I have an old computer running Ubuntu 10.04. I installed a LAMP server on it and it works fine; however, the computer is connected to the internet through a large network connected to one modem. I have the ip address of the computer/server for our network, and it works fine, but I need this server to be accessible from the internet, anywhere. I have the ip address of the modem, but using it returns a "server not found" error. Any help would be greatly appreciated.