i have router board rb750 after Cisco switch that carry 7 Lans (l2) and 4 wans connection
my router board has 5 port 1 for lan and the other 4 for wan . first iwanna route between vlans and prevent some vlans about another vlans
Then just create firewall filter rules lets say block vlan-x to access vlan-y
ip firewall filter add chain=input in-interface=vlan-x out-interface=vlan-y action=drop