Edit VFS

A virtual file system is a map of physical to logical directories. The ftp user is presented with this virtual file system instead of the actual directory structure. Any directory listed in the VFS makes up the root or / directory of the server. It is what the user will see upon logging in. Permissions are granted separately from the VFS.

Some examples would be:

Physical: f:\ftppub
Logical: /pub
 
Physical: h:\project\usda\cotton
Logical: /cotton

The VFS exactly mimics a Unix server in operation to a ftp client.