NAME
ftpusers,
ftpchroot —
ftpd(8) access
control file
DESCRIPTION
The
ftpusers file provides user access control for
ftpd(8) by defining which users
may login.
If the
ftpusers file does not exist, all users are denied
access.
A “\” is the escape character; it can be used to escape the meaning
of the comment character, or if it is the last character on a line, extends a
configuration directive across multiple lines. A “#” is the
comment character, and all characters from it to the end of line are ignored
(unless it is escaped with the escape character).
The syntax of each line is:
userglob[:groupglob][@host] [directive
[class]]
These elements are:
-
-
- userglob
- matched against the user name, using
fnmatch(3) glob matching
(e.g, ‘f*’).
-
-
- groupglob
- matched against all the groups that the user is a member
of, using fnmatch(3) glob
matching (e.g, ‘*src’).
-
-
- host
- either a CIDR address (refer to
inet_net_pton(3)) to
match against the remote address (e.g, ‘1.2.3.4/24’), or an
fnmatch(3) glob to match
against the remote hostname (e.g, ‘*.NetBSD.org’).
-
-
- directive
- If “allow” or “yes” the user is
allowed access. If “deny” or “no”, or
directive is not given, the user is denied access.
-
-
- class
- defines the class to use in
ftpd.conf(5).
If
class is not given, it defaults to one of the following:
-
-
- chroot
- If there is a match in
/etc/ftpchroot for the user.
-
-
- guest
- If the user name is “anonymous” or
‘ftp’.
-
-
- real
- If neither of the above is true.
No further comparisons are attempted after the first successful match. If no
match is found, the user is granted access. This syntax is backward-compatible
with the old syntax.
If a user requests a guest login, the
ftpd(8) server checks to see that
both “anonymous” and “ftp” have access, so if you deny
all users by default, you will need to add both “anonymous allow”
and “ftp allow” to
/etc/ftpusers in order to
allow guest logins.
/etc/ftpchroot
The file
/etc/ftpchroot is used to determine which users will
have their session's root directory changed (using
chroot(2)), either to the
directory specified in the
ftpd.conf(5)
chroot directive (if set), or to the home directory of the
user. If the file does not exist, the root directory change is not performed.
The syntax is similar to
ftpusers, except that the
class argument is ignored. If there's a positive match, the
session's root directory is changed. No further comparisons are attempted
after the first successful match. This syntax is backward-compatible with the
old syntax.
FILES
- /etc/ftpchroot
- List of normal users who should have their ftp session's
root directory changed by using
chroot(2).
- /etc/ftpusers
- This file.
- /usr/share/examples/ftpd/ftpusers
- A sample ftpusers file.
SEE ALSO
fnmatch(3),
inet_net_pton(3),
ftpd.conf(5),
ftpd(8)