Is it possible to set up a subsite, which members of the parent site cannot access?

Question

We definitely want members of the subsite to access the parent site, but not necessarily the other way round. Is this easy to do?

Answer 1

Yes it is possible, the sub-site has its own Permissions and you can setup its unique permissions so that the users you want have access to sub-site [not all of them]

You simply need to play with Site Settings -> Permissions when in sub-site!

Answer 2

Yes, you have to break role inherticance in subsites

with powershell here: http://marcboes.wordpress.com/2011/03/02/break-inheritance-for-sub-sites-and-remove-visitor-role/

with the GUI I guess its possible as well.