Can't log into a MAS server with newer browsers

[AH64Armament]

Trying to log into a Mitel Application Suite running MSL 10.0. Firefox gives me a warning that Secure Connection Failed. IE 11 gives me a similar warning.
I've tried all that I know of, and it's just not letting me in.
I can get in with an old Windows XP machine running IE 8, but it's Firefox won't connect as it's running FF 50.


Secure Connection Failed

An error occurred during a connection to xxx.xxx.xxx.xxx. Cannot communicate securely with peer: no common encryption algorithm(s). Error code: SSL_ERROR_NO_CYPHER_OVERLAP

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.

Does anyone have a work around to force the newer browsers to work in this regard? I opened a ticket with Mitel Support and their answer was simply to upgrade to keep up with the times.

 

[augustD2]

Go to the FireFox option and remove the certificate of the MAS ip address. It should be ok after that.

 

[AH64Armament]

I tried that. Still didn't work. Attempted to log into it from a system that had never connected to it in the past - but using the same version of Firefox. It wouldn't connect - same error.

I was able to get to it with the older version of Ie, but hope to retire those computers someday.

Mitel support response was to upgrade the system.

 

[sarond]

You could try this

http://www.ryananddebi.com/2014/12/10/bypassing-the-ssl_error_no_cypher_overlap-error-in-firefox-34/

 

[AH64Armament]

Firefox still doesn't work.

Ie worked when I selected Use SSL 2.0, Use SSL 3.0, Use TLS 1.0, Use TLS 1.1 and use TLS 1.2.
These settings are under internet options, advanced - scroll all the way to the bottom.

I don't use Ie for anything other than legacy things that require it, so I'm thinking that I'll be okay with this setting.

 

[Mitelpassion]

Your problem is that the browser and server cannot agree on the encryption algorithm to use. Simply put either your browser needs to support an older version or you server a newer.

Firefox, typically to be more secure, will at times remove these cyphers they deem to be unsafe or not secure enough.