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The chrootssh project maintains patches for OpenSSH that allow ssh and sftp to be chrooted.
1. Download and install the latest openssh-chroot tarball from http://chrootssh.sourceforge.net/download/2. Create the chroot environment. The following shell script installs all $REQUIRED_CHROOT_FILES, shared library dependencies, and required device files in $CHROOT_DIR.
Note: The directory to which the user is chrooted should be owned by root.
If this fails, make sure all of the shared libraries referenced in ldd /usr/local/libexec/sftp-server are located in your chroot jail. Example sftp failure message:Request for subsystem 'sftp' failed on channel 0
Using chroot SFTP inside solaris 10 containers has been a problem for some time. Solaris zones don't have their own /dev/ filesystem and can't create device files. OpenSSH 4.9+ versions don't require /dev/zero anymore nor do they need the ./lib and ./bin locations and file like cp, ls etc.
see http://www.minstrel.org.uk/papers/sftp/builtin/ for more information.
This is how set it up:
- create a zone
- install blastwave pkgtool: pkgadd -d http://blastwave.network.com/csw/pkgutil_i386.pkg or for sparc: pkgadd -d http://blastwave.network.com/csw/pkgutil_sparc.pkg
- disable sunssh: svcadm disable ssh
- enable openssh: svcadmin enable cswopenssh
- edit /etc/opt/csw/ssh/sshd_config# Use the following line to *replace* any existing 'Subsystem' line Subsystem sftp internal-sftp # These lines must appear at the *end* of sshd_config Match Group sftponly ChrootDirectory %h ForceCommand internal-sftp AllowTcpForwarding no
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