When the BMC console is lost but the host is not…

# First install ipmitool
> sudo yum install OpenIPMI ipmitool

# Lets have a look on user on channel1
> sudo ipmitool user list 1

ID  Name	     Callin  Link Auth	IPMI Msg   Channel Priv Limit
1                    false   false      true       ADMINISTRATOR
2   admin            false   false      true       ADMINISTRATOR
3   ADMIN            false   false      true       ADMINISTRATOR
4                    true    false      false      NO ACCESS
5                    true    false      false      NO ACCESS
6                    true    false      false      NO ACCESS
7                    true    false      false      NO ACCESS
8                    true    false      false      NO ACCESS
9                    true    false      false      NO ACCESS
10                   true    false      false      NO ACCESS
11                   true    false      false      NO ACCESS
12                   true    false      false      NO ACCESS
13                   true    false      false      NO ACCESS
14                   true    false      false      NO ACCESS
15                   true    false      false      NO ACCESS
16                   true    false      false      NO ACCESS

# Cold or warm reset
> sudo ipmitool mc reset cold

# Check IP info, channel1
> sudo ipmitool lan print 1
Set in Progress         : Set Complete
Auth Type Support       : NONE MD2 MD5 PASSWORD OEM
Auth Type Enable        : Callback : MD5
                        : User     : MD5
                        : Operator : MD5
                        : Admin    : MD5
                        : OEM      : MD5
IP Address Source       : Static Address
IP Address              : 10.11.32.83
Subnet Mask             : 255.255.255.0
MAC Address             : e0:d5:5e:ca:ad:48
SNMP Community String   : AMI
IP Header               : TTL=0x40 Flags=0x40 Precedence=0x00 TOS=0x10
BMC ARP Control         : ARP Responses Enabled, Gratuitous ARP Disabled
Gratituous ARP Intrvl   : 0.0 seconds
Default Gateway IP      : 10.11.32.1
Default Gateway MAC     : 00:0c:29:b3:54:98
Backup Gateway IP       : 0.0.0.0
Backup Gateway MAC      : 00:00:00:00:00:00
802.1q VLAN ID          : Disabled
802.1q VLAN Priority    : 0
RMCP+ Cipher Suites     : 0,1,2,3,6,7,8,11,12,15,16,17
Cipher Suite Priv Max   : caaaaaaaaaaaXXX
                        :     X=Cipher Suite Unused
                        :     c=CALLBACK
                        :     u=USER
                        :     o=OPERATOR
                        :     a=ADMIN
                        :     O=OEM
Bad Password Threshold  : 0
Invalid password disable: no
Attempt Count Reset Int.: 0
User Lockout Interval   : 0

# Edit user 3 properties, channel1
> sudo ipmitool -I open channel setaccess 1 3 callin=on ipmi=on link=on privilege=0x4