Run metin2 server back firewall?

[maxupunk 1]

Excuse my english, but I am using the google translator.

My doubts are as follows: I have a server behind a firewall, and need runs the server with private IP.

But when I select the character, the client attempts to connect to the internal IP (100.0.0.8), and how has no answer back to the login screen.

my server files: maxmi 4.1 I would be grateful if anyone has the solution to sourse. 

Now I appreciate the help.