My friend created a dayz server in Pc names "a" ,which ip:port is "IPa:2302". Due to "a" is in another lan ,i cannot connect it using "IPa:PORTa".
So i made a UDP router strategy that echos "IPa:PORTa" to "IPe:PORTe", which i can connect directely in the Earlier version .
I forgot what the version number of the earlier version was, I only know it's been one or two years now.

However, I have been trying to connect to the server using the same method these days, but it dosen't work!
I check router statistics and found that dayz client did not send any UDP packets to "IPe:PORTe".And I conducted an experiment:
make a dayz server in my local Pc, and in the same Pc use dayz client connect server ip:port "128.168.11.3:2302"（this ip is example ,suppose it is a lan ip），
it works ! I successfully entered the game。But if I use "127.0.0.1:2302", the loopback ip，then client dosen't work with no prompts and it looks nothing happends,.

What can i do to connect server in another lan ,by using ip:port echo strategy or something?