I have Site collection (http://myapp/sites/sitcol) and i have two site in that site collections i.e root site (http://myapp/sites/sitcol/) and site2 (http://myapp/sites/sitcol/site2). i have two security groups, i want to set security so that group1 has contributor rights on both site and group2 has contributor rights to only site2. IMPORTANT: when user in group1 access "http://myapp/sites/sitcol" url it should to go to site1 and when user from group2 access "http://myapp/sites/sitcol" url it should go to site2.
how can i achieve this?