Setting up Icecast2 streaming server on the Internet for live streaming

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http://askubuntu.com – I have looking through tutorials for setting up Icecast2 server and ices2 on Ubuntu. Unfortunately all of these are based on LAN. I want to set up a Icecast server on a ubuntu machine which will be connected 24/7 to the Internet. The clients need to access the streams, the server provides from across the globe. Assuming the server has a static IP, how do i configure Icecast? Also I have a Behringer UCA 202 as a capture source. How do i configure ices2 to use this as a live capture source and stream it to the the above mentioned server. Thanks in advance. (HowTos)