116. Mikrotik Block PC to Access Local Network(LAN)

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Script:

/ip firewall filter add chain=forward action=drop src-address=192.168.88.103 dst-address=192.168.88.100 comment="Block LAN Access" disabled=no

/interface bridge settings set use-ip-firewall=yes

Ref: https://forum.mikrotik.com/viewtopic.php?t=71106