MIKROTIK: How to block TCP invalid state connection in your mikrotik device

In this blog , Lets There are many TCP invalid session have been created and and you want to block those TCP connections . Lets configure the below command to block the invalid states and i will allow only Established TCP state .


/ip firewall filter
add chain=forward connection-state=invalid \ action=drop comment="drop invalid connections"
add chain=forward connection-state=established action=accept \ comment="allow already established connections"
add chain=forward connection-state=related action=accept \ comment="allow related connections"