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    The following form allows you to view linux man pages.

    Command:

    rpc.gssd

    
    
    

    SYNOPSIS

           rpc.gssd [-f] [-n] [-k keytab] [-p pipefsdir] [-v] [-r] [-d ccachedir]
    
    
    

    DESCRIPTION

           The  rpcsec_gss  protocol  gives  a  means of using the gss-api generic
           security api to provide security for protocols using rpc  (in  particu-
           lar,  nfs).   Before  exchanging any rpc requests using rpcsec_gss, the
           rpc client must first establish a security context.  The linux kernel's
           implementation  of  rpcsec_gss depends on the userspace daemon rpc.gssd
           to establish security contexts.  The rpc.gssd daemon uses files in  the
           rpc_pipefs filesystem to communicate with the kernel.
    
    
    

    OPTIONS

           -f     Runs  rpc.gssd  in the foreground and sends output to stderr (as
                  opposed to syslogd)
    
           -n     By default, rpc.gssd treats accesses by the user with UID 0 spe-
                  cially,  and uses "machine credentials" for all accesses by that
                  user which require Kerberos authentication.  With the -n option,
                  "machine  credentials"  will  not be used for accesses by UID 0.
                  Instead, credentials must be obtained manually  like  all  other
                  users.   Use  of  this  option  means  that "root" must manually
                  obtain Kerberos credentials before attempting to  mount  an  nfs
                  filesystem requiring Kerberos authentication.
    
           -k keytab
                  Tells  rpc.gssd  to  use  the  keys  found  in  keytab to obtain
                  "machine credentials".  The default value is "/etc/krb5.keytab".
    
                  Previous  versions  of  rpc.gssd  used  only  "nfs/*" keys found
                  within the keytab.  To be more consistent with other implementa-
                  tions,  we  now  look  for  specific keytab entries.  The search
                  order for keytabs to be used for "machine credentials" is now:
                    <HOSTNAME>$@<REALM>
                    root/<hostname>@<REALM>
                    nfs/<hostname>@<REALM>
                    host/<hostname>@<REALM>
                    root/<anyname>@<REALM>
                    nfs/<anyname>@<REALM>
                    host/<anyname>@<REALM>
    
                  If this search order does not use the correct key then provide a
                  keytab file that contains only correct keys.
    
           -p path
                  Tells rpc.gssd where to look for the rpc_pipefs filesystem.  The
                  default value is "/var/lib/nfs/rpc_pipefs".
    
           -d directory
                  Tells rpc.gssd where to look for Kerberos credential files.  The
                  default  value  is  "/tmp".   This can also be a colon separated
                  available  credentials  cache  files to be used to create a con-
                  text.  By default, the default realm, as configured in the  Ker-
                  beros configuration file, is preferred.
    
           -t timeout
                  Timeout, in seconds, for kernel gss contexts. This option allows
                  you to force new kernel contexts to be negotiated after  timeout
                  seconds,  which  allows changing Kerberos tickets and identities
                  frequently.  The default is no explicit timeout, which means the
                  kernel  context  will  live the lifetime of the Kerberos service
                  ticket used in its creation.
    
    
    

    SEE ALSO

           rpc.svcgssd(8)
    
    
    

    AUTHORS

           Dug Song <dugsong@umich.edu>
           Andy Adamson <andros@umich.edu>
           Marius Aamodt Eriksen <marius@umich.edu>
           J. Bruce Fields <bfields@umich.edu>
    
                                      14 Mar 2007                      rpc.gssd(8)
    
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