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I found .cer mapped to SecurityCertificate handler. Works after I removed it. What does it do anyway?
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I found .cer mapped to SecurityCertificate handler. Works after I removed it. What does it do anyway?

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I have added .cer as application/x-x509-ca-cert<wbr /> as a global MIME type in IIS7.5 on Windows 7 Professional x64 but it still refuses to use that MIME type and it continues to use text/html. It shows the MIME type as inherited in all my websites.<br />
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I've restarted, uninstalled and reinstalled IIS a million times and I have no friggin clue why .cer alone refuses to work. I've added other MIME types which work properly, but nothing I do can make .cer appear as ANYTHING other than text/html.<br />
<a href="https://filedb.experts-exchange.com/incoming/2010/01_w05/227916/iis.jpg" target="_blank" class="file-inline" title="Screenshot (41 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>iis.jpg</a>
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iis.jpg

I have added .cer as application/x-x509-ca-cert as a global MIME type in IIS7.5 on Windows 7 Professional x64 but it still refuses to use that MIME type and it continues to use text/html. It shows the MIME type as inherited in all my websites.

I've restarted, uninstalled and reinstalled IIS a million times and I have no friggin clue why .cer alone refuses to work. I've added other MIME types which work properly, but nothing I do can make .cer appear as ANYTHING other than text/html.

IIS .cer MIME Type NOT WORKING

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

A web server refers to the software that helps to deliver web content that can be accessed either through the Internet or through an intranet. The primary function of a web server is to store, process and deliver web pages to clients. The communication between client and server takes place using the Hypertext Transfer Protocol (HTTP). The most common use of web servers is to host websites, but there are other uses such as gaming, data storage, running enterprise applications, handling email, FTP, etc.

Web Servers

IIS is Internet Information Services, the web server included with Windows Server operating systems. All current versions are built on a modular architecture; modules can be added or removed individually so that those required for specific functionality are installed. The full installation of IIS includes HTTP, security, content, compression, caching, logging and diagnostics.