[PLUG] setting up SSH to chrrot to user homeDir
Larry Brigman
larry.brigman at gmail.com
Fri Jul 21 17:09:12 UTC 2006
On 7/20/06, Josh Orchard <josh at emediatedesigns.com> wrote:
> Hello all,
>
> Been looking about the wonderful web and reading about how I could
> achieve this but all that I've found makes it sound like I need to setup
> yet another customer product of sorts. So...
>
> Is there a way that I can configure SSHD to allow clients to login but
> be chrooted to their home directory?
>
> FTP does this well and I would like to have it do the same for SSHD.
> I'm actually surprised this isn't a configuration option on OpenSSH as
> it would make sense that you would want to allow certain shell access
> but not allow all people to go about browsing your entire server.
>
> So, is this possible? Do I need some sort of custom SSH or is there
> another program I can use to give secure Shell access?
>
What about setting the users shell to rbash or bash -r.
>From the bash man page:
RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at
invocation, the shell becomes restricted. A restricted shell is used
to set up an environment more controlled than the standard shell. It
behaves identically to bash with the exception that the following are
disallowed or not performed:
changing directories with cd
setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
specifying command names containing /
specifying a file name containing a / as an argument to the .
builtin command
Specifying a filename containing a slash as an argument to the
-p option to the hash builtin command
importing function definitions from the shell environment at
startup
parsing the value of SHELLOPTS from the shell environment at
startup
redirecting output using the >, >|, <>, >&, &>, and >> redirec-
tion operators
using the exec builtin command to replace the shell with another
command
adding or deleting builtin commands with the -f and -d options
to the enable builtin command
Using the enable builtin command to enable disabled shell
builtins
specifying the -p option to the command builtin command
turning off restricted mode with set +r or set +o restricted.
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