Web and Mail Server

[ahmettaha]

I just bought a .com domain name. i dont want to pay the companies to have site. I want to use my own computer for everything. I have static ip. T already have a web site with my ip but I want it to appear when someone writes the domain I boguht. Instead of url forwarding I want to have my own dns server. so I can configure everuthing. I just want to have my own webserver, mail server. ftp etc... when somebody writes something like www.mydomain.com I want my website to appear. how do I do this? do Ineed software for everything? www, dns, mail, ftp? or can I use built in features of mac osx. if yes, how do I configure dns setups. thanks