I have limited sftp users to their home directory using this answer http://serverfault.com/a/201879/65157.
It all seems to be working fine. I only have 1 query though.
When I ever issue an 'ls' command, there appears to be an additional cygwindrive directory. For example I might get a result like this:
sftp> ls cygdrive five six
Can anyone explain why I might get this?