I am trying to Port Forward an Arma 3 server, but nothing that I am trying is working. I have the a newer at&t u-verse router and can't find any tutorials with the updated UI. I've been trying for weeks now. Can anybody help me? The port is 2302. The port never appears as open in any online port checker and when I tried it for minecraft, friends could never join. There is no applications, pinholes, and DMZ option,