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Verify your SSL, TLS & Ciphers implementation.

SSL verification is important to ensure your certificate parameters are displayed as expected. There are multiple ways to check SSL certificate, however testing through online tool provides you much useful information listed below. This also helps you in finding any issues in advance instead of user complaining about them.

Having misconfigured SSL/TLS can lead your website to vulnerable so check out following online tools to find out if something wrong.

1. Symantec

Check your CSR – it’s essential to check your CSR before sending for signing request. This gives you confirmation your CSR contains expected parameters like CN, DN, O, OU, Algorithm, etc.

Check certificate installation – after installation of signed certificate, it’s always good to verify your certificate is valid with required information. This online check CN, SAN, Organization, OU, City, Serial number, Algorithm type, Key size and certificate chain details.

2. Wormly

Web Server Tester by Wormly provides you very good overview about your secure URL. This contains certificate overview (CN, Expiry details, Trust chain), Encryption Ciphers details, Public key size, Secure Renegotiation, Protocols like SSLv3/v2, TLSv1/1.2.

3. DigiCert

DigiCert SSL Installation Diagnostics Tool is another fantastic tool to provide you DNS resolves IP address, Certificate details including Issuer, Serial number, key length, signature algorithm, SSL cipher supported by the server and expiry details.

It’s useful if you are looking to verify what all ciphers your server supports.

4. SSL Shopper

SSL Checker by SSL Shopper is very handy tool to check quickly Server type, expiry details, SAN, and trusted chains. You can quickly find if your chain cert is broken or not installed properly.  Good for troubleshooting purpose.

5. GlobalSign

SSL Configuration Checker by GlobalSign provides you very detailed information about your web server & SSL. It gives you score based on certificate details, protocol support, key exchange & cipher strengthen. Qualys SSL labs power this tool. It becomes very essential tool if you are setting up a new secure URL or participating in auditing. You got to try this!

6. Qualys

Know your SSL Report, check how your website score in SSL certificate. Very detailed technical information; advisable to use for system administrator, auditor, web security engineer to know and fix for any weak parameters.

7. Free SSL Server Test

It perform scan against your https URL and provide detailed following information with option to download the report in PDF format.

  • PCI DSS Compatibility
  • NIST Guidelines Compatibility
  • DH Size
  • Supported Protocols
  • Supported Ciphers
  • TLS Fallback
  • Renegotiation Support
  • Preferred Cipher Suites
  • Third Party Content


Comodo Analyzer scans your https URL and gives you quick reports on various parameters including:

  • Serial Number
  • Fingerprint
  • SSL Cert Validity
  • Cert Issuer
  • Supported Protocol (TLS/SSL)
  • Downgrade Protection
  • Secure Renegotiation (Service/Client-initiated)
  • Compression
  • Session Tickets
  • Enabled Cipher Suites

9. SSL Checker

One good thing about SSL Checker is that it has an option to add a reminder (30 days before) about SSL cert expiry. This is great, as I don’t think any other providing this feature in free. Along with this awesome feature, it verify the basic stuff like:

  • Chain Cert
  • Root Cert
  • Signature algorithm
  • Fingerprint
  • Chain Details
  • SAN

10. HowsMySSL

This is different. It scans the client (browser) and gives you status on various checks like:

  • Supported Protocol Version
  • Compression
  • Session Ticker Support
  • Cipher Supported

To test the client, just access the HowsMySSL from browser.

Other dedicated online tool to verify

Check for POODLE vulnerability

Check for FREAK vulnerability

Check for LogJam vulnerability

Check for SHA-1 vulnerability

I believe above listed free online tool is sufficient to validate SSL certificate parameter and gives good technical information for auditing and and keep your web application secure. If you like this, share with your friends.

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