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Error connecting to intranet site - ssl_error_illegal_parameter_alert

Firefox Privacy and security
lzzlong replied 11 years ago
lzzlong
lzzlong

Since updating to Firefox 35, some (not all) of my firm's intranet sites do not load. The most relevant post (https://support.mozilla.org/en-US/questions/1041524) is not helpful since, like the person reporting this issue, our firm only supports IE for internal sites. How can I bypass this error for intranet sites (I no longer see this option)?

An error occurred during a connection to <intranet site>. SSL peer rejected a handshake message for unacceptable content. (Error code: ssl_error_illegal_parameter_alert) 

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.
Since updating to Firefox 35, some (not all) of my firm's intranet sites do not load. The most relevant post (https://support.mozilla.org/en-US/questions/1041524) is not helpful since, like the person reporting this issue, our firm only supports IE for internal sites. How can I bypass this error for intranet sites (I no longer see this option)? An error occurred during a connection to <intranet site>. SSL peer rejected a handshake message for unacceptable content. (Error code: ssl_error_illegal_parameter_alert) The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem.

All Replies (2)

cor-el
cor-el
  • Moderator

The website might be using a cipher suit that is no longer considered secure and safe and is blocked in current releases.

You can open the about:config page via the location/address bar and use its search bar to locate this pref:

  • security.tls.insecure_fallback_hosts

You can double-click the line to modify the pref and add the domain to this pref. If there are already websites (domains) in this list then add a comma and the new domain (no spaces). You should only see domains separated by a comma in the value column.

lzzlong
lzzlong Question owner

This did not work; I also tried changing the "network.websocket.allowInsecureFromHTTPS" setting from false to true, but this also did not work.