Using the gsscred Table
The gsscred table is used by an NFS server when the server is
trying to identify a Kerberos user, if the default mappings are not sufficient.
The NFS service uses UNIX IDs to identify users. These IDs are not
part of a user principal or a credential. The gsscred table provides additional
mapping from GSS credentials to UNIX UIDs (from the password file). The table
must be created and administered after the KDC database is populated. See Mapping GSS Credentials to UNIX Credentials
for more information.
When a client request comes in, the NFS service tries to map
the credential name to a UNIX ID. If the mapping fails, the gsscred
table is checked.