freebsd-skq/libexec/ftpd/ftpchroot.5
Yaroslav Tykhiy 8657b576d8 Extend the format of /etc/ftpchroot so an alternative chroot
directory can be specified for a user or a group.

Add the manpage ftpchroot(5) since the file's format has grown
complex enough.

PR:			bin/45327
Portions submitted by:	Hideki SAKAMOTO <sakamoto@hlla.is.tsukuba.ac.jp>
MFC after:		1 week
2003-01-26 19:02:56 +00:00

110 lines
3.3 KiB
Groff

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.Dd January 26, 2003
.Dt FTPCHROOT 5
.Os
.Sh NAME
.Nm ftpchroot
.Nd list users and groups subject to FTP access restrictions
.Sh DESCRIPTION
The file
.Nm
is read by
.Xr ftpd 8
at the beginning of an FTP session, after having authenticated the user.
Each line in
.Nm
corresponds to a user or group. If a line in
.Nm
matches the current user or a group he is a member of,
access restrictions will be applied to this
session by changing its root directory with
.Xr chroot 2
to that specified on the line or to the user's login directory.
.Pp
The order of records in
.Nm
is important because the first match will be used.
Fields on each line are separated by tabs or spaces.
.Pp
The first field specifies a user or group name.
If it is prefixed by an
.Qq at
sign,
.Ql \&@ ,
it specifies a group name;
the line will match each user who is a member of this group.
As a special case, a single
.Ql \&@
in this field will match any user.
A username is specified otherwise.
.Pp
The optional second field describes the directory for the user
or each member of the group to be locked up in using
.Xr chroot 2 .
If it is not an absolute pathname, then it will be relative
to the user's login directory.
Be this field omitted, the user's login directory will be used.
.Sh FILES
.Bl -tag -width /etc/ftpchroot -compact
.It Pa /etc/ftpchroot
.El
.Sh EXAMPLES
These lines in
.Nm
will lock up the user
.Qq webuser
and each member of the group
.Qq hostee
in their respective login directories:
.Bd -literal -offset indent
webuser
@hostee
.Ed
.Pp
And this line will lock up the user
.Qq joe
in
.Pa /var/spool/ftp :
.Bd -literal -offset indent
joe /var/spool/ftp
.Ed
.Pp
And finally the following line will lock up every user connecting
through FTP in his respective
.Pa \&~/public_html ,
thus lowering possible impact on the system
from intrinsic insecurity of FTP:
.Bd -literal -offset indent
@ public_html
.Ed
.Sh SEE ALSO
.Xr chroot 2 ,
.Xr group 5 ,
.Xr passwd 5 ,
.Xr ftpd 8 .