I have a website that I want to add some restricted access to a sub-folder. For this, I've decided to use CHROOT with SFTP (I mostly followed this link : http://shapeshed.com/chroot_sftp_users_on_ubuntu_intrepid/)

For now, I've created a user (sio2104) and a group (magento).After following the guide, my folder list look like this :

-rw-r--r--  1 root root       27 2012-02-01 14:23 index.html
-rw-r--r--  1 root root       21 2012-02-01 14:24 info.php
drwx------ 15 root root     4096 2012-02-25 00:31 magento

As you can see, i've chown root:root the folder magento I wanted to jail-in the user and ...everything else by the way. Also in the magento folder, I chown sio2104:magento everything so they can access what they want. Finally, I've added this to sshd_config file :

#Subsystem sftp /usr/lib/openssh/sftp-server
Subsystem sftp internal-sftp

Match Group magento
        ChrootDirectory /usr/share/nginx/www/magento
        ForceCommand internal-sftp
        AllowTCPForwarding no
        X11Forwarding no
        PasswordAuthentication yes

#UsePAM yes

And the result is...well, I can enter my login, password and it's all finished with a "broken pipe" error.

$ sftp [email protected]
[....some debug....]
[email protected]'s password: 
debug1: Authentication succeeded (password).
Authenticated to 10.20.0.50 ([10.20.0.50]:22).
debug1: channel 0: new [client-session]
debug1: Requesting [email protected]
debug1: Entering interactive session.
Write failed: Broken pipe
Connection closed

Verbose mode gives nothing to help. Anyone have an idea of what I've done wrong? If I try to login with ssh or sftp with my personnal user, everything works fine.