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R
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rherm1321
Newcomer
October 5, 2021
Solved

SSL_ERROR_RX_RECORD_TOO_LONG

  • October 5, 2021
  • 7 replies
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Participated in scheduled Zoom business meeting today on Win 10 PC using the Zoom app v5.7.4 (804) .  When it ended, there was a prompt to upgrade to the latest version of Zoom.  Got error saying the download failed.

 

Tried the manual download option using Firefox 92.0.1 but keep getting this error: SSL_ERROR_RX_RECORD_TOO_LONG

 

Tried every suggestion I could find on line but nothing helps.  I don't have -or want- another browser on this PC.  And obviously, FF worked previously to download the Zoom app since it's been installed and running properly for over a year.

 

Any suggestions?

Thanks!

 

 

    Best answer by Rupert

    I see that, in fact, the Zoom exe URL above from http://zoom.us/client/ actually redirects behind the scenes to a https://cdn.zoom.us/ URL. 

     

    As a test - are you able to access https://cdn.zoom.us/ ? Though the base URL only returns an Access Denied XML page, it should still validate the SSL - or maybe not in your case? This would be a good test.

     

    If you're problem is getting to cdn.zoom.us, maybe this need adding to any whitelist you may have - or maybe there are some other restrictions to that URL or hostname for you.

     

    cdn.zoom.us seems to resolve to Cloudflare for me.

     

    Could there be any restriction in place on your network or in your location?

    7 replies

    Rupert
    Community Champion | Customer
    Rupert
    Community Champion | Customer
    October 5, 2021

    Hi @rherm1321 

     

    Maybe you can try the non HTTPS link: 

     

    http://zoom.us/client/5.8.0.1324/ZoomInstaller.exe?archType=x64

     

     

    Bort
    Employee
    Bort
    Employee
    October 5, 2021

    Looks like its related to Avast antivirus: https://support.mozilla.org/en-US/questions/1222739

    Might follow the tips in that FF forum post. 

      R
      Newcomer
      rherm1321Author
      Newcomer
      October 5, 2021

      @Rupert  -   Get same error message using your link.

      @Bort   -        Don't have Avast; only use Windows Defender (Windows Security)

      I've tried changing these FF settings:

      Set to TLS 1.2  instead of TLS 1.3 

      Set Enhanced Tracking to Standard

      Disabled Block dangerous and deceptive content

      Disabled DNS over https-only mode

      Cleared FF cache, cookies, history

      Disabled all FF extensions

      Still the same SSL error after all those changes were made.  

      Any other suggestions?

      Thanks, kindly...!

      Rupert
      Community Champion | Customer
      Rupert
      Community Champion | Customer
      October 5, 2021

      Hi @rherm1321 

       

      Can you try the download in a Private Browser window?

       

      Can you also try https://zoom.us:443/client/5.8.0.1324/ZoomInstaller.exe?archType=x64 ? (note :explicit port number)

       

      R
      Newcomer
      rherm1321Author
      Newcomer
      October 6, 2021

      @Rupert  With all the FF changes mentioned above still in effect, opening your original link in a private window gives the same SSL length error.

       

      Opening your new port-specific link in a "regular" window also gives the  same SSL length error, and opening it in a private window gives this new error:  SSL_ERROR_BAD_MAC_READ

       

      Appreciate your time and input...

      R
      Newcomer
      rherm1321Author
      Newcomer
      October 6, 2021

      I found this about the bad_mac_read error with FF, but putting http://zoom.us/client/5.8.0.1324/ZoomInstaller.exe in the list of Insecure FallBack Hosts  also doesn't help...

      Rupert
      Community Champion | Customer
      RupertAnswer
      Community Champion | Customer
      October 6, 2021

      I see that, in fact, the Zoom exe URL above from http://zoom.us/client/ actually redirects behind the scenes to a https://cdn.zoom.us/ URL. 

       

      As a test - are you able to access https://cdn.zoom.us/ ? Though the base URL only returns an Access Denied XML page, it should still validate the SSL - or maybe not in your case? This would be a good test.

       

      If you're problem is getting to cdn.zoom.us, maybe this need adding to any whitelist you may have - or maybe there are some other restrictions to that URL or hostname for you.

       

      cdn.zoom.us seems to resolve to Cloudflare for me.

       

      Could there be any restriction in place on your network or in your location?

      R
      Newcomer
      rherm1321Author
      Newcomer
      October 6, 2021

      @Rupert  Went to https://cdn.zoom.us/ and got the Access Denied page with no SSL errors.  Win 10 on my PC is configured to use Cloudflare DNS.  No restrictions on my network or location.  I'm in US and have fiber optic broadband. 

       

      After I tried the cdn.zoom.us link, I tried the Zoom download link again this morning and it worked!  Pity I didn't try the download link before trying the cdn link.  Maybe just going to the cdn link validated the SSL and allowed me to access the download.   Or, did Zoom have a website issue that got fixed overnight..?

       

      And for the record, I undid all the FF settings changes listed in my OP last night before shutting down.  So  all my strict settings were in place this morning when I got the download to work today.  

       

      Appreciate your time and efforts! 

      R
      Newcomer
      rherm1321Author
      Newcomer
      October 7, 2021

      Still don't understand what changed, but if this SSL problem in FF pops up again, suggest going to the cdn site and then trying the update site again. 

       

      And for the record, the download link is still working this morning.  Amazing!  😃

      M
      Newcomer
      mencia25
      Newcomer
      August 18, 2025

      The “SSL_ERROR_RX_RECORD_TOO_LONG” issue only occurs in Mozilla Firefox. It states that the website you are attempting to visit is unavailable "because the authenticity of the received data could not be verified." In a nutshell, the SSL certificate’s improper configuration is the most typical issue, which prevents your browser from successfully establishing a connection with the server’s port. There are many different methods to solve the error that can be helpful, such as:-

       

      1) Erase the Cache and History for Your Browser

      2) Update Firefox browser

      3) Uninstall Extensions

      4) Utilize the HTTP Protocol

      5) Update your proxy settings

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