The CA Gateway Security Quarantine Manager and Reporter can use either Microsoft SQL Server 2005 or Microsoft SQL Server 2005 Express Edition as the database layer.
Depending on your environment, you can install a dedicated SQL Server 2005 Express Server on a remote machine, or install SQL Server 2005 Express Edition on the same machine as the CA Gateway Security Quarantine Manager and Reporter.
For more information about Microsoft SQL Server 2005 Express Edition, visit:
http://www.microsoft.com/express/2005/sql/default.aspx