ODBC Driver for SQL Server

Build 20.0.7587

Kerberos Realm

The Kerberos Realm used to authenticate the user with.

Data Type


Default Value



The Kerberos properties are used when using SPNEGO or Windows Authentication. The Kerberos Realm is used to authenticate the user with the Kerberos Key Distribution Service (KDC). The Kerberos Realm can be configured by an administrator to be any string, but conventionally it is based on the domain name. If Kerberos Realm is not specified the driver will attempt to detect these properties automatically from the following locations:

  • Java System Properties: Kerberos settings can be configured in Java using a config file (krb5.conf) or using the system properties java.security.krb5.realm and java.security.krb5.kdc. The driver will use the system settings if KerberosRealm and KerberosKDC are not explicitly set.
  • Domain Name and Host: The driver will infer the Kerberos Realm and Kerberos KDC from the user-configured domain name and host as a last resort. This might work in some Windows environments.
Note: Kerberos-based authentication is supported in JRE 1.6 and above only.

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Build 20.0.7587