How to put web server live

Hi!
I am trying to put my web server on internet, so that any one can
access my websites.
I am using CentOS 5 & Till now my all activities ware around local
network for web server.

To make my server live
1. What are the basic requirements those I need to arrange?

2. What is the main difference with local APACHE web server & Live
APACHE web server?

3. Best document resource within all of your knowledge have.........

plz share with me.


Thanks
Sukalyan Banga

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