I would like to try to hack our dev servers (they are a replication of our producution servers). We have implemented several new layers of security including a Cisco Pix 501 firewall and IPTables. But I am hoping somebody can shed some light on how I would go about trying to hack my own server to ensure they are secure. We already do port scaning to ensure there aren't any extra open ports that aren't being used. Are there applications that I can use for password hacking? etc. Thanks for the help in advance.
Specs: (Three tier architecture)
Jrun4 w/ CFMX