The keytab file (UNIX™ and Linux™)
All Kerberos server computers on UNIX™ and Linux™ must have a keytab file to authenticate with the Key Distribution Center.
A keytab file is an encrypted copy of the Informix® service key. This file must be on the computer hosting Informix® so that the DBMS can authenticate with the Key Distribution Center (KDC) and can accept the client's security context.
For instructions on adding a key to the keytab file, see the documentation provided with the Kerberos product.