryption modes
- • Broad compatibility
- • Industry standard
⚠️ TLS 1.1/1.0 (Deprecated)
Should be disabled:
- • Vulnerable to attacks
- • Weak cipher suites
- • Browser warnings
- • Compliance issues
❌ SSL 3.0/2.0 (Insecure)
Must be disabled:
- • Critically vulnerable
- • POODLE attacks
- • No longer supported
- • Security risk
Common SSL/TLS Vulnerabilities
🚨 POODLE (SSL 3.0)
Impact: Allows attackers to decrypt secure connections
Solution: Disable SSL 3.0 completely and use TLS 1.2+ only
⚠️ BEAST (TLS 1.0)
Impact: CBC cipher vulnerability in TLS 1.0
Solution: Upgrade to TLS 1.2+ and use AEAD cipher suites
⚠️ CRIME/BREACH
Impact: Compression-based attacks on encrypted data
Solution: Disable TLS compression and be careful with HTTP compression
🔒 Weak Cipher Suites
Impact: Vulnerable to cryptographic attacks
Solution: Use only strong, modern cipher suites with AEAD encryption
💡 Best Practices
- ✓ Always verify results after using SSL tools
- ✓ Keep certificates and keys secure
- ✓ Test configurations in staging first
- ✓ Monitor certificate expiry dates
- ✓ Follow security compliance requirements