Older versions of Security Center (prior to 5.4) do not support the Transport Layer Security (TLS) protocol. Therefore, supporting them makes your system more vulnerable to network attacks. To increase the security of your system, you must disable backward compatibility.
What you should know
- Connect to Server Admin of your main server with a web browser.
- Click the main server () in the server list.
Under Secure communication, clear the Allow
unauthenticated connections (5.3 and earlier) option.
IMPORTANT: The next time someone tries to connect to your system with an older Security Center application, they will get the Client-server versions are incompatible error.