LocaltoNet is a reverse proxy that enables you to expose your localhost services to the internet. Publish local webserver, game server or you can connect Raspberry Pi. Its supports HTTP,TCP and UDP. And its free.
Open terminal and run following commands
>> sudo apt-get install git
>> git clone https://github.com/engineseller/localtonet
>> cd localtonet
>> chmod 755 ./install.sh
>> ./install.sh -r
Open terminal and run following commands
>> chmod 755 ./uninstall.sh
>> ./uninstall.sh -r