Mikrotik - block communication between 2 networks

RouterOS Beginner Basics
1

Hi.

I want to help me with my config. I have a mikrotik RB2011.
On ethernet 1 i have the gateway.
On ethernets ports 2-5 i have my office network (192.168.88.1) LAN A
On ethernets ports 6-10 i have my guests network (192.168.2.1) LAN B

If I open explorer and type the ip from a pc on other network I can see it or ping it.

My problem is how to block communication between LAN A and LAN B.

The other that I am trying to do is after block communication how to permit only a specific mac address from LAN B have access to LAN A.

Thanks

2

Create firewall filter rules to block the traffic
/ip firewall filter
add chain=forward action=drop src-address=192.168.88.0/24 dst-address=192.168.2.0/24
add chain=forward action=drop src-address=192.168.2.0/24 dst-address=192.168.88.0/24