Ubuntu – ProFTPD Virtual User Directory

A symbolic link is a pointer to the "right" file. But if that original file is outside the jail then you can't access it. This is the goal of a jail. Otherwise a normal user could create a symbolic link in the jail to /etc/passwd and just read it. What a security risk!

So jailed is jailed. Probably a hard link will do the job, as this is a "copy without duplicating the used size". And for the FTP server it is like a normal file (with all the problems).

It looks like you are setting their roots to their respective home directories I would recommend adding a symlink in their home folders that goes to the folder you want them directed to. (if you can just delete their home directories and symlink them as those folders. also you might need to allow access to their home folders. I think but am not sure.

UPDATE you could use two virtual hosts to break up the two users and then set the default root for each one.

<VirtualHost my.per-user.virtual.host.address>
 # the next line limits all logins to this virtual host, so that only
 anonftp users can connect

 <Limit LOGIN>
 DenyGroup !anonftp
 </Limit>

 # limit access to each user's anon-ftp directory, we want read-only
 except on incoming

 <Directory ~/anon-ftp>

 <Limit WRITE>
 DenyAll
 </Limit>

 </Directory>

 # permit stor access to each user's anon-ftp/incoming directory,
 but deny everything else

 <Directory ~/anon-ftp/incoming>

 <Limit STOR>
 AllowAll
 </Limit>
 <Limit READ WRITE>
 DenyAll
 </Limit>

 </Directory>

 # provide a default root for all logins to this virtual host.
 DefaultRoot ~/anon-ftp
 # Finally, force all logins to be anonymous for the anonftp group
 AnonymousGroup anonftp

 </VirtualHost>