Hopefully this is an easy fix as I don't truly understand ciphers etc...
We have a spam filter (Websense). Our users get emailed a link daily allowing them to see what spam they have. If they use Firefox they get an error message with the following:
An error occurred during a connection to c*****:8443. SSL received a weak ephemeral Diffie-Hellman key in Server Key Exchange handshake message. (Error code: ssl_error_weak_server_ephemeral_dh_key)
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.
Is the issue on the server end or in Firefox? I've installed IIS Crypto on the Server so I can see protocols, ciphers, cipher suites, Hashes Key Exchanges etc but am unsure on what to do. I also have seen the work around where you can go into the config of Firefox and change some setting to false to bypass some of the security settings but this doesn't seem like a practical solution.
Ideas or help?
fwiw users with Chrome get a similar message but IE and Opera users can connect fine?