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RSSH.CONF(5) Derek D. Martin RSSH.CONF(5)
NAME
/etc/rssh.conf - configuration file for rssh
OVERVIEW
rssh.conf is the configuration file for rssh. It allows the system administrator to con-
trol the behavior of the shell. Configuration keywords are either used by themselves on a
line, or followed by an equal sign ('=') and a configuration value. Comments start with a
hash ('#') and can occur anywhere on the line. Configuration options are case insensi-
tive. Spaces at the beginning or end of line, or between the equal sign and the configura-
tion keywords or values are ignored. If the value of a configuration option contains
spaces, it (or at least the space) must be enclosed in either single or double quotes.
A default configuration file is provided with the source distribution of rssh. If no con-
figuration file is used, rssh will assume a default umask of 022, and allow only scp. If
a config file is present, the default is to lock out users if neither scp nor sftp have
been explicitly allowed.
New in v2.1 is the ability to configure options on a per-user basis, using the user key-
word. More details are below.
CONFIGURATION KEYWORDS
allowscp
Tells the shell that scp is allowed.
allowsftp
Tells the shell that sftp is allowed.
allowcvs
Tells the shell that cvs is allowed.
allowrdist
Tells the shell that rdist is allowed.
allowrsync
Tells the shell that rsync is allowed.
umask
Sets the umask value for file creations in the scp/sftp session. This is normally
set at login time by the user's shell. In order not to use the system default,
rssh must set the umask.
logfacility
Allows the system administrator to control what syslog facility rssh logs to. The
facilities are the same as those used by syslogd.conf(5), or the C macros for the
facilities can be used instead. For example:
logfacility=user
logfacility=LOG_USER
are equivalent, and tell rssh to use the user facility for logging to syslog.
chrootpath
Causes rssh (actually a helper program) to call the chroot() system call, changing
the root of the file system to whatever directory is specified. Note that the
value on the right hand side of the equal sign is the name of a directory, not a
command. For example:
chrootpath=/usr/chroot
will change the root of the virtual file system to /usr/chroot, preventing the user
from being able to access anything below /usr/chroot in the file system, and making
/usr/chroot appear to be the root directory. Care must be taken to set up a proper
chroot jail; see the file CHROOT in the rssh source distribution for hints about
how to do this. See also the chroot(2) man page.
If the user's home directory (as specified in /etc/passwd) is underneath the path
specified by this keyword, then the user will be chdir'd into their home directory.
If it is not, then they will be chdir'd to the root of the chroot jail.
In other words, if the jail is /chroot, and your user's home directory is
/chroot/home/user, then once rssh_chroot_helper changes the root of the system, it
will cd into /home/user inside the jail. However, if your user's home directory is
given as /home/user in /etc/passwd, then even if that directory exists in the jail,
the chroot helper will not try to cd there. The user's normal home directory must
live inside the jail for this to work.
user
The user keyword allows for the configuration of options on a per-user basis. THIS
KEYWORD OVERRIDES ALL OTHER KEYWORDS FOR THE SPECIFIED USER. That is, if you use a
user keyword for user foo, then foo will use only the settings in that user line,
and not any of the settings set with the keywords above. The user keyword's argu-
ment consists of a group of fields separated by a colon (':'), as shown below. The
fields are, in order:
username
The username of the user for whom the entry provides options
umask
The umask for this user, in octal, just as it would be specified to the
shell
access bits
Five binary digits, which indicate whether the user is allowed to use rsync,
rdist, cvs, sftp, and scp, in that order. One means the command is allowed,
zero means it is not.
path
The directory to which this user should be chrooted (this is not a command,
it is a directory name). See chroot_path above for complete details.
For example, you might have something like this:
user = luser:022:00001:
This does the following: for the user with the username "luser", set the umask to
022, disallow sftp, and allow scp. Because there is no chroot path specified, the
user will not be chrooted, regardless of default options set with the keywords
above. If you wanted this user to be chrooted, you would need to specify the
chroot path explicitly, even if it should be the same as that set using the chroot-
path keyword. Remember that if there are spaces in the path, you need to quote it,
something like this:
user = "luser:022:00001:/usr/local/chroot dir"
See the default rssh.conf file for more examples.
SEE ALSO
rssh(1), sshd(8), ssh(1), scp(1), sftp(1), syslogd.conf(5), chroot(2).
man pages 7 Jul 2003 RSSH.CONF(5)
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On Apache
Under GNU General Public License
2012-05-26 08:02 @38.107.179.236 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)