Your server must meet the following requirements before vBulletin can be installed on the machine. Most shared-environment hosting providers meet these qualifications already. If you're unsure, you can always use vBulletin Cloud to host your vBulletin website.
vBulletin is a web-based application and as such has a few minimum requirements. To run vBulletin, you need a web hosting provider that includes the following on their systems: