10 .Nd login access control table
14 file specifies (user, host) combinations and/or (user, tty)
15 combinations for which a login will be either accepted or refused.
17 When someone logs in, the
19 is scanned for the first entry that
20 matches the (user, host) combination, or, in case of non-networked
21 logins, the first entry that matches the (user, tty) combination.
23 permissions field of that table entry determines whether the login will
24 be accepted or refused.
26 Each line of the login access control table has three fields separated by a
29 .Ar permission : Ns Ar users : Ns Ar origins
31 The first field should be a "+" (access granted) or "-" (access denied)
33 The second field should be a list of one or more login names,
34 group names, or ALL (always matches).
35 The third field should be a list
36 of one or more tty names (for non-networked logins), host names, domain
37 names (begin with "."), host addresses, internet network numbers (end
38 with "."), ALL (always matches) or LOCAL (matches any string that does
39 not contain a "." character).
40 If you run NIS you can use @netgroupname
41 in host or user patterns.
43 The EXCEPT operator makes it possible to write very compact rules.
45 The group file is searched only when a name does not match that of the
47 Only groups are matched in which users are explicitly
48 listed: the program does not look at a user's primary group id value.
50 .Bl -tag -width /etc/login.access -compact
51 .It Pa /etc/login.access