Hi Jakkie, The management tools it is referencing is OMSA. You should have turned it off already. You may want to also turn of serial redirection in the bios.
Hi, first I would like to thank everyone in advance. I have PowerEdge T410 (11G, BMC only - no IDRAC card), and this server will be moved to some "unfriendly" network, with big risk of some remote access exploitation, but with absolutely no need for remote administration. Therefore I'd like to completely disable BMC management NIC functionality. So far i managed to disable IPMI in BMC setup utility (CTRL+E) and SOL (Serial-Over-Lan) with OMSA. And I'd like to know some best practises for this situation. In the T410 HW Owner's Manual there is some mention on page 47, where system message "MANAGEMENT SHARED NIC= " is mentioned. It says management shared NIC can be enabled/disabled by some "System Management software", so this might be some way to go, but i don't know which exactly utility to use. So finally the question is: What utility to use for disabling management shared NIC for integrated NICs, while keeping its normal usability by OS? Sorry for long introduction, thank you very much, Jakkie. 
Disabling management shared NIC (BMC) on PowerEdge T410