Provided by: openafs-fileserver_1.6.1-1_i386 bug

NAME

       krb.excl - Lists exclusions for mapping kerberos principals to AFS
       identities

DESCRIPTION

       /etc/openafs/server/krb.excl is an optional file that resides on an
       OpenAFS server and is used to list exceptions to the algorithm of
       mapping kerberos principals to AFS identities. It contains the name of
       one or more principals; each principal should be on a line by itself.
       If a principal appears in this file, that principal will never be
       recognized by an OpenAFS server as a local identity, even if the realm
       is specified as a local realm in krb.conf(5).

       The principal names specified in this file must include the realm, and
       should be in Kerberos 4 format. That is, specify "user.inst@REALM", not
       "user/inst@REALM", "user.inst", nor "user/inst".

RATIONALE

       It is possible to use the krb.conf(5) configuration file to specify
       that multiple Kerberos realms can be considered `local' realms by
       OpenAFS fileservers, and those realms can be used nearly
       interchangeably. A site may list "FOO.EXAMPLE.COM" and
       "BAR.EXAMPLE.COM" to allow users to access AFS by using Kerberos
       tickets from either "FOO.EXAMPLE.COM" or "BAR.EXAMPLE.COM", and be
       treated as AFS users local to that cell.

       In many setups, one realm is really a `local' realm that is managed by
       the AFS administrators, and another `foreign' realm is specified in
       krb.conf that is managed by someone else, but in the same organization.
       In such a case, the principal names for users are the same, so users
       should be able to use either realm to authenticate to AFS.  However,
       the principals for administrators are not the same between the two
       realms, and so the administrators in the `foreign' realm should not be
       considered AFS administrators. Specifying the administrator principals
       in the `foreign' realm prevents this, but still allows users to use
       either realm.

EXAMPLES

       The realms "FOO.EXAMPLE.COM" and "AD.EXAMPLE.COM" are configured to
       both be local realms, but "AD.EXAMPLE.COM" should not be used by AFS
       administrators. The AFS administrators are "admin" and "smith.admin".
       krb.excl contains:

          admin@AD.EXAMPLE.COM
          smith.admin@AD.EXAMPLE.COM

       Now if someone authenticates with tickets for
       "smith/admin@AD.EXAMPLE.COM", they will not be recognized as the
       "smith.admin" AFS identity. However, "smith@AD.EXAMPLE.COM" will be
       treated as the "smith" AFS identity, and "smith/admin@FOO.EXAMPLE.COM"
       will still be treated as "smith.admin".

SEE ALSO

       krb.conf(5)

COPYRIGHT

       Copyright 2010 Sine Nomine Associates

       This documentation is covered by the BSD License as written in the
       doc/LICENSE file. This man page was written by Andrew Deason for
       OpenAFS.