2007/7/12, Cyril Andre :
> I'm currently trying to get bugzilla working and everything's fine so
> far. Now I would like to allow anyone to add new bugs into bugzilla but
> I don't want people to be able to close bugs or even reopen a bug that
> has been closed and so on. How do I do that? (I only have one product)

this is described in the docs. See