Since the Redbex Application Server accesses the Redbex Application Server Database it is essential that the computer on which the Application Server is installed has a network connection to the Database Server on which the Redbex Application Server Database is hosted.

The SQL Server on which the Application Server Database is hosted must allow connections from the host running the Application Server. If the SQL Server and the Application Server are in the same local network without firewalls and NAT between them (and this scenario is highly recommended) network access is usually no problem. However Windows firewall software might have to be configured to allow the connections to the SQL Server

Microsoft SQL Server is a Winsock application that communicates over TCP/IP by using the sockets network library. SQL Server listens for incoming connections on a particular port. The default port for SQL Server is 1433. The port doesn't need to be 1433, but 1433 is the official Internet Assigned Number Authority (IANA) socket number for SQL Server.