Your web server, web hosting package, and e-commerce/web publishing software can all play an important role in the execution of your search engine optimization strategy. If you want to increase traffic to your site, your choices in these areas can help — or hurt — your online success.
http://www.seochat.com/c/a/Search-Engine-Optimization-Help/SEO-Essentials-the-Proper-Web-Server-and-Platform/