config/shadow/login.access

   1 # $Id$
   2 #
   3 # Login access control table.
   4 #
   5 # When someone logs in, the table is scanned for the first entry that
   6 # matches the (user, host) combination, or, in case of non-networked
   7 # logins, the first entry that matches the (user, tty) combination.  The
   8 # permissions field of that table entry determines whether the login will
   9 # be accepted or refused.
  10 #
  11 # Format of the login access control table is three fields separated by a
  12 # ":" character:
  13 #
  14 #       permission : users : origins
  15 #
  16 # The first field should be a "+" (access granted) or "-" (access denied)
  17 # character.
  18 #
  19 # The second field should be a list of one or more login names, group
  20 # names, or ALL (always matches). A pattern of the form user@host is
  21 # matched when the login name matches the "user" part, and when the
  22 # "host" part matches the local machine name.
  23 #
  24 # The third field should be a list of one or more tty names (for
  25 # non-networked logins), host names, domain names (begin with "."), host
  26 # addresses, internet network numbers (end with "."), ALL (always
  27 # matches) or LOCAL (matches any string that does not contain a "."
  28 # character).
  29 #
  30 # If you run NIS you can use @netgroupname in host or user patterns; this
  31 # even works for @usergroup@@hostgroup patterns. Weird.
  32 #
  33 # The EXCEPT operator makes it possible to write very compact rules.
  34 #
  35 # The group file is searched only when a name does not match that of the
  36 # logged-in user. Only groups are matched in which users are explicitly
  37 # listed: the program does not look at a user's primary group id value.
  38 #
  39 ##############################################################################
  40 #
  41 # Disallow console logins to all but a few accounts.
  42 #
  43 #-:ALL EXCEPT wheel shutdown sync:console
  44 #
  45 # Disallow non-local logins to privileged accounts (group wheel).
  46 #
  47 #-:wheel:ALL EXCEPT LOCAL .win.tue.nl
  48 #
  49 # Some accounts are not allowed to login from anywhere:
  50 #
  51 #-:wsbscaro wsbsecr wsbspac wsbsym wscosor wstaiwde:ALL
  52 #
  53 # All other accounts are allowed to login from anywhere.
  54 #