Your site can be PHP, ASP.NET or without dynamic content. Below is the line we added to this page to embed HTTP Commander:
<iframe src="//demo.element-it.com/iframe/Default.aspx?username=demo&password=demo" id="HTTP_Commander" frameborder="0" style="width: 800px; height: 500px; margin-left: 0px; margin-top: 0px"></iframe>
This is sample without authentication. You can also see iframe demo with Forms athentication.
HTTP Commander is installed at other server and available at stand-alone browser window