HTTPS Readiness test

Input

Check here if your site complies with the HTTPS best practices

Domain analysis: twitter.com

  • Always redirect to same domain https://twitter.com (BEST PRACTICE!)
  • IP address: 104.244.42.1

    • Certificate details

  • This SSL Certificate was created especially for twitter.com
  • Certificate issued by DigiCert Inc, of type DigiCert TLS RSA SHA256 2020 CA1
  • Certificate start date: Feb 5 00:00:00 2021 GMT
  • Certificate expiration: Feb 4 23:59:59 2022 GMT (in 136 days)
  • Certificate validity period: 1 year(s) => commercial (paid) certificate
  • Encryption algorithm: TLSv1.3 / TLS_AES_256_GCM_SHA384
    • More certificate details?
  • SSL Labs: get more detailed HTTPS report
  • Mozilla Observatory: get more detailed HTTPS report

    • HTTPS Headers

  • Missing HTTP header x-xss-protection - should be 1; mode=block
  • HTTP header x-frame-options is OK - iframe clickjacking protection
  • HTTP header content-security-policy is OK - cross-scripting protection
  • HTTP header strict-transport-security (HSTS) is OK (243 months valid)
  • For a GDPR-focused review of your domain, use Churlie GDPR Checkup

    • Content details

  • No mixed content: no http files used in the https page

    • How to get https for your site

  • Let’s Encrypt is a free, automated, and open Certificate Authority.
    Example: cloudfleet.io, scotthelme.co.uk
  • Cloudflare One-Click SSL (also on the Free Plan)
    Example: toolstud.io
  • Paid certificates: Verisign, GeoTrust, Comodo, DigiCert, Thawte, Globalsign
    Example: www.amazon.com, www.mozilla.org, twitter.com

    • References

  • Google Chrome and/or Search will punish your website for insecure content and practices. In short, every site should be https://, and should send every visitor of their http:// site to the secure one.
  • Google Chrome: Our plan to label HTTP sites as non-secure is taking place in gradual steps
  • Data Security Action Plan, step 1: Implement strict encryption measures on all network traffic
  • BuiltWith: SSL by Default Usage Statistics
  • Analysis of the Alexa Top 1M sites: HTTPS, HSTS, CSP