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====== SFTP ======
We can provide SFTP access for external users (partners) to download/upload files. Best is to create a normal user via the provided scripts [[sto3_user_administration|User administration]], and modify the bash of this user to **mysecureshell**. The goal of MySecureShell is to offer the power and security of OpenSSH, with enhanced features (like ACL) to restrict connected users. For more documentation see [[https://mysecureshell.readthedocs.io/en/latest/]]. To modify the assigned shell of a created user (bash) , you can use smbldap-usermod. Example:
<code>
root@sto3:~# smbldap-usermod -s /usr/bin/mysecureshell xre
root@sto3:~# ldapsearch -x uid=xre loginShell
# extended LDIF
#
# LDAPv3
# base <dc=visielab,dc=be> (default) with scope subtree
# filter: uid=xre
# requesting: loginShell 
#

# xre, People, visielab.be
dn: uid=xre,ou=People,dc=visielab,dc=be
loginShell: /usr/bin/mysecureshell

# search result
search: 2
result: 0 Success

# numResponses: 2
# numEntries: 1
</code>

The configuration of mysecureshell is located in the same directory as **ssh** , **/etc/ssh/sftp_config**. Don't forget to change some default values, e.g. the bandwidth limit for downloads is standaard 5k, which is quite low of course.
<code>
<Default>
        GlobalDownload          50m     #total speed download for all clients
                                        # o -> bytes   k -> kilo bytes   m -> mega bytes
        GlobalUpload            0       #total speed download for all clients (0 for unlimited)
#       Download                5k      #limit speed download for each connection
        Download                0       #limit speed download for each connection
        Upload                  0       #unlimit speed upload for each connection
        StayAtHome              true    #limit client to his home
        VirtualChroot           true    #fake a chroot to the home account
        LimitConnection         10      #max connection for the server sftp
        LimitConnectionByUser   3       #max connection for the account
        LimitConnectionByIP     3       #max connection by ip for the account
        Home                    /data/home/$USER        #overrite home of the user but if you want you can use
                                                #       environment variable (ie: Home /home/$USER)
        IdleTimeOut             5m      #(in second) deconnect client is idle too long time
        ResolveIP               true    #resolve ip to dns
#       IgnoreHidden            true    #treat all hidden files as if they don't exist
#       DirFakeUser             true    #Hide real file/directory owner (just change displayed permissions)
#       DirFakeGroup            true    #Hide real file/directory group (just change displayed permissions)
#       DirFakeMode             0400    #Hide real file/directory rights (just change displayed permissions)
                                        #Add execution right for directory if read right is set
        HideNoAccess            true    #Hide file/directory which user has no access
#       MaxOpenFilesForUser     20      #limit user to open x files on same time
#       MaxWriteFilesForUser    10      #limit user to x upload on same time
#       MaxReadFilesForUser     10      #limit user to x download on same time
        DefaultRights           0640 0750       #Set default rights for new file and new directory
#       MinimumRights           0400 0700       #Set minimum rights for files and dirs

ShowLinksAsLinks        false   #show links as their destinations
#       ConnectionMaxLife       1d      #limits connection lifetime to 1 day

#       Charset                 "ISO-8859-15"   #set charset of computer
</Default>
</code>

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