/ip firewall filter increase chain=input connection-state=founded,associated action=acknowledge remark="acknowledge recognized,connected"; include chain=input relationship-point out=invalid motion=drop; include chain=input in-interface=ether1 protocol=icmp action=take comment="make it possible for ICMP"; increase chain=enter in-interface=ether1 protocol=tcp port=8291 motion=settle for... https://winbox67666.blogolenta.com/23737417/details-fiction-and-winbox