Security Guide

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Generate the Keytab Files at Node Level

When you run ktpass to generate the keytab files at the node level, you associate each Kerberos principal user account with the corresponding SPN in Active Directory.

The following table shows the association between the Kerberos principal user accounts and the SPNs shown in the example SPNKeytabFormat.txt file:

User Account	Keytab Type	Service Principal Name
nodeuser01	NODE_SPN	isp/node01/InfaDomain/COMPANY.COM
httpuser01	NODE_HTTP_SPN	HTTP/US001DEV.company.com@COMPANY.COM
nodeuser02	NODE_SPN	isp/node02/InfaDomain/COMPANY.COM
httpuser02	NODE_HTTP_SPN	HTTP/US005DEV.company.com@COMPANY.COM

You also create a keytab for the LDAP bind user account that is used to access and search Active Directory during LDAP synchronization.

Create a keytab file for the Kerberos principal user account that you created for each node in Active Directory.

Copy the keytab file name from the

KEY_TAB_NAME

column in the SPNKeytabFormat.txt file. Copy the service principal name from the

SPN

column in the SPNKeytabFormat.txt file.

The following example creates a keytab file for a Kerberos principal user account named nodeuser0:

ktpass.exe -out node01.keytab -princ isp/node01/InfaDomain/COMPANY.COM -mapuser nodeuser01 -crypto all -ptype KRB5_NT_PRINCIPAL

Create a keytab file for each HTTP process Kerberos principal user account that you created in Active Directory.

If the domain uses Kerberos cross realm authentication, the principal user account can exist in any Kerberos realm the domain uses.

Copy the keytab file name from the

KEY_TAB_NAME

column in the SPNKeytabFormat.txt file. Copy the service principal name from the

SPN

column in the SPNKeytabFormat.txt file.

The following example creates a keytab file for a Kerberos principal user account named httpuser01:

ktpass.exe -out webapp_http.keytab -princ HTTP/US001DEV.company.com@COMPANY.COM -mapuser httpuser01 -crypto all -ptype KRB5_NT_PRINCIPAL

Create a keytab for the LDAP bind user account that is used to access and search Active Directory during LDAP synchronization.

Structure the value for the -princ option as <principal name>@<KERBEROS REALM>. Include the name of the LDAP configuration for the Active Directory server in the keytab file name. Structure the keytab file name as follows: <Active Directory LDAP configuration_name>.keytab.

The following example creates a keytab file for a service principal user account named ldapuser:

ktpass.exe -out ActiveDirectoryServer1.keytab -princ ldapuser@COMPANY.COM -mapuser ldapuser -crypto all -ptype KRB5_NT_PRINCIPAL

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Security Guide

Security Guide

Generate the Keytab Files at Node Level

Generate the Keytab Files at Node Level