Platform R1304GZ4GC, server board S2600GZ
BIOS 02.06.0005, BMC FW 01.27.9958
After trying logon with bad password using https BMC stop to respond to http, https and even telnet.
Only a complete power outage allows reconnect to RMM
This screen - login to RMM4 through separate RMM Lan or Lan1 with correct password
and this one - after first wrong password