The IP address won't matter in this case, for 7.1 you would need to configure mIRC to use UPnP. Go to Alt+O -> Connect -> Options -> Ports... and under the UPnP fieldset check IP address, DCC connections and Identd -- that should set you up.

- argv[0] on EFnet #mIRC
- "Life is a pointer to an integer without a cast"