IIS Security: How to Harden a Windows IIS Web Server in 10 Steps
Microsoft Internet Information Server (IIS) is widely used in the enterprise, despite a less-than-stellar reputation for security. In fact, for many “IIS security” is a contradiction of terms—though in all fairness, Microsoft's web server solution has improved significantly over the years. IIS 8.5 for server 2012 R2 and IIS 10 for 2016 have been hardened and no longer present the dangerous default configurations of older IIS iterations, but can still be further tightened.