Go to Security & SD-WAN -> Firewall, and scroll down to "Forwarding rules" section, and press "Add a port forwarding rule". There you enter a description, what uplink port it should apply to, protocol, the public facing port, LAN ip, LAN port, and who should be allowed to use it. In the below example, the rule is applied to both WAN links, and the public facing port, is forwarded to port 80 on machine with IP address 10.10.10.10
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