Some versions of Chrome or Firefox have stringent rules on SSL keys which will block the Appeon plug-in download and throw an error “Server has a week ephemeral Diffe-Hellman public key”, as shown below.

Solution: this issue occurs only when the Appeon Server is a Java application server running with JDK 1.6 or lower version. You can upgrade to JDK 1.7 to avoid this issue.