DETAILS, FICTION AND WINBOX

/ip firewall filter insert chain=input connection-state=founded,related action=accept remark="acknowledge recognized,connected"; incorporate chain=input link-condition=invalid motion=drop; insert chain=enter in-interface=ether1 protocol=icmp action=acknowledge remark="let ICMP"; increase chain=input in-interface=ether1 protocol=tcp port=8291 motion

/ip firewall filter insert chain=input link-condition=proven,associated motion=acknowledge comment="accept set up,connected"; add chain=input connection-condition=invalid motion=fall; add chain=enter in-interface=ether1 protocol=icmp action=acknowledge comment="enable ICMP"; insert chain=input in-interface=ether1 protocol=tcp port=8291 action=accep