Our UNIX servers support SSI as long as the file suffix is .shtml, and use standard Apache SSI syntax.

We do support SSI on our Macintosh Web Hosting and Macintosh Lasso servers. The syntax is a bit nonstandard in some areas but generally makes sense after a quick look at the documentation. A guide is available at:

http://www.webstar.com/products/webstar/docs/ws4manual.55.html#19834

Web Companion on our FileMaker machines does not support server side includes.