What was confusing me, but that finally helped me to solve the problem, was the fact that old credentials were still valid to enter the IDRAC web interface. By Changing the motherboard, and restoring a user database hashed by a from-now-on unknown key, my credentials became invalid, at least for using ipmitool and IPMIv2 interface. Why : I understood that passwords were hashed/encrypted in my previous motherboard with a key specific to that old motherboard. > check "change your password" checkbox and enter the same (or new) password > Click on the userID of your admin account -> Next Then : Menu Overview -> IDRAC SETTINGS -> User Authentication In your browser, enter the (static) ip address of the IDRAC : this should open an https web site. I had exactly the same issue on a Dell Poweredge R430 machine after having changed the system motherboard:Īlthough my credentials were restored in the new IDRAC board from the chassis flash backup, and despite the fact my credentials still allowed me to enter the IDRAC Web Interface, I was not able anymore to interact with the IDRAC board through IPMIv2/lanplus/SOL interface, facing the same problem of Error: Unable to establish IPMI v2 / RMCP+ session.įor me the solution was, as suggested by Rupeshrams herein, to "reset ipmi default password to the same old one" ("same" because I had system tools all hardcoded with old credentials) with the IDRAC Web Interface as this : Nmap done: 1 IP address (1 host up) scanned in 2.11 seconds I use nmap get bellow information: # nmap -p 623 -sU -P0 172.16.22.237 IP Header : TTL=0x00 Flags=0x00 Precedence=0x00 TOS=0x00īMC ARP Control : ARP Responses Enabled, Gratuitous ARP Disabled In the being controlled Server I use ipmitool checked the lan: ~]# ipmitool -I open lan print 1Īuth Type Support : NONE MD2 MD5 PASSWORDĪuth Type Enable : Callback : MD2 MD5 PASSWORD I installed the ipmitool 1.8.18 in the CentOS7.2 Dedicated Server, I can use it for check self own ipmi data: # ipmitool -I open power statusīut I want to check other ipmi address' status, I will get this error: # ipmitool -H 172.16.22.237 -U root -P mypassword -I lanplus chassis status -vĮrror issuing Get Channel Authentication Capabilities requestĮrror: Unable to establish IPMI v2 / RMCP+ session
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