Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

לאתר זה תהיה פונקציונליות מוגבלת בזמן שאנו מתחזקים אותו לשיפור החוויה שלך. אם מאמר מסויים לא פותר את הבעיה שלך וברצונך לשאול שאלה, קהילת התמיכה שלנו מחכה לעזור לך ב־Twitter תחת ‎@FirefoxSupport וב־Reddit תחת ‎/r/firefox.

Avatar for Username

חיפוש בתמיכה

יש להימנע מהונאות תמיכה. לעולם לא נבקש ממך להתקשר או לשלוח הודעת טקסט למספר טלפון או לשתף מידע אישי. נא לדווח על כל פעילות חשודה באמצעות באפשרות ״דיווח על שימוש לרעה״.

מידע נוסף

אשכול זה הועבר לארכיון. נא לשאול שאלה חדשה אם יש לך צורך בעזרה.

Why does Firefox get "SecureConnectionFailed - PR_CONNECT_ABORTED_ERROR" when connecting to website that has the SHA1 hash disabled?

SPI_help
SPI_help
more options

Security consultants have advised that cipher suites using the SHA1 hash are no longer considered secure and should not be enabled.

Using the nmap tool we can identify which cipher suites use the SHA1 hash.

On our webserver, (IIS version 8.5 on Windows 2012 R2 ) if we eliminate cipher suites that contain the SHA1 hash, the Firefox browser cannot browse the site. Error displayed = Secure Connection Failed - PR_CONNECT_ABORTED_ERROR We tested versions up to Firefox ( v75.0 ).

Other browsers such as Chrome and IE have no issues browsing our site with the SHA1 hash disabled.

Once the SHA1 hash is enabled, Firefox works fine. Seeking a solution that will satisfy the security folks and our Firefox users.

Security consultants have advised that cipher suites using the SHA1 hash are no longer considered secure and should not be enabled. Using the nmap tool we can identify which cipher suites use the SHA1 hash. On our webserver, (IIS version 8.5 on Windows 2012 R2 ) if we eliminate cipher suites that contain the SHA1 hash, the Firefox browser cannot browse the site. Error displayed = Secure Connection Failed - PR_CONNECT_ABORTED_ERROR We tested versions up to Firefox ( v75.0 ). Other browsers such as Chrome and IE have no issues browsing our site with the SHA1 hash disabled. Once the SHA1 hash is enabled, Firefox works fine. Seeking a solution that will satisfy the security folks and our Firefox users.
צילומי מסך מצורפים

כל התגובות (1)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 25 Contributor
more options

You can see the ones supported by Firefox by visiting this page in Firefox:

https://clienttest.ssllabs.com:8443/ssltest/viewMyClient.html

The ones in green text do not use SHA1. You'll notice 3 ciphers for TLS 1.3, then 3 ciphers for RSA (TLS_ECDHE_RSA) and 3 ciphers for ECDSA (TLS_ECDHE_ECDSA) certificates.

According to https://docs.microsoft.com/en-us/wind.../tls-cipher-suites-in-windows-8-1, you might not be able to connect using an RSA certificate: Windows Server 2012 R2 appears only to have "CBC" ciphers for SHA256 and SHA384, and Firefox only has "CBC" ciphers below that level. However, with an ECDSA certificate, there appears to be an overlap:

  • TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256