The file extension .shtml stands for . It indicates that the web server should parse the file for Server-Side Includes (SSI) before sending it to the client.
If you find this string in your logs, be warned: it is a favorite target for security scanners. view indexframe shtml
Before PHP and ASP became ubiquitous, SSI was the lightweight way to reuse components (headers, footers, navigation bars) across hundreds of static pages. The file extension