Database connection issue

[AmitPatnaik]

Unable to determine whether database exists - A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 - An existing connection was forcibly closed by the remote host.) BP is installed in windows server I have my personal system that is able to connect to the Database and one server machine  that is not. machine os : windows 2012 R2 This is kind of high priority task so the faster response will be appreciated

[John__Carter]

Sounds like the app server machine can't talk to the DB server, so probably network related - blocked ports, firewall etc.

[AmitPatnaik]

That's not the case. We have separate DB for testing purpose that's getting connected but the main DB is not. I have confirmed that no firewall and port is blocked.  

[John__Carter]

OK so the app server can reach the DB server, but the error says it can't find the DB. Sanity-check the DB name spelling being used? Confirm the authentication being used is valid for that DB?