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Firefox Nightly 57: "Secure Connection failed" error for https://dlc.iec.cat/ (in Firefox 55 is OK)

  • 3 replies
  • 22 have this problem
  • 1 view
  • Last reply by cor-el

jordis
jordis
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The site https://dlc.iec.cat/ stopped working in Firefox 57 Nightly. It shows a "Secure Connection failed" error message and I cannot add an exception. It works OK in Firefox 55 (release). The main site https://www.iec.cat is working fine in Firefox 57 Nightly,

Any clue?

The site https://dlc.iec.cat/ stopped working in Firefox 57 Nightly. It shows a "Secure Connection failed" error message and I cannot add an exception. It works OK in Firefox 55 (release). The main site https://www.iec.cat is working fine in Firefox 57 Nightly, Any clue?

Chosen solution

¡Hola!

As you can tell form https://www.ssllabs.com/ssltest/analyze.html?d=dlc.iec.cat there are lots of issues, please get in touch with the site owner and ask them to fix.

¡Gracias!

Read this answer in context 👍 2

All Replies (3)

alex_mayorga
alex_mayorga
  • Moderator
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Chosen Solution

¡Hola!

As you can tell form https://www.ssllabs.com/ssltest/analyze.html?d=dlc.iec.cat there are lots of issues, please get in touch with the site owner and ask them to fix.

¡Gracias!

jordis
jordis Question owner
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OK! Done that, thank you Alex!

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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I can confirm this in Nightly. The current Beta and Developer Edition versions (56) still work This server only supports TLS 1.0 and TLS_RSA_WITH_3DES_EDE_CBC_SHA for Firefox.

This site works for me if I enable this cipher suite on the about:config page (the only one that is false).

  • security.ssl3.rsa_des_ede3_sha

Note that there are also intermediate certificate issues.

  • COMODO RSA Domain Validation Secure Server CA

Bug 1386754 - Disable 3DES in TLS Handshake for Nightly builds

(please do not comment in bug reports
https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)