Vlan configuration

justice1601justice1601 Registered Users Posts: 1 ■□□□□□□□□□
I have created 9 vlans on a cisco packet tracer(Router-on-stick). The sub-interface ip are as follows:
My biggest problem here is that a user from vlan 10 can easily telnet into the router using the sub-interface ip how can I block all users telneting into the router except the administrator who is on vlan 9.
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