From Serve The Home https://www.servethehome.com/basic-bmc-and-ipmi-management-security-practices/
In light of multiple stories about BMC security breaches, we wanted to put a basic BMC and IPMI management security practices article together. This is likely a piece we will update over time. It is also one where there is an entire industry catering to management interface security, so this is only going to provide some bare minimum basics. If you are a new administrator, this should help avoid the top mistakes at a minimal incremental cost.
Editorial side-note – BMC, IPMI, ILo, Redfish, Intel AMT, Intel ME, AMD PSP – these are *computers* that control your computer. Sure, they run firmware, but in almost every case it is a full blown multi-tasking, typically multi-user networked computer. So.. their security, is networked computer security. It is really boring (credit to James Mickens). Encrypted network connections. Strong, non-default passwords.. for all users. 2FA if you can manage it!
Just because you think you might not have connected it to a network, or you think the “management network” to which you attached it is secure….