You should properly secure the databases, platforms, and servers that you use for P6 EPPM. You might find the links below helpful when planning your security strategy (not a comprehensive list).
Note: The URLs below might have changed after Oracle published this guide.
https://docs.oracle.com/database/121/DBSEG/toc.htm
http://www.oracle.com/technetwork/articles/servers-storage-admin/secure-linux-env-1841089.html
https://www.microsoft.com/en-us/server-cloud/products/sql-server/Resources.aspx
https://www.microsoft.com/en-us/server-cloud/products/sql-server-editions/overview.aspx
http://www.oracle.com/technetwork/middleware/weblogic/documentation/index.html
http://download.oracle.com/docs/cd/E12840_01/wls/docs103/secmanage/ssl.html
http://download.oracle.com/docs/cd/E12839_01/security.htm
Authentication Options for P6 EPPM
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Last Published Friday, February 09, 2018