Hi!
About Mikrotik router, you no need add input rule, just add a NAT rule:
/ip firewall nat
add action=dst-nat chain=dstnat comment="Storj v3" dst-port=28967 in-interface=ether24 protocol=tcp to-addresses=192.168.XX.XX to-ports=28967
Please replace 192.168.XX.XX to your node IP.