Kerberos authentication is available on 32-bit Windows and Linux. For a list of tested Kerberos clients, see ![[external link]](gif/external.gif)
SQL Anywhere Supported Kerberos Clients.
The following table lists the default names and locations of the keytab and GSS-API files used by the supported Kerberos clients.
| Kerberos client | Default keytab file | GSS-API library file name | Notes |
|---|---|---|---|
| Windows MIT Kerberos client | C:\WINDOWS\krb5kt | gssapi32.dll | The KRB5_KTNAME environment variable can be set before starting the database server to specify a different keytab file. |
| Windows CyberSafe Kerberos client | C:\Program Files\CyberSafe\v5srvtab | gssapi32.dll | The CSFC5KTNAME environment variable can be set before starting the database server to specify a different keytab file. |
| Unix MIT Kerberos client | /etc/krb5.keytab | libgssapi_krb5.so1 | The KRB5_KTNAME environment variable can be set before starting the database server to specify a different keytab file. |
| Unix CyberSafe Kerberos client | /krb5/v5srvtab | libgss.so1 | The CSFC5KTNAME environment variable can be set before starting the database server to specify a different keytab file. |
| Unix Heimdal Kerberos client | /etc/krb5.keytab | libgssapi.so.11 |
1 These file names may vary depending on your operating system and Kerberos client version.