I want to set up network shares so that any windows machine on the home net can get to them via \\banana\vol1 etc. No authentication or shared secret worries – let the host doing the sharing decide if it can permit write access or not. This is inside my firewall, and only has to be as secure as anything else inside my house.
The way to get this to happen in Samba is to make sure you have these lines in smb.conf
security = share guest account = nobody
Then set the shares up through the gui or through smb.conf, and ensure that the local nobody user has appropriate access to the files or directories.