sftp question

[Sandra Fernández García <sandradebian@hotmail.com>]

Hello
I'm trying to make a secure ftp service using ssh.
The problem is when users that connect through sftp or scp, they
can access the directory tree. They can to move easily through the
file system.
I want that users can't go beyond of their home when they use sftp or scp,
and they can't connect to a normal shell, like a normal ftp service.

Any idea?

Thanks and greetings

Pd: excuse my english.., of course

Sandra

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