Users Guide

Registering iDRAC as a computer in Active Directory root domain
To register iDRAC in Active Directory root domain:
1. Click Overview > iDRAC Settings > Network > Network.
The Network page is displayed.
2. Provide a valid Preferred/Alternate DNS Server IP address. This value is a valid DNS server IP address that is part of the
root domain.
3. Select Register iDRAC on DNS.
4. Provide a valid DNS Domain Name.
5. Verify that network DNS configuration matches with the Active Directory DNS information.
For more information about the options, see the iDRAC Online Help.
Generating Kerberos keytab file
To support the SSO and smart card login authentication, iDRAC supports the configuration to enable itself as a kerberized
service on a Windows Kerberos network. The Kerberos configuration on iDRAC involves the same steps as configuring a non–
Windows Server Kerberos service as a security principal in Windows Server Active Directory.
The ktpass tool (available from Microsoft as part of the server installation CD/DVD) is used to create the Service Principal
Name (SPN) bindings to a user account and export the trust information into a MIT–style Kerberos keytab file, which enables a
trust relation between an external user or system and the Key Distribution Centre (KDC). The keytab file contains a
cryptographic key, which is used to encrypt the information between the server and the KDC. The ktpass tool allows UNIX–
based services that support Kerberos authentication to use the interoperability features provided by a Windows Server Kerberos
KDC service. For more information on the ktpass utility, see the Microsoft website at: technet.microsoft.com/en-us/
library/cc779157(WS.10).aspx
Before generating a keytab file, you must create an Active Directory user account for use with the -mapuser option of the
ktpass command. Also, you must have the same name as iDRAC DNS name to which you upload the generated keytab file.
To generate a keytab file using the ktpass tool:
1. Run the ktpass utility on the domain controller (Active Directory server) where you want to map iDRAC to a user account in
Active Directory.
2. Use the following ktpass command to create the Kerberos keytab file:
C:\> ktpass.exe -princ HTTP/[e-mail] -mapuser
DOMAINNAME\username -mapOp set -crypto AES256-SHA1 -ptype KRB5_NT_PRINCIPAL -pass
[password] -out c:\krbkeytab
The encryption type is AES256-SHA1. The principal type is KRB5_NT_PRINCIPAL. The properties of the user account to
which the Service Principal Name is mapped to must have Use AES 256 encryption types for this account property
enabled.
NOTE:
Use lowercase letters for the iDRACname and Service Principal Name. Use uppercase letters for the domain
name as shown in the example.
3. Run the following command:
C:\>setspn -a HTTP/iDRACname.domainname.com username
A keytab file is generated.
NOTE:
If you find any issues with iDRAC user for which the keytab file is created, create a new user and a new keytab
file. If the same keytab file which was initially created is again executed, it does not configure correctly.
Creating Active Directory objects and providing privileges
Perform the following steps for Active Directory Extended schema based SSO login:
1. Create the device object, privilege object, and association object in the Active Directory server.
2. Set access privileges to the created privilege object. It is recommended not to provide administrator privileges as this could
bypass some security checks.
Configuring iDRAC for Single Sign-On or smart card login
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