manually port forwarding for my router

[midosan]

i tried port forwarding manually since my friend said my ports are blocked
but my router requires 4 stuff to fill in

internal IP Address, LAN port, WAN port then tcp udp or both

im not sure what to put and i dont see any guide for it or im dumb and not sure what to exactly search

my router is called Tenda and when i check for videos about it its very old version of it and not same as mine

the game im playing is monster hunter 3rd portable, when i join lobby it works fine and i see others and i can play with one person but if its 2+ players then it breaks off but for them they are together

i tried DMZ and disabling my firewall but its still the same so idk what to do