It's not "yes" according the user manual. Only motor vehicles are allowed access. You can't walk, cycle or ride a horse into the site. According the the User manual, Ferry terminals (of which Eurotunnel is) should be set to "permissive" and toll=yes. Permissive does not mean 'by permission' it means anyone is allowed in (after paying the toll) but the site owner can remove their permission at any point. It's not controversial, it's just accurate. Otherwise there wouldn't be the option for 'Permissive'. 