What is Port Range, Translate to & Trigger port?

Supposedly I set only incoming port from Internet which is 120.34.56.66:678 then mapped to 192.168.100.5:80

port 678--> port 80 IP address 192.168.100.5. So Translate to & Trigger port is what value?

Here I can only select MAC address. Can I put in IP address manually?


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