.Dd March 21, 2003 .Dt LOGIN.ACCESS 5 .Os HEIMDAL .Sh NAME .Nm login.access .Nd login access control table .Sh DESCRIPTION The .Nm login.access file specifies on which ttys or from which hosts certain users are allowed to login.
p At login, the
a /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.
p Each entry have three fields separated by colon: l -bullet t The first field indicates the permission given if the entry matches. It can be either .Dq + (allow access) or .Dq - (deny access) . t 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. t 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. .El
p 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. .Sh 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. .Sh SEE ALSO .Xr login 1 .Sh AUTHORS The .Fn login_access function was written by Wietse Venema. This manual page was written for Heimdal.