Only my LAn can log in.

[wicapirate]

Ok my server is up and running good. Kinda wondered, why noone else was logging in, but thought. They must just be going to another servers.
Then I went to another persons house today, and try logging on. They said they couldnt log into my server. So I tried logging on to my GM account on thier PC. In short as long as I am on the same LAN as the server PC, I have always logged in from another PC on the Lan, I can log into the server. But if anyone tried logging in from a PC not on the LAN it wont log in.
If that did not make scents, try logging into my server, Black Rock Knight, and tell me what I need to change so others can come onto the server. Please.