It used to be easy for Web server administrators. If you ran a Windows shop, you used Internet Information Server (IIS), if you didn't, you used Apache. Now, though, you have more Web server choices ...

Microsoft on Tuesday confirmed that it is examining a critical vulnerability in older editions of Internet Information Services (IIS) server, a day after a hacker posted exploit code online.

So Long IIS Data from statistics provider Netcraft show that the number active sites hosted open source web server nginx (pronounced Engine X) has exceeded the number hosted on IIS.