login.access(5) [freebsd man page]

LOGIN.ACCESS(5) 					      BSD File Formats Manual						   LOGIN.ACCESS(5)

NAME

     login.access -- login access control table

DESCRIPTION

     The login.access file specifies (user, host) combinations and/or (user, tty) combinations for which a login will be either accepted or
     refused.

     When someone logs in, the login.access is scanned for the first entry that matches the (user, host) combination, or, in case of non-networked
     logins, the first entry that matches the (user, tty) combination.	The permissions field of that table entry determines whether the login
     will be accepted or refused.

     Each line of the login access control table has three fields separated by a ':' character: permission:users:origins

     The first field should be a "+" (access granted) or "-" (access denied) character.  The second field should be a list of one or more login
     names, group names, or ALL (always matches).  The third field should be a list of one or more tty names (for non-networked logins), host
     names, domain names (begin with "."), host addresses, internet network numbers (end with "."), ALL (always matches) or LOCAL (matches any
     string that does not contain a "." character).  If you run NIS you can use @netgroupname in host or user patterns.

     The EXCEPT operator makes it possible to write very compact rules.

     The group file is searched only when a name does not match that of the logged-in user.  Only groups are matched in which users are explicitly
     listed: the program does not look at a user's primary group id value.

FILES

     /etc/login.access	login access control table

SEE ALSO

     login(1), pam_login_access(8)

AUTHORS

     Guido van Rooij

BSD
								September 13, 2006							       BSD

LOGIN.ACCESS(5)                                               BSD File Formats Manual                                              LOGIN.ACCESS(5)

NAME

     login.access -- login access control table

DESCRIPTION

     The login.access file specifies on which ttys or from which hosts certain users are allowed to login.

     At login, the /etc/login.access file is checked for the first entry that matches a specific user/host or user/tty combination. That entry can
     either allow or deny login access to that user.

     Each entry have three fields separated by colon:

     o   The first field indicates the permission given if the entry matches.  It can be either ``+'' (allow access) or ``-'' (deny access) .

     o   The second field is a comma separated list of users or groups for which the current entry applies. NIS netgroups can used (if configured)
         if preceeded by @. The magic string ALL matches all users.  A group will match if the user is a member of that group, or it is the user's
         primary group.

     o   The third field is a list of ttys, or network names. A network name can be either a hostname, a domain (indicated by a starting period),
         or a netgroup. As with the user list, ALL matches anything. LOCAL matches a string not containing a period.

     If the string EXCEPT is found in either the user or from list, the rest of the list are exceptions to the list before EXCEPT.

BUGS

     If there's a user and a group with the same name, there is no way to make the group match if the user also matches.

SEE ALSO

     login(1)

AUTHORS

     The login_access() function was written by Wietse Venema. This manual page was written for Heimdal.

HEIMDAL                                                           March 21, 2003                                                           HEIMDAL