Wed Jun 13, 2012 4:44 pm
What's your setup?
I assume its ADSL -> Mikrotik -> LAN(Switch) -> Users
in this setup, Mikrotik router is unable to block the users to access to the LAN, as the users don't talk to the router for that matter. they could be blocked to talk to each other only if the switch could be configured to do so. you could try putting some clients on a different subnet to make them not to be able to talk to each other, but they just need to simply change their subnet and they'll be able to access again. the only secure way (if the switch is not manageable), is to create a separate network (with another switch), and connect it directly to another Mikrotik port, setup the hotspot on that and block any packet forwarding to the private network. that way, the costumers are only able to access to the internet and talk to each other and there won't be access to the other network.
If my assumptions about your network setup were wrong, please provide more detail.