sudo nmap -p 623 -sU -P0 192.168.1.253
Host discovery disabled (-Pn). All addresses will be marked 'up' and scan times will be slower.
Starting Nmap 7.91 ( https://nmap.org ) at 2021-04-11 21:06 EDT
Nmap scan report for awesomo-ipmi.ktz.lan (192.168.1.253)
Host is up (0.00034s latency).
PORT STATE SERVICE
623/udp open asf-rmcp
MAC Address: 00:C0:A8:12:34:56 (GVC)
Nmap done: 1 IP address (1 host up) scanned in 0.26 seconds
I also tried the password in quotes or via stdin by omitting it. I have also reset the password and power cycled the BMC.
Don’t bother with old IPMI for now, keep using lanplus. Add -v for verbosity to get useful output (up to 3), as right now the output is mostly worthless.